PI7C9X110

PI7C9X110
PCI Express-to-PCI
Reversible Bridge
Revision 3.0
3545 North 1ST Street, San Jose, CA 95134
Phone: 1-877-PERICOM (1-877-737-4266)
FAX: 1-408-435-1100
Internet: http://www.pericom.com
PI7C9X110
PCIe-to-PCI Reversible Bridge
LIFE SUPPORT POLICY
Pericom Semiconductor Corporation’s products are not authorized for use as critical components in life support devices or systems unless a specific
written agreement pertaining to such intended use is executed between the manufacturer and an officer of PSC.
1)
2)
Life support devices or system are devices or systems which:
a) Are intended for surgical implant into the body or
b) Support or sustain life and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can
be reasonably expected to result in a significant injury to the user.
A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of
the life support device or system, or to affect its safety or effectiveness. Pericom Semiconductor Corporation reserves the right to make changes to
its products or specifications at any time, without notice, in order to improve design or performance and to supply the best possible product. Pericom
Semiconductor does not assume any responsibility for use of any circuitry described other than the circuitry embodied in a Pericom Semiconductor
product. The Company makes no representations that circuitry described herein is free from patent infringement or other rights of third parties which
may result from its use. No license is granted by implication or otherwise under any patent, patent rights or other rights, of Pericom Semiconductor
Corporation.
All other trademarks are of their respective companies.
Page 2 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
REVISION HISTORY
DATE
REVISION #
09/08/2006
11/21/2006
03/06/2007
05/02/2007
2.0
2.1
2.2
2.3
11/02/2007
01/03/2008
05/16/2008
2.4
2.5
2.6
09/25/2008
08/21/2009
09/14/2009
10/10/2009
04/28/2010
2.6
2.7
2.8
2.9
3.0
DESCRIPTION
First release of 9X110 datasheet without revision suffix
Removed references to PI7C9X110A
Revised ESD ratings in “DC Specifications” section 16.2
Revised table 8-1 in section 8
Address bit[5] corrected to equal 0
Address bit[4] corrected to equal GPIO[3]
Revised logos and font types and added Industrial Temp Compliancy
Revised Industrial Temp Compliancy
Revised Minimum PCI Frequency Support to 10MHz
Added Leaded Part Number – PI7C9X110BNB
Added additional pin description to GPIO [3:0]
Revised Ordering Info Section for Leaded Part
Revised Revision ID Register definition
Updated the pin description of PCI Express Signals
PCIX Feature is removed from Datasheets
PREFACE
The datasheet of PI7C9X110 will be enhanced periodically when updated information is available. The technical
information in this datasheet is subject to change without notice. This document describes the functionalities of
PI7C9X110 (PCI Express Bridge) and provides technical information for designers to design their hardware using
PI7C9X110.
Page 3 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
TABLE OF CONTENTS
1
INTRODUCTION ........................................................................................................................ 14
1.1
1.2
1.3
2
PIN DEFINITIONS ...................................................................................................................... 16
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
3
PCI EXPRESS FEATURES ............................................................................................................................... 14
PCI FEATURES................................................................................................................................................. 15
GENERAL FEATURES ..................................................................................................................................... 15
SIGNAL TYPES ................................................................................................................................................. 16
PCI EXPRESS SIGNALS................................................................................................................................... 16
PCI SIGNALS..................................................................................................................................................... 16
MODE SELECT AND STRAPPING SIGNALS ............................................................................................... 18
JTAG BOUNDARY SCAN SIGNALS .............................................................................................................. 18
MISCELLANEOUS SIGNALS.......................................................................................................................... 18
POWER AND GROUND PINS.......................................................................................................................... 19
PIN ASSIGNMENTS ......................................................................................................................................... 19
MODE SELECTION AND PIN STRAPPING.......................................................................... 21
3.1
3.3
FUNCTIO NAL MODE SELECTION ............................................................................................................... 21
PIN STRAPPING................................................................................................................................................ 21
4
FORWARD AND REVERSE BRIDGING ................................................................................ 21
5
TRANSPARENT AND NON-TRANSPARENT BRIDGING.................................................. 24
5.1
5.2
6
PCI EXPRESS FUNCTIONAL OVERVIEW........................................................................... 26
6.1
6.2
7
TRANSPARENT MODE ................................................................................................................................... 24
NON-TRANSPARENT MODE.......................................................................................................................... 24
TLP STRUCTURE ............................................................................................................................................. 26
VIRTUAL ISOCHRONOUS OPERATION....................................................................................................... 26
CONFIGURATION REGISTERS.............................................................................................. 26
7.1
CONFIGURATION REGISTER MAP .............................................................................................................. 27
7.2
PCI EXPRESS EXTENDED CAPABILITY REGISTER MAP ........................................................................ 30
7.3
CONTROL AND STATUS REGISTER MAP................................................................................................... 31
7.4
PCI CONFIGURATION REGISTERS FOR TRANSPARENT BRIDGE MODE ............................................ 32
7.4.1
VENDOR ID – OFFSET 00h ................................................................................................................ 33
7.4.2
DEVICE ID – OFFSET 00h.................................................................................................................. 33
7.4.3
COMMAND REGISTER – OFFSET 04h .............................................................................................. 33
7.4.4
PRIMARY STATUS REGISTER – OFFSET 04h................................................................................... 34
7.4.5
REVISION ID REGISTER – OFFSET 08h ........................................................................................... 35
7.4.6
CLASS CODE REGISTER – OFFSET 08h ........................................................................................... 35
7.4.7
CACHE LINE SIZE REGISTER – OFFSET 0Ch.................................................................................. 35
7.4.8
PRIMARY LATENCY TIMER REGISTER – OFFSET 0Ch .................................................................. 36
7.4.9
PRIMARY HEADER TYPE REGISTER – OFFSET 0Ch ...................................................................... 36
7.4.10
RESERVED REGISTERS – OFFSET 10h TO 17h................................................................................ 36
7.4.11
PRIMARY BUS NUMBER REGISTER – OFFSET 18h ........................................................................ 36
7.4.12
SECONDARY BUS NUMBER REGISTER – OFFSET 18h .................................................................. 36
7.4.13
SUBORDINATE BUS NUMBER REGISTER – OFFSET 18h .............................................................. 36
7.4.14
SECONDARY LATENCY TIME REGISTER – OFFSET 18h................................................................ 36
7.4.15
I/O BASE REGISTER – OFFSET 1Ch.................................................................................................. 36
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Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
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7.4.65
7.4.66
7.4.67
I/O LIMIT REGISTER – OFFSET 1Ch................................................................................................. 37
SECONDARY STATUS REGISTER – OFFSET 1Ch ............................................................................ 37
MEMORY BASE REGISTER – OFFSET 20h ....................................................................................... 38
MEMORY LIMIT REGISTER – OFFSET 20h ...................................................................................... 38
PREFETCHABLE MEMORY BASE REGISTER – OFFSET 24h......................................................... 38
PREFETCHABLE MEMORY LIMIT REGISTER – OFFSET 24h........................................................ 38
PREFETCHABLE BASE UPPER 32-BIT REGISTER – OFFSET 28h................................................. 40
PREFETCHABLE LIMIT UPPER 32-BIT REGISTER – OFFSET 2Ch............................................... 40
I/O BASE UPPER 16-BIT REGISTER – OFFSET 30h......................................................................... 40
I/O LIMIT UPPER 16-BIT REGISTER – OFFSET 30h........................................................................ 40
CAPABILITY POINTER – OFFSET 34h .............................................................................................. 40
EXPANSION ROM BASE ADDRESS REGISTER – OFFSET 38h ....................................................... 40
INTERRUPT LINE REGISTER – OFFSET 3Ch................................................................................... 40
INTERRUPT PIN REGISTER – OFFSET 3Ch ..................................................................................... 41
BRIDGE CONTROL REGISTER – OFFSET 3Ch ................................................................................ 41
PCI DATA BUFFERING CONTROL REGISTER – OFFSET 40h ....................................................... 42
CHIP CONTROL 0 REGISTER – OFFSET 40h................................................................................... 43
RESERVED REGISTER – OFFSET 44h............................................................................................... 45
ARBITER ENABLE REGISTER – OFFSET 48h................................................................................... 45
ARBITER MODE REGISTER – OFFSET 48h...................................................................................... 45
ARBITER PRIORITY REGISTER – OFFSET 48h ................................................................................ 46
RESERVED REGISTERS – OFFSET 4Ch – 64h .................................................................................. 47
EXPRESS TRANSMITTER/RECEIVER REGISTER – OFFSET 68h.................................................... 47
UPSTREAM MEMORY WRITE FRAGMENT CONTROL REGISTER – OFFSET 68h ....................... 48
RESERVED REGISTER – OFFSET 6Ch .............................................................................................. 48
EEPROM AUTOLOAD CONTROL/STATUS REGISTER – OFFSET 70h........................................... 48
RESERVED REGISTER – OFFSET 74h............................................................................................... 50
GPIO DATA AND CONTROL REGISTER – OFFSET 78h.................................................................. 50
RESERVED REGISTER – OFFSET 7Ch .............................................................................................. 50
CAPABILITY ID REGISTER – OFFSET 80h ...................................................................................... 50
NEXT CAPABILITY POINTER REGISTER – OFFSET 80h ................................................................ 50
SECONDARY STATUS REGISTER – OFFSET 80h............................................................................ 50
BRIDGE STATUS REGISTER – OFFSET 84h .................................................................................... 51
UPSTREAM SPLIT TRANSACTION REGISTER – OFFSET 88h ........................................................ 52
DOWNSTREAM SPLIT TRANSACTION REGISTER – OFFSET 8Ch ................................................. 52
POWER MANAGEMENT ID REGISTER – OFFSET 90h.................................................................... 53
NEXT CAPABILITY POINTER REGISTER – OFFSET 90h ................................................................ 53
POWER MANAGEMENT CAPABILITY REGISTER – OFFSET 90h .................................................. 53
POWER MANAGEMENT CONTROL AND STATUS REGISTER – OFFSET 94h .............................. 54
PCI-TO-PCI SUPPORT EXTENSION REGISTER – OFFSET 94h ..................................................... 54
RESERVED REGISTERS – OFFSET 98h – 9Ch .................................................................................. 54
CAPABILITY ID REGISTER – OFFSET A0h....................................................................................... 54
NEXT POINTER REGISTER – OFFSET A0h....................................................................................... 54
SLOT NUMBER REGISTER – OFFSET A0h ....................................................................................... 55
CHASSIS NUMBER REGISTER – OFFSET A0h ................................................................................. 55
SECONDARY CLOCK AND CLKRUN CONTROL REGISTER – OFFSET A4h................................. 55
CAPABILITY ID REGISTER – OFFSET A8h....................................................................................... 56
NEXT POINTER REGISTER – OFFSET A8h....................................................................................... 56
RESERVED REGISTER – OFFSET A8h .............................................................................................. 56
SUBSYSTEM VENDOR ID REGISTER – OFFSET ACh...................................................................... 57
SUBSYSTEM ID REGISTER – OFFSET ACh ...................................................................................... 57
PCI EXPRESS CAPABILITY ID REGISTER – OFFSET B0h .............................................................. 57
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Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
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7.4.116
7.4.117
7.4.118
7.4.119
NEXT CAPABILITY POINTER REGISTER – OFFSET B0h ................................................................ 57
PCI EXPRESS CAPABILITY REGISTER – OFFSET B0h ................................................................... 57
DEVICE CAPABILITY REGISTER – OFFSET B4h............................................................................. 57
DEVICE CONTROL REGISTER – OFFSET B8h................................................................................. 58
DEVICE STATUS REGISTER – OFFSET B8h..................................................................................... 59
LINK CAPABILITY REGISTER – OFFSET BCh ................................................................................. 59
LINK CONTROL REGISTER – OFFSET C0h...................................................................................... 60
LINK STATUS REGISTER – OFFSET C0h.......................................................................................... 60
SLOT CAPABILITY REGISTER – OFFSET C4h ................................................................................. 61
SLOT CONTROL REGISTER – OFFSET C8h ..................................................................................... 61
SLOT STATUS REGISTER – OFFSET C8h ......................................................................................... 62
XPIP CONFIGURATION REGISTER 0 – OFFSET CCh..................................................................... 62
XPIP CONFIGURATION REGISTER 1 – OFFSET D0h ..................................................................... 62
XPIP CONFIGURATION REGISTER 2 – OFFSET D4h ..................................................................... 62
HOT SWAP SWITCH DEBOUNCE COUNTER – OFFSET D4h......................................................... 64
CAPABILITY ID REGISTER – OFFSET D8h ...................................................................................... 64
NEXT POINTER REGISTER – OFFSET D8h ...................................................................................... 64
VPD REGISTER – OFFSET D8h ......................................................................................................... 64
VPD DATA REGISTER – OFFSET DCh.............................................................................................. 64
RESERVED REGISTERS – OFFSET E0h – ECh ................................................................................. 65
MESSAGE SIGNALED INTERRUPTS ID REGISTER – F0h............................................................... 65
NEXT CAPABILITIES POINTER REGISTER – F0h............................................................................ 65
MESSAGE CONTROL REGISTER – OFFSET F0h ............................................................................. 65
MESSAGE ADDRESS REGISTER – OFFSET F4h .............................................................................. 65
MESSAGE UPPER ADDRESS REGISTER – OFFSET F8h................................................................. 65
MESSAGE DATA REGISTER – OFFSET FCh..................................................................................... 66
ADVANCE ERROR REPORTING CAPABILITY ID REGISTER – OFFSET 100h .............................. 66
ADVANCE ERROR REPORTING CAPABILITY VERSION REGISTER – OFFSET 100h .................. 66
NEXT CAPABILITY OFFSET REGISTER – OFFSET 100h ................................................................ 66
UNCORRECTABLE ERROR STATUS REGISTER – OFFSET 104h ................................................... 66
UNCORRECTABLE ERROR MASK REGISTER – OFFSET 108h ...................................................... 66
UNCORRECTABLE ERROR SEVERITY REGISTER – OFFSET 10Ch............................................... 67
CORRECTABLE ERROR STATUS REGISTER – OFFSET 110h......................................................... 67
CORRECTABLE ERROR MASK REGISTER – OFFSET 114h ............................................................ 67
ADVANCED ERROR CAPABILITIES AND CONTROL REGISTER – OFFSET 118h........................ 68
HEADER LOG REGISTER 1 – OFFSET 11Ch .................................................................................... 68
HEADER LOG REGISTER 2 – OFFSET 120h..................................................................................... 68
HEADER LOG REGISTER 3 – OFFSET 124h..................................................................................... 68
HEADER LOG REGISTER 4 – OFFSET 128h..................................................................................... 68
SECONDARY UNCORRECTABLE ERROR STATUS REGISTER – OFFSET 12Ch ........................... 68
SECONDARY UNCORRECTABLE ERROR MASK REGISTER – OFFSET 130h ............................... 69
SECONDARY UNCORRECTABLE ERROR SEVERITY REGISTER – OFFSET 134h ........................ 69
SECONDARY ERROR CAPABILITY AND CONTROL REGISTER – OFFSET 138h.......................... 70
SECONDARY HEADER LOG REGISTER – OFFSET 13Ch – 148h.................................................... 70
RESERVED REGISTER – OFFSET 14Ch ............................................................................................ 70
VC CAPABILITY ID REGISTER – OFFSET 150h ............................................................................... 70
VC CAPABILITY VERSION REGISTER – OFFSET 150h ................................................................... 70
NEXT CAPABILITY OFFSET REGISTER – OFFSET 150h ................................................................ 71
PORT VC CAPABILITY REGISTER 1 – OFFSET 154h ...................................................................... 71
PORT VC CAPABILITY REGISTER 2 – OFFSET 158h ...................................................................... 71
PORT VC CONTROL REGISTER – OFFSET 15Ch............................................................................. 71
PORT VC STATUS REGISTER – OFFSET 15Ch................................................................................. 71
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Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
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7.5
VC0 RESOURCE CAPABILITY REGISTER – OFFSET 160h ............................................................. 71
VC0 RESOURCE CONTROL REGISTER – OFFSET 164h ................................................................. 71
VC0 RESOURCE STATUS REGISTER – OFFSET 168h ..................................................................... 72
RESERVED REGISTERS – OFFSET 16Ch – 300h .............................................................................. 72
EXTRA GPI/GPO DATA AND CONTROL REGISTER – OFFSET 304h............................................. 72
RESERVED REGISTERS – OFFSET 308h – 30Ch .............................................................................. 72
REPLAY AND ACKNOWLEDGE LATENCY TIMERS – OFFSET 310h ............................................. 72
RESERVED REGISTERS – OFFSET 314h – FFCh ............................................................................. 72
PCI CONFIGURATION REGISTERS FOR NON-TRANSPARENT BRIDGE MODE..... 73
7.5.1
7.5.2
7.5.3
7.5.4
7.5.5
7.5.6
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7.5.35
7.5.36
7.5.37
7.5.38
7.5.39
7.5.40
7.5.41
7.5.42
7.5.43
VENDOR ID – OFFSET 00h ................................................................................................................ 73
DEVICE ID – OFFSET 00h.................................................................................................................. 73
COMMAND REGISTER – OFFSET 04h .............................................................................................. 73
PRIMARY STATUS REGISTER – OFFSET 04h................................................................................... 74
REVISION ID REGISTER – OFFSET 08h ........................................................................................... 75
CLASS CODE REGISTER – OFFSET 08h ........................................................................................... 75
CACHE LINE SIZE REGISTER – OFFSET 0Ch.................................................................................. 76
PRIMARY LATENCY TIMER REGISTER – OFFSET 0Ch .................................................................. 76
PRIMARY HEADER TYPE REGISTER – OFFSET 0Ch ...................................................................... 76
PRIMARY CSR AND MEMORY 0 BASE ADDRESS REGISTER – OFFSET 10h................................ 76
PRIMARY CSR I/O BASE ADDRESS REGISTER – OFFSET 14h ....................................................... 77
DOWNSTREAM I/O OR MEMORY 1 BASE ADDRESS REGISTER – OFFSET 18h .......................... 77
DONWSTREAM MEMORY 2 BASE ADDRESS REGISTER – OFFSET 1Ch ...................................... 78
DOWNSTREAM MEMORY 3 BASE ADDRESS REGISTER – OFFSET 20h....................................... 78
DOWNSTREAM MEMORY 3 UPPER BASE ADDRESS REGISTER – OFFSET 24h ......................... 79
RESERVED REGISTER – OFFSET 28h............................................................................................... 79
SUBSYTEM ID AND SUBSYSTEM VENDOR ID REGISTER – OFFSET 2Ch.................................... 79
RESERVED REGISTER – OFFSET 30h............................................................................................... 79
CAPABILITY POINTER – OFFSET 34h .............................................................................................. 79
EXPANSION ROM BASE ADDRESS REGISTER – OFFSET 38h ....................................................... 79
PRIMARY INTERRUPT LINE REGISTER – OFFSET 3Ch ................................................................. 79
PRIMARY INTERRUPT PIN REGISTER – OFFSET 3Ch.................................................................... 79
PRIMARY MINIMUM GRANT REGISTER – OFFSET 3Ch ................................................................ 80
PRIMARY MAXIMUM LATENCY TIME REGISTER – OFFSET 3Ch................................................. 81
PCI DATA BUFFERING CONTROL REGISTER – OFFSET 40h ....................................................... 81
CHIP CONTROL 0 REGISTER – OFFSET 40h................................................................................... 82
SECONDARY COMMAND REGISTER – OFFSET 44h ...................................................................... 83
SECONDARY STATUS REGISTER – OFFSET 44h............................................................................. 84
ARBITER ENABLE REGISTER – OFFSET 48h................................................................................... 85
ARBITER MODE REGISTER – OFFSET 48h...................................................................................... 86
ARBITER PRIORITY REGISTER – OFFSET 48h ................................................................................ 87
SECONDARY CACHE LINE SIZE REGISTER – OFFSET 4Ch .......................................................... 87
SECONDARY LATENCY TIME REGISTER – OFFSET 4Ch............................................................... 88
SECONDARY HEADER TYPE REGISTER – OFFSET 4Ch ................................................................ 88
SECONDARY CSR AND MEMORY 0 BASE ADDRESS REGISTER – OFFSET 50h.......................... 88
SECONDARY CSR I/O BASE ADDRESS REGISTER – OFFSET 54h ................................................. 89
UPSTREAM I/O OR MEMORY 1 BASE ADDRESS REGISTER – OFFSET 58h................................. 89
UPSTREAM MEMORY 2 BASE ADDRESS REGISTER – OFFSET 5Ch............................................. 89
UPSTREAM MEMORY 3 BASE ADDRESS REGISTER – OFFSET 60h ............................................. 90
UPSTREAM MEMORY 3 UPPER BASE ADDRESS REGISTER – OFFSET 64h................................ 91
EXPRESS TRANSMITTER/RECEIVER REGISTER – OFFSET 68h.................................................... 91
MEMORY ADDRESS FORWARDING CONTROL REGISTER – OFFSET 68h .................................. 92
UPSTREAM MEMORY WRITE FRAGMENT CONTROL REGISTER – OFFSET 68h ....................... 93
Page 7 of 144
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PCIe-to-PCI Reversible Bridge
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SUBSYSTEM VENDOR ID REGISTER – OFFSET 6Ch ...................................................................... 93
SUBSYSTEM ID REGISTER – OFFSET 6Ch....................................................................................... 93
EEPROM AUTOLOAD CONTROL/STATUS REGISTER – OFFSET 70h........................................... 93
RESERVED REGISTER – OFFSET 74h............................................................................................... 94
BRIDGE CONTROL AND STATUS REGISTER – OFFSET 78h ......................................................... 94
GPIO DATA AND CONTROL REGISTER – OFFSET 78h.................................................................. 95
SECONDARY INTERRUPT LINE REGISTER – OFFSET 7Ch ........................................................... 95
SECONDARY INTERRUPT PIN REGISTER – OFFSET 7Ch.............................................................. 95
SECONDARY MINIMUM GRANT REGISTER – OFFSET 7Ch .......................................................... 95
SECONDARY MAXIMUM LATENCY TIMER REGISTER – OFFSET 7Ch......................................... 95
CAPABILITY ID REGISTER – OFFSET 80h ...................................................................................... 96
NEXT CAPABILITY POINTER REGISTER – OFFSET 80h ................................................................ 96
SECONDARY STATUS REGISTER – OFFSET 80h............................................................................ 96
BRIDGE STATUS REGISTER – OFFSET 84h .................................................................................... 97
UPSTREAM SPLIT TRANSACTION REGISTER – OFFSET 88h ........................................................ 98
DOWNSTREAM SPLIT TRANSACTION REGISTER – OFFSET 8Ch ................................................. 98
POWER MANAGEMENT ID REGISTER – OFFSET 90h.................................................................... 98
NEXT CAPABILITY POINTER REGISTER – OFFSET 90h ................................................................ 99
POWER MANAGEMENT CAPABILITY REGISTER – OFFSET 90h .................................................. 99
POWER MANAGEMENT CONTROL AND STATUS REGISTER – OFFSET 94h .............................. 99
PCI-TO-PCI SUPPORT EXTENSION REGISTER – OFFSET 94h ................................................... 100
DOWNSTREAM MEMORY 0 TRANSLATED BASE REGISTER – OFFSET 98h .............................. 100
DOWNSTREAM MEMORY 0 SETUP REGISTER – OFFSET 9Ch ................................................... 100
CAPABILITY ID REGISTER – OFFSET A0h..................................................................................... 101
NEXT POINTER REGISTER – OFFSET A0h..................................................................................... 102
SLOT NUMBER REGISTER – OFFSET A0h ..................................................................................... 102
CHASSIS NUMBER REGISTER – OFFSET A0h ............................................................................... 102
SECONDARY CLOCK AND CLKRUN CONTROL REGISTER – OFFSET A4h............................... 102
DONWSTREAM I/O OR MEMORY 1 TRANSLATED BASE REGISTER – OFFSET A8h ................. 103
DOWSTREAM I/O OR MEMORY 1 SETUP REGISTER – OFFSET ACh ......................................... 104
PCI EXPRESS CAPABILITY ID REGISTER – OFFSET B0h ............................................................ 104
NEXT CAPABILITY POINTER REGISTER – OFFSET B0h .............................................................. 104
PCI EXPRESS CAPABILITY REGISTER – OFFSET B0h ................................................................. 104
DEVICE CAPABILITY REGISTER – OFFSET B4h........................................................................... 105
DEVICE CONTROL REGISTER – OFFSET B8h............................................................................... 106
DEVICE STATUS REGISTER – OFFSET B8h................................................................................... 106
LINK CAPABILITY REGISTER – OFFSET BCh ............................................................................... 107
LINK CONTROL REGISTER – OFFSET C0h.................................................................................... 107
LINK STATUS REGISTER – OFFSET C0h........................................................................................ 109
SLOT CAPABILITY REGISTER – OFFSET C4h ............................................................................... 109
SLOT CONTROL REGISTER – OFFSET C8h ................................................................................... 109
SLOT STATUS REGISTER – OFFSET C8h ....................................................................................... 110
XPIP CONFIGURATION REGISTER 0 – OFFSET CCh................................................................... 110
XPIP CONFIGURATION REGISTER 1 – OFFSET D0h ................................................................... 110
XPIP CONFIGURATION REGISTER 2 – OFFSET D4h ................................................................... 110
CAPABILITY ID REGISTER – OFFSET D8h .................................................................................... 111
NEXT POINTER REGISTER – OFFSET D8h .................................................................................... 111
VPD REGISTER – OFFSET D8h ....................................................................................................... 111
VPD DATA REGISTER – OFFSET DCh............................................................................................ 111
UPSTREAM MEMORY 0 TRANSLATED BASE REGISTER – OFFSET E0h .................................... 111
UPSTREAM MEMORY 0 SETUP REGISTER – OFFSET E4h .......................................................... 112
UPSTREAM I/O OR MEMORY 1 TRANSLATED BASE REGISTER – OFFSET E8h ....................... 112
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PCIe-to-PCI Reversible Bridge
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7.5.120
7.5.121
7.5.122
7.5.123
7.5.124
7.5.125
7.5.126
7.5.127
7.5.128
7.5.129
7.5.130
7.5.131
7.5.132
7.5.133
7.5.134
7.5.135
7.5.136
7.6
UPSTREAM I/O OR MEMORY 1 SETUP REGISTER – OFFSET ECh............................................. 112
MESSAGE SIGNALED INTERRUPTS ID REGISTER – F0h............................................................. 114
NEXT CAPABILITIES POINTER REGISTER – F0h.......................................................................... 114
MESSAGE CONTROL REGISTER – OFFSET F0h ........................................................................... 114
MESSAGE ADDRESS REGISTER – OFFSET F4h ............................................................................ 114
MESSAGE UPPER ADDRESS REGISTER – OFFSET F8h............................................................... 114
MESSAGE DATA REGISTER – OFFSET FCh................................................................................... 114
ADVANCE ERROR REPORTING CAPABILITY ID REGISTER – OFFSET 100h ............................ 115
ADVANCE ERROR REPORTING CAPABILITY VERSION REGISTER – OFFSET 100h ................ 115
NEXT CAPABILITY OFFSET REGISTER – OFFSET 100h .............................................................. 115
UNCORRECTABLE ERROR STATUS REGISTER – OFFSET 104h ................................................. 115
UNCORRECTABLE ERROR MASK REGISTER – OFFSET 108h .................................................... 115
UNCORRECTABLE ERROR SEVERITY REGISTER – OFFSET 10Ch............................................. 116
CORRECTABLE ERROR STATUS REGISTER – OFFSET 110h....................................................... 116
CORRECTABLE ERROR MASK REGISTER – OFFSET 114h .......................................................... 116
ADVANCED ERROR CAPABILITIES AND CONTROL REGISTER – OFFSET 118h...................... 117
HEADER LOG REGISTER 1 – OFFSET 11Ch .................................................................................. 117
HEADER LOG REGISTER 2 – OFFSET 120h................................................................................... 117
HEADER LOG REGISTER 3 – OFFSET 124h................................................................................... 117
HEADER LOG REGISTER 4 – OFFSET 128h................................................................................... 117
SECONDARY UNCORRECTABLE ERROR STATUS REGISTER – OFFSET 12Ch ......................... 117
SECONDARY UNCORRECTABLE ERROR MASK REGISTER – OFFSET 130h ............................. 118
SECONDARY UNCORRECTABLE ERROR SEVERITY REGISTER – OFFSET 134h ...................... 118
SECONDARY ERROR CAPABILITY AND CONTROL REGISTER – OFFSET 138h........................ 119
SECONDARY HEADER LOG REGISTER – OFFSET 13Ch – 148h.................................................. 119
RESERVED REGISTER – OFFSET 14Ch .......................................................................................... 119
VC CAPABILITY ID REGISTER – OFFSET 150h ............................................................................. 119
VC CAPABILITY VERSION REGISTER – OFFSET 150h ................................................................. 119
NEXT CAPABILITY OFFSET REGISTER – OFFSET 150h .............................................................. 120
PORT VC CAPABILITY REGISTER 1 – OFFSET 154h .................................................................... 120
PORT VC CAPABILITY REGISTER 2 – OFFSET 158h .................................................................... 120
PORT VC CONTROL REGISTER – OFFSET 15Ch........................................................................... 120
PORT VC STATUS REGISTER – OFFSET 15Ch............................................................................... 120
VC0 RESOURCE CAPABILITY REGISTER – OFFSET 160h ........................................................... 120
VC0 RESOURCE CONTROL REGISTER – OFFSET 164h ............................................................... 120
VC0 RESOURCE STATUS REGISTER – OFFSET 168h ................................................................... 121
RESERVED REGISTERS – OFFSET 16Ch – 300h ............................................................................ 121
EXTRA GPI/GPO DATA AND CONTROL REGISTER – OFFSET 304h........................................... 121
RESERVED REGISTERS – OFFSET 308h – 30Ch ............................................................................ 121
REPLAY AND ACKNOWLEDGE LATENCY TIMERS – OFFSET 310h ........................................... 121
RESERVED REGISTERS – OFFSET 314h – FFCh ........................................................................... 121
CONTROL AND STATUS REGISTERS FOR NON-TRANSPARENT BRIDGE MODE
122
7.6.1
7.6.2
7.6.3
7.6.4
7.6.5
7.6.6
7.6.7
7.6.8
7.6.9
RESERVED REGISTERS – OFFSET 000h TO 004h.......................................................................... 122
DOWNSTREAM MEMORY 2 TRANSLATED BASE REGISTER – OFFSET 008h ............................ 122
DOWNSTREAM MEMORY 2 SETUP REGISTER – OFFSET 00Ch.................................................. 122
DOWNSTREAM MEMORY 3 TRANSLATED BASE REGISTER – OFFSET 010h ............................ 122
DOWNSTREAM MEMORY 3 SETUP REGISTER – OFFSET 014h .................................................. 123
DOWNSTREAM MEMORY 3 UPPER 32-BIT SETUP REGISTER – OFFSET 018h ........................ 123
RESERVED REGISTERS – OFFSET 01Ch TO 030h ......................................................................... 123
UPSTREAM MEMORY 3 SETUP REGISTER – OFFSET 34h........................................................... 123
UPSTREAM MEMORY 3 UPPER 32-BIT SETUP REGISTER – OFFSET 038h............................... 124
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PI7C9X110
PCIe-to-PCI Reversible Bridge
7.6.10
7.6.11
7.6.12
7.6.13
7.6.14
7.6.15
7.6.16
7.6.17
7.6.18
7.6.19
7.6.20
7.6.21
7.6.22
7.6.23
7.6.24
7.6.25
7.6.26
7.6.27
7.6.28
7.6.29
7.6.30
7.6.31
7.6.32
7.6.33
7.6.34
7.6.35
7.6.36
7.6.37
RESERVED REGISTERS – OFFSET 03Ch TO 04Ch ........................................................................ 124
LOOKUP TABLE OFFSET – OFFSET 050h ..................................................................................... 124
LOOKUP TABLE DATA – OFFSET 054h.......................................................................................... 124
UPSTREAM PAGE BOUNDARY IRQ 0 REQUEST REGISTER – OFFSET 058h ............................ 125
UPSTREAM PAGE BOUNDARY IRQ 1 REQUEST REGISTER – OFFSET 05Ch............................ 125
UPSTREAM PAGE BOUNDARY IRQ 0 MASK REGISTER – OFFSET 060h ................................... 126
UPSTREAM PAGE BOUNDARY IRQ 1 MASK REGISTER – OFFSET 064h ................................... 126
RESERVED REGISTER – OFFSET 068C .......................................................................................... 126
PRIMARY CLEAR IRQ REGISTER – OFFSET 070h......................................................................... 126
SECONDARY CLEAR IRQ REGISTER – OFFSET 070h................................................................... 126
PRIMARY SET IRQ REGISTER – OFFSET 074h .............................................................................. 127
SECONDARY SET IRQ REGISTER – OFFSET 074h ........................................................................ 127
PRIMARY CLEAR IRQ MASK REGISTER – OFFSET 078h ............................................................. 127
SECONDARY CLEAR IRQ MASK REGISTER – OFFSET 078h ....................................................... 127
PRIMARY SET IRQ MASK REGISTER – OFFSET 07Ch .................................................................. 128
SECONDARY SET IRQ MASK REGISTER – OFFSET 07Ch ............................................................ 128
RESERVED REGISTERS – OFFSET 080h TO 09Ch ......................................................................... 128
SCRATCHPAD 0 REGISTER – OFFSET 0A0h.................................................................................. 128
SCRATCHPAD 1 REGISTER – OFFSET 0A4h.................................................................................. 128
SCRATCHPAD 2 REGISTER – OFFSET 0A8h.................................................................................. 129
SCRATCHPAD 3 REGISTER – OFFSET 0ACh ................................................................................. 129
SCRATCHPAD 4 REGISTER – OFFSET 0B0h.................................................................................. 129
SCRATCHPAD 5 REGISTER – OFFSET 0B4h.................................................................................. 129
SCRATCHPAD 6 REGISTER – OFFSET 0B8h.................................................................................. 129
SCRATCHPAD 7 REGISTER – OFFSET 0BCh ................................................................................. 130
RESERVED REGISTERS – OFFSET 0C0h TO 0FCh........................................................................ 130
LOOKUP TABLE REGISTERS – OFFSET 100h TO 1FCh ............................................................... 130
RESERVED REGISTERS – OFFSET 200h TO FFCh ........................................................................ 130
8
GPIO PINS AND SM BUS ADDRESS..................................................................................... 131
9
CLOCK SCHEME ..................................................................................................................... 132
10
INTERRUPTS......................................................................................................................... 132
11
EEPROM (I2C) INTERFACE AND SYSTEM MANAGEMENT BUS ........................... 132
11.1
11.2
EEPROM (I2C) INTERFACE .......................................................................................................................... 133
SYSTEM MANAGEMENT BUS..................................................................................................................... 133
12
HOT PLUG OPERATION .................................................................................................... 133
13
RESET SCHEME................................................................................................................... 133
14
IEEE 1149.1 COMPATIBLE JTAG CONTROLLER ....................................................... 134
14.1
14.2
14.3
14.4
14.5
INSTRUCTION REGISTER ............................................................................................................................ 134
BYPASS REGISTER........................................................................................................................................ 135
DEVICE ID REGISTER................................................................................................................................... 135
BOUNDARY SCAN REGISTER..................................................................................................................... 135
JTAG BOUNDARY SCAN REGISTER ORDER ........................................................................................... 135
15
POWER MANAGEMENT .................................................................................................... 138
16
ELECTRICAL AND TIMING SPECIFICATIONS........................................................... 140
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PI7C9X110
PCIe-to-PCI Reversible Bridge
16.1
16.2
16.3
ABSOLUTE MAXIMUM RATINGS .............................................................................................................. 140
DC SPECIFICATIONS..................................................................................................................................... 140
AC SPECIFICATIONS..................................................................................................................................... 141
17
PACKAGE INFORMATION................................................................................................ 142
18
ORDERING INFORMATION.............................................................................................. 143
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PI7C9X110
PCIe-to-PCI Reversible Bridge
TABLE OF FIGURES
FIGURE 1-1 PI7C9X110 TOPOLOGY ...................................................................................................................................... 14
FIGURE 4-1 FORWARD AND NON-TRANSPARENT BRIDGE MODE ............................................................................................ 22
FIGURE 4-2 REVERSE AND TRANSPARENT BRIDGE MODE ...................................................................................................... 23
FIGURE 16-1 PCI SIGNAL TIMING CONDITIONS ..................................................................................................................... 141
FIGURE 17-1 TOP VIEW DRAWING ......................................................................................................................................... 142
FIGURE 17-2 BOTTOM VIEW DRAWING.................................................................................................................................. 142
FIGURE 17-3 PACKAGE OUTLINE DRAWING........................................................................................................................... 143
LIST OF TABLES
TABLE 2-1 PIN ASSIGNMENTS ................................................................................................................................................. 19
TABLE 3-1 MODE SELECTION ................................................................................................................................................. 21
TABLE 3-2 PIN STRAPPING ...................................................................................................................................................... 21
TABLE 5-1 NON-TRANSPARENT REGISTERS ............................................................................................................................ 25
TABLE 6-1 TLP FORMAT ........................................................................................................................................................ 26
TABLE 7-1 CONFIGURATION REGISTER MAP (00H – FFH) ...................................................................................................... 27
TABLE 7-2 PCI EXPRESS EXTENDED CAPABILITY REGISTER MAP (100H – FFFH) ................................................................. 30
TABLE 7-3 CONTROL AND STATUS REGISTER (CSR) MAP (000H – FFFH) ............................................................................. 31
TABLE 8-1 SM BUS DEVICE ID STRAPPING .......................................................................................................................... 131
TABLE 10-1 PCIE INTERRUPT MESSAGE TO PCI INTERRUPT MAPPING IN REVERSE BRIDGE MODE......................................... 132
TABLE 10-2 PCI INTERRUPT TO PCIE INTERRUPT MESSAGE MAPPING IN FORWARD BRIDGE MODE ....................................... 132
TABLE 14-1 INSTRUCTION REGISTER CODES ......................................................................................................................... 135
TABLE 14-2 JTAG DEVICE ID REGISTER .............................................................................................................................. 135
TABLE 14-3 JTAG BOUNDARY SCAR REGISTER DEFINITION ................................................................................................. 135
TABLE 16-1 ABSOLUTE MAXIMUM RATINGS ......................................................................................................................... 140
TABLE 16-2 DC ELECTRICAL CHARACTERISTICS .................................................................................................................. 140
TABLE 16-3 PCI BUS TIMING PARAMETERS .......................................................................................................................... 141
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PCIe-to-PCI Reversible Bridge
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April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
1
INTRODUCTION
PI7C9X110 is a PCIe-to-PCI bridge. PI7C9X110 is compliant with the PCI Express Base Specification, Revision
1.0a, the PCI Express Card Electromechanical Specification, Revision 1.0a, the PCI Local Bus Specification,
Revision 3.0 and PCI Express to PCI Bridge Specification, Revision 1.0. PI7C9X110 supports transparent and
non-transparent mode of operations. Also, PI7C9X110B supports forward and reverse bridging. In forward bridge
mode, PI7C9X110 has an x1 PCI Express upstream port and a 32-bit PCI downstream port. The 32-bit PCI
downstream port is 66MHz capable (see figure 1-1). In reverse bridge mode, PI7C9X110 has a 32-bit PCI
upstream port and an x1 PCI Express downstream port. PI7C9X110 configuration registers are backward
compatible with existing PCI bridge software and firmware. No modification of PCI bridge software and firmware
is needed for the original operation.
Figure 1-1 PI7C9X110 Topology
Tx
Rx
x1 PCI Express Port
PI7C9X110
PCI 32bit / 66MHz Bus
PCI
Device
1.1
PCI
Device
PCI
Device
PCI
Device
PCI
Device
PCI
Device
PCI
Device
PCI
Device
PCI EXPRESS FEATURES
•
•
•
•
•
•
•
•
•
•
•
Compliant with PCI Express Base Specification, Revision 1.0a
Compliant with PCI Express Card Electromechanical Specification, Revision 1.0a
Compliant with PCI Express to PCI Bridge Specification, Revision 1.0
Physical Layer interface (x1 link with 2.5Gb/s data rate)
Lane polarity toggle
Virtual Isochronous support (upstream TC1-7 generation, downstream TC1-7 mapping)
ASPM support
Beacon support
CRC (16-bit), LCRC (32-bit)
ECRC and advanced error reporting
PRBS (Pseudo Random Bit Sequencing) generator/checker for chip testing
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April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
•
1.2
PCI FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
1.3
Maximum payload size to 512 bytes
Compliant with PCI Local Bus Specification, Revision 3.0
Compliant with PCI-to-PCI Bridge Architecture Specification, Revision 1.2
Compliant with PCI Bus PM Interface Specification, Revision 1.1
Compliant with PCI Hot-Plug Specification, Revision 1.1
Compliant with PCI Mobile Design Guide, Version 1.1
PME support
3.3V PCI signaling with 5V I/O tolerance
Provides two level arbitration support for eight PCI Bus masters
16-bit address decode for VGA
Subsystem Vendor and Subsystem Device IDs support
Capable of supporting minimum PCI Frequency of 10MHz
PCI INT interrupt or MSI Function support
GENERAL FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Compliant with Advanced Configuration and Power Interface Specification (ACPI), Revision 2.0b
Compliant with System Management (SM) Bus, Version 2.0
Forward bridging (PCI Express as primary bus, PCI as secondary bus)
Reverse bridging (PCI as primary bus, PCI Express as secondary bus)
Transparent mode support
Non-transparent mode Support
GPIO support (4 bi-directional pins)
Power Management (including ACPI, CLKRUN_L, PCI_PM)
Masquerade Mode (pre-loadable vendor, device, and revision IDs)
EEPROM (I2C) Interface
SM Bus Interface
Auxiliary powers (VAUX, VDDAUX, VDDCAUX) support
Power consumption at about 1.0 Watt in typical condition
Extended commercial/industrial temperature range (-40C to 85C)
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PI7C9X110
PCIe-to-PCI Reversible Bridge
2
PIN DEFINITIONS
2.1
SIGNAL TYPES
TYPE OF SIGNAL - DESCRIPTIONS
B
I
IU
ID
IOD
OD
O
P
G
2.2
Bi-directional
Input
Input with pull-up
Input with pull-down
Bi-directional with open drain output
Open drain output
Output
Power
Ground
PCI EXPRESS SIGNALS
NAME
REFCLKP
REFCLKN
RP
RN
TP
TN
RREF
PIN ASSIGNMENT
E3,
E2
G4,
H4
G1,
F1
H3
PERST_L
L3
TYPE
I
I
DESCRIPTION
Reference Clock Inputs: Connect to external 100MHz differential clock. These
signals require AC coupled with 0.1uF capacitors.
PCI Express data inputs: Differential data receiver input signals
O
PCI Express data outputs: Differential data transmitter output signals
I
Resistor Reference: It is used to connect an external resistor (2.1K Ohm +/- 1%) to
VSS to provide a reference current for the driver and equalization circuit.
PCI Express Fundamental Reset: PI7C9X110B uses this reset to initialize the
internal state machines.
I
2.3 PCI SIGNALS
NAME
AD [31:0]
CBE [3:0]
PIN ASSIGNMENT
B3, A4, B4, D4, A5,
C5, D5, B6, A7, B7,
D7, A8, C8, D8, B9,
C9, C12, D14, D12,
D11, E13, F14, F13,
F11, G12, G11, H13,
H12, J14, J13, J11,
K14
C6, A10, C14, G14
TYPE
B
PAR
B13
B
FRAME_L
B10
B
B
DESCRIPTION
Address / Data: Multiplexed address and data bus. Address phase is aligned with
first clock of FRAME_L assertion. Data phase is aligned with IRDY_L or TRDY_L
assertion. Data is transferred on rising edges of FBCLKIN when both IRDY_L and
TRDY_L are asserted. During bus idle (both FRAME_L and IRDY_L are deasserted), PI7C9X110B drives AD to a valid logic level when arbiter is parking to
PI7C9X110B on PCI bus.
Command / Byte Enables (Active LOW): Multiplexed command at address phase
and byte enable at data phase. During address phase, the initiator drives commands on
CBE [3:0] signals to start the transaction. If the command is a write transaction, the
initiator will drive the byte enables during data phase. Otherwise, the target will drive
the byte enables during data phase. During bus idle, PI7C9X110B drives CBE [3:0]
signals to a valid logic level when arbiter is parking to PI7C9X110B on PCI bus.
Parity Bit: Parity bit is an even parity (i.e. even number of 1’s), which generates
based on the values of AD [31:0], CBE [3:0]. If PI7C9X110B is an initiator with a
write transaction, PI7C9X110B will tri-state PAR. If PI7C9X110B is a target and a
write transaction, PI7C9X110B will drive PAR one clock after the address or data
phase. If PI7C9X110B is a target and a read transaction, PI7C9X110B will drive
PAR one clock after the address phase and tri-state PAR during data phases. PAR is
tri-stated one cycle after the AD lines are tri-stated. During bus idle, PI7C9X110B
drives PAR to a valid logic level when arbiter is parking to PI7C9X110B on PCI bus.
FRAME (Active LOW): Driven by the initiator of a transaction to indicate the
beginning and duration an access. The de-assertion of FRAME_L indicates the final
data phase signaled by the initiator in burst transfers. Before being tri-stated, it is
driven to a de-asserted state for one cycle.
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PI7C9X110
PCIe-to-PCI Reversible Bridge
NAME
IRDY_L
PIN ASSIGNMENT
D10
TYPE
B
TRDY_L
A11
B
DEVSEL_L
B11
B
STOP_L
A12
B
LOCK_L
A13
B
IDSEL
N14
I
PERR_L
A14
B
SERR_L
B14
IOD
REQ_L [7:0]
P2, P1, N3, N2, N1,
M3, M2, M1
I
GNT_L [7:0]
N6, P6, P5, N5, M5,
L5, N4, M4
O
CLKOUT [8:0]
O
RESET_L
N12, P12, N11, L10,
M10, P10, L9, N9, P9
N7
INTA_L
INTB_L
INTC_L
INTD_L
P3
M6
P13
N13
IOD
FBCLKIN
C2
I
CLKIN
P7
I
B
DESCRIPTION
IRDY (Active LOW): Driven by the initiator of a transaction to indicate its ability to
complete current data phase on the primary side. Once asserted in a data phase, it is
not de-asserted until the end of the data phase. Before tri-stated, it is driven to a deasserted state for one cycle.
TRDY (Active LOW): Driven by the target of a transaction to indicate its ability to
complete current data phase on the primary side. Once asserted in a data phase, it is
not de-asserted until the end of the data phase. Before tri-stated, it is driven to a deasserted state for one cycle.
Device Select (Active LOW): Asserted by the target indicating that the device is
accepting the transaction. As a master, PI7C9X110 waits for the assertion of this
signal within 5 cycles of FRAME_L assertion; otherwise, terminate with master
abort. Before tri-stated, it is driven to a de-asserted state for one cycle.
STOP (Active LOW): Asserted by the target indicating that the target is requesting
the initiator to stop the current transaction. Before tri-stated, it is driven to a deasserted state for one cycle.
LOCK (Active LOW): Asserted by the initiator for multiple transactions to
complete. PI7C9X110B does not support any upstream LOCK transaction.
Initialization Device Select: Used as a chip select line for Type 0 configuration
access to bridge’s configuration space.
Parity Error (Active LOW): Asserted when a data parity error is detected for data
received on the PCI bus interface. Before being tri-stated, it is driven to a de-asserted
state for one cycle.
System Error (Active LOW): Can be driven LOW by any device to indicate a
system error condition. If SERR control is enabled, PI7C9X110B will drive this pin
on:
Address parity error
Posted write data parity error on target bus
Master abort during posted write transaction
Target abort during posted write transaction
Posted write transaction discarded
Delayed write request discarded
Delayed read request discarded
Delayed transaction master timeout
Errors reported from PCI Express port (advanced error reporting) in transparent
mode.
This signal is an open drain buffer that requires an external pull-up resistor for proper
operation.
Request (Active LOW): REQ_L’s are asserted by bus master devices to request for
transactions on the PCI bus. The master devices de-assert REQ_Ls for at least 2 PCI
clock cycles before asserting them again. If external arbiter is selected (CFN_L=1),
REQ_L [0] will be the bus grant input to PI7C9X110. Also, REQ_L [5:2] will
become the GPI [3:0].
Grant (Active LOW): PI7C9X110 asserts GNT_Ls to release PCI bus control to bus
master devices. During idle and all GNT_Ls are de-asserted and arbiter is parking to
PI7C9X110, PI7C9X110 will drive AD, CBE, and PAR to valid logic levels. If
external arbiter is selected (CFN_L=1), GNT_L [0] will be the bus request from
PI7C9X110 to external arbiter. Also, GNT_L [5:2] will become the GPO [3:0].
PCI Clock Outputs: PCI clock outputs are derived from the CLKIN and provide
clocking signals to external PCI Devices.
RESET_L (Active LOW): When RESET_L active, all PCI signals should be
asynchronously tri-stated.
Interrupt: Signals are asserted to request an interrupt. After asserted, it can be
cleared by the device driver. INTA_L, INTB_L, INTC_L, INTD_L signals are inputs
and asynchronous to the clock in the forward mode. In reverse mode, INTA_L,
INTB_L, INTC_L, and INTD_L are open drain buffers for sending interrupts to the
host interrupt controller.
Feedback Clock Input: It connects to one of the CLKOUT [8:0] Output Signals and
provides internal clocking to PI7C9X110 PCI bus interface.
PCI Clock Input: PCI Clock Input Signal connects to an external clock source.
PI7C9X110 supports various PCI Frequency from 10MHz to 66MHz. The PCI Clock
Outputs CLKOUT [8:0] pins are derived from CLKIN Input.
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PI7C9X110
PCIe-to-PCI Reversible Bridge
2.4
2.5
2.6
MODE SELECT AND STRAPPING SIGNALS
NAME
TM2
PIN ASSIGNMENT
K3
TYPE
I
TM1
C1
I
TM0
D1
I
MSK_IN
P14
I
REVRSB
M12
I
CFN_L
M7
ID
DESCRIPTION
Mode Select 2: TM2 is a strapping pin. When TM2 is strapped low for normal
operations and strapped high for testing functions. See table 3-1 for mode selection
and 3-2 for strapping control for details.
Mode Select 1: Mode Selection Pin to select EEPROM or SM Bus. TM1=0 for
EEPROM (I2C) support and TM1=1 for SM Bus support. TM1 is also a strapping
pin. See table 3-1 mode selection and 3-2 for strapping control.
Mode Select 0: Mode Selection Pin to select transparent or non-transparent mode.
TM0=0 for transparent bridge function mode and TM0=1 for non-transparent bridge
function mode. TM0 is also a strapping pin. See table 3-1 for mode selection and 3-2
for strapping control.
Mask Input for CLKOUT: MSK_IN is used by PI7C9X110 to enable or disable the
clock outputs. MSK_IN is also a strapping pin. When it is strapped to high, hot-plug
is enabled. See table 3-2 for strapping control.
Forward or Reverse Bridging Pin: REVRSB pin controls the Forward
(REVRSB=0) or Reverse (REVRSB=1) Bridge Mode of PI7C9X110. This pin is also
a strapping pin. See table 3-1 for mode selection.
Bus Central Function Control Pin (Active Low): To enable the internal arbiter,
CFN_L pin should be tied low. When it’s tied high, an external arbiter is required to
arbitrate the bus. In external arbiter mode, REQ_L [0] is re-configured to be the
secondary bus grant input, and GNT_L [0] is reconfigured to be the secondary bus
request output. Also, REQ_L [5:2] and GNT_L [5:2] become GPI [3:0] and GPO
[3:0] respectively if external arbiter is selected. CFN_L has a weak internal pull-down
resistor. See table 3-1 for mode selection.
JTAG BOUNDARY SCAN SIGNALS
NAME
TCK
PIN ASSIGNMENT
L14
TYPE
IU
TMS
TDO
L13
M13
IU
O
TDI
M14
IU
TRST_L
K11
IU
DESCRIPTION
Test Clock: TCK is the test clock to synchronize the state information and data on
the PCI bus side of PI7C9X110 during boundary scan operation.
Test Mode Select: TMS controls the state of the Test Access Port (TAP) controller.
Test Data Output: TDO is the test data output and connects to the end of the JTAG
scan chain.
Test Data Input: TDI is the test data input and connects to the beginning of the
JTAG scan chain. It allows the test instructions and data to be serially shifted into the
PCI side of PI7C9X110.
Test Reset (Active LOW): TRST_L is the test reset to initialize the Test Access Port
(TAP) controller.
MISCELLANEOUS SIGNALS
NAME
GPIO [3:0]
PIN ASSIGNMENT
L7, P8, M8, L8
TYPE
B
SMBCLK /
SCL
A2
B
SMBDATA /
SDA
A1
B/IOD
PME_L
A3
B
CLKRUN_L
D3
B
DESCRIPTION
General Purpose I/O Data Pins: The 4 general-purpose signals are programmable as
either input-only or bi-directional signals by writing the GPIO output enable control
register in the configuration space. See Chapter 8 for more information.
SMBUS / EEPROM Clock Pin: When EEPROM (I2C) interface is selected
(TM1=0), this pin is an output of SCL clock and connected to EEPROM clock input.
When SMBUS interface is selected (TM1=1), this pin is an input for the clock of
SMBUS.
SMBUS / EEPROM Data Pin: Data Interface Pin to EERPOM or SMBUS. When
EEPROM (I2C) interface is selected (TM1=0), this pin is a bi-directional signal.
When SMBUS interface is selected (TM1=1), this pin is an open drain signal.
Power Management Event Pin: Power Management Event Signal is asserted to
request a change in the device or link power state.
Clock Run Pin (Active LOW): The Clock Run signal, for mobile environment, is
asserted and de-asserted to indicate the status of the PCI Clock.
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PI7C9X110
PCIe-to-PCI Reversible Bridge
2.7
NAME
Reserved 0
PIN ASSIGNMENT
B1
Reserved 1
D2
DESCRIPTION
Reserved 0 Pin: For normal PCI operation, Reserved 0 pin is tied to ground with a
capacitor (0.1uF) in parallel.
Reserved 1 Pull-up driver: Don’t care.
O
POWER AND GROUND PINS
NAME
VDDA
PIN ASSIGNMENT
J3, G3
VDDP
F3, F4, K2
P
VDDAUX
F2
P
VTT
G2, K1
P
VDDA_PLL
J4
P
VDDC
L1, N8, L11, L12,
B12, C10, E4
L2
L4, N10, M11, K12,
J12, H14, F12, E11,
D13, A9, C7, A6, C4
B2
P
VDDCAUX
VD33
VAUX
VSS
VDDA
2.8
TYPE
I
E1, H1, H2, J2, J1,
K4, P4, L6, M9, P11,
K13, H11, G13, E12,
E14, C13, C11, D9,
B8, D6, B5, C3
J3, G3
TYPE
P
DESCRIPTION
Analog Voltage Supply for PCI Express Interface: Connect to the 1.8V Power
Supply.
Digital Voltage Supply for PCI Express Interface: Connect to the 1.8V Power
Supply.
Auxiliary Voltage Supply for PCI Express Interface: Connect to the 1.8V Power
Supply.
Termination Supply Voltage for PCI Express Interface: Connect to the 1.8V
Power Supply.
Analog Voltage Supply for PLL at PCI Interface: Connect to the 1.8V Power
Supply.
Core Supply Voltage: Connect to the 1.8V Power Supply.
P
P
Auxiliary Core Supply Voltage: Connect to the 1.8V Power Supply.
I/O Supply Voltage for PCI Interface: Connect to the 3.3V Power Supply for PCI
I/O Buffers.
P
Auxiliary I/O Supply Voltage for PCI interface: Connect to the 3.3V Power
Supply.
Ground: Connect to Ground.
P
P
Analog Voltage Supply for PCI Express Interface: Connect to the 1.8V Power
Supply.
PIN ASSIGNMENTS
Table 2-1 Pin Assignments
PIN
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
B1
B2
B3
B4
B5
B6
B7
NAME
SMBDAT / SDA
SMBCLK / SCL
PME_L
AD [30]
AD [27]
VD33
AD [23]
AD [20]
VD33
CBE [2]
TRDY_L
STOP_L
LOCK_L
PERR_L
Reserved 0
VAUX
AD [31]
AD [29]
VSS
AD [24]
AD [22]
PIN
C13
C14
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
E1
E2
E3
E4
E11
NAME
VSS
CBE [1]
TM0
Reserved 1
CLKRUN_L
AD [28]
AD [25]
VSS
AD [21]
AD [18]
VSS
IRDY_L
AD [12]
AD [13]
VD33
AD [14]
VSS
REFCLKN
REFCLKP
VDDC
VD33
PIN
H1
H2
H3
H4
H11
H12
H13
H14
J1
J2
J3
J4
J11
J12
J13
J14
K1
K2
K3
K4
K11
NAME
VSS
VSS
RREF
RN
VSS
AD [4]
AD [5]
VD33
VSS
VSS
VDDA
VDDA_PLL
AD [1]
VD33
AD [2]
AD [3]
VTT
VDDP
TM2
VSS
TRST_L
PIN
M3
M4
M5
M6
M7
M8
M9
M10
M11
M12
M13
M14
N1
N2
N3
N4
N5
N6
N7
N8
N9
NAME
REQ_L[2]/GPI[0]
GNT_L [0]
GNT_L[3]/GPO[1]
INTB_L
CFN_L
GPIO [1]
VSS
CLKOUT [4]
VD33
REVRSB
TDO
TDI
REQ_L[3] / GPI[1]
REQ_L[4] / GPI[2]
REQ_L[5] / GPI[3]
GNT_L [1]
GNT_L[4]/GPO[2]
GNT_L [7]
RESET_L
VDDC
CLKOUT [1]
Page 19 of 144
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April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
PIN
B8
B9
B10
B11
B12
B13
B14
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
NAME
VSS
AD [17]
FRAME_L
DEVSEL_L
VDDC
PAR
SERR_L
TM1
FBCLKIN
VSS
VD33
AD [26]
CBE [3]
VD33
AD [19]
AD [16]
VDDC
VSS
AD [15]
PIN
E12
E13
E14
F1
F2
F3
F4
F11
F12
F13
F14
G1
G2
G3
G4
G11
G12
G13
G14
NAME
VSS
AD [11]
VSS
TN
VDDAUX
VDDP
VDDP
AD [8]
VD33
AD [9]
AD [10]
TP
VTT
VDDA
RP
AD [6]
AD [7]
VSS
CBE [0]
PIN
K12
K13
K14
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
L11
L12
L13
L14
M1
M2
NAME
VD33
VSS
AD [0]
VDDC
VDDCAUX
PERST_L
VD33
GNT_L[2]/GPO[0]
VSS
GPIO [3]
GPIO [0]
CLKOUT [2]
CLKOUT [5]
VDDC
VDDC
TMS
TCK
REQ_L [0]
REQ_L [1]
PIN
N10
N11
N12
N13
N14
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
P14
NAME
VD33
CLKOUT [6]
CLKOUT [8]
INTD_L
IDSEL
REQ_L [6]
REQ_L [7]
INTA_L
VSS
GNT_L[5]/GPO[3]
GNT_L [6]
CLKIN
GPIO [2]
CLKOUT [0]
CLKOUT [3]
VSS
CLKKOUT [7]
INTC_L
MSK_IN
Page 20 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
3
MODE SELECTION AND PIN STRAPPING
3.1
FUNCTIONAL MODE SELECTION
If TM2 is strapped to low, PI7C9X110 uses TM1, TM0, CFN_L, and REVRSB pins to select different modes of
operations. These four input signals are required to be stable during normal operation. One of the sixteen
combinations of normal operation can be selected by setting the logic values for the four mode select pins. For
example, if the logic values are low for all four (TM1, TM0, CFN_L, and REVRSB) pins, the normal operation will
have EEPROM (I2C) support in transparent mode with internal arbiter in forward bridge mode. The designated
operation with respect to the values of the TM1, TM0, CFN_L, and REVRSB pins are defined on Table 3-1:
Table 3-1 Mode Selection
TM2 Strapped
0
0
0
0
0
0
0
0
3.2
TM1
0
1
X
X
X
X
X
X
TM0
X
X
0
1
X
X
X
X
CFN_L
X
X
X
X
0
1
X
X
REVRSB
X
X
X
X
X
X
0
1
Functional Mode
EEPROM (I2C) support
SM Bus support
Transparent mode
Non-Transparent mode
Internal arbiter
External arbiter
Forward bridge mode
Reverse bridge mode
PIN STRAPPING
If TM2 is strapped to high, PI7C9X110 uses TM1, TM0, and MSK_IN as strapping pins. The strapping functions
are listed in Table 3-2 to show the states of operations during the PCI Express PERST_L de-assertion transition in
forward bridge mode or PCI RESET_L de-assertion transition in reverse bridge mode.
Table 3-2 Pin Strapping
TM2 Strapped
1
1
4
TM1 Strapped
0
0
TM0 Strapped
0
1
MSK_IN Strapped
1
1
1
1
1
1
1
1
0
0
0
1
0
1
1
1
0
0
1
1
1
1
0
1
0
0
Test Functions
PLL test
Shorten initialization test with hotplug enabled
Functional loopback test
Bridge test (PRBS, IDDQ, etc.)
Reserved
Shorten initialization test with hotplug disabled
Reserved
Reserved
FORWARD AND REVERSE BRIDGING
PI7C9X110 supports forward or reverse and transparent or non-transparent combination modes of operation. For
example, when PI7C9X110 is operating in forward (REVRSB=0) and non-transparent bridge mode (TM0=1) shown
in Figure 4-1, its PCI Express interface is connected to a root complex and its PCI bus interface is connected to PCI
devices. Another example, PI7C9X110 can be configured as a reverse (REVRSB=1) and transparent (TM0=0)
bridge shown in Figure 4-2.
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April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
The non-transparent bridge feature of PI7C9X110 allows the I/O Processor to be isolated from the Host Processor
and its memory map which avoiding memory address conflict when both host and I/O processors are needed sideby-side.
PCI based systems and peripherals are ubiquitous in the I/O interconnect technology market today. It will be a
tremendous effort to convert existing PCI based products to be used in PCI Express systems. PI7C9X110 provides
a solution to bridge existing PCI based products to the latest PCI Express technology.
Figure 4-1 Forward and Non-transparent Bridge Mode
Host
Processor
System
Memory
Root
Complex
x1 link
PI7C9X110
32bit / 66MHz
Local
Memory
Local
Processor
Fibre
Channel
Fast
Ethernet
SCSI
In reverse (REVRSB=1) and transparent (TM0=0) mode shown in Figure 3-2, PI7C9X110 becomes a PCI-to-PCI
Express bridge that its PCI bus interface is connected to the host chipset between and the PCI Express x1 link. It
enables the legacy PCI Host Systems to provide PCI Express capability.
PI7C9X110 provides a solution to convert existing PCI based designs to adapt quickly into PCI Express base
platforms. Existing PCI based applications will not have to undergo a complete re-architecture in order to interface
to PCI Express technology.
Page 22 of 144
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April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
Figure 4-2 Reverse and Transparent Bridge Mode
Host
Processor
System
Memory
Chipset
32bit / 66MHz
Fibre
Channel
PI7C9X110
Fast
Ethernet
SCSI
x1 link
Page 23 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
5
TRANSPARENT AND NON-TRANSPARENT BRIDGING
5.1
TRANSPARENT MODE
In transparent bridge mode, base class code of PI7C9X110 is set to be 06h (bridge device). The sub-class code is
set to be 04h (PCI-to-PCI bridge). Programming interface is 00h. Hence, PI7C9X110 is not a subtractive decoding
bridge.
PI7C9X110 has type-1 configuration header if TM0 is set to 0 (transparent bridge mode). These configuration
registers are the same as traditional transparent PCI-to-PCI Bridge. In fact, it is backward compatible to the
software that supporting traditional transparent PCI-to-PCI bridges. Configuration registers can be accessed from
several different ways. For PCI Express access, PCI Express configuration transaction is in forward bridge mode.
For PCI access, PCI configuration cycle is mainly in reverse bridge mode. However, PI7C9X110 allows PCI
configuration access in forward mode as secondary bus configuration access. For I2C access, I2C bus protocol is
used with EEPROM selected (TM1=0). For SM bus access, SM bus protocol is used with SM bus selected
(TM1=1).
5.2
NON-TRANSPARENT MODE
In non-transparent bridge mode, base class code of PI7C9X110 is set to be 06h (bridge device). The sub-class code
is set to be 80h (other bridge). Programming interface is 00h. Hence, PI7C9X110 is not a subtractive decoding
bridge.
PI7C9X110 has type-0 configuration header if TM0 is set to 1 (non-transparent mode). The configuration registers
are similar to a traditional PCI device. However, there is one set of configuration registers for the primary interface
and another set of configuration registers for the secondary interface. In addition, CSRs (Control and Status
Registers) are implemented to support the memory or IO transfers between the primary and secondary buses. The
CSRs are accessed through memory transaction access within the lowest memory range of 4K Space (bit [64:12] are
zeros). The non-transparent configuration registers can be accessed through several different ways (PCI Express,
PCI, I2C, and SM bus). For PCI Express and PCI access, the type-0 configuration transactions need to be used. For
I2C access, I2C bus protocol needs to be used through I2C bus interface. For SM bus access, SM bus protocol
needs to be used through SM bus interface. The hardware pins (A2 and A1) are shared for I2C and SM bus
interface. If TM1=0, pin A2 and A1 will be SCL and SDA for I2C interface respectively. If TM1=1, pin A2 and
A1 will be SMBCLK and SMBDATA for SM Bus interface respectively.
In non-transparent bridge mode, PI7C9X110 supports four or three memory BARs (Base Address Registers) and
one or two IO BARs (Base Address Registers) depending on selection on the primary bus. Also, PI7C9X110
supports four or three memory BARs (Base Address Registers) and one or two IO BARs (Base Address Registers)
depending on selection on the secondary bus.
Offset 10h is defined to be primary CSR and downstream memory 0 BAR. Offset 14h is defined to be primary CSR
and downstream IO BAR. Offset 18h is defined to be downstream memory 1 or IO BAR (selectable by CSR setup
register). Offset 1Ch is defined to be downstream memory 2 BAR. Offset 20h and 24h are defined to be
downstream memory 3 lower BAR and memory 3 upper BAR respectively to support 64-bit decoding.
The direct offset translation of address from primary to secondary bus will be done by substituting the original Base
Address at primary with the downstream Translation Base Address Register values and keeping the lower address
bits the same to form a new address for forward the transaction to secondary bus.
For downstream memory 2, it uses direct address translation. There is no lookup table for downstream memory
address translation.
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PI7C9X110
PCIe-to-PCI Reversible Bridge
Offset 50h is defined to be secondary CSR and upstream memory 0 BAR. Offset 54h is defined to be secondary
CSR and upstream IO BAR. Offset 58h is defined to be upstream memory 1 or IO BAR (selectable by CSR setup
register offset E4h). Offset 1Ch is defined to be upstream memory 2 BAR. Offset 60h and 64h are defined to be
upstream memory 3 lower BAR and memory 3 upper BAR respectively to support 64-bit decoding.
The direct offset translation of address from secondary to primary bus will be done by substituting the original Base
Address at secondary with the upstream Translation Base Address Register values and keeping the lower address
bits the same to form a new address for forward the transaction to primary bus.
For upstream memory 2, it uses lookup table address translation method which using the original base address as
index to select a new address on the upstream memory 2 lookup table based on the page and window size defined.
Table 5-1 Non-transparent Registers
Non-transparent Registers
Primary CSR and Memory 0 BAR
Downstream Memory 0 Translated Base
Downstream Memory 0 Setup
Downstream I/O or Memory 1 BAR
Downstream I/O or Memory 1 Translated Base
Downstream I/O or Memory 1 Setup
Downstream Memory 2 BAR
Downstream Memory 2 Translated Base
Downstream Memory 2 Setup
Downstream Memory 3 BAR
Downstream Memory 3 Upper 32-bit BAR
Downstream Memory 3 Translated Base
Downstream Memory 3 Setup
Downstream Memory 3 Upper 32-bit Setup
Secondary CSR Memory 0 BAR
Upstream Memory 0 Translated Base
Upstream Memory 0 Setup
Secondary CSR I/O BAR
Upstream I/O or Memory 1 BAR
Upstream I/O or Memory 1 Translated Base
Upstream I/O or Memory 1 Setup
Upstream Memory 2 BAR
Upstream Memory 2 Lookup Table Offset
Upstream Memory 2 Lookup Table Data
Upstream Memory 2 Lookup Table (64 32-bit entries)
Upstream Memory 3 BAR
Upstream Memory 3 Upper 32-bit BAR
Upstream Memory 3 Setup
Upstream Memory 3 Upper 32-bit Setup
Typical access
Configuration access offset 10h
Configuration access offset 98h
Configuration access offset 9Ch
Configuration access offset 18h
Configuration access offset A8h
Configuration access offset ACh
Configuration access offset 1Fh
Lower 4K I/O or Memory access offset 008h
Lower 4K I/O or Memory access offset 00Ch
Configuration access offset 23h
Configuration access offset 27h
Lower 4K I/O or Memory access offset 010h
Lower 4K I/O or Memory access offset 014h
Lower 4K I/O or Memory access offset 018h
Configuration access offset 50h
Configuration access offset E0h
Configuration access offset E4h
Configuration access offset 54h
Configuration access offset 58h
Configuration access offset E8h
Configuration access offset ECh
Configuration access offset 5Fh
Lower 4K I/O or Memory access offset 050h
Lower 4K I/O or Memory access offset 054h
Lower 4K I/O or Memory access offset 100h to 1FFh
Configuration access offset 63h
Configuration access offset 67h
Lower 4K I/O or Memory access offset 34h
Lower 4K I/O or Memory access offset 38h
Page 25 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
6
PCI EXPRESS FUNCTIONAL OVERVIEW
6.1
TLP STRUCTURE
PCI Express TLP (Transaction Layer Packet) Structure is comprised of format, type, traffic class, attributes, TLP
digest, TLP poison, and length of data payload.
There are four TLP formats defined in PI7C9X110 based on the states of FMT [1] and FMT [0] as shown on Table
6-1.
Table 6-1 TLP Format
FMT [1]
0
0
1
1
FMT [0]
0
1
0
1
TLP Format
3 double word, without data
4 double word, without data
3 double word, with data
4 double word, with data
Data payload of PI7C9X110 can range from 4 (1DW) to 256 (64DW) bytes. PI7C9X110 supports three TLP
routing mechanisms. They are comprised of Address, ID, and Implicit routings. Address routing is being used for
Memory and IO requests. ID based (bus, device, function numbers) routing is being used for configuration
requests. Implicit routing is being used for message routing. There are two message groups (baseline and advanced
switching). The baseline message group contains INTx interrupt signaling, power management, error signaling,
locked transaction support, slot power limit support, vendor defined messages, hot-plug signaling. The other is
advanced switching support message group. The advanced switching support message contains data packet and
signal packet messages. Advanced switching is beyond the scope of PI7C9X110 implementation.
The r [2:0] values of the "type" field will determine the destination of the message to be routed. All baseline
messages must use the default traffic class zero (TC0).
6.2
VIRTUAL ISOCHRONOUS OPERATION
This section provides a summary of Virtual Isochronous Operation supported by PI7C9X110. Virtual Isochronous
support is disabled by default. Virtual Isochronous feature can be turned on with setting bit [26] of offset 40h to
one. Control bits are designated for selecting which traffic class (TC1-7) to be used for upstream (PCI Express-toPCI). PI7C9X110 accepts only TC0 packets of configuration, IO, and message packets for downstream (PCI
Express-to-PCI). If configuration, IO and message packets have traffic class other than TC0, PI7C9X110 will treat
them as malformed packets. PI7C9X110 maps all downstream memory packets from PCI Express to PCI
transactions regardless the virtual Isochronous operation is enabled or not.
7
CONFIGURATION REGISTERS
PI7C9X110 supports Type-0 (non-transparent bridge mode) and Type-1 (transparent bridge mode) configuration
space headers and Capability ID of 01h (PCI power management) to 10h (PCI Express capability structure).
With pin REVRSB = 0, device-port type (bit [7:4]) of capability register will be set to 7h (PCI Express-to-PCI
bridge). When pin REVRSB = 1, device-port type (bit [7:4]) of capability register will be set to 8h (PCI-to-PCI
Express bridge).
PI7C9X110 supports PCI Express capabilities register structure with capability version set to 1h (bit [3:0] of offset
02h).
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PI7C9X110
PCIe-to-PCI Reversible Bridge
When pin TM0=0, PI7C9X110 will be in transparent bridge mode and the configuration registers for transparent
bridge should be used.
When pin TM0=1, PI7C9X110 will be in non-transparent bridge mode and the configuration registers for nontransparent bridge should be used.
7.1
CONFIGURATION REGISTER MAP
PI7C9X110 supports capability pointer with (ID=07h), PCI power management (ID=01h), PCI bridge sub-system
vendor ID (ID=0Dh), PCI Express (ID=10h), vital product data (ID=03h), and message signaled interrupt (ID=05h).
Slot identification (ID=04h) is off by default and can be turned on through configuration programming.
Table 7-1 Configuration Register Map (00h – FFh)
Primary Bus
Configuration Access
for both Transparent
and Non-Transparent
mode, or Secondary
Bus Configuration
Access for Transparent
Mode
01h - 00h
03h – 02h
05h – 04h
Secondary Bus
Configuration Access
for Non-Transparent
Mode Only
Transparent Mode
(type1)
Non-Transparent
Mode (Type0)
EEPROM
(I2C)
Access
SM Bus
Access
01h – 00h
03h – 02h
45h – 44h
Vendor ID
Device ID
Command Register
Yes1
Yes1
No
Yes5
Yes5
Yes
07h – 06h
47h – 46h
No
Yes
0Bh – 08h
0Bh – 08h
Yes1
Yes5
0Ch
4Ch
-
-
0Dh
0Eh
0Fh
13h – 10h
4Dh
4Eh
4Fh
53h – 50h
Primary Status
Register
Class Code and
Revision ID
Cacheline Size
Register
Primary Latency Timer
Header Type Register
Reserved
Reserved
No
No
No
Yes
Yes
Yes
17h – 14h
18h
57h – 54h
58h
No
No
Yes
Yes
19h
59h
No
Yes
1Ah
5Ah
No
Yes
1Bh
5Bh
No
Yes
1Ch
5Ch
Reserved
Primary Bus Number
Register
Secondary Bus
Number Register
Subordinate Bus
Number Register
Secondary Latency
Timer
I/O Base Register
No
Yes
1Dh
5Dh
I/O Limit Register
No
Yes
1Fh – 1Eh
5Fh – 5Eh
No
Yes
21h – 20h
61h – 60h
Secondary Status
Register
Memory Base Register
No
Yes
23h – 22h
63h – 62h
No
Yes
25h – 24h
65h – 64h
Vendor ID
Device ID
Primary Command
Register
Primary Status
Register
Class Code and
Revision ID
Primary Cacheline Size
Register
Primary Latency Timer
Header Type Register
Reserved
Primary CSR and
Memory 0 BAR
Primary CSR I/O BAR
Downstream I/O or
Memory 1 BAR
Downstream I/O or
Memory 1 BAR
Downstream I/O or
Memory 1 BAR
Downstream I/O or
Memory 1 BAR
Downstream Memory
2 BAR
Downstream Memory
2 BAR
Downstream Memory
2 BAR
Downstream Memory
3 BAR
Downstream Memory
3 BAR
Downstream Memory
3 Upper 32-bit BAR
No
Yes
Memory Limit
Register
Prefetchable Memory
Base Register
Page 27 of 144
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April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
Primary Bus
Configuration Access
for both Transparent
and Non-Transparent
mode, or Secondary
Bus Configuration
Access for Transparent
Mode
27h – 26h
Secondary Bus
Configuration Access
for Non-Transparent
Mode Only
Transparent Mode
(type1)
Non-Transparent
Mode (Type0)
EEPROM
(I2C)
Access
SM Bus
Access
67h - 66h
Downstream Memory
3 Upper 32-bit BAR
No
Yes
2Bh – 28h
2Bh – 28h
No
Yes
2Dh – 2Ch
2Dh – 2Ch
Subsystem Vendor ID
Yes2
Yes5
2Fh – 2Eh
2Fh – 2Eh
Subsystem ID
Yes2
Yes5
31h – 30h
31h – 30h
Reserved
No
Yes
33h – 32h
33h – 32h
Reserved
No
Yes
34h
37h – 35h
3Bh – 38h
3Ch
3Dh
3Eh
3Fh
41h – 40h
34h
37h – 35h
3Bh – 38h
7Ch
7Dh
7Eh
7Fh
41h – 40h
Yes
Yes
Yes
Yes
Yes
Yes3
Yes3
Yes
43h – 42h
05h – 04h
Yes
No
Yes
Yes
47h – 46h
07h – 06h
Reserved
No
Yes
4Bh – 48h
4Bh – 48h
Yes
Yes
4Ch
0Ch
Arbiter Mode, Enable,
Priority
Reserved
No
Yes
4Dh
0Dh
Reserved
No
Yes
4Eh
4Fh
53h – 50h
0Eh
0Fh
13h – 10h
Reserved
Reserved
Reserved
No
No
Yes
Yes
57h – 54h
17h – 14h
Reserved
No
Yes
5Bh – 58h
1Bh – 18h
Reserved
No
Yes
5Fh – 5Ch
1Fh – 1Ch
Reserved
No
Yes
63h – 60h
23h – 20h
Reserved
No
Yes
67h – 64h
27h – 24h
Reserved
No
Yes
69h – 68h
69h – 68h
Yes
Yes
6Ah
6Ah
PCI Express Tx and Rx
Control
Reserved
Yes3
Yes3
6Bh
6Dh – 6Ch
6Fh – 6Eh
6Bh
6Dh – 6Ch
6Fh – 6Eh
Reserved
Reserved
Reserved
Capability Pointer
Reserved
Reserved
Primary Interrupt Line
Primary Interrupt Pin
Primary Min_Gnt
Primary Max_Lat
PCI Data Buffering
Control
Chip Control 0
Secondary Command
Register
Secondary Status
Register
Arbiter Mode, Enable,
Priority
Secondary Cacheline
Size Register
Secondary Status
Register
Header Type
Reserved
Secondary CSR and
Memory 0 BAR
Secondary CSR I/O
BAR
Upstream I/O or
Memory 1 BAR
Upstream Memory 2
BAR
Upstream Memory 3
BAR
Upstream Memory 3
Upper 32-bit BAR
PCI Express Tx and Rx
Control
Memory Address
Forwarding Control
Reserved
Subsystem Vendor ID
Subsystem ID
No
No
No
No
No
Yes3
Yes3
Yes
43h – 42h
45h – 44h
Prefetchable Memory
Limit Register
Prefetchable Memory
Base Upper 32-bit
Register
Prefetchable Memory
Limit Upper 32-bit
Register
Prefetchable Memory
Limit Upper 32-bit
Register
I/O Base Upper 16-bit
Register
I/O Limit Upper 16-bit
Register
Capability Pointer
Reserved
Reserved
Interrupt Line
Interrupt Pin
Bridge Control
Bridge Control
PCI Data Buffering
Control
Chip Control 0
Reserved
No
Yes2
Yes2
Yes
Yes5
Yes5
Page 28 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
Primary Bus
Configuration Access
for both Transparent
and Non-Transparent
mode, or Secondary
Bus Configuration
Access for Transparent
Mode
73h – 70h
Secondary Bus
Configuration Access
for Non-Transparent
Mode Only
Transparent Mode
(type1)
Non-Transparent
Mode (Type0)
EEPROM
(I2C)
Access
SM Bus
Access
73h – 70h
Yes
77h – 74h
7Bh – 78h
No
No
Yes
Yes
7Bh – 78h
7Bh – 78h
No
No
7Bh – 78h
7Ch
7Bh – 78h
3Ch
Reserved (12 bits)
Reserved
No
No
No
Yes
7Dh
3Dh
Reserved
No
Yes
7Eh
7Fh
83h – 80h
87h – 84h
8Bh – 88h
3Eh
3Fh
83h – 80h
87h – 84h
8Bh – 88h
Yes3
Yes3
No
No
No
Yes3
Yes3
Yes
Yes
Yes
8Fh – 8Ch
8Fh – 8Ch
No
Yes
93h – 90h
93h – 90h
Yes
Yes
97h – 94h
97h – 94h
No
Yes
9Bh – 98h
9Bh – 98h
Reserved
Reserved
Capability
Bridge Status
Upstream Split
Transaction
Downstream Split
Transaction
Power Management
Capability
Power Management
Control and Status
Reserved
EEPROM (I2C)
Control and status
Register
Reserved
GPIO Data and
Control (20 bits)
Bridge Control and
Status (10 bits)
Reserved (2 bits)
Secondary Interrupt
Line
Secondary Interrupt
Pin
Secondary Min_Gnt
Secondary Max_Lat
Capability
Bridge Status
Upstream Split
Transaction
Downstream Split
Transaction
Power Management
Capability
Power Management
Control and Status
Downstream Memory
0 Translated Base
Downstream Memory
0 Setup
Slot ID Capability
PCI Clock and
CLKRUN Control
Downstream I/O or
Memory 1 Translated
Base
Downstream I/O or
Memory 1 Setup
PCI Express Capability
Device Capability
Device Control and
Status
Link Capability
Link Control and
Status
Slot Capability
Slot Control and Status
XPIP Configuration
Register 0
XPIP Configuration
Register 1
XPIP Configuration
Register 2
Reserved
VPD Capability
Register
VPD Data Register
No
77h – 74h
7Bh – 78h
EEPROM (I2C)
Control and Status
Register
Reserved
GPIO Data and
Control (20 bits)
Reserved (12 bits)
9Fh – 9Ch
9Fh – 9Ch
Reserved
A3h – A0h
A7h – A4h
A3h – A0h
A7h – A4h
ABh – A8h
ABh – A8h
Slot ID Capability
PCI Clock and
CLKRUN Control
SSID and SSVID
Capability
Afh – ACh
Afh – ACh
B3h – B0h
B7h – B4h
BBh – B8h
B3h – B0h
B7h – B4h
BBh – B8h
BFh – BCh
C3h – C0h
BFh – BCh
C3h – C0h
C7h – C4h
CBh – C8h
CFh – CCh
C7h – C4h
CBh – C8h
CFh – CCh
D3h – D0h
D3h – D0h
D6h – D4h
D6h – D4h
D7h
DBh – D8h
D7h
DBh – D8h
DFh – DCh
DFh – DCh
Subsystem ID and
Subsystem Vendor ID
PCI Express Capability
Device Capability
Device Control and
Status
Link Capability
Link Control and
Status
Slot Capability
Slot Control and Status
XPIP Configuration
Register 0
XPIP Configuration
Register 1
XPIP Configuration
Register 2
Reserved
VPD Capability
Register
VPD Data Register
No
Yes
Yes
3
Yes3
No
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
No
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes4
Yes
Page 29 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
Primary Bus
Configuration Access
for both Transparent
and Non-Transparent
mode, or Secondary
Bus Configuration
Access for Transparent
Mode
E3h – E0h
Secondary Bus
Configuration Access
for Non-Transparent
Mode Only
Transparent Mode
(type1)
Non-Transparent
Mode (Type0)
EEPROM
(I2C)
Access
SM Bus
Access
E3h – E0h
Reserved
No
Yes
E7h – E4h
E7h – E4h
Reserved
Yes3
Yes3
EBh – E8h
EBh – E8h
Reserved
No
Yes
EFh – ECh
EFh – ECh
Reserved
Yes3
Yes3
F3h – F0h
F3h – F0h
No
Yes
F7h – F4h
FBh – F8h
F7h – F4h
FBh – F8h
MSI Capability
Register
Message Address
Message Upper
Address
Message Date
Upstream Memory 0
Translated Base
Upstream Memory 0
setup
Upstream I/O or
Memory 1 Translated
Base
Upstream I/O or
Memory 1 Setup
MSI Capability
Register
Message Address
Message Upper
Address
Message Date
No
No
Yes
Yes
No
Yes
FFh – FCh
FFh – FCh
Note 1: When masquerade is enabled, it is pre-loadable.
Note 2: When both masquerade and non-transparent mode are enabled, it is pre-loadable.
Note 3: When non-transparent mode is enabled, it is pre-loadable.
Note 4: The VPD data is read/write through I2C during VPD operation.
Note 5: Read access only.
7.2
PCI EXPRESS EXTENDED CAPABILITY REGISTER MAP
PI7C9X110 also supports PCI Express Extended Capabilities with from 257-byte to 4096-byte space. The offset
range is from 100h to FFFh. The offset 100h is defined for Advance Error Reporting (ID=0001h). The offset 150h
is defined for Virtual Channel (ID=0002h).
Table 7-2 PCI Express Extended Capability Register Map (100h – FFFh)
Primary Bus
Configuration Access
for both Transparent
and Non-Transparent
mode, or Secondary
Bus Configuration
Access for Transparent
Mode
103h – 100h
Secondary Bus
Configuration Access
for Non-Transparent
Mode Only
Transparent Mode
(type1)
Non-Transparent
Mode (Type0)
EEPROM
(I2C)
Access
SM Bus
Access
103h – 100h
Yes5
107h – 104h
No
Yes
10Bh – 108h
10Bh – 108h
No
Yes
10Fh – 10Ch
113h – 110h
10Fh – 10Ch
113h – 110h
No
No
Yes
Yes
117h – 114h
117h – 114h
No
Yes
11Bh – 118h
12Bh – 11Ch
12Fh – 12Ch
11Bh – 118h
12Bh – 11Ch
12Fh – 12Ch
Advanced Error
Reporting (AER)
Capability
Uncorrectable Error
Status
Uncorrectable Error
Mask
Uncorrectable Severity
Correctable Error
Status
Correctable Error
Mask
AER Control
Header Log Register
Secondary
Uncorrectable Error
Status
No
107h – 104h
Advanced Error
Reporting (AER)
Capability
Uncorrectable Error
Status
Uncorrectable Error
Mask
Uncorrectable Severity
Correctable Error
Status
Correctable Error
Mask
AER Control
Header Log Register
Secondary
Uncorrectable Error
Status
No
No
No
Yes
Yes
Yes
Page 30 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
Primary Bus
Configuration Access
for both Transparent
and Non-Transparent
mode, or Secondary
Bus Configuration
Access for Transparent
Mode
133h – 130h
Secondary Bus
Configuration Access
for Non-Transparent
Mode Only
Transparent Mode
(type1)
Non-Transparent
Mode (Type0)
EEPROM
(I2C)
Access
SM Bus
Access
133h – 130h
Yes
137h – 134h
No
Yes
13Bh – 138h
13Bh – 138h
No
Yes
14Bh – 13Ch
14Bh – 13Ch
No
Yes
14Fh – 14Ch
153h – 150h
157h – 154h
15Bh – 158h
15Fh – 15Ch
14Fh – 14Ch
153h – 150h
157h – 154h
15Bh – 158h
15Fh – 15Ch
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
163h – 160h
163h – 160h
No
Yes
167h – 164h
16Bh – 168h
2FFh – 170h
303h – 300h
307h – 304h
167h – 164h
16Bh – 168h
2FFh – 170h
503h – 500h
507h – 504h
No
No
No
No
No
Yes
Yes
No
Yes
Yes
30Fh – 308h
310h
50Fh – 508h
510h
Secondary
Uncorrectable Error
Mask
Secondary
Uncorrectable Severity
Secondary AER
Control
Secondary Header Log
Register
Reserved
VC Capability
Port VC Capability 1
Port VC Capability 2
Port VC Status and
Control
VC0 Resource
Capability
VC0 Resource Control
VC0 Resource Status
Reserved
Reserved
Extended GPI/GPO
Data and Control
Reserved
Replay and
Acknowledge Latency
Timer
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
No
137h – 134h
Secondary
Uncorrectable Error
Mask
Secondary
Uncorrectable Severity
Secondary AER
Control
Secondary Header Log
Register
Reserved
VC Capability
Port VC Capability 1
Port VC Capability 2
Port VC Status and
Control
VC0 Resource
Capability
VC0 Resource Control
VC0 Resource Status
Reserved
Reserved
Extended GPI/GPO
Data and Control
Reserved
Replay and
Acknowledge Latency
Timer
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
No
Yes
No
Yes
No
No
No
No
No
No
No
No
No
No
No
No
SM Bus
Access
Yes
Yes
4FFh – 314h
503h – 500h
504h
50Fh – 505h
510h
FFFh – 514h
Note 5: Read access only.
7.3
4FFh – 314h
303h – 300h
304h
30Fh – 305h
310h
FFFh – 514h
CONTROL AND STATUS REGISTER MAP
Table 7-3 Control and Status Register (CSR) Map (000h – FFFh)
PCI Express / PCI
Memory Offset
SM Bus Offset
Register Name
Reset Value
007h – 000h
00Bh – 008h
207h – 200h
20Bh – 208h
0
XXXX_XXXXh
00Fh – 00Ch
20Fh – 20Ch
0000_0000h
Yes
Yes
013h – 010h
213h – 210h
XXXX_XXXXh
No
Yes
017h – 014h
217h – 214h
0000_0000h
Yes
Yes
01Bh – 018h
21Bh – 218h
0000_0000h
Yes
Yes
02Fh – 01Ch
22Fh – 21Ch
Reserved
Downstream Memory
2 Translated Base
Downstream Memory
2 Setup
Downstream Memory
3 Translated Base
Downstream Memory
3 Setup
Downstream Memory
3 Upper 32-bit Setup
Reserved
EEPROM
(I2C)
Access
No
No
0
No
Yes
Page 31 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
7.4
PCI Express / PCI
Memory Offset
SM Bus Offset
Register Name
Reset Value
X
0000_0000h
EEPROM
(I2C)
Access
No
Yes
033h – 030h
037h – 034h
233h – 230h
237h – 234h
03Bh – 038h
21Bh – 218h
04Fh – 03Ch
050h
24Fh – 23Ch
250h
053h – 051h
057h – 054h
253h – 251h
257h – 254h
05Bh – 058h
25Bh – 258h
05Fh – 05Ch
25Fh – 25Ch
063h – 060h
263h – 260h
067h – 064h
267h – 264h
06Fh – 068h
071h – 070h
26Fh – 268h
271h – 270h
073h – 072h
273h – 272h
075h – 074h
275h – 274h
077h – 076h
277h – 276h
079h – 078h
279h – 278h
07Bh – 07Ah
27Bh – 27Ah
07Dh – 07Ch
27Dh – 27Ch
07Fh – 07Eh
27Fh – 27Eh
09Fh – 080h
0A3h – 0A0h
0A7h – 0A4h
0ABh – 0A8h
0AFh – 0ACh
0B3h – 0B0h
0B7h – 0B4h
0BBh – 0B8h
0BFh – 0BCh
0FFh – 0C0h
1FFh – 100h
29Fh – 280h
2A3h – 2A0h
2A7h – 2A4h
2ABh – 2A8h
2AFh – 2ACh
2B3h – 2B0h
2B7h – 2B4h
2BBh – 2B8h
2BCh – 2BFh
2FFh – 2C0h
3FFh – 300h
FFFh – 200h
11FFh – 400h
Reserved
Upstream Memory 3
Setup
Upstream Memory 3
Upper 32-bit Setup
Reserved
Lookup Table Offset
Register
Reserved
Lookup Table Data
Register
Upstream Page
Boundary IRQ 0
Upstream Page
Boundary IRQ 1
Upstream Page
Boundary IRQ Mask 0
Upstream Page
Boundary IRQ Mask 1
Reserved
Primary Clear IRQ
Register
Secondary Clear IRQ
Register
Primary Set IRQ
Register
Secondary Set IRQ
Register
Primary Clear IRQ
Mask Register
Secondary Clear IRQ
Mask Register
Primary Set IRQ Mask
Register
Secondary Set IRQ
Mask Register
Reserved
Scratch pad 0
Scratch pad 1
Scratch pad 2
Scratch pad 3
Scratch pad 4
Scratch pad 5
Scratch pad 6
Scratch pad 7
Reserved
Upstream Memory 2
Lookup Table
Reserved
SM Bus
Access
Yes
Yes
0000_0000h
Yes
Yes
0
XXh
No
No
Yes
Yes
0
XXXX_XXXXh
No
No
Yes
Yes
0000_0000h
No
Yes
0000_0000h
No
Yes
FFFF_FFFFh
No
Yes
FFFF_FFFFh
No
Yes
0
0000h
No
No
Yes
Yes
0000h
No
Yes
0000h
No
Yes
0000h
No
Yes
FFFFh
No
Yes
FFFFh
No
Yes
FFFFh
No
Yes
FFFFh
No
Yes
0
XXXX_XXXXh
XXXX_XXXXh
XXXX_XXXXh
XXXX_XXXXh
XXXX_XXXXh
XXXX_XXXXh
XXXX_XXXXh
XXXX_XXXXh
0
0
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
0
No
Yes
PCI CONFIGURATION REGISTERS FOR TRANSPARENT BRIDGE MODE
The following section describes the configuration space when the device is in transparent mode. The descriptions
for different register type are listed as follow:
Register Type
RO
ROS
RW
Descriptions
Read Only
Read Only and Sticky
Read/Write
Page 32 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
RWC
RWS
RWCS
7.4.1
VENDOR ID – OFFSET 00h
BIT
15:0
7.4.2
FUNCTION
Vendor ID
TYPE
RO
DESCRIPTION
Identifies Pericom as the vendor of this device. Returns 12D8h when read.
TYPE
RO
DESCRIPTION
Identifies this device as the PI7C9X110. Returns E110 when read.
DEVICE ID – OFFSET 00h
BIT
31:16
7.4.3
Read/Write “1” to clear
Read/Write and Sticky
Read/Write “1” to clear and Sticky
FUNCTION
Device ID
COMMAND REGISTER – OFFSET 04h
BIT
0
FUNCTION
I/O Space Enable
TYPE
RW
1
Memory Space Enable
RW
2
Bus Master Enable
RW
3
Special Cycle Enable
RO
4
Memory Write and
Invalidate Enable
RO
5
VGA Palette Snoop Enable
RO /
RW
6
Parity Error Response
Enable
RW
7
Wait Cycle Control
RO
8
SERR_L Enable Bit
RW
DESCRIPTION
0: Ignore I/O transactions on the primary interface
1: Enable response to memory transactions on the primary interface
Reset to 0
0: Ignore memory read transactions on the primary interface
1: Enable memory read transactions on the primary interface
Reset to 0
0: Do not initiate memory or I/O transactions on the primary interface and
disable response to memory and I/O transactions on the secondary interface
1: Enable the bridge to operate as a master on the primary interfaces for
memory and I/O transactions forwarded from the secondary interface. If the
primary of the reverse bridge is mode, the bridge is allowed to initiate a split
completion transaction regardless of the status bit.
Reset to 0
0: PI7C9X110 does not respond as a target to Special Cycle transactions, so
this bit is defined as Read-Only and must return 0 when read
Reset to 0
0: PI7C9X110 does not originate a Memory Write and Invalidate
transaction. Implements this bit as Read-Only and returns 0 when read
(unless forwarding a transaction for another master).
Reset to 0
This bit applies to reverse bridge only.
0: Ignore VGA palette access on the primary
1: Enable positive decoding response to VGA palette writes on the primary
interface with I/O address bits AD [9:0] equal to 3C6h, 3C8h, and 3C9h
(inclusive of ISA alias; AD [15:0] are not decoded and may be any value)
Reset to 0
0: May ignore any parity error that is detected and take its normal action
1: This bit if set, enables the setting of Master Data Parity Error bit in the
Status Register when poisoned TLP received or parity error is detected and
takes its normal action
Reset to 0
Wait cycle control not supported
Reset to 0
0: Disable
1: Enable PI7C9X110 in forward bridge mode to report non-fatal or fatal
error message to the Root Complex. Also, in reverse bridge mode to assert
SERR_L on the primary interface
Page 33 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
7.4.4
BIT
FUNCTION
TYPE
9
Fast Back-to-Back Enable
RO
10
Interrupt Disable
RO /
RW
15:11
Reserved
RO
DESCRIPTION
Reset to 0
Fast back-to-back enable not supported
Reset to 0
This bit applies to reverse bridge only.
0: INTA_L, INTB_L, INTC_L, and INTD_L can be asserted on PCI
interface
1: Prevent INTA_L, INTB_L, INTC_L, and INTD_L from being asserted on
PCI interface
Reset to 0
Reset to 00000
PRIMARY STATUS REGISTER – OFFSET 04h
BIT
18:16
19
20
FUNCTION
Reserved
Reserved (transparent mode)
Capability List Capable
TYPE
RO
RO
RO
DESCRIPTION
Reset to 000
Reset to 0
1: PI7C9X110 supports the capability list (offset 34h in the pointer to the
data structure)
21
66MHz Capable
RO
Reset to 1
This bit applies to reverse bridge only.
1: 66MHz capable
22
23
Reserved
Fast Back-to-Back Capable
RO
RO
Reset to 0 when forward bridge or 1 when reverse bridge.
Reset to 0
This bit applies to reverse bridge only.
1: Enable fast back-to-back transactions
24
Master Data Parity Error
Detected
RWC
Reset to 0 when forward bridge or 1 when reverse bridge in PCI mode.
Bit set if its Parity Error Enable bit is set and either of the conditions occurs
on the primary:
FORWARD BRIDGE –
Receives a completion marked poisoned
Poisons a write request
REVERSE BRIDGE –
Detected parity error when receiving data or Split Response for read
Observes P_PERR_L asserted when sending data or receiving Split Response
for write
Receives a Split Completion Message indicating data parity error occurred
for non-posted write
26:25
DEVSEL_L Timing
(medium decode)
RO
Reset to 0
These bits apply to reverse bridge only.
00:
01:
10:
11:
27
Signaled Target Abort
RWC
28
Received Target Abort
RWC
fast DEVSEL_L decoding
medium DEVSEL_L decoding
slow DEVSEL_L decoding
reserved
Reset to 00 when forward bridge or 01 when reverse bridge.
FORWARD BRIDGE –
This bit is set when PI7C9X110 completes a request using completer abort
status on the primary
REVERSE BRIDGE –
This bit is set to indicate a target abort on the primary
Reset to 0
FORWARD BRIDGE –
This bit is set when PI7C9X110 receives a completion with completer abort
completion status on the primary
Page 34 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
FUNCTION
TYPE
29
Received Master Abort
RWC
30
Signaled System Error
RWC
31
Detected Parity Error
RWC
DESCRIPTION
REVERSE BRIDGE –
This bit is set when PI7C9X110 detects a target abort on the primary
Reset to 0
FORWARD BRIDGE –
This bit is set when PI7C9X110 receives a completion with unsupported
request completion status on the primary
REVERSE BRIDGE –
This bit is set when PI7C9X110 detects a master abort on the primary
FORWARD BRIDGE –
This bit is set when PI7C9X110 sends an ERR_FATAL or
ERR_NON_FATAL message on the primary
REVERSE BRIDGE –
This bit is set when PI7C9X110 asserts SERR_L on the primary
Reset to 0
FORWARD BRIDGE –
This bit is set when poisoned TLP is detected on the primary
REVERSE BRIDGE –
This bit is set when address or data parity error is detected on the primary
Reset to 0
7.4.5
REVISION ID REGISTER – OFFSET 08h
BIT
7:0
7.4.6
FUNCTION
Revision
TYPE
RO
DESCRIPTION
Reset to 00000004h
CLASS CODE REGISTER – OFFSET 08h
BIT
15:8
FUNCTION
Programming Interface
23:16
Sub-Class Code
TYPE
RO
DESCRIPTION
Subtractive decoding of PCI-PCI bridge not supported
Reset to 00000000
Sub-Class Code
RO
00000100: PCI-to-PCI bridge
31:24
Base Class Code
Reset to 00000100
Base class code
RO
00000110: Bridge Device (transparent mode)
Reset to 00000110 (transparent mode)
7.4.7
CACHE LINE SIZE REGISTER – OFFSET 0Ch
BIT
1:0
FUNCTION
Reserved
TYPE
RO
DESCRIPTION
Bit [1:0] not supported
2
Cache Line Size
RW
Reset to 00
1: Cache line size = 4 double words
3
Cache Line Size
RW
Reset to 0
1: Cache line size = 8 double words
4
Cache Line Size
RW
Reset to 0
1: Cache line size = 16 double words
5
Cache Line Size
RW
Reset to 0
1: Cache line size = 32 double words
Page 35 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
FUNCTION
7:6
Reserved
TYPE
DESCRIPTION
Reset to 0
Bit [7:6] not supported
RO
Reset to 00
7.4.8
PRIMARY LATENCY TIMER REGISTER – OFFSET 0Ch
BIT
15:8
FUNCTION
Primary Latency Timer
TYPE
RO /
RW
DESCRIPTION
8 bits of primary latency timer in PCI
FORWARD BRIDGE – RO with reset to 00h
REVERSE BRIDGE – RW with reset to 00h in PCI mode
7.4.9
PRIMARY HEADER TYPE REGISTER – OFFSET 0Ch
BIT
22:16
FUNCTION
PCI-to-PCI bridge
configuration
(transparent mode)
TYPE
RO
DESCRIPTION
PCI-to-PCI bridge configuration (10 – 3Fh)
Reset to 0000001 (transparent mode)
RO
23
Other bridge configuration
(non-transparent mode)
Single Function Device
RO
Type-0 header format configuration (10-3Fh)
Reset to 0000000 (non-transparent mode)
0: Indicates single function device
31:24
Reserved
RO
Reset to 0
Reset to 00h
7.4.10 RESERVED REGISTERS – OFFSET 10h TO 17h
7.4.11 PRIMARY BUS NUMBER REGISTER – OFFSET 18h
BIT
7:0
FUNCTION
Primary Bus Number
TYPE
RW
DESCRIPTION
Reset to 00h
7.4.12 SECONDARY BUS NUMBER REGISTER – OFFSET 18h
BIT
15:8
FUNCTION
Secondary Bus Number
TYPE
RW
DESCRIPTION
Reset to 00h
7.4.13 SUBORDINATE BUS NUMBER REGISTER – OFFSET 18h
BIT
23:16
FUNCTION
Subordinate Bus Number
TYPE
RW
DESCRIPTION
Reset to 00h
7.4.14 SECONDARY LATENCY TIME REGISTER – OFFSET 18h
BIT
31:24
FUNCTION
Secondary Latency Timer
TYPE
RW /
RO
DESCRIPTION
Secondary latency timer in PCI
FORWARD BRIDGE –
RW with reset to 00h in PCI mode
REVERSE BRIDGE –
RO with reset to 00h
7.4.15 I/O BASE REGISTER – OFFSET 1Ch
Page 36 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
1:0
FUNCTION
32-bit I/O Addressing
Support
3:2
7:4
Reserved
I/O Base
TYPE
RO
DESCRIPTION
01: Indicates PI7C9X110 supports 32-bit I/O addressing
Reset to 01
Reset to 00
Indicates the I/O base (0000_0000h)
RO
RW
Reset to 0000
7.4.16 I/O LIMIT REGISTER – OFFSET 1Ch
BIT
9:8
FUNCTION
32-bit I/O Addressing
Support
11:10
15:12
Reserved
I/O Base
TYPE
RO
DESCRIPTION
01: Indicates PI7C9X110 supports 32-bit I/O addressing
Reset to 01
Reset to 00
Indicates the I/O Limit (0000_0FFFh)
RO
RW
Reset to 0000
7.4.17 SECONDARY STATUS REGISTER – OFFSET 1Ch
BIT
20:16
21
FUNCTION
Reserved
66MHz Capable
22
23
Reserved
Fast Back-to-Back Capable
24
Master Data Parity Error
Detected
TYPE
RO
RO
RO
RO
RWC
DESCRIPTION
Reset to 00000
Indicates PI7C9X110 is 66MHz capable
Reset to 1
Reset to 0
FORWARD BRIDGE: reset to 1 when secondary bus is in PCI mode
(supports fast back-to-back transactions)
REVERSE BRIDGE: reset to 0 (does not support fast back-to-back
transactions)
This bit is set if its parity error enable bit is set and either of the conditions
occur on the primary:
FORWARD BRIDGE –
•
Detected parity error when receiving data or split response for read
•
Observes S_PERR_L asserted when sending data or receiving split
response for write
•
Receives a split completion message indicating data parity error
occurred for non-posted write
REVERSE BRIDGE –
•
Receives a completion marked poisoned
•
Poisons a write request
26:25
DEVSEL_L Timing
(medium decoding)
RO
Reset to 0
These bits apply to forward bridge only.
01: medium DEVSEL_L decoding
27
Signaled Target Abort
RWC
Reset to 01 when forward mode or 00 when reverse mode.
FORWARD BRIDGE –
Bit is set when PI7C9X110 signals target abort
REVERSE BRIDGE –
Bit is set when PI7C9X110 completes a request using completer abort
completion status
Reset to 0
Page 37 of 144
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April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
28
FUNCTION
Received Target Abort
TYPE
RWC
29
Received Master Abort
RWC
30
Received System Error
RWC
31
Detected Parity Error
RWC
DESCRIPTION
FORWARD BRIDGE –
Bit is set when PI7C9X110 detects target abort on the secondary interface
REVERSE BRIDGE –
Bit is set when PI7C9X110 receives a completion with completer abort
completion status on the secondary interface
Reset to 0
FORWARD BRIDGE –
Bit is set when PI7C9X110 detects master abort on the secondary interface
REVERSE BRIDGE –
Bit is set when PI7C9X110 receives a completion with unsupported request
completion status on the primary interface
Reset to 0
FORWARD BRIDGE –
Bit is set when PI7C9X110 detects SERR_L assertion on the secondary
interface
REVERSE BRIDGE –
Bit is set when PI7C9X110 receives an ERR_FATAL or
ERR_NON_FATAL message on the secondary interface
Reset to 0
FORWARD BRIDGE –
Bit is set when PI7C9X110 detects address or data parity error
REVERSE BRIDGE –
Bit is set when PI7C9X110 detects poisoned TLP on secondary interface
Reset to 0
7.4.18 MEMORY BASE REGISTER – OFFSET 20h
BIT
3:0
15:4
FUNCTION
Reserved
Memory Base
TYPE
RO
RW
DESCRIPTION
Reset to 0000
Memory Base (80000000h)
Reset to 800h
7.4.19 MEMORY LIMIT REGISTER – OFFSET 20h
BIT
19:16
31:20
FUNCTION
Reserved
Memory Limit
TYPE
RO
RW
DESCRIPTION
Reset to 0000
Memory Limit (000FFFFFh)
Reset to 000h
7.4.20 PREFETCHABLE MEMORY BASE REGISTER – OFFSET 24h
BIT
3:0
FUNCTION
64-bit Addressing Support
TYPE
RO
15:4
Prefetchable Memory Base
RW
DESCRIPTION
0001: Indicates PI7C9X110 supports 64-bit addressing
Reset to 0001
Prefetchable Memory Base (00000000_80000000h)
Reset to 800h
7.4.21 PREFETCHABLE MEMORY LIMIT REGISTER – OFFSET 24h
BIT
FUNCTION
TYPE
DESCRIPTION
Page 38 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
19:16
FUNCTION
64-bit Addressing Support
TYPE
RO
31:20
Prefetchable Memory Limit
RW
DESCRIPTION
0001: Indicates PI7C9X110 supports 64-bit addressing
Reset to 0001
Prefetchable Memory Limit (00000000_000FFFFFh)
Reset to 000h
Page 39 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
7.4.22 PREFETCHABLE BASE UPPER 32-BIT REGISTER – OFFSET 28h
BIT
31:0
FUNCTION
Prefetchable Base Upper 32bit
TYPE
RW
DESCRIPTION
Bit [63:32] of prefetchable base
Reset to 00000000h
7.4.23 PREFETCHABLE LIMIT UPPER 32-BIT REGISTER – OFFSET 2Ch
BIT
31:0
FUNCTION
Prefetchable Limit Upper
32-bit
TYPE
RW
DESCRIPTION
Bit [63:32] of prefetchable limit
Reset to 00000000h
7.4.24 I/O BASE UPPER 16-BIT REGISTER – OFFSET 30h
BIT
15:0
FUNCTION
I/O Base Upper 16-bit
TYPE
RW
DESCRIPTION
Bit [31:16] of I/O Base
Reset to 0000h
7.4.25 I/O LIMIT UPPER 16-BIT REGISTER – OFFSET 30h
BIT
31:16
FUNCTION
I/O Limit Upper 16-bit
TYPE
RW
DESCRIPTION
Bit [31:16] of I/O Limit
Reset to 0000h
7.4.26 CAPABILITY POINTER – OFFSET 34h
BIT
31:8
7:0
FUNCTION
Reserved
Capability Pointer
TYPE
RO
RO
DESCRIPTION
Reset to 0
Capability pointer to 80h
Reset to 80h
7.4.27 EXPANSION ROM BASE ADDRESS REGISTER – OFFSET 38h
BIT
31:0
FUNCTION
Expansion ROM Base
Address
TYPE
RO
DESCRIPTION
Expansion ROM not supported.
Reset to 00000000h
7.4.28 INTERRUPT LINE REGISTER – OFFSET 3Ch
BIT
7:0
FUNCTION
Interrupt Line
TYPE
RW
DESCRIPTION
These bits apply to reverse bridge only.
For initialization code to program to tell which input of the interrupt
controller the PI7C9X110’s INTA_L in connected to.
Reset to 00000000
Page 40 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
7.4.29 INTERRUPT PIN REGISTER – OFFSET 3Ch
BIT
15:8
FUNCTION
Interrupt Pin
TYPE
RO
DESCRIPTION
These bits apply to reverse bridge only.
Designates interrupt pin INTA_L, is used
Reset to 00h when forward mode or 01h when reverse mode.
7.4.30 BRIDGE CONTROL REGISTER – OFFSET 3Ch
BIT
16
FUNCTION
Parity Error Response
Enable
TYPE
RW
DESCRIPTION
0: Ignore parity errors on the secondary
1: Enable parity error detection on secondary
FORWARD BRIDGE –
Controls the response to uncorrectable address attribute and data errors on the
secondary
REVERSE BRIDGE –
Controls the setting of the master data parity error bit in response to a
received poisoned TLP from the secondary (PCIe link)
17
SERR_L Enable
RW
18
ISA Enable
RW
19
VGA Enable
RW
20
VGA 16-bit Decode
RW
21
Master Abort Mode
RW
22
Secondary Interface Reset
RW
23
Fast Back-to-Back Enable
RO
Reset to 0
0: Disable the forwarding of SERR_L to ERR_FATAL and
ERR_NONFATAL
1: Enable the forwarding of SERR_L to ERR_FATAL and
ERR_NONFATAL
Reset to 0 (FORWARD BRIDGE)
RO bit for REVERSE BRIDGE
0: Forward downstream all I/O addresses in the address range defined by the
I/O Base and Limit registers
1: Forward upstream all I/O addresses in the address range defined by the
I/O Base and Limit registers that are in the first 64KB of PCI I/O address
space (top 768 bytes of each 1KB block)
Reset to 0
0: Do not forward VGA compatible memory and I/O addresses from the
primary to secondary, unless they are enabled for forwarding by the defined
I/O and memory address ranges
1: Forward VGA compatible memory and I/O addresses from the primary
and secondary (if the I/O enable and memory enable bits are set),
independent of the ISA enable bit
0: Execute 10-bit address decodes on VGA I/O accesses
1: Execute 16-bit address decode on VGA I/O accesses
Reset to 0
0: Do not report master aborts (return FFFFFFFFh on reads and discards
data on write)
1: Report master abort by signaling target abort if possible or by the
assertion of SERR_L (if enabled).
Reset to 0
0: Do not force the assertion of RESET_L on secondary PCI bus for forward
bridge, or do not generate a hot reset on the PCIe link for reverse bridge
1: Force the assertion of RESET_L on secondary PCI bus for forward
bridge, or generate a hot reset on the PCIe link for reverse bridge
Reset to 0
Fast back-to-back not supported
Reset to 0
Page 41 of 144
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April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
24
FUNCTION
Primary Master Timeout
TYPE
RW
DESCRIPTION
0: Primary discard timer counts 215 PCI clock cycles
1: Primary discard timer counts 210 PCI clock cycles
FORWARD BRIDGE –
Bit is RO and ignored by the PI7C9X110
25
Secondary Master Timeout
Reset to 0
0: Secondary discard timer counts 215 PCI clock cycles
1: Secondary discard timer counts 210 PCI clock cycles
RW
REVERSE BRIDGE –
Bit is RO and ignored by PI7C9X110
26
Master Timeout Status
RWC
27
Discard Timer SERR_L
Enable
RW
31:28
Reserved
RO
Reset to 0
Bit is set when the discard timer expires and a delayed completion is
discarded at the PCI interface for the forward or reverse bridge
Reset to 0
Bit is set to enable to generate ERR_NONFATAL or ERR_FATAL for
forward bridge, or assert P_SERR_L for reverse bridge as a result of the
expiration of the discard timer on the PCI interface.
Reset to 0
Reset to 0000
7.4.31 PCI DATA BUFFERING CONTROL REGISTER – OFFSET 40h
BIT
0
FUNCTION
Secondary Internal Arbiter’s
PARK Function
TYPE
RW
DESCRIPTION
0: Park to the last master
1: Park to PI7C9X110 secondary port
1
Memory Read Prefetching
Dynamic Control Disable
RW
Reset to 0
0: Enable memory read prefetching dynamic control for PCI to PCIe read
1: Disable memory read prefetching dynamic control for PCI to PCIe read
2
Completion Data Prediction
Control
RW
Reset to 0
0: Enable completion data prediction for PCI to PCIe read.
1: Disable completion data prediction
3
5:4
Reserved
PCI Read Multiple Prefetch
Mode
RO
RW
Reset to 0
Reset to 0
00: One cache line prefetch if memory read multiple address is in
prefetchable range at the PCI interface
01: Full prefetch if address is in prefetchable range at PCI interface, and the
PI7C9X110 will keep remaining data after it disconnects the external master
during burst read with read multiple command until the discard timer expires
10: Full prefetch if address is in prefetchable range at PCI interface
11: Full prefetch if address is in prefetchable range at PCI interface and the
PI7C9X110 will keep remaining data after the read multiple is terminated
either by an external master or by the PI7C9X110, until the discard time
expires
Reset to 10
Page 42 of 144
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April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
7:6
FUNCTION
PCI Read Line Prefetch
Mode
TYPE
RW
DESCRIPTION
00: Once cache line prefetch if memory read address is in prefetchable range
at PCI interface
01: Full prefetch if address is in prefetchable range at PCI interface and the
PI7C9X110 will keep remaining data after it is disconnected by an external
master during burst read with read line command, until discard timer expires
10: Full prefetch if memory read line address is in prefetchable range at PCI
interface
11: Full prefetch if address is in prefetchable range at PCI interface and the
PI7C9X110 will keep remaining data after the read line is terminated either
by an external master or by the PI7C9X110, until the discard timer expires
9:8
PCI Read Prefetch Mode
Reset to 00
00: One cache line prefetch if memory read address is in prefetchable range
at PCI interface
RW
01: Reserved
10: Full prefetch if memory read address is in prefetchable range at PCI
interface
11: Disconnect on the first DWORD
10
PCI Special Delayed Read
Mode Enable
Reset to 00
0: Retry any master at PCI bus that repeats its transaction with command
code changes.
RW
1: Allows any master at PCI bus to change memory command code (MR,
MRL, MRM) after it has received a retry. The PI7C9X110 will complete the
memory read transaction and return data back to the master if the address and
byte enables are the same.
11
14:12
Reserved
Maximum Memory Read
Byte Count
Reset to 0
Reset to 0
Maximum byte count is used by the PI7C9X110 when generating memory
read requests on the PCIe link in response to a memory read initiated on the
PCI bus and bit [9:8], bit [7:6], and bit [5:4] are set to “full prefetch”.
RO
RW
000:
001:
010:
011:
100:
101:
110:
111:
512 bytes (default)
128 bytes
256 bytes
512 bytes
1024 bytes
2048 bytes
4096 bytes
512 bytes
Reset to 000
7.4.32 CHIP CONTROL 0 REGISTER – OFFSET 40h
BIT
15
FUNCTION
Flow Control Update
Control
TYPE
RW
16
PCI Retry Counter Status
RWC
DESCRIPTION
0: Flow control is updated for every two credits available
1: Flow control is updated for every on credit available
Reset to 0
0: The PCI retry counter has not expired since the last reset
1: The PCI retry counter has expired since the last reset
Reset to 0
Page 43 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
18:17
FUNCTION
PCI Retry Counter Control
TYPE
RW
19
PCI Discard Timer Disable
RW
DESCRIPTION
00: No expiration limit
01: Allow 256 retries before expiration
10: Allow 64K retries before expiration
11: Allow 2G retries before expiration
Reset to 00
0: Enable the PCI discard timer in conjunction with bit [27] offset 3Ch
(bridge control register)
1: Disable the PCI discard timer in conjunction with bit [27] offset 3Ch
(bridge control register)
20
PCI Discard Timer Short
Duration
RW
Reset to 0
0: Use bit [24] offset 3Ch for forward bridge or bit [25] offset 3Ch for
reverse bridge to indicate how many PCI clocks should be allowed before the
PCI discard timer expires
1: 64 PCI clocks allowed before the PCI discard timer expires
22:21
Configuration Request Retry
Timer Counter Value
Control
RW
23
Delayed Transaction Order
Control
RW
25:24
Completion Timer Counter
Value Control
RW
26
Isochronous Traffic Support
Enable
RW
Reset to 0
00: Timer expires at 25us
01: Timer expires at 0.5ms
10: Timer expires at 5ms
11: Timer expires at 25ms
Reset to 01
0: Enable out-of-order capability between delayed transactions
1: Disable out-of-order capability between delayed transactions
Reset to 0
00: Timer expires at 50us
01: Timer expires at 10ms
10: Timer expires at 50ms
11: Timer disabled
Reset to 01
0: All memory transactions from PCI to PCIe will be mapped to TC0
1: All memory transactions from PCI to PCIe will be mapped to Traffic Class
defined in bit [29:27] of offset 40h.
29:27
30
Traffic Class Used For
Isochronous Traffic
Serial Link Interface
Loopback Enable
RW
RW /
RO
Reset to 0
Reset to 001
0: Normal mode
1: Enable serial link interface loopback mode (TX to RX) if TM0=LOW,
TM1=HIGH, TM2=HIGH, MSK_IN=HIGH, REVRSB=HIGH. PCI
transaction from PCI bus will loop back to PCI bus
RO for forward bridge
31
Primary Configuration
Access Lockout
RO /
RW
Reset to 0
0: PI7C9X110 configuration space can be accessed from both interfaces
1: PI7C9X110 configuration space can only be accessed from the secondary
interface. Primary bus accessed receives completion with CRS status for
forward bridge, or target retry for reverse bridge
Reset to 0 if TM0 is LOW
Page 44 of 144
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April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
7.4.33 RESERVED REGISTER – OFFSET 44h
BIT
31:0
FUNCTION
Reserved
TYPE
RO
DESCRIPTION
Reset to 00000000h
7.4.34 ARBITER ENABLE REGISTER – OFFSET 48h
BIT
0
FUNCTION
Enable Arbiter 0
TYPE
RW
DESCRIPTION
0: Disable arbitration for internal PI7C9X110 request
1: Enable arbitration for internal PI7C9X110 request
1
Enable Arbiter 1
RW
Reset to 1
0: Disable arbitration for master 1
1: Enable arbitration for master 1
2
Enable Arbiter 2
RW
Reset to 1
0: Disable arbitration for master 2
1: Enable arbitration for master 2
3
Enable Arbiter 3
RW
Reset to 1
0: Disable arbitration for master 3
1: Enable arbitration for master 3
4
Enable Arbiter 4
RW
Reset to 1
0: Disable arbitration for master 4
1: Enable arbitration for master 4
5
Enable Arbiter 5
RW
Reset to 1
0: Disable arbitration for master 5
1: Enable arbitration for master 5
6
Enable Arbiter 6
RW
Reset to 1
0: Disable arbitration for master 6
1: Enable arbitration for master 6
7
Enable Arbiter 7
RW
Reset to 1
0: Disable arbitration for master 7
1: Enable arbitration for master 7
8
Enable Arbiter 8
RW
Reset to 1
0: Disable arbitration for master 8
1: Enable arbitration for master 8
Reset to 1
7.4.35 ARBITER MODE REGISTER – OFFSET 48h
BIT
9
FUNCTION
External Arbiter Bit
10
Broken Master Timeout
Enable
TYPE
RO
RW
DESCRIPTION
0: Enable internal arbiter (if CFN_L is tied LOW)
1: Use external arbiter (if CFN_L is tied HIGH)
Reset to 0/1 according to what CFN_L is tied to
0: Broken master timeout disable
1: This bit enables the internal arbiter to count 16 PCI bus cycles while
waiting for FRAME_L to become active when a device’s PCI bus GNT is
active and the PCI bus is idle. If the broken master timeout expires, the PCI
bus GNT for the device is de-asserted.
Reset to 0
Page 45 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
11
FUNCTION
Broken Master Refresh
Enable
TYPE
RW
DESCRIPTION
0: A broken master will be ignored forever after de-asserting its REQ_L for
at least 1 clock
1: Refresh broken master state after all the other masters have been served
once
19:12
Arbiter Fairness Counter
RW
20
GNT_L Output Toggling
Enable
RW
Reset to 0
08h: These bits are the initialization value of a counter used by the internal
arbiter. It controls the number of PCI bus cycles that the arbiter holds a
device’s PCI bus GNT active after detecting a PCI bus REQ_L from another
device. The counter is reloaded whenever a new PCI bus GNT is asserted.
For every new PCI bus GNT, the counter is armed to decrement when it
detects the new fall of FRAME_L. If the arbiter fairness counter is set to 00h,
the arbiter will not remove a device’s PCI bus GNT until the device has deasserted its PCI bus REQ.
Reset to 08h
0: GNT_L not de-asserted after granted master assert FRAME_L
1: GNT_L de-asserts for 1 clock after 2 clocks of the granted master asserting
FRAME_L
21
Reserved
Reset to 0
Reset to 0
RO
7.4.36 ARBITER PRIORITY REGISTER – OFFSET 48h
BIT
22
FUNCTION
Arbiter Priority 0
TYPE
RW
DESCRIPTION
0: Low priority request to internal PI7C9X110
1: High priority request to internal PI7C9X110
23
Arbiter Priority 1
RW
Reset to 1
0: Low priority request to master 1
1: High priority request to master 1
24
Arbiter Priority 2
RW
Reset to 0
0: Low priority request to master 2
1: High priority request to master 2
25
Arbiter Priority 3
RW
Reset to 0
0: Low priority request to master 3
1: High priority request to master 3
26
Arbiter Priority 4
RW
Reset to 0
0: Low priority request to master 4
1: High priority request to master 4
27
Arbiter Priority 5
RW
Reset to 0
0: Low priority request to master 5
1: High priority request to master 5
28
Arbiter Priority 6
RW
Reset to 0
0: Low priority request to master 6
1: High priority request to master 6
29
Arbiter Priority 7
RW
Reset to 0
0: Low priority request to master 7
1: High priority request to master 7
Reset to 0
Page 46 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
30
FUNCTION
Arbiter Priority 8
31
Reserved
TYPE
RW
DESCRIPTION
0: Low priority request to master 8
1: High priority request to master 8
Reset to 0
Reset to 0
RO
7.4.37 RESERVED REGISTERS – OFFSET 4Ch – 64h
7.4.38 EXPRESS TRANSMITTER/RECEIVER REGISTER – OFFSET 68h
BIT
1:0
FUNCTION
Nominal Driver Current
Control
TYPE
RW
5:2
Driver Current Scale
Multiple Control
RW
11:8
Driver De-emphasis Level
Control
RW
13:12
Transmitter Termination
Control
RW
DESCRIPTION
00: 20mA
01: 10mA
10: 28mA
11: Reserved
Reset to 00
0000: 1.00 x nominal driver current
0001: 1.05 x nominal driver current
0010: 1.10 x nominal driver current
0011: 1.15 x nominal driver current
0100: 1.20 x nominal driver current
0101: 1.25 x nominal driver current
0110: 1.30 x nominal driver current
0111: 1.35 x nominal driver current
1000: 1.60 x nominal driver current
1001: 1.65 x nominal driver current
1010: 1.70 x nominal driver current
1011: 1.75 x nominal driver current
1100: 1.80 x nominal driver current
1101: 1.85 x nominal driver current
1110: 1.90 x nominal driver current
1111: 1.95 x nominal driver current
Reset to 0000
0000: 0.00 db
0001: -0.35 db
0010: -0.72 db
0011: -1.11 db
0100: -1.51 db
0101: -1.94 db
0110: -2.38 db
0111: -2.85 db
1000: -3.35 db
1001: -3.88 db
1010: -4.44 db
1011: -5.04 db
1100: -5.68 db
1101: -6.38 db
1110: -7.13 db
1111: -7.96 db
Reset to 1000
00: 52 ohms
01: 57 ohms
10: 43 ohms
11: 46 ohms
Reset to 00
Page 47 of 144
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April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
15:14
FUNCTION
Receiver Termination
Control
29:16
Reserved
TYPE
RW
DESCRIPTION
00: 52 ohms
01: 57 ohms
10: 43 ohms
11: 46 ohms
Reset to 00
Reset to 00h
RO
7.4.39 UPSTREAM MEMORY WRITE FRAGMENT CONTROL REGISTER – OFFSET 68h
BIT
31:30
FUNCTION
Memory Write Fragment
Control
TYPE
RW
DESCRIPTION
Upstream Memory Write Fragment Control
00: Fragment at 32-byte boundary
01: Fragment at 64-byte boundary
1x: Fragement at 128-byte boundary
Reset to 10h
7.4.40 RESERVED REGISTER – OFFSET 6Ch
7.4.41 EEPROM AUTOLOAD CONTROL/STATUS REGISTER – OFFSET 70h
BIT
0
FUNCTION
Initiate EEPROM Read or
Write Cycle
TYPE
RW
DESCRIPTION
This bit will be reset to 0 after the EEPROM operation is finished.
0: EEPROM AUTOLOAD disabled
0 -> 1: Starts the EEPROM Read or Write cycle
1
Control Command for
EEPROM
RW
Reset to 0
0: Read
1: Write
2
EEPROM Error
RO
Reset to 0
0: EEPROM acknowledge is always received during the EEPROM cycle
1: EEPROM acknowledge is not received during EEPROM cycle
3
EPROM Autoload Complete
Status
RO
Reset to 0
0: EEPROM autoload is not successfully completed
1: EEPROM autoload is successfully completed
5:4
EEPROM Clock Frequency
Control
RW
Reset to 0
Where PCLK is 125MHz
00: PCLK / 4096
01: PCLK / 2048
10: PCLK / 1024
11: PCLK / 128
6
EEPROM Autoload Control
RW
Reset to 00
0: Enable EEPROM autoload
1: Disable EEPROM autoload
7
Fast EEPROM Autoload
Control
RW
Reset to 0
0: Normal speed of EEPROM autoload
1: Increase EEPROM autoload by 32x
Reset to 0
Page 48 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
8
FUNCTION
EEPROM Autoload Status
TYPE
RO
DESCRIPTION
0: EEPROM autoload is not on going
1: EEPROM autoload is on going
15:9
EEPROM Word Address
RW
Reset to 0
EEPROM word address for EEPROM cycle
31:16
EEPROM Data
RW
Reset to 0000000
EEPROM data to be written into the EEPROM
Reset to 0000h
Page 49 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
7.4.42 RESERVED REGISTER – OFFSET 74h
7.4.43 GPIO DATA AND CONTROL REGISTER – OFFSET 78h
BIT
11:0
15:12
19:16
23:20
27:24
31:28
FUNCTION
Reserved
GPIO Output Write-1-toClear
GPIO Output Write-1-to-Set
GPIO Output Enable Write1-to-Clear
GPIO Output Enable Write1-to-Set
GPIO Input Data Register
TYPE
RO
RW
DESCRIPTION
Reset to 000h
Reset to 0h
RW
RW
Reset to 0h
Reset to 0h
RW
Reset to 0h
RO
Reset to 0h
7.4.44 RESERVED REGISTER – OFFSET 7Ch
7.4.45 CAPABILITY ID REGISTER – OFFSET 80h
BIT
7:0
FUNCTION
Capability ID
TYPE
RO
DESCRIPTION
Capability ID
Reset to 07h
7.4.46 NEXT CAPABILITY POINTER REGISTER – OFFSET 80h
BIT
15:8
FUNCTION
Next Capability Pointer
TYPE
RO
DESCRIPTION
Point to power management
Reset to 90h
7.4.47 SECONDARY STATUS REGISTER – OFFSET 80h
BIT
16
FUNCTION
64-bit Device on Secondary
Bus Interface
17
133MHz Capable
18
Split Completion Discarded
TYPE
RO
RO
RO /
RWC
DESCRIPTION
64-bit not supported
Reset to 0
When this bit is 1, PI7C9X110 is 133MHz capable on its secondary bus
interface
Reset to 1 in forward bridge mode or 0 in reverse bridge mode
This bit is a read-only and set to 0 in reverse bridge mode or is read-write in
forward bridge mode
When this is set to 1, a split completion has been discarded by PI7C9X110 at
secondary bus because the requester did not accept the split completion
transaction
19
Unexpected Split
Completion
RWC
Reset to 0
This bit is set to 0 in forward bridge mode or is read-write in reverse bridge
mode
When this is set to 1, an unexpected split completion has been received with
the requester ID equaled to the secondary bus number, device number, and
function number at the PI7X9X110 secondary bus interface
Reset to 0
Page 50 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
20
FUNCTION
Split Completion Overrun
TYPE
RWC
21
Split Request Delayed
RWC
24:22
Secondary Clock Frequency
DESCRIPTION
When this bit is set to 1, a split completion has been terminated by
PI7C9X110 with either a retry or disconnect at the next ADB due to the
buffer full condition
Reset to 0
When this bit is set to 1, a split request is delayed because PI7C9X110 is not
able to forward the split request transaction to its secondary bus due to
insufficient room within the limit specified in the split transaction
commitment limit field of the downstream split transaction control register
Reset to 0
These bits are only meaningful in forward bridge mode. In reverse bridge
mode, all three bits are set to zero.
RO
000: Conventional PCI mode (minimum clock period not applicable)
001: 66MHz (minimum clock period is 15ns)
010: 100 to 133MHz (minimum clock period is 7.5ns)
011: Reserved
1xx: Reserved
31:25
Reserved
Reset to 000
0000000
RO
7.4.48 BRIDGE STATUS REGISTER – OFFSET 84h
BIT
2:0
FUNCTION
Function Number
TYPE
RO
7:3
Device Number
RO
15:8
Bus Number
RO
16
64-bit Device on Primary
Bus Interface
RO
17
133MHz Capable
RO
DESCRIPTION
Function number (AD [10:8] of a type 0 configuration transaction)
Reset to 000
Device number (AD [15:11] of a type 0 configuration transaction) is assigned
to the PI7C9X110 by the connection of system hardware. Each time the
PI7C9X110 is addressed by a configuration write transaction, the bridge
updates this register with the contents of AD [15:11] of the address phase of
the configuration transaction, regardless of which register in the PI7C9X110
is addressed by the transaction. The PI7C9X110 is addressed by a
configuration write transaction if all of the following are true:
•
The transaction uses a configuration write command
•
IDSEL is asserted during the address phase
•
AD [1:0] are 00 (type o configuration transaction)
•
AD [10:8] of the configuration address contain the appropriate function
number
Reset to 11111
Additional address from which the contents of the primary bus number
register on type 1 configuration space header is read. The PI7C9X110 uses
the bus number, device number, and function number fields to create a
completer ID when responding with a split completion to a read of an internal
PI7C9X110 register. These fields are also used for cases when one interface
is in conventional PCI mode.
Reset to 11111111
64-bit not supported
Reset to 0
When this bit is 1, PI7C9X110 is 133MHz capable on its primary bus
interface
Reset to 0 in forward bridge mode or 1 in reverse bridge mode
Page 51 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
18
FUNCTION
Split Completion Discarded
TYPE
RO /
RWC
DESCRIPTION
This bit is a read-only and set to 0 in reverse bridge mode or is read-write in
forward bridge mode
When this is set to 1, a split completion has been discarded by PI7C9X110 at
primary bus because the requester did not accept the split completion
transaction
19
Unexpected Split
Completion
Reset to 0
This bit is set to 0 in forward bridge mode or is read-write in reverse bridge
mode
RWC
When this is set to 1, an unexpected split completion has been received with
the requester ID equaled to the primary bus number, device number, and
function number at the PI7X9X110 primary bus interface
20
Split Completion Overrun
RWC
21
Split Request Delayed
RWC
31:22
Reserved
Reset to 0
When this bit is set to 1, a split completion has been terminated by
PI7C9X110 with either a retry or disconnect at the next ADB due to the
buffer full condition
Reset to 0
When this bit is set to 1, a split request is delayed because PI7C9X110 is not
able to forward the split request transaction to its primary bus due to
insufficient room within the limit specified in the split transaction
commitment limit field of the downstream split transaction control register
Reset to 0
0000000000
RO
7.4.49 UPSTREAM SPLIT TRANSACTION REGISTER – OFFSET 88h
BIT
15:0
FUNCTION
Upstream Split Transaction
Capability
TYPE
RO
31:16
Upstream Split Transaction
Commitment Limit
RW
DESCRIPTION
Upstream Split Transaction Capability specifies the size of the buffer (in the
unit of ADQs) to store split completions for memory read. It applies to the
requesters on the secondary bus in addressing the completers on the primary
bus. The 0010h value shows that the buffer has 16 ADQs or 2K bytes
storage
Reset to 0010h
Upstream Split Transaction Commitment Limit indicates the cumulative
sequence size of the commitment limit in units of ADQs. This field can be
programmed to any value or equal to the content of the split capability field.
For example, if the limit is set to FFFFh, PI7C9X110 is allowed to forward
all split requests of any size regardless of the amount of buffer space
available. The split transaction commitment limit is set to 0010h that is the
same value as the split transaction capability.
Reset to 0010h
7.4.50 DOWNSTREAM SPLIT TRANSACTION REGISTER – OFFSET 8Ch
BIT
15:0
FUNCTION
Downstream Split
Transaction Capability
TYPE
RO
DESCRIPTION
Downstream Split Transaction Capability specifies the size of the buffer (in
the unit of ADQs) to store split completions for memory read. It applies to
the requesters on the primary bus in addressing the completers on the
secondary bus. The 0010h value shows that the buffer has 16 ADQs or 2K
bytes storage
Reset to 0010h
Page 52 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
31:16
FUNCTION
Downstream Split
Transaction Commitment
Limit
TYPE
RW
DESCRIPTION
Downstream Split Transaction Commitment Limit indicates the cumulative
sequence size of the commitment limit in units of ADQs. This field can be
programmed to any value or equal to the content of the split capability field.
For example, if the limit is set to FFFFh, PI7C9X110 is allowed to forward
all split requests of any size regardless of the amount of buffer space
available. The split transaction commitment limit is set to 0010h that is the
same value as the split transaction capability.
Reset to 0010h
7.4.51 POWER MANAGEMENT ID REGISTER – OFFSET 90h
BIT
7:0
FUNCTION
Power Management ID
TYPE
RO
DESCRIPTION
Power Management ID Register
Reset to 01h
7.4.52 NEXT CAPABILITY POINTER REGISTER – OFFSET 90h
BIT
15:8
FUNCTION
Next Pointer
TYPE
RO
DESCRIPTION
Next pointer (point to Subsystem ID and Subsystem Vendor ID)
Reset to A8h
7.4.53 POWER MANAGEMENT CAPABILITY REGISTER – OFFSET 90h
BIT
18:16
FUNCTION
Version Number
TYPE
RO
DESCRIPTION
Version number that complies with revision 2.0 of the PCI Power
Management Interface specification.
19
PME Clock
RO
20
21
Reserved
Device Specific Initialization
(DSI)
RO
RO
24:22
AUX Current
RO
25
D1 Power Management
RO
Reset to 001
D1 power management is not supported
26
D2 Power Management
RO
Reset to 0
D2 power management is not supported
31:27
PME_L Support
RO
Reset to 0
PME_L is supported in D3 cold, D3 hot, and D0 states.
Reset to 010
PME clock is not required for PME_L generation
Reset to 0
Reset to 0
DSI – no special initialization of this function beyond the standard PCI
configuration header is required following transition to the D0 un-initialized
state
Reset to 0
000: 0mA
001: 55mA
010: 100mA
011: 160mA
100: 220mA
101: 270mA
110: 320mA
111: 375mA
Reset to 11001
Page 53 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
7.4.54 POWER MANAGEMENT CONTROL AND STATUS REGISTER – OFFSET 94h
BIT
1:0
FUNCTION
Power State
TYPE
RW
DESCRIPTION
Power State is used to determine the current power state of PI7C9X110. If a
non-implemented state is written to this register, PI7C9X110 will ignore the
write data. When present state is D3 and changing to D0 state by
programming this register, the power state change causes a device reset
without activating the RESET_L of PCI bus interface
00: D0 state
01: D1 state not implemented
10: D2 state not implemented
11: D3 state
Reset to 00
Reset to 000000
0: PME_L assertion is disabled
1: PME_L assertion is enabled
7:2
8
Reserved
PME Enable
RO
RWS
12:9
Data Select
RO
Reset to 0
Data register is not implemented
14:13
Data Scale
RO
Reset to 0000
Data register is not implemented
15
PME Status
RWCS
Reset to 00
PME_L is supported
Reset to 0
7.4.55 PCI-TO-PCI SUPPORT EXTENSION REGISTER – OFFSET 94h
BIT
21:16
22
FUNCTION
Reserved
B2/B3 Support
TYPE
RO
RO
DESCRIPTION
Reset to 000000
0: B2 / B3 not support for D3hot
23
PCI Bus Power/Clock
Control Enable
RO
Reset to 0
0: PCI Bus Power/Clock Disabled
31:24
Data Register
RO
Reset to 0
Data register is not implemented
Reset to 00h
7.4.56 RESERVED REGISTERS – OFFSET 98h – 9Ch
7.4.57 CAPABILITY ID REGISTER – OFFSET A0h
BIT
7:0
FUNCTION
Capability ID
TYPE
RO
DESCRIPTION
Capability ID for Slot Identification. SI is off by default but can be turned on
through EEPROM interface
Reset to 04h
7.4.58 NEXT POINTER REGISTER – OFFSET A0h
BIT
15:8
FUNCTION
Next Pointer
TYPE
RO
DESCRIPTION
Next pointer – points to PCI Express capabilities register
Reset to B0h
Page 54 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
7.4.59 SLOT NUMBER REGISTER – OFFSET A0h
BIT
20:16
FUNCTION
Expansion Slot Number
TYPE
RW
DESCRIPTION
Expansion slot number
21
First In Chassis
RW
Reset to 00000
First in chassis
23:22
Reserved
RO
Reset to 0
Reset to 00
7.4.60 CHASSIS NUMBER REGISTER – OFFSET A0h
BIT
31:24
FUNCTION
Chassis Number
TYPE
RW
DESCRIPTION
Chassis number
Reset to 00h
7.4.61 SECONDARY CLOCK AND CLKRUN CONTROL REGISTER – OFFSET A4h
BIT
1:0
FUNCTION
S_CLKOUT0 Enable
TYPE
RW
DESCRIPTION
S_CLKOUT (Slot 0) Enable for forward bridge mode only
00: enable S_CLKOUT0
01: enable S_CLKOUT0
10: enable S_CLKOUT0
11: disable S_CLKOUT0 and driven LOW
3:2
S_CLKOUT1 Enable
RW
Reset to 00
S_CLKOUT (Slot 1) Enable for forward bridge mode only
00: enable S_CLKOUT1
01: enable S_CLKOUT1
10: enable S_CLKOUT1
11: disable S_CLKOUT1 and driven LOW
5:4
S_CLKOUT2 Enable
RW
Reset to 00
S_CLKOUT (Slot 2) Enable for forward bridge mode only
00: enable S_CLKOUT2
01: enable S_CLKOUT2
10: enable S_CLKOUT2
11: disable S_CLKOUT2 and driven LOW
7:6
S_CLKOUT3 Enable
RW
Reset to 00
S_CLKOUT (Slot 3) Enable for forward bridge mode only
00: enable S_CLKOUT3
01: enable S_CLKOUT3
10: enable S_CLKOUT3
11: disable S_CLKOUT3 and driven LOW
8
S_CLKOUT4 Enable
RW
Reset to 00
S_CLKOUT (Device 1) Enable for forward bridge mode only
0: enable S_CLKOUT4
1: disable S_CLKOUT4 and driven LOW
Reset to 0
Page 55 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
9
FUNCTION
S_CLKOUT5 Enable
TYPE
RW
DESCRIPTION
S_CLKOUT (Device 2) Enable for forward bridge mode only
0: enable S_CLKOUT5
1: disable S_CLKOUT5 and driven LOW
10
S_CLKOUT6 Enable
Reset to 0
S_CLKOUT (Device 3) Enable for forward bridge mode only
RW
0: enable S_CLKOUT6
1: disable S_CLKOUT6 and driven LOW
11
S_CLKOUT7 Enable
Reset to 0
S_CLKOUT (Device 4) Enable for forward bridge mode only
RW
0: enable S_CLKOUT7
1: disable S_CLKOUT7 and driven LOW
12
S_CLKOUT8 Enable
Reset to 0
S_CLKOUT (the bridge) Enable for forward bridge mode only
RW
0: enable S_CLKOUT8
1: disable S_CLKOUT8 and driven LOW
13
Secondary Clock Stop Status
Reset to 0
Secondary clock stop status
RO
0: secondary clock not stopped
1: secondary clock stopped
14
Secondary Clkrun Protocol
Enable
RW
15
Clkrun Mode
RW
31:16
Reserved
RO
Reset to 0
0: disable protocol
1: enable protocol
Reset to 0
0: Stop the secondary clock only when bridge is at D3hot state
1: Stop the secondary clock whenever the secondary bus is idle and there are
no requests from the primary bus
Reset to 0
Reset to 0000h
7.4.62 CAPABILITY ID REGISTER – OFFSET A8h
BIT
7:0
FUNCTION
Capability ID
TYPE
RO
DESCRIPTION
Capability ID for subsystem ID and subsystem vendor ID
Reset to 0Dh
7.4.63 NEXT POINTER REGISTER – OFFSET A8h
BIT
15:8
FUNCTION
Next Item Pointer
TYPE
RO
DESCRIPTION
Next item pointer (point to PCI Express Capability by default but can be
programmed to A0h if Slot Identification Capability is enabled)
Reset to B0h
7.4.64 RESERVED REGISTER – OFFSET A8h
BIT
31:16
FUNCTION
Reserved
TYPE
RO
DESCRIPTION
Reset to 0000h
Page 56 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
7.4.65 SUBSYSTEM VENDOR ID REGISTER – OFFSET ACh
BIT
15:0
FUNCTION
Subsystem Vendor ID
TYPE
RO
DESCRIPTION
Subsystem vendor ID identifies the particular add-in card or subsystem
Reset to 00h
7.4.66 SUBSYSTEM ID REGISTER – OFFSET ACh
BIT
31:16
FUNCTION
Subsystem ID
TYPE
RO
DESCRIPTION
Subsystem ID identifies the particular add-in card or subsystem
Reset to 00h
7.4.67 PCI EXPRESS CAPABILITY ID REGISTER – OFFSET B0h
BIT
7:0
FUNCTION
PCI Express Capability ID
TYPE
RO
DESCRIPTION
PCI Express capability ID
Reset to 10h
7.4.68 NEXT CAPABILITY POINTER REGISTER – OFFSET B0h
BIT
15:8
FUNCTION
Next Item Pointer
TYPE
RO
DESCRIPTION
Next item pointer (points to VPD register)
Reset to D8h
7.4.69 PCI EXPRESS CAPABILITY REGISTER – OFFSET B0h
BIT
19:16
23:20
FUNCTION
Capability Version
Device / Port Type
24
29:25
31:30
Slot Implemented
Interrupt Message Number
Reserved
TYPE
RO
RO
DESCRIPTION
Reset to 1h
0000: PCI Express endpoint device
0001: Legacy PCI Express endpoint device
0100: Root port of PCI Express root complex
0101: Upstream port of PCI Express switch
0110: Downstream port of PCI Express switch
0111: PCI Express to PCI bridge
1000: PCI to PCI Express bridge
Others: Reserved
Reset to 7h for Forward Bridge or 8h for Reverse Bridge
Reset to 0 for Forward Bridge or 1 for Reverse Bridge
Reset to 0h
Reset to 0
RO
RO
RO
7.4.70 DEVICE CAPABILITY REGISTER – OFFSET B4h
BIT
2:0
FUNCTION
Maximum Payload Size
TYPE
RO
DESCRIPTION
000: 128 bytes
001: 256 bytes
010: 512 bytes
011: 1024 bytes
100: 2048 bytes
101: 4096 bytes
110: reserved
111: reserved
Reset to 001
Page 57 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
4:3
FUNCTION
Phantom Functions
TYPE
RO
DESCRIPTION
No phantom functions supported
5
8-bit Tag Field
RO
Reset to 00
8-bit tag field supported
8:6
Endpoint L0’s Latency
RO
Reset to 1
Endpoint L0’s acceptable latency
000: less than 64 ns
001: 64 – 128 ns
010: 128 – 256 ns
011: 256 – 512 ns
100: 512 ns – 1 us
101: 1 – 2 us
110: 2 – 4 us
111: more than 4 us
11:9
Endpoint L1’s Latency
Reset to 000
Endpoint L1’s acceptable latency
RO
000: less than 1 us
001: 1 – 2 us
010: 2 – 4 us
011: 4 – 8 us
100: 8 – 16 us
101: 16 – 32 us
110: 32 – 64 us
111: more than 64 us
12
13
14
Attention Button Present
Attention Indicator Present
Power Indicator Present
Reset to 000
0: If Hot Plug is disabled
1: If Hot Plug is enabled at Forward Bridge
RO
Reset to 0 when hot-plug is disabled or 1 when hot-plug is enabled through
strapping.
0: If Hot Plug is disabled
1: If Hot Plug is enable at Forward Bridge
RO
Reset to 0 when hot-plug is disabled or 1 when hot-plug is enabled through
strapping.
0: If Hot Plug is disabled
1: If Hot Plug is enable at Forward Bridge
RO
17:15
25:18
Reserved
Captured Slot Power Limit
Value
RO
RO
Reset to 0 when hot-plug is disabled or 1 when hot-plug is enabled through
strapping.
Reset to 000
These bits are set by the Set_Slot_Power_Limit message
27:26
Captured Slot Power Limit
Scale
RO
Reset to 00h
This value is set by the Set_Slot_Power_Limit message
31:28
Reserved
RO
Reset to 00
Reset to 0h
7.4.71 DEVICE CONTROL REGISTER – OFFSET B8h
BIT
0
1
2
FUNCTION
Correctable Error Reporting
Enable
Non-Fatal Error Reporting
Enable
Fatal Error Reporting Enable
TYPE
RW
DESCRIPTION
Reset to 0h
RW
Reset to 0h
RW
Reset to 0h
Page 58 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
3
4
FUNCTION
Unsupported Request
Reporting Enable
Relaxed Ordering Enable
7:5
Max Payload Size
TYPE
RW
RO
DESCRIPTION
Reset to 0h
Relaxed Ordering disabled
Reset to 0h
This field sets the maximum TLP payload size for the PI7C9X110
RW
000: 128 bytes
001: 256 bytes
010: 512 bytes
011:1024 bytes
100: 2048 bytes
101: 4096 bytes
110: reserved
111: reserved
8
9
Extended Tag Field Enable
Phantom Functions Enable
RW
RO
Reset to 000
Reset to 0
Phantom functions not supported
10
Auxiliary Power PM Enable
RO
Reset to 0
Auxiliary power PM not supported
11
No Snoop Enable
RO
Reset to 0
Bridge never sets the No Snoop attribute in the transaction it initiates
14:12
Maximum Read Request
Size
RW
Reset to 0
This field sets the maximum Read Request Size for the device as a requester
000: 128 bytes
001: 256 bytes
010: 512 bytes
011: 1024 bytes
100: 2048 bytes
101: 4096 bytes
110: reserved
111: reserved
15
Configuration Retry Enable
Reset to 2h
Reset to 0
RW
7.4.72 DEVICE STATUS REGISTER – OFFSET B8h
BIT
16
17
18
19
20
21
FUNCTION
Correctable Error Detected
Non-Fatal Error Detected
Fatal Error Detected
Unsupported Request
Detected
AUX Power Detected
Transaction Pending
31:22
Reserved
TYPE
RWC
RWC
RWC
RWC
RO
RO
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 1
0: No transaction is pending on transaction layer interface
1: Transaction is pending on transaction layer interface
Reset to 0
Reset to 0000000000
RO
7.4.73 LINK CAPABILITY REGISTER – OFFSET BCh
BIT
FUNCTION
TYPE
DESCRIPTION
Page 59 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
3:0
FUNCTION
Maximum Link Speed
TYPE
RO
DESCRIPTION
Indicates the maximum speed of the Express link
0001: 2.5Gb/s link
9:4
Maximum Link Width
Reset to 1
Indicates the maximum width of the Express link (x1 at reset)
RO
000000: reserved
000001: x1
000010: x2
000100: x4
001000: x8
001100: x12
010000: x16
100000: x32
11:10
ASPM Support
Reset to 000001
This field indicates the level of Active State Power Management Support
RO
00: reserved
01: L0’s entry supported
10: reserved
11: L0’s and L1’s supported
14:12
17:15
23:18
31:24
L0’s Exit Latency
L1’s Exit Latency
Reserved
Port Number
Reset to 11
Reset to 3h
Reset to 0h
Reset to 0h
Reset to 00h
RO
RO
RO
RO
7.4.74 LINK CONTROL REGISTER – OFFSET C0h
BIT
1:0
FUNCTION
ASPM Control
TYPE
RW
DESCRIPTION
This field controls the level of ASPM supported on the Express link
00: disabled
01: L0’s entry enabled
10: L1’s entry enabled
11: L0’s and L1’s entry enabled
Reset to 00
Reset to 0
Read completion boundary not supported
2
3
Reserved
Read Completion Boundary
(RCB)
RO
RO
4
Link Disable
RO /
RW
5
Retrain Link
RO /
RW
6
Common Clock
Configuration
Extended Sync
Reserved
RW
Reset to 0
Reset to 0
RW
RO
Reset to 0
Reset to 00h
7
15:8
Reset to 0
RO for Forward Bridge
Reset to 0
RO for Forward Bridge
7.4.75 LINK STATUS REGISTER – OFFSET C0h
BIT
FUNCTION
TYPE
DESCRIPTION
Page 60 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
19:16
FUNCTION
Link Speed
TYPE
RO
DESCRIPTION
This field indicates the negotiated speed of the Express link
001: 2.5Gb/s link
25:20
Negotiated Link Width
RO
26
27
28
31:29
Link Train Error
Link Training
Slot Clock Configuration
Reserved
RO
RO
RO
RO
Reset to 1h
000000: reserved
000001: x1
000010: x2
000100: x4
001000: x8
001100: x12
010000: x16
100000: x32
Reset to 000001
Reset to 0
Reset to 0
Reset to 1
Reset to 0
7.4.76 SLOT CAPABILITY REGISTER – OFFSET C4h
BIT
0
1
2
3
4
5
6
14:7
16:15
18:17
31:19
FUNCTION
Attention Button Present
Power Controller Present
MRL Sensor Present
Attention Indicator Present
Power Indicator Present
Hot Plug Surprise
Hot Plug Capable
Slot Power Limit Value
Slot Power Limit Scale
Reserved
Physical Slot Number
TYPE
RO
DESCRIPTION
0: If Hot Plug is disabled
1: If Hot Plug is enabled at reverse bridge
Reset to 0 when hot-plug is disabled or 1 when hot-plug is enabled through
strapping.
Reset to 0
0: If Hot Plug is disabled
1: If Hot Plug is enabled at reverse bridge
RO
RO
Reset to 0 when hot-plug is disabled or 1 when hot-plug is enabled through
strapping.
0: If Hot Plug is disabled
1: If Hot Plug is enabled at reverse bridge
RO
Reset to 0 when hot-plug is disabled or 1 when hot-plug is enabled through
strapping.
0: If Hot Plug is disabled
1: If Hot Plug is enabled at reverse bridge
RO
Reset to 0 when hot-plug is disabled or 1 when hot-plug is enabled through
strapping.
Reset to 0
0: If Hot Plug is disabled
1: If Hot Plug is enabled at reverse bridge
RO
RO
Reset to 0 when hot-plug is disabled or 1 when hot-plug is enabled through
strapping.
Reset to 00h
Reset to 00
Reset to 00
Reset to 0
RO
RO
RO
RO
7.4.77 SLOT CONTROL REGISTER – OFFSET C8h
BIT
0
1
FUNCTION
Attention Button Present
Enable
Power Fault Detected Enable
TYPE
RW
RW
DESCRIPTION
Reset to 0
Reset to 0
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PCIe-to-PCI Reversible Bridge
BIT
2
3
4
5
7:6
9:8
10
15:11
FUNCTION
MRL Sensor Changed
Enable
Presence Detect Changed
Enable
Command Completed
Interrupt Enable
Hot Plug Interrupt Enable
Attention Indicator Control
Power Indicator Control
Power Controller Control
Reserved
TYPE
RW
DESCRIPTION
Reset to 0
RW
Reset to 0
RW
Reset to 0
RW
RW
RW
RW
RO
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
7.4.78 SLOT STATUS REGISTER – OFFSET C8h
BIT
16
17
18
19
20
21
22
31:23
FUNCTION
Attention Button Pressed
Power Fault Detected
MRL Sensor Changed
Presence Detect Changed
Command Completed
MRL Sensor State
Presence Detect State
Reserved
TYPE
RO
RO
RO
RO
RO
RO
RO
RO
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
7.4.79 XPIP CONFIGURATION REGISTER 0 – OFFSET CCh
BIT
0
1
2
3
4
7:5
12:8
15:13
31:16
FUNCTION
Hot Reset Enable
Loopback Function Enable
Cross Link Function Enable
Software Direct to
Configuration State when in
LTSSM state
Internal Selection for Debug
Mode
Negotiate Lane Number of
Times
TS1 Number Counter
Reserved
LTSSM Enter L1 Timer
Default Value
TYPE
RW
RW
RW
RW
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
RW
Reset to 0
RW
Reset to 3h
RW
RO
RW
Reset to 10h
Reset to 0
Reset to 0400h
7.4.80 XPIP CONFIGURATION REGISTER 1 – OFFSET D0h
BIT
9:0
15:10
31:16
FUNCTION
L0’s Lifetime Timer
Reserved
L1 Lifetime Timer
TYPE
RW
RO
RW
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
7.4.81 XPIP CONFIGURATION REGISTER 2 – OFFSET D4h
BIT
7:0
FUNCTION
CDR Recovery Time (in the
number of FTS order sets)
14:8
15
22:16
23
L0’s Exit to L0 Latency
Reserved
L1 Exit to L0 Latency
Reserved
TYPE
RW
RW
RO
RW
RO
DESCRIPTION
Reset to 54h
A Fast Training Sequence order set composes of one K28.5 (COM) Symbol
and three K28.1 Symbols.
Reset to 2h
Reset to 0
Reset to 19h
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
7.4.82 HOT SWAP SWITCH DEBOUNCE COUNTER – OFFSET D4h
BIT
31:24
FUNCTION
Hot Swap Debounce Counter
TYPE
RO /
RW
DESCRIPTION
If Hot Swap is enabled, this counter is read-write able. This counter is read
only (RO) if Hot Swap is disabled
00h: 1ms
01h: 2ms
02h: 3ms
03h: 4ms
…
FFh: 256ms
Reset to 0
7.4.83 CAPABILITY ID REGISTER – OFFSET D8h
BIT
7:0
FUNCTION
Capability ID for VPD
Register
TYPE
RO
DESCRIPTION
Reset to 03h
7.4.84 NEXT POINTER REGISTER – OFFSET D8h
BIT
15:8
FUNCTION
Next Pointer
TYPE
RO
DESCRIPTION
Next pointer (F0h, points to MSI capabilities)
Reset to F0h
7.4.85 VPD REGISTER – OFFSET D8h
BIT
17:16
23:18
30:24
31
FUNCTION
Reserved
VPD Address for
Read/Write Cycle
Reserved
VPD Operation
TYPE
RO
RW
RO
RW
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
0: Generate a read cycle from the EEPROM at the VPD address specified in
bits [7:2] of offset D8h. This bit remains at ‘0’ until EEPROM cycle is
finished, after which the bit is then set to ‘1’. Data for reads is available at
register ECh.
1: Generate a write cycle to the EEPROM at the VPD address specified in
bits [7:2] of offset D8h. This bit remains at ‘1’ until EEPROM cycle is
finished, after which it is then cleared to ‘0’.
Reset to 0
7.4.86 VPD DATA REGISTER – OFFSET DCh
BIT
31:0
FUNCTION
VPD Data
TYPE
RW
DESCRIPTION
VPD Data (EEPROM data [address + 0x40])
The least significant byte of this register corresponds to the byte of VPD at
the address specified by the VPD address register. The data read form or
written to this register uses the normal PCI byte transfer capabilities.
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
7.4.87 RESERVED REGISTERS – OFFSET E0h – ECh
7.4.88 MESSAGE SIGNALED INTERRUPTS ID REGISTER – F0h
BIT
7:0
FUNCTION
Capability ID for MSI
Registers
TYPE
RO
DESCRIPTION
Reset to 05h
7.4.89 NEXT CAPABILITIES POINTER REGISTER – F0h
BIT
15:8
FUNCTION
Next Pointer
TYPE
RO
DESCRIPTION
Next pointer (00h indicates the end of capabilities)
Reset to 00h
7.4.90 MESSAGE CONTROL REGISTER – OFFSET F0h
BIT
16
FUNCTION
MSI Enable
TYPE
RW
19:17
Multiple Message Capable
RO
22:20
Multiple Message Enable
RW
23
31:24
64-bit Address Capable
Reserved
RW
RO
DESCRIPTION
0: Disable MSI and default to INTx for interrupt
1: Enable MSI for interrupt service and ignore INTx interrupt pins
000: 1 message requested
001: 2 messages requested
010: 4 messages requested
011: 8 messages requested
100: 16 messages requested
101: 32 messages requested
110: reserved
111: reserved
Reset to 000
000: 1 message requested
001: 2 messages requested
010: 4 messages requested
011: 8 messages requested
100: 16 messages requested
101: 32 messages requested
110: reserved
111: reserved
Reset to 000
Reset to 1
Reset to 00h
7.4.91 MESSAGE ADDRESS REGISTER – OFFSET F4h
BIT
1:0
31:2
FUNCTION
Reserved
System Specified Message
Address
TYPE
RO
RW
DESCRIPTION
Reset to 00
Reset to 0
7.4.92 MESSAGE UPPER ADDRESS REGISTER – OFFSET F8h
BIT
31:0
FUNCTION
System Specified Message
Upper Address
TYPE
RW
DESCRIPTION
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
7.4.93 MESSAGE DATA REGISTER – OFFSET FCh
BIT
15:0
31:16
FUNCTION
System Specified Message
Data
Reserved
TYPE
RW
RO
DESCRIPTION
Reset to 0
Reset to 0
7.4.94 ADVANCE ERROR REPORTING CAPABILITY ID REGISTER – OFFSET 100h
BIT
15:0
FUNCTION
Advance Error Reporting
Capability ID
TYPE
RO
DESCRIPTION
Reset to 0001h
7.4.95 ADVANCE ERROR REPORTING CAPABILITY VERSION REGISTER – OFFSET 100h
BIT
19:16
FUNCTION
Advance Error Reporting
Capability Version
TYPE
RO
DESCRIPTION
Reset to 1h
7.4.96 NEXT CAPABILITY OFFSET REGISTER – OFFSET 100h
BIT
31:20
FUNCTION
Next Capability Offset
TYPE
RO
DESCRIPTION
Next capability offset (150h points to VC capability)
Reset to 150h
7.4.97 UNCORRECTABLE ERROR STATUS REGISTER – OFFSET 104h
BIT
0
3:1
4
11:5
12
13
14
15
16
17
18
19
20
31:21
FUNCTION
Training Error Status
Reserved
Data Link Protocol Error
Status
Reserved
Poisoned TLP Status
Flow Control Protocol Error
Status
Completion Timeout Status
Completer Abort Status
Unexpected Completion
Status
Receiver Overflow Status
Malformed TLP Status
ECRC Error Status
Unsupported Request Error
Status
Reserved
TYPE
RWCS
RO
RWCS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
RO
RWCS
RWCS
Reset to 0
Reset to 0
Reset to 0
RWCS
RWCS
RWCS
Reset to 0
Reset to 0
Reset to 0
RWCS
RWCS
RWCS
RWCS
Reset to 0
Reset to 0
Reset to 0
Reset to 0
RO
Reset to 0
7.4.98 UNCORRECTABLE ERROR MASK REGISTER – OFFSET 108h
BIT
0
3:1
4
11:5
12
13
FUNCTION
Training Error Mast
Reserved
Data Link Protocol Error
Mask
Reserved
Poisoned TLP Mask
Flow Control Protocol Error
Mask
TYPE
RWS
RO
RWS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
RO
RWS
RWS
Reset to 0
Reset to 0
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
14
15
16
17
18
19
20
31:21
FUNCTION
Completion Timeout Mask
Completion Abort Mask
Unexpected Completion
Mask
Receiver Overflow Mask
Malformed TLP Mask
ECRC Error Mask
Unsupported Request Error
Mask
Reserved
TYPE
RWS
RWS
RWS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
RWS
RWS
RWS
RWS
Reset to 0
Reset to 0
Reset to 0
Reset to 0
RO
Reset to 0
7.4.99 UNCORRECTABLE ERROR SEVERITY REGISTER – OFFSET 10Ch
BIT
0
3:1
4
11:5
12
13
14
15
16
17
18
19
20
31:21
FUNCTION
Training Error Severity
Reserved
Data Link Protocol Error
Severity
Reserved
Poisoned TLP Severity
Flow Control Protocol Error
Severity
Completion Timeout
Severity
Completer Abort Severity
Unexpected Completion
Severity
Receiver Overflow Severity
Malformed TLP Severity
ECRC Error Severity
Unsupported Request Error
Severity
Reserved
TYPE
RWS
RO
RWS
DESCRIPTION
Reset to 1
Reset to 0
Reset to 1
RO
RWS
RWS
Reset to 0
Reset to 0
Reset to 1
RWS
Reset to 0
RWS
RWS
Reset to 0
Reset to 0
RWS
RWS
RWS
RWS
Reset to 1
Reset to 1
Reset to 0
Reset to 0
RO
Reset to 0
7.4.100 CORRECTABLE ERROR STATUS REGISTER – OFFSET 110h
BIT
0
5:1
6
7
8
11:9
12
31:13
FUNCTION
Receiver Error Status
Reserved
Bad TLP Status
Bad DLLP Status
REPLAY_NUM Rollover
Status
Reserved
Replay Timer Timeout
Status
Reserved
TYPE
RWCS
RO
RWCS
RWCS
RWCS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
RO
RWCS
Reset to 0
Reset to 0
RO
Reset to 0
7.4.101 CORRECTABLE ERROR MASK REGISTER – OFFSET 114h
BIT
0
5:1
6
7
8
11:9
12
31:13
FUNCTION
Receiver Error Mask
Reserved
Bad TLP Mask
Bad DLLP Mask
REPLAY_NUM Rollover
Mask
Reserved
Replay Timer Timeout Mask
Reserved
TYPE
RWS
RO
RWS
RWS
RWS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
RO
RWS
RO
Reset to 0
Reset to 0
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
7.4.102 ADVANCED ERROR CAPABILITIES AND CONTROL REGISTER – OFFSET 118h
BIT
4:0
5
6
7
8
31:9
FUNCTION
First Error Pointer
ECRC Generation Capable
ECRC Generation Enable
ECRC Check Capable
ECRC Check Enable
Reserved
TYPE
ROS
RO
RWS
RO
RWS
RO
DESCRIPTION
Reset to 0h
Reset to 1
Reset to 0
Reset to 1
Reset to 0
Reset to 0
7.4.103 HEADER LOG REGISTER 1 – OFFSET 11Ch
BIT
7:0
15:8
23:16
31:24
FUNCTION
Header Byte 3
Header Byte 2
Header Byte 1
Header Byte 0
TYPE
ROS
ROS
ROS
ROS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
7.4.104 HEADER LOG REGISTER 2 – OFFSET 120h
BIT
7:0
15:8
23:16
31:24
FUNCTION
Header Byte 7
Header Byte 6
Header Byte 5
Header Byte 4
TYPE
ROS
ROS
ROS
ROS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
7.4.105 HEADER LOG REGISTER 3 – OFFSET 124h
BIT
7:0
15:8
23:16
31:24
FUNCTION
Header Byte 11
Header Byte 10
Header Byte 9
Header Byte 8
TYPE
ROS
ROS
ROS
ROS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
7.4.106 HEADER LOG REGISTER 4 – OFFSET 128h
BIT
7:0
15:8
23:16
31:24
FUNCTION
Header Byte 15
Header Byte 14
Header Byte 13
Header Byte 12
TYPE
ROS
ROS
ROS
ROS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
7.4.107 SECONDARY UNCORRECTABLE ERROR STATUS REGISTER – OFFSET 12Ch
BIT
0
1
2
3
4
5
FUNCTION
Target Abort on Split
Completion Status
Master Abort on Split
Completion Status
Received Target Abort
Status
Received Master Abort
Status
Reserved
Unexpected Split
Completion Error Status
TYPE
RWCS
DESCRIPTION
Reset to 0
RWCS
Reset to 0
RWCS
Reset to 0
RWCS
Reset to 0
RO
RWCS
Reset to 0
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
6
7
8
9
10
11
12
13
31:14
FUNCTION
Uncorrectable Split
Completion Message Data
Error Status
Uncorrectable Data Error
Status
Uncorrectable Attribute
Error Status
Uncorrectable Address Error
Status
Delayed Transaction Discard
Timer Expired Status
PERR_L Assertion Detected
Status
SERR_L Assertion Detected
Status
Internal Bridge Error Status
Reserved
TYPE
RWCS
DESCRIPTION
Reset to 0
RWCS
Reset to 0
RWCS
Reset to 0
RWCS
Reset to 0
RWCS
Reset to 0
RWCS
Reset to 0
RWCS
Reset to 0
RWCS
RO
Reset to 0
Reset to 0
7.4.108 SECONDARY UNCORRECTABLE ERROR MASK REGISTER – OFFSET 130h
BIT
0
1
2
3
4
5
6
7
8
9
10
11
12
13
31:14
FUNCTION
Target Abort on Split
Completion Mask
Master Abort on Split
Completion Mask
Received Target Abort Mask
Received Master Abort
Mask
Reserved
Unexpected Split
Completion Error Mask
Uncorrectable Split
Completion Message Data
Error Mask
Uncorrectable Data Error
Mask
Uncorrectable Attribute
Error Mask
Uncorrectable Address Error
Mask
Delayed Transaction Discard
Timer Expired Mask
PERR_L Assertion Detected
Mask
SERR_L Assertion Detected
Mask
Internal Bridge Error Mask
Reserved
TYPE
RWS
DESCRIPTION
Reset to 0
RWS
Reset to 0
RWS
RWS
Reset to 0
Reset to 1
RO
RWS
Reset to 0
Reset to 1
RWS
Reset to 0
RWS
Reset to 1
RWS
Reset to 1
RWS
Reset to 1
RWS
Reset to 1
RWS
Reset to 0
RWS
Reset to 1
RWS
RO
Reset to 0
Reset to 0
7.4.109 SECONDARY UNCORRECTABLE ERROR SEVERITY REGISTER – OFFSET 134h
BIT
0
1
2
3
4
FUNCTION
Target Abort on Split
Completion Severity
Master Abort on Split
Completion Severity
Received Target Abort
Severity
Received Master Abort
Severity
Reserved
TYPE
RWS
DESCRIPTION
Reset to 0
RWS
Reset to 0
RWS
Reset to 0
RWS
Reset to 0
RO
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
5
6
7
8
9
10
11
12
13
31:14
FUNCTION
Unexpected Split
Completion Error Severity
Uncorrectable Split
Completion Message Data
Error Severity
Uncorrectable Data Error
Severity
Uncorrectable Attribute
Error Severity
Uncorrectable Address Error
Severity
Delayed Transaction Discard
Timer Expired Severity
PERR_L Assertion Detected
Severity
SERR_L Assertion Detected
Severity
Internal Bridge Error
Severity
Reserved
TYPE
RWS
DESCRIPTION
Reset to 0
RWS
Reset to 1
RWS
Reset to 0
RWS
Reset to 1
RWS
Reset to 1
RWS
Reset to 0
RWS
Reset to 0
RWS
Reset to 1
RWS
Reset to 0
RO
Reset to 0
7.4.110 SECONDARY ERROR CAPABILITY AND CONTROL REGISTER – OFFSET 138h
BIT
4:0
31:5
FUNCTION
Secondary First Error
Pointer
Reserved
TYPE
ROW
RO
DESCRIPTION
Reset to 0
Reset to 0
7.4.111 SECONDARY HEADER LOG REGISTER – OFFSET 13Ch – 148h
BIT
35:0
FUNCTION
Transaction Attribute
TYPE
ROS
39:36
Transaction Command
Lower
ROS
43:40
Transaction Command
Upper
ROS
63:44
95:64
Reserved
Transaction Address
ROS
ROS
127:96
Transaction Address
ROS
DESCRIPTION
Transaction attribute, CBE [3:0] and AD [31:0] during attribute phase
Reset to 0
Transaction command lower, CBE [3:0] during first address phase
Reset to 0
Transaction command upper, CBE [3:0] during second address phase of
DAC transaction
Reset to 0
Reset to 0
Transaction address, AD [31:0] during first address phase
Reset to 0
Transaction address, AD [31:0] during second address phase of DAC
transaction
Reset to 0
7.4.112 RESERVED REGISTER – OFFSET 14Ch
7.4.113 VC CAPABILITY ID REGISTER – OFFSET 150h
BIT
15:0
FUNCTION
VC Capability ID
TYPE
RO
DESCRIPTION
Reset to 0002h
7.4.114 VC CAPABILITY VERSION REGISTER – OFFSET 150h
Page 70 of 144
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
19:16
FUNCTION
VC Capability Version
TYPE
RO
DESCRIPTION
Reset to 1h
7.4.115 NEXT CAPABILITY OFFSET REGISTER – OFFSET 150h
BIT
31:20
FUNCTION
Next Capability Offset
TYPE
RO
DESCRIPTION
Next capability offset – the end of capabilities
Reset to 0
7.4.116 PORT VC CAPABILITY REGISTER 1 – OFFSET 154h
BIT
2:0
3
6:4
7
9:8
11:10
31:12
FUNCTION
Extended VC Count
Reserved
Low Priority Extended VC
Count
Reserved
Reference Clock
Port Arbitration Table Entry
Size
Reserved
TYPE
RO
RO
RO
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
RO
RO
RO
Reset to 0
Reset to 0
Reset to 0
RO
Reset to 0
7.4.117 PORT VC CAPABILITY REGISTER 2 – OFFSET 158h
BIT
7:0
23:8
31:24
FUNCTION
VC Arbitration Capability
Reserved
VC Arbitration Table Offset
TYPE
RO
RO
RO
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
7.4.118 PORT VC CONTROL REGISTER – OFFSET 15Ch
BIT
0
3:1
15:4
FUNCTION
Load VC Arbitration Table
VC Arbitration Select
Reserved
TYPE
RO
RO
RO
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
7.4.119 PORT VC STATUS REGISTER – OFFSET 15Ch
BIT
16
31:17
FUNCTION
VC Arbitration Table Status
Reserved
TYPE
RO
RO
DESCRIPTION
Reset to 0
Reset to 0
7.4.120 VC0 RESOURCE CAPABILITY REGISTER – OFFSET 160h
BIT
7:0
13:8
14
15
22:16
23
31:24
FUNCTION
Port Arbitration Capability
Reserved
Advanced Packet Switching
Reject Snoop Transactions
Maximum Time Slots
Reserved
Port Arbitration Table Offset
TYPE
RO
RO
RO
RO
RO
RO
RO
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to0
Reset to 0
Reset to 0
Reset to 0
7.4.121 VC0 RESOURCE CONTROL REGISTER – OFFSET 164h
BIT
FUNCTION
TYPE
DESCRIPTION
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
0
FUNCTION
TC / VC Map
TYPE
RO
7:1
TC / VC Map
RW
15:8
16
19:17
23:20
26:24
30:27
31
Reserved
Load Port Arbitration Table
Port Arbitration Select
Reserved
VC ID
Reserved
VC Enable
RO
RO
RO
RO
RO
RO
RO
DESCRIPTION
For TC0
Reset to 1
For TC7 to TC1
Reset to 7Fh
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 1
7.4.122 VC0 RESOURCE STATUS REGISTER – OFFSET 168h
BIT
0
1
31:2
FUNCTION
Port Arbitration Table 1
VC0 Negotiation Pending
Reserved
TYPE
RO
RO
RO
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
7.4.123 RESERVED REGISTERS – OFFSET 16Ch – 300h
7.4.124 EXTRA GPI/GPO DATA AND CONTROL REGISTER – OFFSET 304h
BIT
3:0
FUNCTION
Extra GPO
TYPE
RWC
7:4
Extra GPO
RWS
11:8
Extra GPO enable
RWC
15:12
Extra GPO enable
RWS
19:16
Extra GPI
RO
31:20
Reserved
RO
DESCRIPTION
GPO [3:0], write 1 to clear
Reset to 0
GPO [3:0], write 1 to set
Reset to 0
GPO [3:0] enable, write 1 to clear
Reset to 0
GPO [3:0] enable, write 1 to set
Reset to 0
Extra GPI [3:0] Data Register
Reset to 0
Reset to 0
7.4.125 RESERVED REGISTERS – OFFSET 308h – 30Ch
7.4.126 REPLAY AND ACKNOWLEDGE LATENCY TIMERS – OFFSET 310h
BIT
11:0
FUNCTION
Replay Timer
12
Replay Timer Enable
RW
15:13
29:16
Reserved
Acknowledge Latency Timer
RO
RW
30
Acknowledge Latency Timer
Enable
Reserved
RO
31
TYPE
RW
RO
DESCRIPTION
Replay Timer
Reset to 0
Replay Timer Enable
Reset to 0
Reset to 0
Acknowledge Latency Timer
Reset to 0
Acknowledge Latency Timer Enable
Reset to 0
Reset to 0
7.4.127 RESERVED REGISTERS – OFFSET 314h – FFCh
Page 72 of 144
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PI7C9X110
PCIe-to-PCI Reversible Bridge
7.5
PCI CONFIGURATION REGISTERS FOR NON-TRANSPARENT BRIDGE
MODE
The following section describes the configuration space when the device is in non-transparent bridge mode. The
descriptions for different register type are listed as follow:
Register Type
RO
ROS
RW
RWC
RWS
RWCS
7.5.1
VENDOR ID – OFFSET 00h
BIT
15:0
7.5.2
FUNCTION
Vendor ID
TYPE
RO
DESCRIPTION
Identifies Pericom as the vendor of this device. Returns 12D8h when read.
TYPE
RO
DESCRIPTION
Identifies this device as the PI7C9X110. Returns E110 when read.
DEVICE ID – OFFSET 00h
BIT
31:16
7.5.3
Descriptions
Read Only
Read Only and Sticky
Read/Write
Read/Write “1” to clear
Read/Write and Sticky
Read/Write “1” to clear and Sticky
FUNCTION
Device ID
COMMAND REGISTER – OFFSET 04h
BIT
0
FUNCTION
I/O Space Enable
TYPE
RW
1
Memory Space Enable
RW
2
Bus Master Enable
RW
3
Special Cycle Enable
RO
4
Memory Write and
Invalidate Enable
RO
5
VGA Palette Snoop Enable
RO /
RW
DESCRIPTION
0: Ignore I/O transactions on the primary interface
1: Enable response to memory transactions on the primary interface
Reset to 0
0: Ignore memory read transactions on the primary interface
1: Enable memory read transactions on the primary interface
Reset to 0
0: Do not initiate memory or I/O transactions on the primary interface and
disable response to memory and I/O transactions on the secondary interface
1: Enable the bridge to operate as a master on the primary interfaces for
memory and I/O transactions forwarded from the secondary interface.
Reset to 0
0: PI7C9X110 does not respond as a target to Special Cycle transactions, so
this bit is defined as Read-Only and must return 0 when read
Reset to 0
0: PI7C9X110 does not originate a Memory Write and Invalidate
transaction. Implements this bit as Read-Only and returns 0 when read
(unless forwarding a transaction for another master).
Reset to 0
This bit applies to reverse bridge only.
0: Ignore VGA palette access on the primary
1: Enable positive decoding response to VGA palette writes on the primary
interface with I/O address bits AD [9:0] equal to 3C6h, 3C8h, and 3C9h
(inclusive of ISA alias; AD [15:0] are not decoded and may be any value)
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
7.5.4
BIT
6
FUNCTION
Parity Error Response
Enable
TYPE
RW
7
Wait Cycle Control
RO
8
SERR_L Enable Bit
RW
9
Fast Back-to-Back Enable
RO
10
Interrupt Disable
RO /
RW
15:11
Reserved
RO
DESCRIPTION
0: May ignore any parity error that is detected and take its normal action
1: This bit if set, enables the setting of Master Data Parity Error bit in the
Status Register when poisoned TLP received or parity error is detected and
takes its normal action
Reset to 0
Wait cycle control not supported
Reset to 0
0: Disable
1: Enable PI7C9X110 in forward bridge mode to report non-fatal or fatal
error message to the Root Complex. Also, in reverse bridge mode to assert
SERR_L on the primary interface
Reset to 0
Fast back-to-back enable not supported
Reset to 0
This bit applies to reverse bridge only.
0: INTA_L, INTB_L, INTC_L, and INTD_L can be asserted on PCI
interface
1: Prevent INTA_L, INTB_L, INTC_L, and INTD_L from being asserted on
PCI interface
Reset to 0
Reset to 00000
PRIMARY STATUS REGISTER – OFFSET 04h
BIT
18:16
19
FUNCTION
Reserved
Primary Interrupt Status
TYPE
RO
RO
DESCRIPTION
Reset to 000
0: No INTx interrupt message request pending in PI7C9X110 primary
1: INTx interrupt message request pending in PI7C9X110 primary
20
Capability List Capable
RO
Reset to 0
1: PI7C9X110 supports the capability list (offset 34h in the pointer to the
data structure)
21
66MHz Capable
RO
Reset to 1
This bit applies to reverse bridge only.
1: 66MHz capable
22
23
Reserved
Fast Back-to-Back Capable
RO
RO
Reset to 0 when forward bridge or 1 when reverse bridge.
Reset to 0
This bit applies to reverse bridge only.
1: Enable fast back-to-back transactions
Reset to 0 when forward bridge or 1 when reverse bridge with primary bus in
PCI mode
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
24
FUNCTION
Master Data Parity Error
Detected
TYPE
RWC
DESCRIPTION
Bit set if its Parity Error Enable bit is set and either of the conditions occurs
on the primary:
FORWARD BRIDGE –
•
Receives a completion marked poisoned
•
Poisons a write request
REVERSE BRIDGE –
•
Detected parity error when receiving data or Split Response for read
•
Observes P_PERR_L asserted when sending data or receiving Split
Response for write
•
Receives a Split Completion Message indicating data parity error
occurred for non-posted write
26:25
DEVSEL_L Timing
(medium decode)
Reset to 0
These bits apply to reverse bridge only.
RO
00:
01:
10:
11:
27
Signaled Target Abort
RWC
28
Received Target Abort
RWC
29
Received Master Abort
RWC
30
Signaled System Error
RWC
31
Detected Parity Error
RWC
fast DEVSEL_L decoding
medium DEVSEL_L decoding
slow DEVSEL_L decoding
reserved
Reset to 00 when forward bridge or 01 when reverse bridge.
FORWARD BRIDGE –
This bit is set when PI7C9X110 completes a request using completer abort
status on the primary
REVERSE BRIDGE –
This bit is set to indicate a target abort on the primary
Reset to 0
FORWARD BRIDGE –
This bit is set when bridge receives a completion with completer abort
completion status on the primary
REVERSE BRIDGE –
This bit is set when PI7C9X110 detects a target abort on the primary
Reset to 0
FORWARD BRIDGE –
This bit is set when PI7C9X110 receives a completion with unsupported
request completion status on the primary
REVERSE BRIDGE –
This bit is set when PI7C9X110 detects a master abort on the primary
FORWARD BRIDGE –
This bit is set when PI7C9X110 sends an ERR_FATAL or
ERR_NON_FATAL message on the primary
REVERSE BRIDGE –
This bit is set when PI7C9X110 asserts SERR_L on the primary
Reset to 0
FORWARD BRIDGE –
This bit is set when poisoned TLP is detected on the primary
REVERSE BRIDGE –
This bit is set when address or data parity error is detected on the primary
Reset to 0
7.5.5
REVISION ID REGISTER – OFFSET 08h
BIT
7:0
7.5.6
FUNCTION
Revision
TYPE
RO
DESCRIPTION
Reset to 00000002h
CLASS CODE REGISTER – OFFSET 08h
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
15:8
FUNCTION
Programming Interface
23:16
Sub-Class Code
TYPE
RO
DESCRIPTION
Subtractive decoding of PCI-PCI bridge not supported
Reset to 00000000
Sub-Class Code
RO
10000000: Other bridge
31:24
Base Class Code
Reset to 10000000
Base class code
RO
00000110: Bridge Device (transparent mode)
Reset to 00000110 (transparent mode)
7.5.7
CACHE LINE SIZE REGISTER – OFFSET 0Ch
BIT
1:0
FUNCTION
Reserved
TYPE
RO
DESCRIPTION
Bit [1:0] not supported
2
Cache Line Size
RW
Reset to 00
1: Cache line size = 4 double words
3
Cache Line Size
RW
Reset to 0
1: Cache line size = 8 double words
4
Cache Line Size
RW
Reset to 0
1: Cache line size = 16 double words
5
Cache Line Size
RW
Reset to 0
1: Cache line size = 32 double words
7:6
Reserved
RO
Reset to 0
Bit [7:6] not supported
Reset to 00
7.5.8
PRIMARY LATENCY TIMER REGISTER – OFFSET 0Ch
BIT
15:8
FUNCTION
Primary Latency Timer
TYPE
RO /
RW
DESCRIPTION
8 bits of primary latency timer in PCI
FORWARD BRIDGE – RO with reset to 00h
REVERSE BRIDGE – RW with reset to 00h in PCI mode
7.5.9
PRIMARY HEADER TYPE REGISTER – OFFSET 0Ch
BIT
22:16
23
FUNCTION
Other bridge configuration
(non-transparent mode)
Single Function Device
31:24
Reserved
TYPE
RO
RO
DESCRIPTION
Type-0 header format configuration (10-3Fh)
Reset to 0000000 (non-transparent mode)
0: Indicates single function device
RO
Reset to 0
Reset to 00h
7.5.10 PRIMARY CSR AND MEMORY 0 BASE ADDRESS REGISTER – OFFSET 10h
BIT
0
FUNCTION
Space Indicator
TYPE
RO
DESCRIPTION
0: Memory space
1: IO space
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
FUNCTION
TYPE
2:1
Address Type
RO
DESCRIPTION
Reset to 0
00: 32-bit address decode range
01: 64-bit address decode range
10 and 11: reserved
3
Prefetchable control
RO
Reset to 00
0: Memory space is non-prefetchable
1: Memory space is prefetchable
11:4
31:12
Reserved
Base Address
RO
RW/RO
Reset to 0
Reset to 0
The size and type of this Base Address Register are defined from
Downstream Memory 0 Setup Register (Offset 9Ch), which can be initialized
by EEPROM (I2C) or SM Bus or Local Processor. The range of this register
is from 4KB to 2GB. The lower 4KB if this address reange map to the
PI7C9X110 CSRs into memory space. The remaining space is this range
above 4KB, if any, specifies a range for forwarding downstream memory
transactions. PI7X9X110 uses downstream Memory 0 Translated Base
Register (Offset 98h) to formulate direct address translation. If a bit in the
setup register is set to one, then the correspondent bit of this register will be
changed to RW.
Reset to 00000h
7.5.11 PRIMARY CSR I/O BASE ADDRESS REGISTER – OFFSET 14h
BIT
0
FUNCTION
Space Indicator
7:1
31:8
Reserved
Base Address
TYPE
RO
RO
RO/RW
DESCRIPTION
0: Memory space
1: IO space
Reset to 1
Reset to 0
This Base Address Register maps to PI7C9X110 primary IO space. The
maximum size is 256 bytes.
Reset to 00000000h
7.5.12 DOWNSTREAM I/O OR MEMORY 1 BASE ADDRESS REGISTER – OFFSET 18h
BIT
0
FUNCTION
Space Indicator
TYPE
RO
2:1
Address Type
RO
3
Prefetchable control
RO
11:4
31:12
Reserved
Base Address
DESCRIPTION
0: Memory space
1: IO space
Reset to 0
00: 32-bit address decode range
01: 64-bit address decode range
10 and 11: reserved
Reset to 00
0: Memory space is non-prefetchable
1: Memory space is prefetchable
RO
RW/RO
Reset to 0
Reset to 0
The size and type of this Base Address Register are defined from
Downstream IO or Memory 1 Setup Register (Offset ACh), which can be
initialized by EEPROM (I2C) or SM Bus or Local Processor. Writing a zero
to bit [31] of the setup register to disable this register. The range of this
register is from 4KB to 2GB for memory space or from 64B to 256B for IO
space. PI7X9X110 uses downstream IO or Memory 1 Translated Base
Register (Offset A8h) to formulate direct address translation. If a bit in the
setup register is set to one, then the correspondent bit of this register will be
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
FUNCTION
TYPE
DESCRIPTION
changed to RW.
Reset to 00000h
7.5.13 DONWSTREAM MEMORY 2 BASE ADDRESS REGISTER – OFFSET 1Ch
BIT
0
FUNCTION
Space Indicator
TYPE
RO
2:1
Address Type
RO
Reset to 0
00: 32-bit address decode range
01, 10 and 11: reserved
3
Prefetchable control
RO
Reset to 00
0: Memory space is non-prefetchable
1: Memory space is prefetchable
11:4
31:12
Reserved
Base Address
RO
RW/RO
DESCRIPTION
0: Memory space
1: IO space
Reset to 0
Reset to 0
The size and type of this Base Address Register are defined from
Downstream Memory 2 Setup Register (CSR Offset 00Ch), which can be
initialized by EEPROM (I2C) or SM Bus or Local Processor. Writing a zero
to bit [31] of the setup register to disable this register. The range of this
register is from 4KB to 2GB for memory space. PI7X9X110 uses
downstream Memory 2 Translated Base Register (CSR Offset 008h) to
formulate direct address translation. If a bit in the setup register is set to one,
then the correspondent bit of this register will be changed to RW.
Reset to 00000h
7.5.14 DOWNSTREAM MEMORY 3 BASE ADDRESS REGISTER – OFFSET 20h
BIT
0
FUNCTION
Space Indicator
TYPE
RO
2:1
Address Type
RO
3
Prefetchable control
RO
11:4
31:12
Reserved
Base Address
DESCRIPTION
0: Memory space
1: IO space
Reset to 0
00: 32-bit address decode range
01: 64-bit address decode range
10 and 11: reserved
Reset to 00
0: Memory space is non-prefetchable
1: Memory space is prefetchable
RO
RW/RO
Reset to 0
Reset to 0
The size and type of this Base Address Register are defined from
Downstream Memory 3 Setup Register (CSR Offset 014h), which can be
initialized by EEPROM (I2C) or SM Bus or Local Processor. Writing a zero
to bit [31] of the setup registers (CSR Offset 014h and 018h) to disable this
register. The range of this register is from 4KB to 9EB for memory space.
PI7C9X110 uses Memory 3 Translated Base Register (CSR Offset 010h) to
formulate direct address translation when 32-bit addressing programmed.
When 64-bit addressing programmed, no address translation is performed. If
a bit in the setup register is set to one, then the correspondent bit of this
register will be changed to RW.
Reset to 00000h
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PI7C9X110
PCIe-to-PCI Reversible Bridge
7.5.15 DOWNSTREAM MEMORY 3 UPPER BASE ADDRESS REGISTER – OFFSET 24h
BIT
31:0
FUNCTION
Base address
TYPE
RO/RW
DESCRIPTION
The size of this Base Address Register is defined from Downstream Memory
3 Upper 32-bit Setup Register (CSR Offset 018h), which can be initialized by
EEPROM (I2C) or SM Bus or Local Processor. Writing a zero to bit [31] of
the setup registers (CSR Offset 018h) to disable this register. This register
defines the upper 32 bits of a memory range for downstream forwarding
memory. If a bit in the setup register is set to one, then the correspondent bit
of this register will be changed to RW.
Reset to 00000000h
7.5.16 RESERVED REGISTER – OFFSET 28h
7.5.17 SUBSYTEM ID AND SUBSYSTEM VENDOR ID REGISTER – OFFSET 2Ch
BIT
15:0
FUNCTION
Subsystem Vendor ID
31:16
Subsystem ID
TYPE
RO
DESCRIPTION
Identify the vendor ID for add-in card or subsystem
Reset to 0000h
Identify the vendor specific device ID for add-in card or subsystem
RO
Reset to 0000h
7.5.18 RESERVED REGISTER – OFFSET 30h
7.5.19 CAPABILITY POINTER – OFFSET 34h
BIT
31:8
7:0
FUNCTION
Reserved
Capability Pointer
TYPE
RO
RO
DESCRIPTION
Reset to 0
Capability pointer to 80h
Reset to 80h
7.5.20 EXPANSION ROM BASE ADDRESS REGISTER – OFFSET 38h
BIT
31:0
FUNCTION
Expansion ROM Base
Address
TYPE
RO
DESCRIPTION
Expansion ROM not supported.
Reset to 00000000h
7.5.21 PRIMARY INTERRUPT LINE REGISTER – OFFSET 3Ch
BIT
7:0
FUNCTION
Primary Interrupt Line
TYPE
RW
DESCRIPTION
These bits apply to reverse bridge only.
For initialization code to program to tell which input of the interrupt
controller the PI7C9X110’s INTA_L in connected to.
Reset to 00000000
7.5.22 PRIMARY INTERRUPT PIN REGISTER – OFFSET 3Ch
BIT
FUNCTION
TYPE
DESCRIPTION
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
15:8
FUNCTION
Primary Interrupt Pin
TYPE
RO
DESCRIPTION
These bits apply to reverse bridge only.
Designates interrupt pin INTA_L, is used
Reset to 00h when forward mode or 01h when reverse mode.
7.5.23 PRIMARY MINIMUM GRANT REGISTER – OFFSET 3Ch
BIT
23:16
FUNCTION
Primary Minimum Grant
TYPE
RO
DESCRIPTION
This register is valid only in reverse bridge mode. It specifies how long of a
burst period that PI7C9X110 needs on the primary bus in the units of ¼
microseconds.
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
7.5.24 PRIMARY MAXIMUM LATENCY TIME REGISTER – OFFSET 3Ch
BIT
31:24
FUNCTION
Primary Maximum Latency
Timer
TYPE
RO
DESCRIPTION
This register is valid only in reverse bridge mode. It specifies how often that
PI7C9X110 needs to gain access to the primary bus in units of ¼
microseconds.
Reset to 0
7.5.25 PCI DATA BUFFERING CONTROL REGISTER – OFFSET 40h
BIT
0
FUNCTION
Secondary Internal Arbiter’s
PARK Function
TYPE
RW
DESCRIPTION
0: Park to the last master
1: Park to PI7C9X110 secondary port
1
Memory Read Prefetching
Dynamic Control Disable
RW
Reset to 0
0: Enable memory read prefetching dynamic control for PCI to PCIe read
1: Disable memory read prefetching dynamic control for PCI to PCIe read
2
Completion Data Prediction
Control
RW
Reset to 0
0: Enable completion data prediction for PCI to PCIe read.
1: Disable completion data prediction
3
5:4
Reserved
PCI Read Multiple Prefetch
Mode
RO
RW
Reset to 0
Reset to 0
00: One cache line prefetch if memory read multiple address is in
prefetchable range at the PCI interface
01: Full prefetch if address is in prefetchable range at PCI interface, and the
PI7C9X110 will keep remaining data after it disconnects the external master
during burst read with read multiple command until the discard timer expires
10: Full prefetch if address is in prefetchable range at PCI interface
11: Full prefetch if address is in prefetchable range at PCI interface and the
PI7C9X110 will keep remaining data after the read multiple is terminated
either by an external master or by the PI7C9X110, until the discard time
expires
7:6
PCI Read Line Prefetch
Mode
RW
Reset to 10
00: Once cache line prefetch if memory read address is in prefetchable range
at PCI interface
01: Full prefetch if address is in prefetchable range at PCI interface and the
PI7C9X110 will keep remaining data after it is disconnected by an external
master during burst read with read line command, until discard timer expires
10: Full prefetch if memory read line address is in prefetchable range at PCI
interface
11: Full prefetch if address is in prefetchable range at PCI interface and the
PI7C9X110 will keep remaining data after the read line is terminated either
by an external master or by the PI7C9X110, until the discard timer expires
Reset to 00
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
9:8
FUNCTION
PCI Read Prefetch Mode
TYPE
RW
DESCRIPTION
00: One cache line prefetch if memory read address is in prefetchable range
at PCI interface
01: Reserved
10: Full prefetch if memory read address is in prefetchable range at PCI
interface
11: Disconnect on the first DWORD
10
PCI Special Delayed Read
Mode Enable
Reset to 00
0: Retry any master at PCI bus that repeats its transaction with command
code changes.
RW
1: Allows any master at PCI bus to change memory command code (MR,
MRL, MRM) after it has received a retry. The PI7C9X110 will complete the
memory read transaction and return data back to the master if the address and
byte enables are the same.
11
14:12
Reserved
Maximum Memory Read
Byte Count
Reset to 0
Reset to 0
Maximum byte count is used by the PI7C9X110 when generating memory
read requests on the PCIe link in response to a memory read initiated on the
PCI bus and bit [9:8], bit [7:6], and bit [5:4] are set to “full prefetch”.
RO
RW
000:
001:
010:
011:
100:
101:
110:
111:
512 bytes (default)
128 bytes
256 bytes
512 bytes
1024 bytes
2048 bytes
4096 bytes
512 bytes
Reset to 000
7.5.26 CHIP CONTROL 0 REGISTER – OFFSET 40h
BIT
15
FUNCTION
Flow Control Update
Control
TYPE
RW
16
PCI Retry Counter Status
RWC
18:17
PCI Retry Counter Control
RW
19
PCI Discard Timer Disable
RW
DESCRIPTION
0: Flow control is updated for every two credits available
1: Flow control is updated for every on credit available
Reset to 0
0: The PCI retry counter has not expired since the last reset
1: The PCI retry counter has expired since the last reset
Reset to 0
00: No expiration limit
01: Allow 256 retries before expiration
10: Allow 64K retries before expiration
11: Allow 2G retries before expiration
Reset to 00
0: Enable the PCI discard timer in conjunction with bit [27] offset 3Ch
(bridge control register)
1: Disable the PCI discard timer in conjunction with bit [27] offset 3Ch
(bridge control register)
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
20
FUNCTION
PCI Discard Timer Short
Duration
TYPE
RW
DESCRIPTION
0: Use bit [24] offset 3Ch for forward bridge or bit [25] offset 3Ch for
reverse bridge to indicate how many PCI clocks should be allowed before the
PCI discard timer expires
1: 64 PCI clocks allowed before the PCI discard timer expires
22:21
Configuration Request Retry
Timer Counter Value
Control
RW
23
Delayed Transaction Order
Control
RW
25:24
Completion Timer Counter
Value Control
RW
26
Isochronous Traffic Support
Enable
RW
Reset to 0
00: Timer expires at 25us
01: Timer expires at 0.5ms
10: Timer expires at 5ms
11: Timer expires at 25ms
Reset to 01
0: Enable out-of-order capability between delayed transactions
1: Disable out-of-order capability between delayed transactions
Reset to 0
00: Timer expires at 50us
01: Timer expires at 10ms
10: Timer expires at 50ms
11: Timer disabled
Reset to 01
0: All memory transactions from PCI to PCIe will be mapped to TC0
1: All memory transactions from PCI to PCIe will be mapped to Traffic Class
defined in bit [29:27] of offset 40h.
29:27
30
Traffic Class Used For
Isochronous Traffic
Serial Link Interface
Loopback Enable
Reset to 0
Reset to 001
RW
RW /
RO
0: Normal mode
1: Enable serial link interface loopback mode (TX to RX) if TM0=LOW,
TM1=HIGH, TM2=HIGH, MSK_IN=HIGH, REVRSB=HIGH. PCI
transaction from PCI bus will loop back to PCI bus
RO for forward bridge
31
Primary Configuration
Access Lockout
Reset to 0
0: PI7C9X110 configuration space can be accessed from both interfaces
RO /
RW
1: PI7C9X110 configuration space can only be accessed from the secondary
interface. Primary bus accessed receives completion with CRS status for
forward bridge, or target retry for reverse bridge
Reset to 0 if TM0 is LOW
7.5.27 SECONDARY COMMAND REGISTER – OFFSET 44h
BIT
0
FUNCTION
I/O Space Enable
1
Memory Space Enable
TYPE
RW
RW
DESCRIPTION
0: Ignore I/O transactions on the secondary interface
1: Enable response to memory transactions on the secondary interface
Reset to 0
0: Ignore memory read transactions on the secondary interface
1: Enable memory read transactions on the secondary interface
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
2
FUNCTION
Bus Master Enable
TYPE
RW
DESCRIPTION
0: Do not initiate memory or I/O transactions on the secondary interface and
disable response to memory and I/O transactions on the secondary interface
1: Enable the PI7C9X110 to operate as a master on the secondary interfaces
for memory and I/O transactions forwarded from the secondary interface.
Reset to 0
0: Bridge does not respond as a target to Special Cycle transactions, so this
bit is defined as Read-Only and must return 0 when read
3
Special Cycle Enable
RO
4
Memory Write and
Invalidate Enable
RO
5
VGA Palette Snoop Enable
RO
Reset to 0
0: PI7C9X110 does not originate a Memory Write and Invalidate
transaction. Implements this bit as Read-Only and returns 0 when read
(unless forwarding a transaction for another master).
Reset to 0
0: Ignore VGA palette snoop access on the secondary
6
Parity Error Response
Enable
RW
Reset to 0
0: May ignore any parity error that is detected and take its normal action
1: This bit if set, enables the setting of Master Data Parity Error bit in the
Status Register when poisoned TLP received or parity error is detected and
takes its normal action
7
Wait Cycle Control
RO
8
Secondary SERR_L Enable
Bit
RW
9
Fast Back-to-Back Enable
RO
10
Secondary Interrupt Disable
RO /
RW
15:11
Reserved
RO
Reset to 0
Wait cycle control not supported
Reset to 0
0: Disable
1: Enable PI7C9X110 in forward bridge mode to report non-fatal or fatal
error message to the Root Complex. Also, in reverse bridge mode to assert
SERR_L on the secondary interface
Reset to 0
Fast back-to-back enable not supported
Reset to 0
0: INTx interrupt messages can be generated
1: Prevent INTx messages to be generated and any asserted INTx interrupts
will be released.
Reset to 0
Reset to 00000
7.5.28 SECONDARY STATUS REGISTER – OFFSET 44h
BIT
18:16
19
FUNCTION
Reserved
Secondary Interrupt Status
TYPE
RO
RO
20
Capability List Capable
RO
21
66MHz Capable
RO
DESCRIPTION
Reset to 000
0: No INTx interrupt message request pending in PI7C9X110 secondary
1: INTx interrupt message request pending in PI7C9X110 secondary
Reset to 0
1: PI7C9X110 supports the capability list (offset 34h in the pointer to the
data structure)
Reset to 1
This bit applies to forward bridge only.
1: 66MHz capable
22
Reserved
RO
Reset to 0 when reverse bridge or 1 when forward bridge.
Reset to 0
Page 84 of 144
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
23
FUNCTION
Fast Back-to-Back Capable
TYPE
RO
DESCRIPTION
This bit applies to forward bridge only.
1: Enable fast back-to-back transactions
24
Master Data Parity Error
Detected
RWC
Reset to 0 when reverse bridge or 1 when forward bridge with secondary bus
in PCI mode
Bit set if its Parity Error Enable bit is set and either of the conditions occurs
on the secondary:
REVERSE BRIDGE –
•
Receives a completion marked poisoned
•
Poisons a write request
FORWARD BRIDGE –
•
Detected parity error when receiving data or Split Response for read
•
Observes P_PERR_L asserted when sending data or receiving Split
Response for write
•
Receives a Split Completion Message indicating data parity error
occurred for non-posted write
26:25
DEVSEL_L Timing
(medium decode)
RO
Reset to 0
These bits apply to forward bridge only.
00:
01:
10:
11:
27
Signaled Target Abort
RWC
28
Received Target Abort
RWC
29
Received Master Abort
RWC
30
Signaled System Error
RWC
31
Detected Parity Error
RWC
fast DEVSEL_L decoding
medium DEVSEL_L decoding
slow DEVSEL_L decoding
reserved
Reset to 00 when reverse bridge or 01 when forward bridge.
REVERSE BRIDGE –
This bit is set when PI7C9X110 completes a request using completer abort
status on the secondary
FORWARD BRIDGE –
This bit is set to indicate a target abort on the secondary
Reset to 0
REVERSE BRIDGE –
This bit is set when bridge receives a completion with completer abort
completion status on the secondary
FORWARD BRIDGE –
This bit is set when PI7C9X110 detects a target abort on the secondary
Reset to 0
REVERSE BRIDGE –
This bit is set when PI7C9X110 receives a completion with unsupported
request completion status on the secondary
FORWARD BRIDGE –
This bit is set when PI7C9X110 detects a master abort on the secondary
REVERSE BRIDGE –
This bit is set when PI7C9X110 sends an ERR_FATAL or
ERR_NON_FATAL message on the secondary
FORWARD BRIDGE –
This bit is set when PI7C9X110 asserts SERR_L on the secondary
Reset to 0
REVERSE BRIDGE –
This bit is set when poisoned TLP is detected on the secondary
FORWARD BRIDGE –
This bit is set when address or data parity error is detected on the secondary
Reset to 0
7.5.29 ARBITER ENABLE REGISTER – OFFSET 48h
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
0
FUNCTION
Enable Arbiter 0
TYPE
RW
DESCRIPTION
0: Disable arbitration for internal PI7C9X110request
1: Enable arbitration for internal PI7C9X110 request
1
Enable Arbiter 1
RW
Reset to 1
0: Disable arbitration for master 1
1: Enable arbitration for master 1
2
Enable Arbiter 2
RW
Reset to 1
0: Disable arbitration for master 2
1: Enable arbitration for master 2
3
Enable Arbiter 3
RW
Reset to 1
0: Disable arbitration for master 3
1: Enable arbitration for master 3
4
Enable Arbiter 4
RW
Reset to 1
0: Disable arbitration for master 4
1: Enable arbitration for master 4
5
Enable Arbiter 5
RW
Reset to 1
0: Disable arbitration for master 5
1: Enable arbitration for master 5
6
Enable Arbiter 6
RW
Reset to 1
0: Disable arbitration for master 6
1: Enable arbitration for master 6
7
Enable Arbiter 7
RW
Reset to 1
0: Disable arbitration for master 7
1: Enable arbitration for master 7
8
Enable Arbiter 8
RW
Reset to 1
0: Disable arbitration for master 8
1: Enable arbitration for master 8
Reset to 1
7.5.30 ARBITER MODE REGISTER – OFFSET 48h
BIT
9
FUNCTION
External Arbiter Bit
10
Broken Master Timeout
Enable
TYPE
RO
RW
DESCRIPTION
0: Enable internal arbiter (if CFN_L is tied LOW)
1: Use external arbiter (if CFN_L is tied HIGH)
Reset to 0/1 according to what CFN_L is tied to
0: Broken master timeout disable
1: This bit enables the internal arbiter to count 16 PCI bus cycles while
waiting for FRAME_L to become active when a device’s PCI bus GNT is
active and the PCI bus is idle. If the broken master timeout expires, the PCI
bus GNT for the device is de-asserted.
11
Broken Master Refresh
Enable
RW
Reset to 0
0: A broken master will be ignored forever after de-asserting its REQ_L for
at least 1 clock
1: Refresh broken master state after all the other masters have been served
once
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
19:12
FUNCTION
Arbiter Fairness Counter
TYPE
RW
20
GNT_L Output Toggling
Enable
RW
DESCRIPTION
08h: These bits are the initialization value of a counter used by the internal
arbiter. It controls the number of PCI bus cycles that the arbiter holds a
device’s PCI bus GNT active after detecting a PCI bus REQ_L from another
device. The counter is reloaded whenever a new PCI bus GNT is asserted.
For every new PCI bus GNT, the counter is armed to decrement when it
detects the new fall of FRAME_L. If the arbiter fairness counter is set to 00h,
the arbiter will not remove a device’s PCI bus GNT until the device has deasserted its PCI bus REQ.
Reset to 08h
0: GNT_L not de-asserted after granted master assert FRAME_L
1: GNT_L de-asserts for 1 clock after 2 clocks of the granted master asserting
FRAME_L
21
Reserved
Reset to 0
Reset to 0
RO
7.5.31 ARBITER PRIORITY REGISTER – OFFSET 48h
BIT
22
FUNCTION
Arbiter Priority 0
TYPE
RW
DESCRIPTION
0: Low priority request to internal PI7C9X110
1: High priority request to internal PI7C9X110
23
Arbiter Priority 1
RW
Reset to 1
0: Low priority request to master 1
1: High priority request to master 1
24
Arbiter Priority 2
RW
Reset to 0
0: Low priority request to master 2
1: High priority request to master 2
25
Arbiter Priority 3
RW
Reset to 0
0: Low priority request to master 3
1: High priority request to master 3
26
Arbiter Priority 4
RW
Reset to 0
0: Low priority request to master 4
1: High priority request to master 4
27
Arbiter Priority 5
RW
Reset to 0
0: Low priority request to master 5
1: High priority request to master 5
28
Arbiter Priority 6
RW
Reset to 0
0: Low priority request to master 6
1: High priority request to master 6
29
Arbiter Priority 7
RW
Reset to 0
0: Low priority request to master 7
1: High priority request to master 7
30
Arbiter Priority 8
RW
Reset to 0
0: Low priority request to master 8
1: High priority request to master 8
31
Reserved
RO
Reset to 0
Reset to 0
7.5.32 SECONDARY CACHE LINE SIZE REGISTER – OFFSET 4Ch
BIT
FUNCTION
TYPE
DESCRIPTION
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
1:0
FUNCTION
Reserved
TYPE
RO
DESCRIPTION
00: Cache line size of 1 DW and 2 DW are not supported
2
Cache Line Size
RW
Reset to 00
1: Cache line size = 4 double words
3
Cache Line Size
RW
Reset to 0
1: Cache line size = 8 double words
4
Cache Line Size
RW
Reset to 0
1: Cache line size = 16 double words
5
Cache Line Size
RW
Reset to 0
1: Cache line size = 32 double words
7:6
Reserved
RO
Reset to 0
Bit [7:6] not supported
Reset to 00
7.5.33 SECONDARY LATENCY TIME REGISTER – OFFSET 4Ch
BIT
15:8
FUNCTION
Secondary Latency Timer
TYPE
RO /
RW
DESCRIPTION
8 bits of secondary latency timer in PCI
REVERSE BRIDGE –
RO with reset to 00h
FORWARD BRIDGE –
RW with reset to 00h in PCI mode
7.5.34 SECONDARY HEADER TYPE REGISTER – OFFSET 4Ch
BIT
22:16
FUNCTION
Other Bridge Configuration
TYPE
RO
DESCRIPTION
Type-0 header format configuration (10 – 3Fh)
23
Single Function Device
RO
Reset to 0000000
0: Indicates single function device
31:24
Reserved
RO
Reset to 0
Reset to 00h
7.5.35 SECONDARY CSR AND MEMORY 0 BASE ADDRESS REGISTER – OFFSET 50h
BIT
0
FUNCTION
Space Indicator
TYPE
RO
2:1
Address Type
RO
3
Prefetchable control
RO
11:4
Reserved
RO
DESCRIPTION
0: Memory space
1: IO space
Reset to 0
00: 32-bit address decode range
01: 64-bit address decode range
10 and 11: reserved
Reset to 00
0: Memory space is non-prefetchable
1: Memory space is prefetchable
Reset to 0
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
31:12
FUNCTION
Base Address
TYPE
RW/RO
DESCRIPTION
The size and type of this Base Address Register are defined from Upstream
Memory 0 Setup Register (Offset E4h), which can be initialized by
EEPROM (I2C) or SM Bus or Local Processor. The range of this register is
from 4KB to 2GB. The lower 4KB if this address reange map to the
PI7C9X110 CSRs into memory space. The remaining space is this range
above 4KB, if any, specifies a range for forwarding upstream memory
transactions. PI7X9X110 uses upstream Memory 0 Translated Base Register
(Offset E0h) to formulate direct address translation. If a bit in the setup
register is set to one, then the correspondent bit of this register will be
changed to RW.
Reset to 00000h
7.5.36 SECONDARY CSR I/O BASE ADDRESS REGISTER – OFFSET 54h
BIT
0
FUNCTION
Space Indicator
7:1
31:8
Reserved
Base Address
TYPE
RO
RO
RO/RW
DESCRIPTION
0: Memory space
1: IO space
Reset to 1
Reset to 0
This Base Address Register maps to PI7C9X110 secondary IO space. The
maximum size is 256 bytes.
Reset to 00000000h
7.5.37 UPSTREAM I/O OR MEMORY 1 BASE ADDRESS REGISTER – OFFSET 58h
BIT
0
FUNCTION
Space Indicator
TYPE
RO
2:1
Address Type
RO
3
Prefetchable control
RO
5:4
31:6
Reserved
Base Address
DESCRIPTION
0: Memory space
1: IO space
Reset to 0
00: 32-bit address decode range
01: 64-bit address decode range
10 and 11: reserved
Reset to 00
0: Memory space is non-prefetchable
1: Memory space is prefetchable
RO
RW/RO
Reset to 0
Reset to 0
The size and type of this Base Address Register are defined from Upstream
IO or Memory 1 Setup Register (Offset ECh), which can be initialized by
EEPROM (I2C) or SM Bus or Local Processor. Writing a zero to bit [31] of
the setup register to disable this register. The range of this register is from
4KB to 2GB for memory space or from 64B to 256B for IO space.
PI7X9X110 uses upstream IO or Memory 1 Translated Base Register (Offset
E8h) to formulate direct address translation. If a bit in the setup register is
set to one, then the correspondent bit of this register will be changed to RW.
Reset to 00000h
7.5.38 UPSTREAM MEMORY 2 BASE ADDRESS REGISTER – OFFSET 5Ch
BIT
0
FUNCTION
Space Indicator
TYPE
RO
DESCRIPTION
0: Memory space
1: IO space
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
2:1
FUNCTION
Address Type
3
Prefetchable control
13:4
31:14
Reserved
Base Address
TYPE
RO
DESCRIPTION
00: 32-bit address decode range
01, 10 and 11: reserved
Reset to 00
0: Memory space is non-prefetchable
1: Memory space is prefetchable
RO
RO
RW/RO
Reset to 0
Reset to 0
This Base Address register defines the address range for upstream memory
transactions. PI7C9X110 uses a lookup table to do the address translation.
The address range of this register is from 16KB to 2GB in memory space.
The address range is divided into 64 pages. The size of each page is defined
by Memory Address Forwarding Control register (Offset 6Ah), which is
initialized by EEPROM (I2C) or SM Bus or local processor. Writing a zero
to the bit [0] of the look up table entry can disable the corresponding page of
this register (CSR Offset 1FFh: 100h).
The number of writeable bit may change depending on the page size setup.
Reset to 00000h
7.5.39 UPSTREAM MEMORY 3 BASE ADDRESS REGISTER – OFFSET 60h
BIT
0
FUNCTION
Space Indicator
TYPE
RO
2:1
Address Type
RO
3
Prefetchable control
RO
11:4
31:12
Reserved
Base Address
DESCRIPTION
0: Memory space
1: IO space
Reset to 0
00: 32-bit address decode range
01: 64-bit address decode range
10 and 11: reserved
Reset to 00
0: Memory space is non-prefetchable
1: Memory space is prefetchable
RO
RW/RO
Reset to 0
Reset to 0
The size and type of this Base Address Register are defined from Upstream
Memory 3 Setup Register (CSR Offset 034h), which can be initialized by
EEPROM (I2C) or SM Bus or Local Processor. Writing a zero to bit [31] of
the setup registers (CSR Offset 034h and 038h) to disable this register. The
range of this register is from 4KB to 9EB for memory space. PI7C9X110
uses this register and the Upstream Memory 3 Upper Base Address Register
when 64-bit addressing programmed (bit [21] of Offset 68h). When 64-bit
addressing is disabled, no address translation is performed. All 64-bit
address transactions on the secondary interface falling outside of the
Downstream Memory 3 address range are forwarded upstream.
Reset to 00000h
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PI7C9X110
PCIe-to-PCI Reversible Bridge
7.5.40 UPSTREAM MEMORY 3 UPPER BASE ADDRESS REGISTER – OFFSET 64h
BIT
31:0
FUNCTION
Base address
TYPE
RO/RW
DESCRIPTION
The size of this Base Address Register is defined from Upstream Memory 3
Upper 32-bit Setup Register (CSR Offset 038h), which can be initialized by
EEPROM (I2C) or SM Bus or Local Processor. Writing a zero to bit [31] of
the setup registers (CSR Offset 038h) to disable this register. This register
defines the upper 32 bits of a memory range for upstream forwarding
memory. PI7C9X110 uses this register and the Upstream Memory 3 Base
Address Register when 64-bit addressing programmed (bit [21] of Offset
68h). When 64-bit addressing is disabled, no address translation is
performed. All 64-bit address transactions on the secondary interface falling
outside of the Downstream Memory 3 address range are forwarded upstream.
Reset to 00000000h
7.5.41 EXPRESS TRANSMITTER/RECEIVER REGISTER – OFFSET 68h
BIT
1:0
FUNCTION
Nominal Driver Current
Control
TYPE
RW
5:2
Driver Current Scale
Multiple Control
RW
11:8
Driver De-emphasis Level
Control
RW
DESCRIPTION
00: 20mA
01: 10mA
10: 28mA
11: Reserved
Reset to 00
0000: 1.00 x nominal driver current
0001: 1.05 x nominal driver current
0010: 1.10 x nominal driver current
0011: 1.15 x nominal driver current
0100: 1.20 x nominal driver current
0101: 1.25 x nominal driver current
0110: 1.30 x nominal driver current
0111: 1.35 x nominal driver current
1000: 1.60 x nominal driver current
1001: 1.65 x nominal driver current
1010: 1.70 x nominal driver current
1011: 1.75 x nominal driver current
1100: 1.80 x nominal driver current
1101: 1.85 x nominal driver current
1110: 1.90 x nominal driver current
1111: 1.95 x nominal driver current
Reset to 0000
0000: 0.00 db
0001: -0.35 db
0010: -0.72 db
0011: -1.11 db
0100: -1.51 db
0101: -1.94 db
0110: -2.38 db
0111: -2.85 db
1000: -3.35 db
1001: -3.88 db
1010: -4.44 db
1011: -5.04 db
1100: -5.68 db
1101: -6.38 db
1110: -7.13 db
1111: -7.96 db
Reset to 1000
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
13:12
FUNCTION
Transmitter Termination
Control
15:14
Receiver Termination
Control
TYPE
RW
DESCRIPTION
00: 52 ohms
01: 57 ohms
10: 43 ohms
11: 46 ohms
Reset to 00
00: 52 ohms
01: 57 ohms
10: 43 ohms
11: 46 ohms
RW
Reset to 00
7.5.42 MEMORY ADDRESS FORWARDING CONTROL REGISTER – OFFSET 68h
BIT
19:16
FUNCTION
Lookup Table Page Size
TYPE
RW
DESCRIPTION
If bit [20] of Offset 68h is low, then
0000: Disable Upstream Memory 2 Base Address Register
0001: 256 bytes
0010: 512 bytes
0011: 1K bytes
0100: 2K bytes
0101: 4K bytes
0110: 8K bytes
0111: 16K bytes
1000: 32K bytes
1001: 64K bytes
1010: 128K bytes
1011: 256K bytes
1100: 512K bytes
1101: 1M bytes
1110: 2M bytes
1111: 4M bytes
If bit [20] of Offset 68h is high, then
0000: Disable Upstream Memory 2 Base Address Register
0001: 8M bytes
0010: 16M bytes
0011: 32M bytes
01XX: Disable Upstream Memory 2 Base Address Register
1XXX: Disable Upstream Memory 2 Base Address Register
20
Lookup Table Page Size
Extension
RW
21
Upstream 64-bit Address
Range Enable
RW
29:22
Reserved
RO
Reset to 0h
0: Normal Lookup Table Page Size
1: Coarse Lookup Table Page Size
Reset to 0
0: Any 64-bit address transactions on secondary interface falling outside of
Downstream Memory 3 address range are forwarded upstream
1: Enable 64-bit address transaction forwarding upstream based on Upstream
Memory 3 address range without address translation
Reset to 0
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
7.5.43 UPSTREAM MEMORY WRITE FRAGMENT CONTROL REGISTER – OFFSET 68h
BIT
31:30
FUNCTION
Memory Write Fragment
Control
TYPE
RW
DESCRIPTION
Upstream Memory Write Fragment Control
00: Fragment at 32-byte boundary
01: Fragment at 64-byte boundary
1x: Fragement at 128-byte boundary
Reset to 10h
7.5.44 SUBSYSTEM VENDOR ID REGISTER – OFFSET 6Ch
BIT
15:0
FUNCTION
Subsystem Vendor ID
TYPE
RO
DESCRIPTION
Subsystem vendor ID identifies the particular add-in card or subsystem.
Reset to 00h
7.5.45 SUBSYSTEM ID REGISTER – OFFSET 6Ch
BIT
31:16
FUNCTION
Subsystem ID
TYPE
RO
DESCRIPTION
Subsystem ID identifies the particular add-in card or subsystem.
Reset to 00h
7.5.46 EEPROM AUTOLOAD CONTROL/STATUS REGISTER – OFFSET 70h
BIT
0
FUNCTION
Initiate EEPROM Read or
Write Cycle
TYPE
RW
DESCRIPTION
This bit will be reset to 0 after the EEPROM operation is finished.
0: EEPROM AUTOLOAD disabled
0 -> 1: Starts the EEPROM Read or Write cycle
1
Control Command for
EEPROM
RW
Reset to 0
0: Read
1: Write
2
EEPROM Error
RO
Reset to 0
0: EEPROM acknowledge is always received during the EEPROM cycle
1: EEPROM acknowledge is not received during EEPROM cycle
3
EPROM Autoload Complete
Status
RO
Reset to 0
0: EEPROM autoload is not successfully completed
1: EEPROM autoload is successfully completed
5:4
EEPROM Clock Frequency
Control
RW
Reset to 0
Where PCLK is 125MHz
00: PCLK / 4096
01: PCLK / 2048
10: PCLK / 1024
11: PCLK / 128
6
EEPROM Autoload Control
RW
Reset to 00
0: Enable EEPROM autoload
1: Disable EEPROM autoload
Reset to 0
Page 93 of 144
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
7
FUNCTION
Fast EEPROM Autoload
Control
TYPE
RW
DESCRIPTION
0: Normal speed of EEPROM autoload
1: Increase EEPROM autoload by 32x
8
EEPROM Autoload Status
RO
15:9
EEPROM Word Address
RW
Reset to 0
EEPROM word address for EEPROM cycle
31:16
EEPROM Data
RW
Reset to 0000000
EEPROM data to be written into the EEPROM
Reset to 0
0: EEPROM autoload is not on going
1: EEPROM autoload is on going
Reset to 0000h
7.5.47 RESERVED REGISTER – OFFSET 74h
7.5.48 BRIDGE CONTROL AND STATUS REGISTER – OFFSET 78h
BIT
1:0
2
FUNCTION
Reserved
SERR_L Forward Enable
TYPE
RO
RW/RO
3
Secondary Interface Reset
RW
5:4
VGA Enable
RW
6
VGA 16-bit Decode
RW
7
Master Abort Mode
RW
8
Primary Master Timeout
RW
DESCRIPTION
Reset to 00
0: Disable the forwarding of SERR_L to ERR_FATAL and
ERR_NONFATAL
1: Enable the forwarding of SERR_L to ERR_FATAL and
ERR_NONFATAL
Reset to 0 (FORWARD BRIDGE)
RO bit for REVERSE BRIDGE
0: Do not force the assertion of RESET_L on secondary PCI bus in forward
bridge mode, or do not generate a hot reset on the PCI Express link in reverse
bridge mode
1: Force the assertion of RESET_L on secondary PCI bus in forward bridge
mode, or generate a hot reset on the PCI Express link in reverse bridge mode
Reset to 0
00: VGA memory and I/O transactions on the primary and secondary
interfaces are ignored, unless decoded by other mechanism
01: VGA memory and I/O transactions on the primary interface are
forwarded to secondary interface without address translation, but VGA
transactions on secondary interface are ignored
10: VGA memory and I/O transactions on the secondary interface are
forwarded to primary interface without address translation, but VGA
transactions on primary interface are ignored
Reset to 00
0: Execute 10-bit address decodes on VGA I/O accesses
1: Execute 16-bit address decode on VGA I/O accesses
Reset to 0
0: Do not report master aborts (return FFFFFFFFh on reads and discards
data on write)
1: Report master abort by signaling target abort if possible or by the
assertion of SERR_L (if enabled).
Reset to 0
0: Primary discard timer counts 215 PCI clock cycles
1: Primary discard timer counts 210 PCI clock cycles
FORWARD BRIDGE – Bit is RO and ignored by PI7C9X110
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
9
FUNCTION
Secondary Master Timeout
TYPE
RW
10
Master Timeout Status
RWC
11
Discard Timer SERR_L
Enable
RW
DESCRIPTION
0: Secondary discard timer counts 215 PCI clock cycles
1: Secondary discard timer counts 210 PCI clock cycles
REVERSE BRIDGE – Bit is RO and ignored by PI7C9X110
Reset to 0
Bit is set when the discard timer expires and a delayed completion is
discarded at the PCI interface for the forward or reverse bridge
Reset to 0
Bit is set to enable to generate ERR_NONFATAL or ERR_FATAL for
forward bridge, or assert SERR_L for reverse bridge as a result of the
expiration of the discard timer.
Reset to 0
7.5.49 GPIO DATA AND CONTROL REGISTER – OFFSET 78h
BIT
15:12
19:16
23:20
27:24
31:28
FUNCTION
GPIO Output Write-1-toClear
GPIO Output Write-1-to-Set
GPIO Output Enable Write1-to-Clear
GPIO Output Enable Write1-to-Set
GPIO Input Data Register
TYPE
RW
DESCRIPTION
Reset to 0h
RW
RW
Reset to 0h
Reset to 0h
RW
Reset to 0h
RO
Reset to 0h
7.5.50 SECONDARY INTERRUPT LINE REGISTER – OFFSET 7Ch
BIT
7:0
FUNCTION
Secondary Interrupt Line
TYPE
RW
DESCRIPTION
These bits apply to forward bridge only.
For initialization code to program to tell which input of the interrupt
controller the bridge’s INTA_L in connected to.
Reset to 00000000
7.5.51 SECONDARY INTERRUPT PIN REGISTER – OFFSET 7Ch
BIT
15:8
FUNCTION
Secondary Interrupt Pin
TYPE
RO
DESCRIPTION
These bits apply to forward bridge only.
00000001: Designates interrupt pin INTA_L is used
Reset to 00h when reverse mode or 01h when forward mode.
7.5.52 SECONDARY MINIMUM GRANT REGISTER – OFFSET 7Ch
BIT
23:16
FUNCTION
Secondary Minimum Grant
TYPE
RO
DESCRIPTION
This register is valid only in forward bridge mode. It specifies how long of a
burst period that PI7C9X110 needs on the secondary bus in the units of ¼
microseconds.
Reset to 0
7.5.53 SECONDARY MAXIMUM LATENCY TIMER REGISTER – OFFSET 7Ch
BIT
FUNCTION
TYPE
DESCRIPTION
Page 95 of 144
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
31:24
FUNCTION
Secondary Maximum
Latency Timer
TYPE
RO
DESCRIPTION
This register is valid only in forward bridge mode. It specifies how often that
PI7C9X110 needs to gain access to the primary bus in units of ¼
microseconds.
Reset to 0
7.5.54 CAPABILITY ID REGISTER – OFFSET 80h
BIT
7:0
FUNCTION
Capability ID
TYPE
RO
DESCRIPTION
Capability ID
Reset to 07h
7.5.55 NEXT CAPABILITY POINTER REGISTER – OFFSET 80h
BIT
15:8
FUNCTION
Next Capability Pointer
TYPE
RO
DESCRIPTION
Point to power management
Reset to 90h
7.5.56 SECONDARY STATUS REGISTER – OFFSET 80h
BIT
16
FUNCTION
64-bit Device on Secondary
Bus Interface
17
133MHz Capable
18
Split Completion Discarded
TYPE
RO
RO
RO /
RWC
DESCRIPTION
64-bit not supported
Reset to 0
When this bit is 1, PI7C9X110 is 133MHz capable on its secondary bus
interface
Reset to 1 in forward bridge mode or 0 in reverse bridge mode
This bit is a read-only and set to 0 in reverse bridge mode or is read-write in
forward bridge mode
When this is set to 1, a split completion has been discarded by PI7C9X110 at
secondary bus because the requester did not accept the split completion
transaction
19
Unexpected Split
Completion
RWC
Reset to 0
This bit is set to 0 in forward bridge mode or is read-write in reverse bridge
mode
When this is set to 1, an unexpected split completion has been received with
the requester ID equaled to the secondary bus number, device number, and
function number at the PI7X9X110 secondary bus interface
20
Split Completion Overrun
RWC
21
Split Request Delayed
RWC
Reset to 0
When this bit is set to 1, a split completion has been terminated by
PI7C9X110 with either a retry or disconnect at the next ADB due to the
buffer full condition
Reset to 0
When this bit is set to 1, a split request is delayed because PI7C9X110 is not
able to forward the split request transaction to its secondary bus due to
insufficient room within the limit specified in the split transaction
commitment limit field of the downstream split transaction control register
Reset to 0
Page 96 of 144
Pericom Semiconductor – Confidential
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
24:22
FUNCTION
Secondary Clock Frequency
TYPE
RO
DESCRIPTION
These bits are only meaningful in forward bridge mode. In reverse bridge
mode, all three bits are set to zero.
000: Conventional PCI mode (minimum clock period not applicable)
001: 66MHz (minimum clock period is 15ns)
010: 100 to 133MHz (minimum clock period is 7.5ns)
011: Reserved
1xx: Reserved
31:25
Reserved
Reset to 000
0000000
RO
7.5.57 BRIDGE STATUS REGISTER – OFFSET 84h
BIT
2:0
FUNCTION
Function Number
TYPE
RO
7:3
Device Number
RO
15:8
Bus Number
RO
16
64-bit Device on Primary
Bus Interface
RO
17
133MHz Capable
RO
18
Split Completion Discarded
RO /
RWC
DESCRIPTION
Function number (AD [10:8] of a type 0 configuration transaction)
Reset to 000
Device number (AD [15:11] of a type 0 configuration transaction) is assigned
to the PI7C9X110 by the connection of system hardware. Each time the
PI7C9X110 is addressed by a configuration write transaction, the bridge
updates this register with the contents of AD [15:11] of the address phase of
the configuration transaction, regardless of which register in the PI7C9X110
is addressed by the transaction. The PI7C9X110 is addressed by a
configuration write transaction if all of the following are true:
•
The transaction uses a configuration write command
•
IDSEL is asserted during the address phase
•
AD [1:0] are 00 (type o configuration transaction)
•
AD [10:8] of the configuration address contain the appropriate function
number
Reset to 11111
Additional address from which the contents of the primary bus number
register on type 1 configuration space header is read. The PI7C9X110 uses
the bus number, device number, and function number fields to create a
completer ID when responding with a split completion to a read of an internal
PI7C9X110 register. These fields are also used for cases when one interface
is in conventional PCI mode.
Reset to 11111111
64-bit not supported
Reset to 0
When this bit is 1, PI7C9X110 is 133MHz capable on its primary bus
interface
Reset to 0 in forward bridge mode or 1 in reverse bridge mode
This bit is a read-only and set to 0 in reverse bridge mode or is read-write in
forward bridge mode
When this is set to 1, a split completion has been discarded by PI7C9X110 at
primary bus because the requester did not accept the split completion
transaction
19
Unexpected Split
Completion
RWC
Reset to 0
This bit is set to 0 in forward bridge mode or is read-write in reverse bridge
mode
When this is set to 1, an unexpected split completion has been received with
the requester ID equaled to the primary bus number, device number, and
function number at the PI7X9X110 primary bus interface
Reset to 0
Page 97 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
20
FUNCTION
Split Completion Overrun
TYPE
RWC
21
Split Request Delayed
RWC
31:22
Reserved
DESCRIPTION
When this bit is set to 1, a split completion has been terminated by
PI7C9X110 with either a retry or disconnect at the next ADB due to the
buffer full condition
Reset to 0
When this bit is set to 1, a split request is delayed because PI7C9X110 is not
able to forward the split request transaction to its primary bus due to
insufficient room within the limit specified in the split transaction
commitment limit field of the downstream split transaction control register
Reset to 0
0000000000
RO
7.5.58 UPSTREAM SPLIT TRANSACTION REGISTER – OFFSET 88h
BIT
15:0
FUNCTION
Upstream Split Transaction
Capability
TYPE
RO
31:16
Upstream Split Transaction
Commitment Limit
RW
DESCRIPTION
Upstream Split Transaction Capability specifies the size of the buffer (in the
unit of ADQs) to store split completions for memory read. It applies to the
requesters on the secondary bus in addressing the completers on the primary
bus. The 0010h value shows that the buffer has 16 ADQs or 2K bytes
storage
Reset to 0010h
Upstream Split Transaction Commitment Limit indicates the cumulative
sequence size of the commitment limit in units of ADQs. This field can be
programmed to any value or equal to the content of the split capability field.
For example, if the limit is set to FFFFh, PI7C9X110 is allowed to forward
all split requests of any size regardless of the amount of buffer space
available. The split transaction commitment limit is set to 0010h that is the
same value as the split transaction capability.
Reset to 0010h
7.5.59 DOWNSTREAM SPLIT TRANSACTION REGISTER – OFFSET 8Ch
BIT
15:0
FUNCTION
Downstream Split
Transaction Capability
31:16
Downstream Split
Transaction Commitment
Limit
TYPE
RO
DESCRIPTION
Downstream Split Transaction Capability specifies the size of the buffer (in
the unit of ADQs) to store split completions for memory read. It applies to
the requesters on the primary bus in addressing the completers on the
secondary bus. The 0010h value shows that the buffer has 16 ADQs or 2K
bytes storage
Reset to 0010h
Downstream Split Transaction Commitment Limit indicates the cumulative
sequence size of the commitment limit in units of ADQs. This field can be
programmed to any value or equal to the content of the split capability field.
For example, if the limit is set to FFFFh, PI7C9X110 is allowed to forward
all split requests of any size regardless of the amount of buffer space
available. The split transaction commitment limit is set to 0010h that is the
same value as the split transaction capability.
RW
Reset to 0010h
7.5.60 POWER MANAGEMENT ID REGISTER – OFFSET 90h
BIT
7:0
FUNCTION
Power Management ID
TYPE
RO
DESCRIPTION
Power Management ID Register
Reset to 01h
Page 98 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
7.5.61 NEXT CAPABILITY POINTER REGISTER – OFFSET 90h
BIT
15:8
FUNCTION
Next Pointer
TYPE
RO
DESCRIPTION
Next pointer (point to Subsystem ID and Subsystem Vendor ID)
Reset to A8h
7.5.62 POWER MANAGEMENT CAPABILITY REGISTER – OFFSET 90h
BIT
18:16
FUNCTION
Version Number
TYPE
RO
DESCRIPTION
Version number that complies with revision 2.0 of the PCI Power
Management Interface specification.
19
PME Clock
RO
20
21
Reserved
Device Specific Initialization
(DSI)
RO
RO
24:22
AUX Current
RO
25
D1 Power Management
RO
Reset to 001
D1 power management is not supported
26
D2 Power Management
RO
Reset to 0
D2 power management is not supported
31:27
PME_L Support
RO
Reset to 0
PME_L is supported in D3 cold, D3 hot, and D0 states.
Reset to 010
PME clock is not required for PME_L generation
Reset to 0
Reset to 0
DSI – no special initialization of this function beyond the standard PCI
configuration header is required following transition to the D0 un-initialized
state
Reset to 0
000: 0mA
001: 55mA
010: 100mA
011: 160mA
100: 220mA
101: 270mA
110: 320mA
111: 375mA
Reset to 11001
7.5.63 POWER MANAGEMENT CONTROL AND STATUS REGISTER – OFFSET 94h
BIT
1:0
FUNCTION
Power State
TYPE
RW
DESCRIPTION
Power State is used to determine the current power state of PI7C9X110. If a
non-implemented state is written to this register, PI7C9X110 will ignore the
write data. When present state is D3 and changing to D0 state by
programming this register, the power state change causes a device reset
without activating the RESET_L of PCI bus interface
00: D0 state
01: D1 state not implemented
10: D2 state not implemented
11: D3 state
7:2
Reserved
RO
Reset to 00
Reset to 000000
Page 99 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
8
FUNCTION
PME Enable
TYPE
RWS
DESCRIPTION
0: PME_L assertion is disabled
1: PME_L assertion is enabled
12:9
Data Select
RO
Reset to 0
Data register is not implemented
14:13
Data Scale
RO
Reset to 0000
Data register is not implemented
15
PME Status
RWCS
Reset to 00
PME_L is supported
Reset to 0
7.5.64 PCI-TO-PCI SUPPORT EXTENSION REGISTER – OFFSET 94h
BIT
21:16
22
FUNCTION
Reserved
B2/B3 Support
TYPE
RO
RO
DESCRIPTION
Reset to 000000
0: B2 / B3 not support for D3hot
23
PCI Bus Power/Clock
Control Enable
RO
Reset to 0
0: PCI Bus Power/Clock Disabled
31:24
Data Register
RO
Reset to 0
Data register is not implemented
Reset to 00h
7.5.65 DOWNSTREAM MEMORY 0 TRANSLATED BASE REGISTER – OFFSET 98h
BIT
11:0
31:12
FUNCTION
Reserved
Downstream Memory 0
Translated Base
TYPE
RO
RW
DESCRIPTION
Reset to 000h
Define the translated base address for downstream memory transactions
whose initiator addresses fall into Downstream Memory 0 (above lower 4K
boundary) address range. The number of bits that are used for translated base
is determined by its setup register (offset 9Ch)
Reset to 00000h
7.5.66 DOWNSTREAM MEMORY 0 SETUP REGISTER – OFFSET 9Ch
BIT
0
FUNCTION
Type Selector
TYPE
RO
DESCRIPTION
0: Memory space is requested
2:1
Address Type
RO
(WS)
Reset to 0
00: 32-bit address space
01: 64-bit address space
3
Prefetchable Control
RO
(WS)
Reset to 00
0: Non-prefetchable
1: Prefetchable
11:4
30:12
Reserved
Base Address Register Size
RO
RO
(WS)
Reset to 0
Reset to 00h
0: Set the corresponding bit in the Base Address Register to read only.
1: Set the corresponding bit in the Base Address Register to read/write in
order to control the size of the address range.
Reset to 7FFFFh
Page 100 of 144
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April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
31
FUNCTION
Base Address Register
Enable
TYPE
RO
(WS)
DESCRIPTION
Always set to 1 when a bus master attempts to write a zero to this bit.
PI7C9X110 returns bit [31:12] as FFFFFh (for 4KB size).
Reset to 1
7.5.67 CAPABILITY ID REGISTER – OFFSET A0h
BIT
7:0
FUNCTION
Capability ID
TYPE
RO
DESCRIPTION
Capability ID for Slot Identification. SI is off by default but can be turned on
through EEPROM interface
Reset to 04h
Page 101 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
7.5.68 NEXT POINTER REGISTER – OFFSET A0h
BIT
15:8
FUNCTION
Next Pointer
TYPE
RO
DESCRIPTION
Next pointer – points to PCI Express capabilities register
Reset to B0h
7.5.69 SLOT NUMBER REGISTER – OFFSET A0h
BIT
20:16
FUNCTION
Expansion Slot Number
TYPE
RW
DESCRIPTION
Expansion slot number
21
First In Chassis
RW
Reset to 00000
First in chassis
23:22
Reserved
RO
Reset to 0
Reset to 00
7.5.70 CHASSIS NUMBER REGISTER – OFFSET A0h
BIT
31:24
FUNCTION
Chassis Number
TYPE
RW
DESCRIPTION
Chassis number
Reset to 00h
7.5.71 SECONDARY CLOCK AND CLKRUN CONTROL REGISTER – OFFSET A4h
BIT
1:0
FUNCTION
S_CLKOUT0 Enable
TYPE
RW
DESCRIPTION
S_CLKOUT (Slot 0) Enable for forward bridge mode only
00: enable S_CLKOUT0
01: enable S_CLKOUT0
10: enable S_CLKOUT0
11: disable S_CLKOUT0 and driven LOW
3:2
S_CLKOUT1 Enable
RW
Reset to 00
S_CLKOUT (Slot 1) Enable for forward bridge mode only
00: enable S_CLKOUT1
01: enable S_CLKOUT1
10: enable S_CLKOUT1
11: disable S_CLKOUT1 and driven LOW
5:4
S_CLKOUT2 Enable
RW
Reset to 00
S_CLKOUT (Slot 2) Enable for forward bridge mode only
00: enable S_CLKOUT2
01: enable S_CLKOUT2
10: enable S_CLKOUT2
11: disable S_CLKOUT2 and driven LOW
7:6
S_CLKOUT3 Enable
RW
Reset to 00
S_CLKOUT (Slot 3) Enable for forward bridge mode only
00: enable S_CLKOUT3
01: enable S_CLKOUT3
10: enable S_CLKOUT3
11: disable S_CLKOUT3 and driven LOW
Reset to 00
Page 102 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
8
FUNCTION
S_CLKOUT4 Enable
TYPE
RW
DESCRIPTION
S_CLKOUT (Device 1) Enable for forward bridge mode only
0: enable S_CLKOUT4
1: disable S_CLKOUT4 and driven LOW
9
S_CLKOUT5 Enable
Reset to 0
S_CLKOUT (Device 2) Enable for forward bridge mode only
RW
0: enable S_CLKOUT5
1: disable S_CLKOUT5 and driven LOW
10
S_CLKOUT6 Enable
Reset to 0
S_CLKOUT (Device 3) Enable for forward bridge mode only
RW
0: enable S_CLKOUT6
1: disable S_CLKOUT6 and driven LOW
11
S_CLKOUT7 Enable
Reset to 0
S_CLKOUT (Device 4) Enable for forward bridge mode only
RW
0: enable S_CLKOUT7
1: disable S_CLKOUT7 and driven LOW
12
S_CLKOUT8 Enable
Reset to 0
S_CLKOUT (the bridge) Enable for forward bridge mode only
RW
0: enable S_CLKOUT8
1: disable S_CLKOUT8 and driven LOW
13
Secondary Clock Stop Status
Reset to 0
Secondary clock stop status
RO
0: secondary clock not stopped
1: secondary clock stopped
14
Secondary Clkrun Protocol
Enable
RW
15
Clkrun Mode
RW
31:16
Reserved
RO
Reset to 0
0: disable protocol
1: enable protocol
Reset to 0
0: Stop the secondary clock only when bridge is at D3hot state
1: Stop the secondary clock whenever the secondary bus is idle and there are
no requests from the primary bus
Reset to 0
Reset to 0000h
7.5.72 DONWSTREAM I/O OR MEMORY 1 TRANSLATED BASE REGISTER – OFFSET A8h
BIT
5:0
31:6
FUNCTION
Reserved
Downstream I/O or Memory
1 Translated Base
TYPE
RO
RW
DESCRIPTION
Reset to 000000
Define the translated base address for downstream I/O or memory
transactions whose initiator addresses fall into Downstream I/O or Memory 1
address range. The number of bits that are used for translated base is
determined by its setup register (offset ACh)
Reset to 00000h
Page 103 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
7.5.73 DOWSTREAM I/O OR MEMORY 1 SETUP REGISTER – OFFSET ACh
BIT
0
FUNCTION
Type Selector
TYPE
RO
DESCRIPTION
0: Memory space is requested
2:1
Address Type
RO
(WS)
Reset to 0
00: 32-bit address space
01: 64-bit address space
3
Prefetchable Control
RO
(WS)
Reset to 00
0: Non-prefetchable
1: Prefetchable
5:4
30:6
Reserved
Base Address Register Size
RO
RO
(WS)
31
Base Address Register
Enable
RO
(WS)
Reset to 0
Reset to 00
0: Set the corresponding bit in the Base Address Register to read only.
1: Set the corresponding bit in the Base Address Register to read/write in
order to control the size of the address range. If memory space is selected,
bit [11:6] should be set to zeros.
Reset to 00000000h
0: Disable this Base Address Register
1: Enable this Base Address Register
Reset to 0
7.5.74 PCI EXPRESS CAPABILITY ID REGISTER – OFFSET B0h
BIT
7:0
FUNCTION
PCI Express Capability ID
TYPE
RO
DESCRIPTION
PCI Express capability ID
Reset to 10h
7.5.75 NEXT CAPABILITY POINTER REGISTER – OFFSET B0h
BIT
15:8
FUNCTION
Next Item Pointer
TYPE
RO
DESCRIPTION
Next item pointer (points to VPD register)
Reset to D8h
7.5.76 PCI EXPRESS CAPABILITY REGISTER – OFFSET B0h
BIT
19:16
23:20
FUNCTION
Capability Version
Device / Port Type
24
29:25
31:30
Slot Implemented
Interrupt Message Number
Reserved
TYPE
RO
RO
RO
RO
RO
DESCRIPTION
Reset to 1h
0000: PCI Express endpoint device
0001: Legacy PCI Express endpoint device
0100: Root port of PCI Express root complex
0101: Upstream port of PCI Express switch
0110: Downstream port of PCI Express switch
0111: PCI Express to PCI bridge
1000: PCI to PCI Express bridge
Others: Reserved
Reset to 7h for Forward Bridge or 8h for Reverse Bridge
Reset to 0 for Forward Bridge or 1 for Reverse Bridge
Reset to 0h
Reset to 0
Page 104 of 144
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April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
7.5.77 DEVICE CAPABILITY REGISTER – OFFSET B4h
BIT
2:0
FUNCTION
Maximum Payload Size
TYPE
RO
DESCRIPTION
000: 128 bytes
001: 256 bytes
010: 512 bytes
011: 1024 bytes
100: 2048 bytes
101: 4096 bytes
110: reserved
111: reserved
4:3
Phantom Functions
RO
Reset to 001
No phantom functions supported
5
8-bit Tag Field
RO
Reset to 00
8-bit tag field supported
8:6
Endpoint L0’s Latency
RO
Reset to 1
Endpoint L0’s acceptable latency
000: less than 64 ns
001: 64 – 128 ns
010: 128 – 256 ns
011: 256 – 512 ns
100: 512 ns – 1 us
101: 1 – 2 us
110: 2 – 4 us
111: more than 4 us
11:9
Endpoint L1’s Latency
RO
Reset to 000
Endpoint L1’s acceptable latency
000: less than 1 us
001: 1 – 2 us
010: 2 – 4 us
011: 4 – 8 us
100: 8 – 16 us
101: 16 – 32 us
110: 32 – 64 us
111: more than 64 us
12
13
14
17:15
25:18
Attention Button Present
Attention Indicator Present
Power Indicator Present
Reserved
Captured Slot Power Limit
Value
RO
RO
RO
RO
RO
Reset to 000
0: If Hot Plug is disabled
1: If Hot Plug is enabled at Forward Bridge
Reset to 0 when hot-plug is disabled or 1 when hot-plug is enabled through
strapping.
0: If Hot Plug is disabled
1: If Hot Plug is enable at Forward Bridge
Reset to 0 when hot-plug is disabled or 1 when hot-plug is enabled through
strapping.
0: If Hot Plug is disabled
1: If Hot Plug is enable at Forward Bridge
Reset to 0 when hot-plug is disabled or 1 when hot-plug is enabled through
strapping.
Reset to 000
These bits are set by the Set_Slot_Power_Limit message
Reset to 00h
Page 105 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
27:26
FUNCTION
Captured Slot Power Limit
Scale
31:28
Reserved
TYPE
RO
DESCRIPTION
This value is set by the Set_Slot_Power_Limit message
Reset to 00
Reset to 0h
RO
7.5.78 DEVICE CONTROL REGISTER – OFFSET B8h
BIT
0
4
FUNCTION
Correctable Error Reporting
Enable
Non-Fatal Error Reporting
Enable
Fatal Error Reporting Enable
Unsupported Request
Reporting Enable
Relaxed Ordering Enable
7:5
Max Payload Size
1
2
3
TYPE
RW
DESCRIPTION
Reset to 0h
RW
Reset to 0h
RW
RW
Reset to 0h
Reset to 0h
RO
Relaxed Ordering disabled
Reset to 0h
This field sets the maximum TLP payload size for the PI7C9X110
RW
000: 128 bytes
001: 256 bytes
010: 512 bytes
011:1024 bytes
100: 2048 bytes
101: 4096 bytes
110: reserved
111: reserved
8
9
Extended Tag Field Enable
Phantom Functions Enable
RW
RO
Reset to 000
Reset to 0
Phantom functions not supported
10
Auxiliary Power PM Enable
RO
Reset to 0
Auxiliary power PM not supported
11
No Snoop Enable
RO
Reset to 0
Bridge never sets the No Snoop attribute in the transaction it initiates
14:12
Maximum Read Request
Size
RW
Reset to 0
This field sets the maximum Read Request Size for the device as a requester
000: 128 bytes
001: 256 bytes
010: 512 bytes
011: 1024 bytes
100: 2048 bytes
101: 4096 bytes
110: reserved
111: reserved
15
Configuration Retry Enable
Reset to 2h
Reset to 0
RW
7.5.79 DEVICE STATUS REGISTER – OFFSET B8h
BIT
16
17
18
19
20
FUNCTION
Correctable Error Detected
Non-Fatal Error Detected
Fatal Error Detected
Unsupported Request
Detected
AUX Power Detected
TYPE
RWC
RWC
RWC
RWC
RO
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 1
Page 106 of 144
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April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
21
FUNCTION
Transaction Pending
31:22
Reserved
TYPE
RO
DESCRIPTION
0: No transaction is pending on transaction layer interface
1: Transaction is pending on transaction layer interface
Reset to 0
Reset to 0000000000
RO
7.5.80 LINK CAPABILITY REGISTER – OFFSET BCh
BIT
3:0
FUNCTION
Maximum Link Speed
TYPE
RO
DESCRIPTION
Indicates the maximum speed of the Express link
0001: 2.5Gb/s link
9:4
Maximum Link Width
Reset to 1
Indicates the maximum width of the Express link (x1 at reset)
RO
000000: reserved
000001: x1
000010: x2
000100: x4
001000: x8
001100: x12
010000: x16
100000: x32
11:10
ASPM Support
Reset to 000001
This field indicates the level of Active State Power Management Support
RO
00: reserved
01: L0’s entry supported
10: reserved
11: L0’s and L1’s supported
14:12
17:15
23:18
31:24
L0’s Exit Latency
L1’s Exit Latency
Reserved
Port Number
Reset to 11
Reset to 3h
Reset to 0h
Reset to 0h
Reset to 00h
RO
RO
RO
RO
7.5.81 LINK CONTROL REGISTER – OFFSET C0h
BIT
1:0
FUNCTION
ASPM Control
TYPE
RW
DESCRIPTION
This field controls the level of ASPM supported on the Express link
00: disabled
01: L0’s entry enabled
10: L1’s entry enabled
11: L0’s and L1’s entry enabled
Reset to 00
Reset to 0
Read completion boundary not supported
2
3
Reserved
Read Completion Boundary
(RCB)
RO
RO
4
Link Disable
RO /
RW
5
Retrain Link
RO /
RW
6
Common Clock
Configuration
RW
Reset to 0
RO for Forward Bridge
Reset to 0
RO for Forward Bridge
Reset to 0
Reset to 0
Page 107 of 144
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April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
7
15:8
FUNCTION
Extended Sync
Reserved
TYPE
RW
RO
DESCRIPTION
Reset to 0
Reset to 00h
Page 108 of 144
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April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
7.5.82 LINK STATUS REGISTER – OFFSET C0h
BIT
19:16
FUNCTION
Link Speed
TYPE
RO
DESCRIPTION
This field indicates the negotiated speed of the Express link
001: 2.5Gb/s link
25:20
Negotiated Link Width
RO
26
27
28
31:29
Link Train Error
Link Training
Slot Clock Configuration
Reserved
RO
RO
RO
RO
Reset to 1h
000000: reserved
000001: x1
000010: x2
000100: x4
001000: x8
001100: x12
010000: x16
100000: x32
Reset to 000001
Reset to 0
Reset to 0
Reset to 1
Reset to 0
7.5.83 SLOT CAPABILITY REGISTER – OFFSET C4h
BIT
0
1
2
3
4
5
6
14:7
16:15
18:17
31:19
FUNCTION
Attention Button Present
Power Controller Present
MRL Sensor Present
Attention Indicator Present
Power Indicator Present
Hot Plug Surprise
Hot Plug Capable
Slot Power Limit Value
Slot Power Limit Scale
Reserved
Physical Slot Number
TYPE
RO
DESCRIPTION
0: If Hot Plug is disabled
1: If Hot Plug is enabled at reverse bridge
Reset to 0 when hot-plug is disabled or 1 when hot-plug is enabled through
strapping.
Reset to 0
0: If Hot Plug is disabled
1: If Hot Plug is enabled at reverse bridge
RO
RO
Reset to 0 when hot-plug is disabled or 1 when hot-plug is enabled through
strapping.
0: If Hot Plug is disabled
1: If Hot Plug is enabled at reverse bridge
RO
Reset to 0 when hot-plug is disabled or 1 when hot-plug is enabled through
strapping.
0: If Hot Plug is disabled
1: If Hot Plug is enabled at reverse bridge
RO
Reset to 0 when hot-plug is disabled or 1 when hot-plug is enabled through
strapping.
Reset to 0
0: If Hot Plug is disabled
1: If Hot Plug is enabled at reverse bridge
RO
RO
Reset to 0 when hot-plug is disabled or 1 when hot-plug is enabled through
strapping.
Reset to 00h
Reset to 00
Reset to 00
Reset to 0
RO
RO
RO
RO
7.5.84 SLOT CONTROL REGISTER – OFFSET C8h
BIT
FUNCTION
TYPE
DESCRIPTION
Page 109 of 144
Pericom Semiconductor – Confidential
April 2010, Revision 3.0
PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
0
1
2
3
4
5
7:6
9:8
10
15:11
FUNCTION
Attention Button Present
Enable
Power Fault Detected Enable
MRL Sensor Changed
Enable
Presence Detect Changed
Enable
Command Completed
Interrupt Enable
Hot Plug Interrupt Enable
Attention Indicator Control
Power Indicator Control
Power Controller Control
Reserved
TYPE
RW
DESCRIPTION
Reset to 0
RW
RW
Reset to 0
Reset to 0
RW
Reset to 0
RW
Reset to 0
RW
RW
RW
RW
RO
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
7.5.85 SLOT STATUS REGISTER – OFFSET C8h
BIT
16
17
18
19
20
21
22
31:23
FUNCTION
Attention Button Pressed
Power Fault Detected
MRL Sensor Changed
Presence Detect Changed
Command Completed
MRL Sensor State
Presence Detect State
Reserved
TYPE
RO
RO
RO
RO
RO
RO
RO
RO
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
7.5.86 XPIP CONFIGURATION REGISTER 0 – OFFSET CCh
BIT
0
1
2
3
4
7:5
12:8
15:13
31:16
FUNCTION
Hot Reset Enable
Loopback Function Enable
Cross Link Function Enable
Software Direct to
Configuration State when in
LTSSM state
Internal Selection for Debug
Mode
Negotiate Lane Number of
Times
TS1 Number Counter
Reserved
LTSSM Enter L1 Timer
Default Value
TYPE
RW
RW
RW
RW
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
RW
Reset to 0
RW
Reset to 3h
RW
RO
RW
Reset to 10h
Reset to 0
Reset to 0400h
7.5.87 XPIP CONFIGURATION REGISTER 1 – OFFSET D0h
BIT
9:0
15:10
31:16
FUNCTION
L0’s Lifetime Timer
Reserved
L1 Lifetime Timer
TYPE
RW
RO
RW
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
7.5.88 XPIP CONFIGURATION REGISTER 2 – OFFSET D4h
BIT
7:0
FUNCTION
CDR Recovery Time (in the
number of FTS order sets)
14:8
L0’s Exit to L0 Latency
TYPE
RW
RW
DESCRIPTION
Reset to 54h
A Fast Training Sequence order set composes of one K28.5 (COM) Symbol
and three K28.1 Symbols.
Reset to 2h
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BIT
15
22:16
31:23
FUNCTION
Reserved
L1 Exit to L0 Latency
Reserved
TYPE
RO
RW
RO
DESCRIPTION
Reset to 0
Reset to 19h
Reset to 0
7.5.89 CAPABILITY ID REGISTER – OFFSET D8h
BIT
7:0
FUNCTION
Capability ID for VPD
Register
TYPE
RO
DESCRIPTION
Reset to 03h
7.5.90 NEXT POINTER REGISTER – OFFSET D8h
BIT
15:8
FUNCTION
Next Pointer
TYPE
RO
DESCRIPTION
Next pointer (F0h, points to MSI capabilities)
Reset to F0h
7.5.91 VPD REGISTER – OFFSET D8h
BIT
17:16
23:18
30:24
31
FUNCTION
Reserved
VPD Address for
Read/Write Cycle
Reserved
VPD Operation
TYPE
RO
RW
RO
RW
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
0: Generate a read cycle from the EEPROM at the VPD address specified in
bits [7:2] of offset D8h. This bit remains at ‘0’ until EEPROM cycle is
finished, after which the bit is then set to ‘1’. Data for reads is available at
register ECh.
1: Generate a write cycle to the EEPROM at the VPD address specified in
bits [7:2] of offset D8h. This bit remains at ‘1’ until EEPROM cycle is
finished, after which it is then cleared to ‘0’.
Reset to 0
7.5.92 VPD DATA REGISTER – OFFSET DCh
BIT
31:0
FUNCTION
VPD Data
TYPE
RW
DESCRIPTION
VPD Data (EEPROM data [address + 0x40])
The least significant byte of this register corresponds to the byte of VPD at
the address specified by the VPD address register. The data read form or
written to this register uses the normal PCI byte transfer capabilities.
Reset to 0
7.5.93 UPSTREAM MEMORY 0 TRANSLATED BASE REGISTER – OFFSET E0h
BIT
11:0
31:12
FUNCTION
Reserved
Downstream Memory 0
Translated Base
TYPE
RO
RW
DESCRIPTION
Reset to 000h
Define the translated base address for upstream memory transactions whose
initiator addresses fall into Upstream Memory 0 (above lower 4K boundary)
address range. The number of bits that are used for translated base is
determined by its setup register (offset E4h)
Reset to 00000h
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7.5.94 UPSTREAM MEMORY 0 SETUP REGISTER – OFFSET E4h
BIT
0
FUNCTION
Type Selector
TYPE
RO
DESCRIPTION
0: Memory space is requested
2:1
Address Type
RO
(WS)
Reset to 0
00: 32-bit address space
01: 64-bit address space
3
Prefetchable Control
RO
(WS)
Reset to 00
0: Non-prefetchable
1: Prefetchable
11:4
30:12
Reserved
Base Address Register Size
RO
RO
(WS)
31
Base Address Register
Enable
RO
(WS)
Reset to 0
Reset to 00h
0: Set the corresponding bit in the Base Address Register to read only.
1: Set the corresponding bit in the Base Address Register to read/write in
order to control the size of the address range.
Reset to 00000h
Always set to 1 when a bus master attempts to write a zero to this bit.
PI7C9X110 returns bit [31:12] as FFFFFh (for 4KB size).
Reset to 1
7.5.95 UPSTREAM I/O OR MEMORY 1 TRANSLATED BASE REGISTER – OFFSET E8h
BIT
5:0
31:6
FUNCTION
Reserved
Upstream I/O or Memory 1
Translated Base
TYPE
RO
RW
DESCRIPTION
Reset to 000000
Define the translated base address for upstream I/O or memory transactions
whose initiator addresses fall into Upstream I/O or Memory 1 address range.
The number of bits that are used for translated base is determined by its setup
register (offset ECh)
Reset to 00000h
7.5.96 UPSTREAM I/O OR MEMORY 1 SETUP REGISTER – OFFSET ECh
BIT
0
FUNCTION
Type Selector
TYPE
RO
DESCRIPTION
0: Memory space is requested
2:1
Address Type
RO
(WS)
Reset to 0
00: 32-bit address space
01: 64-bit address space
3
Prefetchable Control
RO
(WS)
Reset to 00
0: Non-prefetchable
1: Prefetchable
5:4
30:6
Reserved
Base Address Register Size
RO
RO
(WS)
Reset to 0
Reset to 00
0: Set the corresponding bit in the Base Address Register to read only.
1: Set the corresponding bit in the Base Address Register to read/write in
order to control the size of the address range. If memory space is selected,
bit [11:6] should be set to zeros.
Reset to 00000000h
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
31
FUNCTION
Base Address Register
Enable
TYPE
RO
(WS)
DESCRIPTION
0: Disable this Base Address Register
1: Enable this Base Address Register
Reset to 0
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7.5.97 MESSAGE SIGNALED INTERRUPTS ID REGISTER – F0h
BIT
7:0
FUNCTION
Capability ID for MSI
Registers
TYPE
RO
DESCRIPTION
Reset to 05h
7.5.98 NEXT CAPABILITIES POINTER REGISTER – F0h
BIT
15:8
FUNCTION
Next Pointer
TYPE
RO
DESCRIPTION
Next pointer (00h indicates the end of capabilities)
Reset to 00h
7.5.99 MESSAGE CONTROL REGISTER – OFFSET F0h
BIT
16
FUNCTION
MSI Enable
TYPE
RW
19:17
Multiple Message Capable
RO
22:20
Multiple Message Enable
RW
23
31:24
64-bit Address Capable
Reserved
RW
RO
DESCRIPTION
0: Disable MSI and default to INTx for interrupt
1: Enable MSI for interrupt service and ignore INTx interrupt pins
000: 1 message requested
001: 2 messages requested
010: 4 messages requested
011: 8 messages requested
100: 16 messages requested
101: 32 messages requested
110: reserved
111: reserved
Reset to 000
000: 1 message requested
001: 2 messages requested
010: 4 messages requested
011: 8 messages requested
100: 16 messages requested
101: 32 messages requested
110: reserved
111: reserved
Reset to 000
Reset to 1
Reset to 00h
7.5.100 MESSAGE ADDRESS REGISTER – OFFSET F4h
BIT
1:0
31:2
FUNCTION
Reserved
System Specified Message
Address
TYPE
RO
RW
DESCRIPTION
Reset to 00
Reset to 0
7.5.101 MESSAGE UPPER ADDRESS REGISTER – OFFSET F8h
BIT
31:0
FUNCTION
System Specified Message
Upper Address
TYPE
RW
DESCRIPTION
Reset to 0
7.5.102 MESSAGE DATA REGISTER – OFFSET FCh
BIT
FUNCTION
TYPE
DESCRIPTION
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
15:0
31:16
FUNCTION
System Specified Message
Data
Reserved
TYPE
RW
RO
DESCRIPTION
Reset to 0
Reset to 0
7.5.103 ADVANCE ERROR REPORTING CAPABILITY ID REGISTER – OFFSET 100h
BIT
15:0
FUNCTION
Advance Error Reporting
Capability ID
TYPE
RO
DESCRIPTION
Reset to 0001h
7.5.104 ADVANCE ERROR REPORTING CAPABILITY VERSION REGISTER – OFFSET 100h
BIT
19:16
FUNCTION
Advance Error Reporting
Capability Version
TYPE
RO
DESCRIPTION
Reset to 1h
7.5.105 NEXT CAPABILITY OFFSET REGISTER – OFFSET 100h
BIT
31:20
FUNCTION
Next Capability Offset
TYPE
RO
DESCRIPTION
Next capability offset (150h points to VC capability)
Reset to 150h
7.5.106 UNCORRECTABLE ERROR STATUS REGISTER – OFFSET 104h
BIT
0
3:1
4
11:5
12
13
14
15
16
17
18
19
20
31:21
FUNCTION
Training Error Status
Reserved
Data Link Protocol Error
Status
Reserved
Poisoned TLP Status
Flow Control Protocol Error
Status
Completion Timeout Status
Completer Abort Status
Unexpected Completion
Status
Receiver Overflow Status
Malformed TLP Status
ECRC Error Status
Unsupported Request Error
Status
Reserved
TYPE
RWCS
RO
RWCS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
RO
RWCS
RWCS
Reset to 0
Reset to 0
Reset to 0
RWCS
RWCS
RWCS
Reset to 0
Reset to 0
Reset to 0
RWCS
RWCS
RWCS
RWCS
Reset to 0
Reset to 0
Reset to 0
Reset to 0
RO
Reset to 0
7.5.107 UNCORRECTABLE ERROR MASK REGISTER – OFFSET 108h
BIT
0
3:1
4
11:5
12
13
14
15
FUNCTION
Training Error Mast
Reserved
Data Link Protocol Error
Mask
Reserved
Poisoned TLP Mask
Flow Control Protocol Error
Mask
Completion Timeout Mask
Completion Abort Mask
TYPE
RWS
RO
RWS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
RO
RWS
RWS
Reset to 0
Reset to 0
Reset to 0
RWS
RWS
Reset to 0
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
16
17
18
19
20
31:21
FUNCTION
Unexpected Completion
Mask
Receiver Overflow Mask
Malformed TLP Mask
ECRC Error Mask
Unsupported Request Error
Mask
Reserved
TYPE
RWS
DESCRIPTION
Reset to 0
RWS
RWS
RWS
RWS
Reset to 0
Reset to 0
Reset to 0
Reset to 0
RO
Reset to 0
7.5.108 UNCORRECTABLE ERROR SEVERITY REGISTER – OFFSET 10Ch
BIT
0
3:1
4
11:5
12
13
14
15
16
17
18
19
20
31:21
FUNCTION
Training Error Severity
Reserved
Data Link Protocol Error
Severity
Reserved
Poisoned TLP Severity
Flow Control Protocol Error
Severity
Completion Timeout
Severity
Completer Abort Severity
Unexpected Completion
Severity
Receiver Overflow Severity
Malformed TLP Severity
ECRC Error Severity
Unsupported Request Error
Severity
Reserved
TYPE
RWS
RO
RWS
DESCRIPTION
Reset to 1
Reset to 0
Reset to 1
RO
RWS
RWS
Reset to 0
Reset to 0
Reset to 1
RWS
Reset to 0
RWS
RWS
Reset to 0
Reset to 0
RWS
RWS
RWS
RWS
Reset to 1
Reset to 1
Reset to 0
Reset to 0
RO
Reset to 0
7.5.109 CORRECTABLE ERROR STATUS REGISTER – OFFSET 110h
BIT
0
5:1
6
7
8
11:9
12
31:13
FUNCTION
Receiver Error Status
Reserved
Bad TLP Status
Bad DLLP Status
REPLAY_NUM Rollover
Status
Reserved
Replay Timer Timeout
Status
Reserved
TYPE
RWCS
RO
RWCS
RWCS
RWCS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
RO
RWCS
Reset to 0
Reset to 0
RO
Reset to 0
7.5.110 CORRECTABLE ERROR MASK REGISTER – OFFSET 114h
BIT
0
5:1
6
7
8
11:9
12
31:13
FUNCTION
Receiver Error Mask
Reserved
Bad TLP Mask
Bad DLLP Mask
REPLAY_NUM Rollover
Mask
Reserved
Replay Timer Timeout Mask
Reserved
TYPE
RWS
RO
RWS
RWS
RWS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
RO
RWS
RO
Reset to 0
Reset to 0
Reset to 0
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7.5.111 ADVANCED ERROR CAPABILITIES AND CONTROL REGISTER – OFFSET 118h
BIT
4:0
5
6
7
8
31:9
FUNCTION
First Error Pointer
ECRC Generation Capable
ECRC Generation Enable
ECRC Check Capable
ECRC Check Enable
Reserved
TYPE
ROS
RO
RWS
RO
RWS
RO
DESCRIPTION
Reset to 0h
Reset to 1
Reset to 0
Reset to 1
Reset to 0
Reset to 0
7.5.112 HEADER LOG REGISTER 1 – OFFSET 11Ch
BIT
7:0
15:8
23:16
31:24
FUNCTION
Header Byte 3
Header Byte 2
Header Byte 1
Header Byte 0
TYPE
ROS
ROS
ROS
ROS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
7.5.113 HEADER LOG REGISTER 2 – OFFSET 120h
BIT
7:0
15:8
23:16
31:24
FUNCTION
Header Byte 7
Header Byte 6
Header Byte 5
Header Byte 4
TYPE
ROS
ROS
ROS
ROS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
7.5.114 HEADER LOG REGISTER 3 – OFFSET 124h
BIT
7:0
15:8
23:16
31:24
FUNCTION
Header Byte 11
Header Byte 10
Header Byte 9
Header Byte 8
TYPE
ROS
ROS
ROS
ROS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
7.5.115 HEADER LOG REGISTER 4 – OFFSET 128h
BIT
7:0
15:8
23:16
31:24
FUNCTION
Header Byte 15
Header Byte 14
Header Byte 13
Header Byte 12
TYPE
ROS
ROS
ROS
ROS
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to 0
7.5.116 SECONDARY UNCORRECTABLE ERROR STATUS REGISTER – OFFSET 12Ch
BIT
0
1
2
3
4
5
FUNCTION
Target Abort on Split
Completion Status
Master Abort on Split
Completion Status
Received Target Abort
Status
Received Master Abort
Status
Reserved
Unexpected Split
Completion Error Status
TYPE
RWCS
DESCRIPTION
Reset to 0
RWCS
Reset to 0
RWCS
Reset to 0
RWCS
Reset to 0
RO
RWCS
Reset to 0
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
6
7
8
9
10
11
12
13
31:14
FUNCTION
Uncorrectable Split
Completion Message Data
Error Status
Uncorrectable Data Error
Status
Uncorrectable Attribute
Error Status
Uncorrectable Address Error
Status
Delayed Transaction Discard
Timer Expired Status
PERR_L Assertion Detected
Status
SERR_L Assertion Detected
Status
Internal Bridge Error Status
Reserved
TYPE
RWCS
DESCRIPTION
Reset to 0
RWCS
Reset to 0
RWCS
Reset to 0
RWCS
Reset to 0
RWCS
Reset to 0
RWCS
Reset to 0
RWCS
Reset to 0
RWCS
RO
Reset to 0
Reset to 0
7.5.117 SECONDARY UNCORRECTABLE ERROR MASK REGISTER – OFFSET 130h
BIT
0
1
2
3
4
5
6
7
8
9
10
11
12
13
31:14
FUNCTION
Target Abort on Split
Completion Mask
Master Abort on Split
Completion Mask
Received Target Abort Mask
Received Master Abort
Mask
Reserved
Unexpected Split
Completion Error Mask
Uncorrectable Split
Completion Message Data
Error Mask
Uncorrectable Data Error
Mask
Uncorrectable Attribute
Error Mask
Uncorrectable Address Error
Mask
Delayed Transaction Discard
Timer Expired Mask
PERR_L Assertion Detected
Mask
SERR_L Assertion Detected
Mask
Internal Bridge Error Mask
Reserved
TYPE
RWS
DESCRIPTION
Reset to 0
RWS
Reset to 0
RWS
RWS
Reset to 0
Reset to 1
RO
RWS
Reset to 0
Reset to 1
RWS
Reset to 0
RWS
Reset to 1
RWS
Reset to 1
RWS
Reset to 1
RWS
Reset to 1
RWS
Reset to 0
RWS
Reset to 1
RWS
RO
Reset to 0
Reset to 0
7.5.118 SECONDARY UNCORRECTABLE ERROR SEVERITY REGISTER – OFFSET 134h
BIT
0
1
2
3
4
FUNCTION
Target Abort on Split
Completion Severity
Master Abort on Split
Completion Severity
Received Target Abort
Severity
Received Master Abort
Severity
Reserved
TYPE
RWS
DESCRIPTION
Reset to 0
RWS
Reset to 0
RWS
Reset to 0
RWS
Reset to 0
RO
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
5
6
7
8
9
10
11
12
13
31:14
FUNCTION
Unexpected Split
Completion Error Severity
Uncorrectable Split
Completion Message Data
Error Severity
Uncorrectable Data Error
Severity
Uncorrectable Attribute
Error Severity
Uncorrectable Address Error
Severity
Delayed Transaction Discard
Timer Expired Severity
PERR_L Assertion Detected
Severity
SERR_L Assertion Detected
Severity
Internal Bridge Error
Severity
Reserved
TYPE
RWS
DESCRIPTION
Reset to 0
RWS
Reset to 1
RWS
Reset to 0
RWS
Reset to 1
RWS
Reset to 1
RWS
Reset to 0
RWS
Reset to 0
RWS
Reset to 1
RWS
Reset to 0
RO
Reset to 0
7.5.119 SECONDARY ERROR CAPABILITY AND CONTROL REGISTER – OFFSET 138h
BIT
4:0
31:5
FUNCTION
Secondary First Error
Pointer
Reserved
TYPE
ROW
RO
DESCRIPTION
Reset to 0
Reset to 0
7.5.120 SECONDARY HEADER LOG REGISTER – OFFSET 13Ch – 148h
BIT
35:0
FUNCTION
Transaction Attribute
TYPE
ROS
39:36
Transaction Command
Lower
ROS
43:40
Transaction Command
Upper
ROS
63:44
95:64
Reserved
Transaction Address
ROS
ROS
127:96
Transaction Address
ROS
DESCRIPTION
Transaction attribute, CBE [3:0] and AD [31:0] during attribute phase
Reset to 0
Transaction command lower, CBE [3:0] during first address phase
Reset to 0
Transaction command upper, CBE [3:0] during second address phase of
DAC transaction
Reset to 0
Reset to 0
Transaction address, AD [31:0] during first address phase
Reset to 0
Transaction address, AD [31:0] during second address phase of DAC
transaction
Reset to 0
7.5.121 RESERVED REGISTER – OFFSET 14Ch
7.5.122 VC CAPABILITY ID REGISTER – OFFSET 150h
BIT
15:0
FUNCTION
VC Capability ID
TYPE
RO
DESCRIPTION
Reset to 0002h
7.5.123 VC CAPABILITY VERSION REGISTER – OFFSET 150h
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
19:16
FUNCTION
VC Capability Version
TYPE
RO
DESCRIPTION
Reset to 1h
7.5.124 NEXT CAPABILITY OFFSET REGISTER – OFFSET 150h
BIT
31:20
FUNCTION
Next Capability Offset
TYPE
RO
DESCRIPTION
Next capability offset – the end of capabilities
Reset to 0
7.5.125 PORT VC CAPABILITY REGISTER 1 – OFFSET 154h
BIT
2:0
3
6:4
7
9:8
11:10
31:12
FUNCTION
Extended VC Count
Reserved
Low Priority Extended VC
Count
Reserved
Reference Clock
Port Arbitration Table Entry
Size
Reserved
TYPE
RO
RO
RO
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
RO
RO
RO
Reset to 0
Reset to 0
Reset to 0
RO
Reset to 0
7.5.126 PORT VC CAPABILITY REGISTER 2 – OFFSET 158h
BIT
7:0
23:8
31:24
FUNCTION
VC Arbitration Capability
Reserved
VC Arbitration Table Offset
TYPE
RO
RO
RO
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
7.5.127 PORT VC CONTROL REGISTER – OFFSET 15Ch
BIT
0
3:1
15:4
FUNCTION
Load VC Arbitration Table
VC Arbitration Select
Reserved
TYPE
RO
RO
RO
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
7.5.128 PORT VC STATUS REGISTER – OFFSET 15Ch
BIT
16
31:17
FUNCTION
VC Arbitration Table Status
Reserved
TYPE
RO
RO
DESCRIPTION
Reset to 0
Reset to 0
7.5.129 VC0 RESOURCE CAPABILITY REGISTER – OFFSET 160h
BIT
7:0
13:8
14
15
22:16
23
31:24
FUNCTION
Port Arbitration Capability
Reserved
Advanced Packet Switching
Reject Snoop Transactions
Maximum Time Slots
Reserved
Port Arbitration Table Offset
TYPE
RO
RO
RO
RO
RO
RO
RO
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
Reset to0
Reset to 0
Reset to 0
Reset to 0
7.5.130 VC0 RESOURCE CONTROL REGISTER – OFFSET 164h
BIT
FUNCTION
TYPE
DESCRIPTION
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
0
FUNCTION
TC / VC Map
TYPE
RO
7:1
TC / VC Map
RW
15:8
16
19:17
23:20
26:24
30:27
31
Reserved
Load Port Arbitration Table
Port Arbitration Select
Reserved
VC ID
Reserved
VC Enable
RO
RO
RO
RO
RO
RO
RO
DESCRIPTION
For TC0
Reset to 1
For TC7 to TC1
Reset to 7Fh
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 0
Reset to 1
7.5.131 VC0 RESOURCE STATUS REGISTER – OFFSET 168h
BIT
0
1
31:2
FUNCTION
Port Arbitration Table 1
VC0 Negotiation Pending
Reserved
TYPE
RO
RO
RO
DESCRIPTION
Reset to 0
Reset to 0
Reset to 0
7.5.132 RESERVED REGISTERS – OFFSET 16Ch – 300h
7.5.133 EXTRA GPI/GPO DATA AND CONTROL REGISTER – OFFSET 304h
BIT
3:0
FUNCTION
Extra GPO
TYPE
RWC
7:4
Extra GPO
RWS
11:8
Extra GPO enable
RWC
15:12
Extra GPO enable
RWS
19:16
Extra GPI
RO
31:20
Reserved
RO
DESCRIPTION
GPO [3:0], write 1 to clear
Reset to 0
GPO [3:0], write 1 to set
Reset to 0
GPO [3:0] enable, write 1 to clear
Reset to 0
GPO [3:0] enable, write 1 to set
Reset to 0
Extra GPI [3:0] Data Register
Reset to 0
Reset to 0
7.5.134 RESERVED REGISTERS – OFFSET 308h – 30Ch
7.5.135 REPLAY AND ACKNOWLEDGE LATENCY TIMERS – OFFSET 310h
BIT
11:0
FUNCTION
Replay Timer
12
Replay Timer Enable
RW
15:13
29:16
Reserved
Acknowledge Latency Timer
RO
RW
30
Acknowledge Latency Timer
Enable
Reserved
RO
31
TYPE
RW
RO
DESCRIPTION
Replay Timer
Reset to 0
Replay Timer Enable
Reset to 0
Reset to 0
Acknowledge Latency Timer
Reset to 0
Acknowledge Latency Timer Enable
Reset to 0
Reset to 0
7.5.136 RESERVED REGISTERS – OFFSET 314h – FFCh
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PCIe-to-PCI Reversible Bridge
7.6
CONTROL AND STATUS REGISTERS FOR NON-TRANSPARENT BRIDGE
MODE
Control and Status Registers (CSR’s) can be accessed by Memory or I/O transactions from both primary and
secondary ports. The CSR’s are defined and to be used along with configuration registers (see previous section 7.5
for details) for non-transparent bridge operations.
Register Type
RO
ROS
RW
RWC
RWS
RWCS
Descriptions
Read Only
Read Only and Sticky
Read/Write
Read/Write “1” to clear
Read/Write and Sticky
Read/Write “1” to clear and Sticky
7.6.1
RESERVED REGISTERS – OFFSET 000h TO 004h
7.6.2
DOWNSTREAM MEMORY 2 TRANSLATED BASE REGISTER – OFFSET 008h
BIT
11:0
31:12
FUNCTION
Reserved
Downstream Memory 2
Translated Base
TYPE
RO
RW
DESCRIPTION
Reset to 000h
Define the translated base address for downstream memory transactions
whose initiator addresses fall into Downstream Memory 2 address range. The
number of bits that are used for translated base is determined by its setup
register (offset 00Ch)
Reset to 00000h
7.6.3
DOWNSTREAM MEMORY 2 SETUP REGISTER – OFFSET 00Ch
BIT
0
FUNCTION
Type Selector
TYPE
RO
DESCRIPTION
0: Memory space is requested
2:1
Address Type
RO
(WS)
Reset to 0
00: 32-bit address space
01: 64-bit address space
3
Prefetchable Control
RO
(WS)
Reset to 00
0: Non-prefetchable
1: Prefetchable
11:4
30:12
Reserved
Base Address Register Size
RO
RO
(WS)
31
Base Address Register
Enable
RO
(WS)
Reset to 0
Reset to 00
0: Set the corresponding bit in the Base Address Register to read only
1: Set the corresponding bit in the Base Address Register to read/write in
order to control the size of the address range
Reset to 00000h
0: Disable this Base Address Register
1: Enable this Base Address Register
Reset to 0
7.6.4
DOWNSTREAM MEMORY 3 TRANSLATED BASE REGISTER – OFFSET 010h
BIT
11:0
FUNCTION
Reserved
TYPE
RO
DESCRIPTION
Reset to 000000
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
31:12
FUNCTION
Downstream Memory 3
Translated Base
TYPE
RW
DESCRIPTION
Define the translated base address for downstream memory transactions
whose initiator addresses fall into Downstream Memory 3 address range. The
number of bits that are used for translated base is determined by its setup
register (offset 014h)
Reset to 00000h
7.6.5
DOWNSTREAM MEMORY 3 SETUP REGISTER – OFFSET 014h
BIT
0
FUNCTION
Type Selector
TYPE
RO
DESCRIPTION
0: Memory space is requested
2:1
Address Type
RO
(WS)
Reset to 0
00: 32-bit address space
01: 64-bit address space
3
Prefetchable Control
RO
(WS)
Reset to 00
0: Non-prefetchable
1: Prefetchable
11:4
30:12
Reserved
Base Address Register Size
RO
RO
(WS)
31
Base Address Register
Enable
RO
(WS)
Reset to 0
Reset to 00
0: Set the corresponding bit in the Base Address Register to read only
1: Set the corresponding bit in the Base Address Register to read/write in
order to control the size of the address range
Reset to 00000h
0: Disable this Base Address Register
1: Enable this Base Address Register
Reset to 0
7.6.6
DOWNSTREAM MEMORY 3 UPPER 32-BIT SETUP REGISTER – OFFSET 018h
BIT
30:0
FUNCTION
Base Address Register Size
31
Base Address Register
Enable
TYPE
RW
RW)
DESCRIPTION
0: Set the corresponding bit in the Upper 32-bit Base Address Register to
read only
1: Set the corresponding bit in the Upper 32-bit Base Address Register to
read/write in order to control the size of the address range
Reset to 00000000h
0: Disable 64-bit Base Address Register
1: Enable 64-bit Base Address Register
Reset to 0
7.6.7
RESERVED REGISTERS – OFFSET 01Ch TO 030h
7.6.8
UPSTREAM MEMORY 3 SETUP REGISTER – OFFSET 34h
BIT
0
FUNCTION
Type Selector
TYPE
RO
2:1
Address Type
RO
DESCRIPTION
0: Memory space is requested
Reset to 0
00: 32-bit address space
01: 64-bit address space
Reset to 01
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
3
FUNCTION
Prefetchable Control
11:4
31:12
Reserved
Base Address Register Size
TYPE
RW
DESCRIPTION
0: Non-prefetchable
1: Prefetchable
Reset to 0
Reset to 00
0: Set the corresponding bit in the Base Address Register to read only
1: Set the corresponding bit in the Base Address Register to read/write in
order to control the size of the address range
RO
RW
Reset to 00000h
7.6.9
UPSTREAM MEMORY 3 UPPER 32-BIT SETUP REGISTER – OFFSET 038h
BIT
30:0
FUNCTION
Base Address Register Size
31
Base Address Register
Enable
TYPE
RW
DESCRIPTION
0: Set the corresponding bit in the Upper 32-bit Base Address Register to
read only
1: Set the corresponding bit in the Upper 32-bit Base Address Register to
read/write in order to control the size of the address range
Reset to 00000000h
0: Disable 64-bit Base Address Register
1: Enable 64-bit Base Address Register
RW
Reset to 0
7.6.10 RESERVED REGISTERS – OFFSET 03Ch TO 04Ch
7.6.11 LOOKUP TABLE OFFSET – OFFSET 050h
BIT
7:0
FUNCTION
Lookup Table Offset
31:8
Reserved
TYPE
RW
DESCRIPTION
This register contains the byte offset of the Lookup Table Entry to be
accessed for upstream memory 2. The access is initiated when the lookup
Table Data Register is accessed. This register should be written first before
any Lookup Table Data access.
Reset to 00h
Reset to 0
RO
7.6.12 LOOKUP TABLE DATA – OFFSET 054h
BIT
0
FUNCTION
Valid
TYPE
RW
2:1
3
Reserved
Prefetchable
RO
RW
7:4
Reserved
RO
DESCRIPTION
0: Invalid lookup
1: Valid lookup
Reset to 0
Reset to 00
0: Memory address is non-prefetchable
1: Memory address is
Reset to 0
Reset to 0h
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PI7C9X110
PCIe-to-PCI Reversible Bridge
BIT
24:8
FUNCTION
Translated base or Reserved
31:25
Translated Base
TYPE
RW/RO
DESCRIPTION
Data written or read from the Lookup Table at the offset specified in the
Lookup Table Offset Register. When writing to this register, the data value
is written to the specified Lookup Table entry. When reading from this
register, the data reflects the data value from the specified Lookup Table
entry. The bit [24:8] is Translated Base Register bit when the lookup table
size is set to 256B range. The bit [24:8] is reserved when the lookup table
size is set to 32MB range (see PCI configuration offset 68h for nontransparent mode).
Reset to 0
Data written or read from the Lookup Table at the offset specified in the
Lookup Table Offset Register. When writing to this register, the data value
is written to a specific Lookup Table entry (CSR offset 100h – 1FFh). When
reading from this register, the data reflects the data value from the specific
Lookup Table entry.
RW
Reset to 0
7.6.13 UPSTREAM PAGE BOUNDARY IRQ 0 REQUEST REGISTER – OFFSET 058h
BIT
31:0
FUNCTION
Upstream Page Boundary
IRQ 0
TYPE
RWC
DESCRIPTION
Each interrupt request bit is correspondent to a page entry in the lower half of
the Upstream Memory 2 range. Bit [0] is for the first page, and bit [31] is for
the 32nd page. PI7C9X110 sets the appropriate bit when it successfully
transfers data to or from the imitator that addresses the last Double Word in a
page. PI7C9X110 initiates an interrupt request on secondary interface when
the interrupt request bit is set and the corresponding Upstream Page
Boundary IRQ 0 Mask bit is reset. When forward bridge, PI7C9X110 asserts
INTA_L or generates MSI on secondary bus (PCI interface). When reverse
bridge, PI7C9X110 sends INTA_L assertion message or generates MSI on
secondary interface (PCI Express).
When writing a “1” to this register, it clears the corresponding interrupt
request bit.
Reset to 0
7.6.14 UPSTREAM PAGE BOUNDARY IRQ 1 REQUEST REGISTER – OFFSET 05Ch
BIT
31:0
FUNCTION
Upstream Page Boundary
IRQ 1
TYPE
RWC
DESCRIPTION
Each interrupt request bit is correspondent to a page entry in the lower half of
the Upstream Memory 2 range. Bit [0] is for the 33rd page, and bit [31] is for
the 64th page. PI7C9X110 sets the appropriate bit when it successfully
transfers data to or from the initiator that addresses the last Double Word in a
page. PI7C9X110 initiates an interrupt request on secondary interface when
the interrupt request bit is set and the corresponding Upstream Page
Boundary IRQ 1 Mask bit is reset. When forward bridge, PI7C9X110 asserts
INTA_L or generates MSI on secondary bus (PCI interface). When reverse
bridge, PI7C9X110 sends INTA_L assertion message or generates MSI on
secondary interface (PCI Express).
When wrting a “1” to this register, it clears the corresponding interrupt
request bit.
Reset to 0
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PI7C9X110
PCIe-to-PCI Reversible Bridge
7.6.15 UPSTREAM PAGE BOUNDARY IRQ 0 MASK REGISTER – OFFSET 060h
BIT
31:0
FUNCTION
Upstream Page Boundary
IRQ 0 Mask
TYPE
RWC
DESCRIPTION
0: PI7C9X110 can initiate an interrupt request when the correspondent
request bit is set
1: PI7C9X110 cannot initiate any interrupt request even though the
correspondent request bit is set
Reset to FFFFFFFFh
7.6.16 UPSTREAM PAGE BOUNDARY IRQ 1 MASK REGISTER – OFFSET 064h
BIT
31:0
FUNCTION
Upstream Page Boundary
IRQ 1 Mask
TYPE
RWC
DESCRIPTION
0: PI7C9X110 can initiate an interrupt request when the correspondent
request bit is set
1: PI7C9X110 cannot initiate any interrupt request even though the
correspondent request bit is set
Reset to FFFFFFFFh
7.6.17 RESERVED REGISTER – OFFSET 068C
7.6.18 PRIMARY CLEAR IRQ REGISTER – OFFSET 070h
BIT
15:0
FUNCTION
Primary Clear IRQ
TYPE
RWC
DESCRIPTION
When writing “1” to this register bit, it clears the correspondent interrupt
request bit.
When reading this register, it returns the interrupt request bit status:
0: It is not the bit that causes the interrupt request on primary interface
1: It is the bit that causes the interrupt request on primary interface
Reset to 0000h
7.6.19 SECONDARY CLEAR IRQ REGISTER – OFFSET 070h
BIT
31:16
FUNCTION
Secondary Clear IRQ
TYPE
RWC
DESCRIPTION
When writing “1” to this register bit, it clears the correspondent interrupt
request bit.
When reading this register, it returns the interrupt request bit status:
0: It is not the bit that causes the interrupt request on secondary interface
1: It is the bit that causes the interrupt request on secondary interface
Reset to 0000h
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PCIe-to-PCI Reversible Bridge
7.6.20 PRIMARY SET IRQ REGISTER – OFFSET 074h
BIT
15:0
FUNCTION
Primary Set IRQ
TYPE
RWS
DESCRIPTION
When writing “1” to this register bit, it set the correspondent interrupt request
bit.
When reading this register, it returns the interrupt request bit status:
0: It is not the bit that causes the interrupt request on primary interface
1: It is the bit that causes the interrupt request on primary interface
Reset to 0000h
7.6.21 SECONDARY SET IRQ REGISTER – OFFSET 074h
BIT
31:16
FUNCTION
Secondary Set IRQ
TYPE
RWS
DESCRIPTION
When writing “1” to this register bit, it set the correspondent interrupt request
bit.
When reading this register, it returns the interrupt request bit status:
0: It is not the bit that causes the interrupt request on secondary interface
1: It is the bit that causes the interrupt request on secondary interface
Reset to 0000h
7.6.22 PRIMARY CLEAR IRQ MASK REGISTER – OFFSET 078h
BIT
15:0
FUNCTION
Primary Clear IRQ Mask
TYPE
RWS
DESCRIPTION
When writing “1” to this register bit, it clears the correspondent interrupt
request mask bit.
When reading this register, it returns the primary Clear IRQ Mask bit status:
0: It allows to clear an interrupt request on primary interface
1: It does not allow to clear any interrupt request on primary interface
Reset to FFFFh
7.6.23 SECONDARY CLEAR IRQ MASK REGISTER – OFFSET 078h
BIT
31:16
FUNCTION
Secondary Clear IRQ Mask
TYPE
RWS
DESCRIPTION
When writing “1” to this register bit, it clears the correspondent interrupt
request mask bit.
When reading this register, it returns the Secondary Clear IRQ Mask bit
status:
0: It allows to clear an interrupt request on secondary interface
1: It does not allow to clear any interrupt request on secondary interface
Reset to FFFFh
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PI7C9X110
PCIe-to-PCI Reversible Bridge
7.6.24 PRIMARY SET IRQ MASK REGISTER – OFFSET 07Ch
BIT
15:0
FUNCTION
Primary Set IRQ Mask
TYPE
RWS
DESCRIPTION
When writing “1” to this register bit, it set the correspondent interrupt request
mask bit.
When reading this register, it returns the Primary Set IRQ Mask bit status:
0: It allows to set an interrupt request on primary interface
1: It does not allow to set any interrupt request on primary interface
Reset to FFFFh
7.6.25 SECONDARY SET IRQ MASK REGISTER – OFFSET 07Ch
BIT
31:16
FUNCTION
Secondary Set IRQ Mask
TYPE
RWC
DESCRIPTION
When writing “1” to this register bit, it set the correspondent interrupt request
mask bit.
When reading this register, it returns the Secondary Set IRQ Mask bit status:
0: It allows to set an interrupt request on secondary interface
1: It does not allow to set any interrupt request on secondary interface
Reset to FFFFh
7.6.26 RESERVED REGISTERS – OFFSET 080h TO 09Ch
7.6.27 SCRATCHPAD 0 REGISTER – OFFSET 0A0h
BIT
31:0
FUNCTION
Scratchpad 0
TYPE
RW
DESCRIPTION
The scratchpad is a 32-bit internal register that can be accessed from both
primary and secondary interfaces. The external devices can use the
scratchpad as a temporary storage. Primary and secondary bus devices can
communicate through the scratchpad. However, writing and reading the
scratchpad does not generate any interrupt request.
Reset to 00000000h
7.6.28 SCRATCHPAD 1 REGISTER – OFFSET 0A4h
BIT
31:0
FUNCTION
Scratchpad 1
TYPE
RW
DESCRIPTION
The scratchpad is a 32-bit internal register that can be accessed from both
primary and secondary interfaces. The external devices can use the
scratchpad as a temporary storage. Primary and secondary bus devices can
communicate through the scratchpad. However, writing and reading the
scratchpad does not generate any interrupt request.
Reset to 00000000h
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7.6.29 SCRATCHPAD 2 REGISTER – OFFSET 0A8h
BIT
31:0
FUNCTION
Scratchpad 2
TYPE
RW
DESCRIPTION
The scratchpad is a 32-bit internal register that can be accessed from both
primary and secondary interfaces. The external devices can use the
scratchpad as a temporary storage. Primary and secondary bus devices can
communicate through the scratchpad. However, writing and reading the
scratchpad does not generate any interrupt request.
Reset to 00000000h
7.6.30 SCRATCHPAD 3 REGISTER – OFFSET 0ACh
BIT
31:0
FUNCTION
Scratchpad 3
TYPE
RW
DESCRIPTION
The scratchpad is a 32-bit internal register that can be accessed from both
primary and secondary interfaces. The external devices can use the
scratchpad as a temporary storage. Primary and secondary bus devices can
communicate through the scratchpad. However, writing and reading the
scratchpad does not generate any interrupt request.
Reset to 00000000h
7.6.31 SCRATCHPAD 4 REGISTER – OFFSET 0B0h
BIT
31:0
FUNCTION
Scratchpad 4
TYPE
RW
DESCRIPTION
The scratchpad is a 32-bit internal register that can be accessed from both
primary and secondary interfaces. The external devices can use the
scratchpad as a temporary storage. Primary and secondary bus devices can
communicate through the scratchpad. However, writing and reading the
scratchpad does not generate any interrupt request.
Reset to 00000000h
7.6.32 SCRATCHPAD 5 REGISTER – OFFSET 0B4h
BIT
31:0
FUNCTION
Scratchpad 5
TYPE
RW
DESCRIPTION
The scratchpad is a 32-bit internal register that can be accessed from both
primary and secondary interfaces. The external devices can use the
scratchpad as a temporary storage. Primary and secondary bus devices can
communicate through the scratchpad. However, writing and reading the
scratchpad does not generate any interrupt request.
Reset to 00000000h
7.6.33 SCRATCHPAD 6 REGISTER – OFFSET 0B8h
BIT
31:0
FUNCTION
Scratchpad 6
TYPE
RW
DESCRIPTION
The scratchpad is a 32-bit internal register that can be accessed from both
primary and secondary interfaces. The external devices can use the
scratchpad as a temporary storage. Primary and secondary bus devices can
communicate through the scratchpad. However, writing and reading the
scratchpad does not generate any interrupt request.
Reset to 00000000h
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7.6.34 SCRATCHPAD 7 REGISTER – OFFSET 0BCh
BIT
31:0
FUNCTION
Scratchpad 7
TYPE
RW
DESCRIPTION
The scratchpad is a 32-bit internal register that can be accessed from both
primary and secondary interfaces. The external devices can use the
scratchpad as a temporary storage. Primary and secondary bus devices can
communicate through the scratchpad. However, writing and reading the
scratchpad does not generate any interrupt request.
Reset to 00000000h
7.6.35 RESERVED REGISTERS – OFFSET 0C0h TO 0FCh
7.6.36 LOOKUP TABLE REGISTERS – OFFSET 100h TO 1FCh
BIT
2047:0
FUNCTION
Lookup Table
TYPE
RW
DESCRIPTION
The lookup table has 64 entries. Each entry has 32-bit mapped to each page
of the Upstream Memory 2 base address range
64th page: bit [2047:2016]
62nd page: bit [1983:1952]
60th page: bit [1919:1888]
58th page: bit [1855:1824]
56th page: bit [1791:1760]
54th page: bit [1727:1696]
52nd page: bit [1663:1632]
50th page: bit [1599:1568]
48th page: bit [1535:1504]
46th page: bit [1471:1440]
44th page: bit [1407:1376]
42nd page: bit [1343:1312]
40th page: bit [1279:1248]
38th page: bit [1215:1184]
36th page: bit [1151:1120]
34th page: bit [1087:1056]
32nd page: bit [1023:992]
30th page: bit [959:928]
28th page: bit [895:864]
26th page: bit [831:800]
24th page: bit [767:736]
22nd page: bit [703:672]
20th page: bit [639:608]
18th page: bit [575:544]
16th page: bit [511:480]
14th page: bit [447:416]
12th page: bit [382:352]
10th page: bit [319:288]
8th page: bit [255:224]
6th page: bit [191:160]
4th page: bit [127:96]
2nd page: bit [63:32]
63rd page: bit [2015:1984]
61st page: bit [1951:1920]
59th page: bit [1887:1856]
57th page: bit [1823:1792]
55th page: bit [1759:1728]
53rd page: bit [1695:1664]
51st page: bit [1631:1600]
49th page: bit [1567:1536]
47th page: bit [1503:1472]
45th page: bit [1439:1408]
43rd page: bit [1375:1344]
41st page: bit [1311:1280]
39th page: bit [1247:1216]
37th page: bit [1183:1152]
35th page: bit [1119:1088]
33rd page: bit [1055:1024]
31st page: bit [991:960]
29th page: bit [927:896]
27th page: bit [863:832]
25th page: bit [799:768]
23rd page: bit [735:704]
21st page: bit [671:640]
19th page: bit [607:576]
17th page: bit [543:512]
15th page: bit [479:448]
13th page: bit [415:383]
11th page: bit [351:320]
9th page: bit [287:256]
7th page: bit [223:192]
5th page: bit [159:128]
3rd page: bit [95:64]
1st page: bit [31:0]
Reset to unknown
7.6.37 RESERVED REGISTERS – OFFSET 200h TO FFCh
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8
GPIO PINS AND SM BUS ADDRESS
GPIO [3:1] of PI7C9X110 are defined for hot-plug usage if MSK_IN=1 during Reset. Please see configuration
register definition (offset 78h – 7Bh).
In Forward bridge:
GPIO[0] : PCI slot Card Presence Detection Input
GPIO[1] : Attention Button Pressed Input
GPIO[2] : Power Indication Output
GPIO[3] : Attention Indication Output
In Reverse bridge:
GPIO[0] : PCIe slot Card Presence Detection Input
GPIO[1] : MRL Sensor Input
GPIO[2] : Reserved
GPIO[3] : Reserved
GPIO [3:0] are also defined the address bits of SMBUS device ID if SM Bus is selected (TM1=1). The addressstrapping table of SMBUS with GPIO [3:0] pins is defined in the following table:
Table 8-1 SM Bus Device ID Strapping
SM Bus Address Bit
Address bit [7]
Address bit [6]
Address bit [5]
Address bit [4]
Address bit [3]
Address bit [2]
Address bit [1]
SM Bus device ID
=1
=1
=0
= GPIO [3]
= GPIO [2]
= GPIO [1]
= GPIO [0]
GPIO [3:0] pins can be further defined to serve other functions in the next generation Device.
Four GPI [3:0] and four GPO [3:0] have been added to PI7C9X110 when external arbiter is selected (CFN_L=1). If
external arbiter is selected, REQ_L [5:2] and GNT [5:2] will become the GPI [3:0] and GPO [3:0] respectively.
If Hot Plug Control is implemented thru PI7C9X110 device, the pin function of GPIO [3:0] configured in Forward
or Reverse Mode are defined as follow:
In Forward Mode:
GPIO[0] : PCI slot Card Presence Detection Input
GPIO[1] : Attention Button Pressed Input
GPIO[2] : Power Indication Output
GPIO[3] : Attention Indication Output
In Reverse Mode:
GPIO[0] : PCIe slot Card Presence Detection Input
GPIO[1] : MRL Sensor Input
GPIO[2] : Reserved
GPIO[3] : Reserved
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PCIe-to-PCI Reversible Bridge
9
CLOCK SCHEME
PCI Express interface:
PI7C9X110 requires 100MHz differential clock inputs through REFCLKP and REFCLKN Pins.
PCI interface:
PI7C9X110 requires PCI clock (up to 66MHz and at least 10MHz) to be connected to the CLKIN. PI7C9X110 uses
the CLKIN and generates nine clock outputs, CLKOUT [8:0]. Also, PI7C9X110 requires one of the CLKOUT
[8:0] (preferably CLKOUT [8]) to be connected to FBCLKIN for the PCI interface logic of PI7C9X110. The actual
number of masters supported will vary depending on the loading of the PCI bus. Typically, PI7C9X110 can support
up to four 66MHz PCI slots or eight 33MHz PCI slots.
The PI7C9X110 PCI Clock Outputs, CLKOUT [8:0], can be enabled or disabled through the configuration register.
10
INTERRUPTS
PI7C9X110 supports interrupt message packets on PCIe side. PI7C9X110 supports PCI interrupt (INTA, B, C, D)
pins or MSI (Message Signaled Interrupts) on PCI side. PCI interrupts and MSI are mutually exclusive. In order
words, if MSI is enabled, PCI interrupts will be disabled. PI7C9X110 support 64-bit addressing MSI.
In reverse bridge mode, PI7C9X110 maps the interrupt message packets to PCI interrupt pins or MSI if MSI is
enable (see configuration register bit [16] of Offset F0h).
In forward bridge mode, PI7C9X110 maps the PCI interrupts pins or MSI if enable on PCI side to interrupt message
packets on PCIe side.
There are eight interrupt message packets. They are Assert_INTA, Assert_INTB, Assert_INTC, Assert_INTD,
Deassert_INTA, Deassert_INTB, Deassert_INTC, and Deassert_INTD. These eight interrupt messages are mapped
to the four PCI interrupts (INTA, INTB, INTC, and INTD). See Table 10-1 for interrupt mapping information in
reverse bridge mode. PI7C9X110 tracks the PCI interrupt (INTA, INTB, INTC, and INTD) pins and maps them to
the eight interrupt messages. See Table 10-2 for interrupt mapping information in forward bridge mode.
Table 10-1 PCIe interrupt message to PCI interrupt mapping in reverse bridge mode
PCIe Interrupt messages (from sources of interrupt)
INTA message
INTB message
INTC message
INTD message
PCI Interrupts (to host controller)
INTA
INTB
INTC
INTD
Table 10-2 PCI interrupt to PCIe interrupt message mapping in forward bridge mode
PCI Interrupts (from sources of interrupts)
INTA
INTB
INTC
INTD
11
PCIe Interrupt message packets (to host controller)
INTA message
INTB message
INTC message
INTD message
EEPROM (I2C) INTERFACE AND SYSTEM MANAGEMENT BUS
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11.1 EEPROM (I2C) INTERFACE
PI7C9X110 supports EEPROM interface through I2C bus. In EEPROM interface, pin A2 is the EEPROM clock
(SCL) and pin A1 is the EEPROM data (SDL). When TM2 is strapped to low, TM1 selects EEPROM interface or
System Management Bus. To select EEPROM (I2C) interface, TM1 needs to be set to low. When EEPROM
interface is selected, SCL is an output. SCL is the I2C bus clock to the I2C device. In addition, SDL is a bidirectional signal for sending and receiving data.
11.2 SYSTEM MANAGEMENT BUS
PI7C9X110 supports SM bus protocol if TM1=1 when TM2 is strapped to low. In addition, SMBCLK (pin A2) and
SMBDAT (pin A1) are utilized as the clock and data pins respectively for the SM bus.
When SM bus interface is selected, SMBCLK pin is an input for the clock of SM bus and SMBDAT pin is an open
drain buffer that requires external pull-up resistor for proper operation.
12
HOT PLUG OPERATION
PI7C9X110 is not equipped with standard hot-plug controller (SHPC) integrated. However, PI7C9X110 supports
hot-plug signaling messages and registers to simplify the implementation of hot-plug system.
Using PI7C9X110 on motherboard:
•
•
PI7C9X110 supports hot-plug on PCI bus if forward bridging is selected (REVRSB=0).
PI7C9X110 supports hot-plug function on PCI Express bus when reverse bridge mode is selected
(REVRSB=1).
Using PI7C9X110 on add-in card:
•
•
•
•
PI7C9X110 supports hot-plug on PCI Express bus in forward bridge mode. Hot-plug messages will be
generated by PI7C9X110 based on the add-in card conditions.
PI7C9X110 supports hot-plug function on PCI bus when reverse bridge mode is selected. PI7C9X110 will
tri-state the PCI bus when RESET is asserted. Also, PI7C9X110 will de-assert INTA_L if RESET is
asserted. The state machine of PI7C9X110 PCI bus interface will remain idle if the RESET is asserted.
After RESET is de-asserted, PI7C9X110 will remain in idle state until an address phase containing a valid
address for PI7C9X110 or its downstream devices.
PI7C9X110 expects the REFCLK signal will be provided to its upstream PCI Express Port prior to the deassertion of RESET. The Downstream PCI Port of PI7C9X110 supports a range of frequency up to
66MHz.
PI7C9X110 also supports subsystem vendor and subsystem ID. PI7C9X110 will ignore target response
while the bus is idle.
PRSNT1# and PRSNT2# are not implemented on both PI7C9X110. The use of these two signals is mandatory on
an add-in card in order to support hot-plug.
13
RESET SCHEME
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PCIe-to-PCI Reversible Bridge
PI7C9X110 requires the fundamental reset (PERST_L) input for internal logic when it is set as forward bridge
mode. PI7C9X110 requires the PCI reset (RESET_L) input when it is set as reverse bridge mode. Also,
PI7C9X110 has a power-on-reset (POR) circuit to detect VDDCAUX power supply for auxiliary logic control.
• Cold Reset:
A cold reset is a fundamental or power-on reset that occurs right after the power is applied to PI7C9X110 (during
initial power up). See section 7.1.1 of PCI Express to PCI Bridge Specification, Revision 1.0 for details.
• Warm Reset:
A warm reset is a reset that triggered by the hardware without removing and re-applying the power sources to
PI7C9X110.
• Hot Reset:
A hot reset is a reset that used an in-band mechanism for propagating reset across a PCIe link to PI7C9X110.
PI7C9X110 will enter to training control reset when it receives two consecutive TS1 or TS2 order-sets with reset bit
set.
• DL_DOWN Reset:
If the PCIe link goes down, the Transaction and Data Link Layer will enter DL_DOWN status. PI7C9X110
discards all transactions and returns all logic and registers to initial state except the sticky registers.
Upon receiving reset (cold, warm, hot, or DL_DOWN) on PCIe interface, PI7C9X110 will generate PCI reset
(RESET_L) to the downstream devices on the PCI bus in forward bridge mode. The PCI reset de-assertion follows
the de-assertion of the reset received from PCIe interface. The reset bit of Bridge Control Register may be set
depending on the application. PI7C9X110 will tolerant to receive and process SKIP order-sets at an average
interval between 1180 to 1538 Symbol Times. PI7C9X110 does not keep PCI reset active when VD33 power is off
even though VAUX (3.3v) is supported. It is recommended to add a weak pull-down resistor on its application
board to ensure PCI reset is low when VD33 power is off (see section 7.3.2 of PCI Bus Power management
Specification Revision 1.1).
In reverse bridge mode, PI7C9X110 generates fundamental reset (PERST_L) and then 1024 TS1 order-sets with
reset bit set when PCI reset (RESET_L) is asserted to PI7C9X110. PI7C9X110 has scheduling skip order-set for
insertion at an interval between 1180 and 1538 Symbol Times.
PI7C9X110 transmits one Electrical Idle order-set and enters to Electrical Idle.
14
IEEE 1149.1 COMPATIBLE JTAG CONTROLLER
An IEEE 1149.1 compatible Test Access Port (TAP) controller and associated TAP pins are provided to support
boundary scan in PI7C9X110 for board-level continuity test and diagnostics. The TAP pins assigned are TCK, TDI,
TDO, TMS and TRST_L. All digital input, output, input/output pins are tested except TAP pins.
The IEEE 1149.1 Test Logic consists of a TAP controller, an instruction register, and a group of test data registers
including Bypass and Boundary Scan registers. The TAP controller is a synchronous 16-state machine driven by the
Test Clock (TCK) and the Test Mode Select (TMS) pins. An independent power on reset circuit is provided to
ensure the machine is in TEST_LOGIC_RESET state at power-up. The JTAG signal lines are not active when the
PCI resource is operating PCI bus cycles.
14.1 INSTRUCTION REGISTER
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PI7C9X110
PCIe-to-PCI Reversible Bridge
PI7C9X110 implements a 5-bit Instruction register to control the operation of the JTAG logic. The defined
instruction codes are shown in Table 14-1. Those bit combinations that are not listed are equivalent to the BYPASS
(11111) instruction:
Table 14-1 Instruction register codes
Instruction
EXTEST
SAMPLE
HIGHZ
CLAMP
Operation Code (binary)
00000
00001
00101
00100
Register Selected
Boundary Scan
Boundary Scan
Bypass
Bypass
IDCODE
01100
Device ID
BYPASS
INT_SCAN
MEM_BIST
11111
00010
01010
Bypass
Internal Scan
Memory BIST
Operation
Drives / receives off-chip test data
Samples inputs / pre-loads outputs
Tri-states output and I/O pins except TDO pin
Drives pins from boundary-scan register and selects Bypass register
for shifts
Accesses the Device ID register, to read manufacturer ID, part
number, and version number
Selected Bypass Register
Scan test
Memory BIST test
14.2 BYPASS REGISTER
The required bypass register (one-bit shift register) provides the shortest path between TDI and TDO when a bypass
instruction is in effect. This allows rapid movement of test data to and from other components on the board. This
path can be selected when no test operation is being performed on the PI7C9X110.
14.3 DEVICE ID REGISTER
This register identifies Pericom as the manufacturer of the device and details the part number and revision number
for the device.
Table 14-2 JTAG device ID register
Bit
31:28
27:12
11:1
0
Type
RO
RO
RO
RO
Value
01h
E110h
23Fh
1b
Description
Version number
Last 4 digits (hex) of the die part number
Pericom identifier assigned by JEDEC
Fixed bit equal to 1’b1
14.4 BOUNDARY SCAN REGISTER
The boundary scan register has a set of serial shift-register cells. A chain of boundary scan cells is formed by
connected the internal signal of the PI7C9X110 package pins. The VDD, VSS, and JTAG pins are not in the
boundary scan chain. The input to the shift register is TDI and the output from the shift register is TDO. There are 4
different types of boundary scan cells, based on the function of each signal pin.
The boundary scan register cells are dedicated logic and do not have any system function. Data may be loaded into
the boundary scan register master cells from the device input pins and output pin-drivers in parallel by the
mandatory SAMPLE and EXTEST instructions. Parallel loading takes place on the rising edge of TCK.
14.5 JTAG BOUNDARY SCAN REGISTER ORDER
Table 14-3 JTAG boundary scar register definition
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PI7C9X110
PCIe-to-PCI Reversible Bridge
Boundary Scan
Register Number
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
Pin Name
AD [0]
AD [1]
AD [2]
AD [3]
AD [4]
AD [5]
AD [6]
AD [7]
CBE [0]
AD [8]
AD [9]
AD [10]
AD [11]
AD [12]
AD [13]
AD [14]
AD [15]
CBE [1]
PAR
SERR_L
PERR_L
LOCK_L
STOP_L
DEVSEL_L
TRDY_L
IRDY_L
FRAME_L
CBE [2]
AD [16]
AD [17]
AD [18]
Ball Location
K14
J11
J13
J14
H12
H13
G11
G12
G14
F11
F13
F14
E13
D11
D12
D14
C12
C14
B13
B14
A14
A13
A12
B11
A11
D10
B10
A10
C9
B9
D8
Type
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
Tri-state Control Cell
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
47
50
52
54
56
58
60
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PCIe-to-PCI Reversible Bridge
Boundary Scan
Register Number
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
Pin Name
AD [19]
AD [20]
AD [21]
AD [22]
AD [23]
CBE [3]
AD [24]
AD [25]
AD [26]
AD [27]
AD [28]
AD [29]
AD [30]
AD [31]
PME_L
SMBCLK
SMBDAT
CLKRUN_L
FBCLKIN
RESERVED 0
RESERVED 1
PERST_L
REQ_L [0]
REQ_L [1]
REQ_L [2]
REQ_L [3]
REQ_L [4]
REQ_L [5]
REQ_L [6]
REQ_L [7]
INTA_L
GNT_L [0]
GNT_L [1]
GNT_L [2]
GNT_L [3]
GNT_L [4]
GNT_L [5]
Ball Location
C8
A8
D7
B7
A7
C6
B6
D5
C5
A5
D4
B4
A4
B3
A3
A2
A1
D3
C2
B1
D2
L3
M1
M2
M3
N1
N2
N3
P1
P2
P3
M4
N4
L5
M5
N5
P5
Type
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
INPUT
INPUT
OUTPUT3
CONTROL
BIDIR
CONTROL
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
BIDIR
CONTROL
OUTPUT3
CONTROL
OUTPUT3
OUTPUT3
OUTPUT3
OUTPUT3
OUTPUT3
Tri-state Control Cell
62
64
66
68
70
72
74
76
78
80
82
84
86
88
90
92
94
96
100
102
112
114
122
122
122
122
122
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PCIe-to-PCI Reversible Bridge
Boundary Scan
Register Number
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
15
Pin Name
GNT_L [6]
GNT_L [7]
INTB_L
CLKIN
RESET_L
CFN_L
GPIO [3]
GPIO [2]
GPIO [1]
GPIO [0]
CLKOUT [0]
CLKOUT [1]
CLKOUT [2]
CLKOUT [3]
CLKOUT [4]
CLKOUT [5]
CLKOUT [6]
CLKOUT [7]
CLKOUT [8]
INTC_L
REVRSB
INTD_L
MSK_IN
IDSEL
Ball Location
P6
N6
M6
P7
N7
M7
L7
P8
M8
L8
P9
N9
L9
P10
M10
L10
N11
P12
N12
P13
M12
N13
P14
N14
Type
OUTPUT3
OUTPUT3
CONTROL
BIDIR
CONTROL
INPUT
BIDIR
CONTROL
INPUT
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
BIDIR
CONTROL
OUTPUT3
OUTPUT3
OUTPUT3
OUTPUT3
OUTPUT3
OUTPUT3
OUTPUT3
OUTPUT3
OUTPUT3
CONTROL
BIDIR
CONTROL
INPUT
BIDIR
CONTROL
INPUT
INPUT
Tri-state Control Cell
122
122
124
126
129
131
133
135
145
145
145
145
145
145
145
145
145
148
151
-
POWER MANAGEMENT
PI7C9X110 supports D0, D3-hot, D3-cold Power States. D1 and D2 states are not supported. The PCI Express
Physical Link Layer of the PI7C9X110 device supports the PCI Express Link Power Management with L0, L0s, L1,
L2/L3 ready and L3 Power States. For the PCI Port of PI7C9X110, it supports the standard PCI Power
Management States with B0, B1, B2 and B3.
During D3-hot state, the main power supplies of VDDP, VDDC, and VD33 can be turned off to save power while
keeping the VDDAUX, VDDCAUX, and VAUX with the auxiliary power supplies to maintain all necessary
information to be restored to the full power D0 state. PI7C9X110 has been designed to have sticky registers that are
powered by auxiliary power supplies. PME_L pin allows PCI devices to request power management state changes.
Along with the operating system and application software, PCI devices can achieve optimum power saving by using
PME_L in forward bridge mode. PI7C9X110 converts PME_L signal information to power management messages
to the upstream switches or root complex. In reverse bridge mode, PI7C9X110 converts the power management
event messages from PCIe devices to the PME_L signal and continues to request power management state change
to the host bridge.
PI7C9X110 also supports ASPM (Active State Power Management) to facilitate the link power saving.
PI7C9X110 supports Beacon generation but does not support WAKE# signal.
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PCIe-to-PCI Reversible Bridge
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PI7C9X110
PCIe-to-PCI Reversible Bridge
16
ELECTRICAL AND TIMING SPECIFICATIONS
16.1 ABSOLUTE MAXIMUM RATINGS
Table 16-1 Absolute maximum ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
-65oC to 150oC
-40oC to 85oC
-0.3v to 3.0v
Storage Temperature
Ambient Temperature with power applied
PCI Express supply voltage to ground potential (VDDA, VDDP, VDDC,
VDDAUX, and VDDCAUX)
PCI supply voltage to ground potential (VD33 and VAUX)
DC input voltage for PCI Express signals
DC input voltage for PCI signals
-0.3v to 3.6v
-0.3v to 3.0v
-0.5v to 5.75v
Note:
Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or any conditions above those indicated in the operational sections of
this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect
reliability.
16.2 DC SPECIFICATIONS
Table 16-2 DC electrical characteristics
Power Pins
VDDA
VDDP
VDDC
VDDAUX
VDDCAUX
VTT
VD33
VAUX
Min.
1.6v
1.6v
1.6v
1.6v
1.6v
VDDC
3.0v
3.0v
Typ.
1.8v
1.8v
1.8v
1.8v
1.8v
VDDC
3.3v
3.3v
Max.
2.0v
2.0v
2.0v
2.0v
2.0v
2.0v
3.6v
3.6v
VDDA: analog power supply for PCI Express Interface
VDDP: digital power supply for PCI Express Interface
VDDAUX: digital auxiliary power supply for PCI Express Interface
VTT: termination power supply for PCI Express Interface
VDDC: digital power power supply for the core
VDDCAUX: digital auxiliary power supply for the core
VD33: digital power supply for PCI interface
VAUX: digital auxiliary power supply for PCI interface
In order to support auxiliary power management fully, it is recommended to have VDDP and VDDAUX separated.
By the same token, VD33/VDDC and VAUX/VDDCAUX need to be separated for auxiliary power management
support. However, if auxiliary power management is not required, VD33 and VDDC can be connected to VAUX
and VDDCAUX respectively.
The typical power consumption of PI7C9X110 is about 1.0 watt.
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PI7C9X110
PCIe-to-PCI Reversible Bridge
PI7C9X110 is capable of sustaining 2000V human body model for the ESD protection without any damages.
16.3 AC SPECIFICATIONS
Table 16-3 PCI bus timing parameters
Symbol
Tsu
Tsu (ptp)
Th
Tval
Tval (ptp)
Ton
Toff
1.
2.
3.
4.
Parameter
Input setup time to CLK – bused signals 1,2,3
Input setup time to CLK – point-to-point 1,2,3
Input signal hold time from CLK 1,2
CLK to signal valid delay – bused signals 1,2,3
CLK to signal valid delay – point-to-point 1,2,3
Float to active delay 1,2
Active to float delay 1,2
MIN
3
5
0
2
2
2
-
66 MHz
MAX
6
6
14
33 MHz
MIN
MAX
7
10, 124
0
2
11
2
12
2
28
Units
ns
See Figure 16 –1 PCI Signal Timing Measurement Conditions.
All PCI interface signals are synchronized to FBCLKIN.
Point-to-point signals are REQ_L [7:0], GNT_L [7:0], LOO, and ENUM_L. Bused signals are AD, CBE,
PAR, PERR_L, SERR_L, FRAME_L, IRDY_L, TRDY_L, LOCK_L, STOP_L and IDSEL.
REQ_L signals have a setup of 10ns and GNT_L signals have a setup of 12ns.
Figure 16-1 PCI signal timing conditions
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PI7C9X110
PCIe-to-PCI Reversible Bridge
17
PACKAGE INFORMATION
Figure 17-1 Top view drawing
Figure 17-2 Bottom view drawing
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PI7C9X110
PCIe-to-PCI Reversible Bridge
The package of PI7C9X110 is a 12mm x 12mm LFBGA (160 Pin) package. The ball pitch is 0.8mm and the ball
size is 0.5mm. The following are the package information and mechanical dimension:
Figure 17-3 Package outline drawing
18
ORDERING INFORMATION
PART NUMBER
PIN – PACKAGE
PB-FREE & GREEN
TEMPERATURE RANGE
PI7C9X110BNBE
PI7C9X110BNB
160 – LFBGA
160 – LFBGA
YES
NO
-40 TO +85C
-40 TO +85C
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PI7C9X110
PCIe-to-PCI Reversible Bridge
NOTES:
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