AMD SB820M Southbridge Databook

AMD SB820M Southbridge
Databook
Publication #
Issue Date:
47283
Revision: 2.10
Dec 2010
Advanced Micro Devices
47283 Rev. 2.10 Dec 2010
AMD SB820M Southbridge Databook
© 2010 Advanced Micro Devices, Inc. All
rights reserved.
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Micro Devices, Inc. (“AMD”) products. AMD makes no representations or
warranties with respect to the accuracy or completeness of the contents of this
publication and reserves the right to make changes to specifications and
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Other product names used in this publication are for identification purposes only and may be trademarks of their
respective companies.
47283 Rev. 2.10 Dec 2010
AMD SB820M Southbridge Databook
Contents
Chapter 1
Introduction ............................................................................................................ 12
1.1
Features of the SB820M Southbridge .............................................................................. 12
1.2
Part Numbers and Brandings ........................................................................................... 15
1.3
SB820M Southbridge Block Diagram ............................................................................. 18
1.4
Conventions and Notations .............................................................................................. 19
1.4.1
Pin Names ................................................................................................................ 19
1.4.2
Pin Types ................................................................................................................. 19
1.4.3
Numeric Representation........................................................................................... 19
1.4.4
Register Field ........................................................................................................... 20
1.4.5
Acronyms and Abbreviations .................................................................................. 20
Chapter 2
2.1
EHCI USB 2.0 and OHCI USB 1.1 Controllers .............................................................. 22
2.1.1
2.2
Functional Description .......................................................................................... 22
USB Power Management ......................................................................................... 24
SMI/SCI Generation ........................................................................................................ 26
2.2.1
Event Sources for SCI .............................................................................................. 26
2.2.2
SMI Events............................................................................................................... 27
2.2.3
SMI/SCI Work Flow ................................................................................................ 27
2.3
LPC ISA Bridge ............................................................................................................... 29
2.3.1
LPC Interface Overview .......................................................................................... 29
2.3.2
LPC Module Block Diagram ................................................................................... 31
2.4
Real Time Clock .............................................................................................................. 31
2.4.1
Functional Blocks of RTC ....................................................................................... 31
2.5
Serial ATA Controller ..................................................................................................... 32
2.6
PCI Bridge ....................................................................................................................... 33
2.7
High Definition Audio ..................................................................................................... 34
2.7.1
HD Audio Codec Connections................................................................................. 34
2.8
Clock Generation ............................................................................................................. 34
2.9
Power Management/ACPI ............................................................................................... 36
Chapter 3
Ballout Assignment ................................................................................................ 37
Chapter 4
Pin Descriptions ..................................................................................................... 39
4.1
CPU Interface Pin Descriptions ....................................................................................... 39
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AMD SB820M Southbridge Databook
4.2
LPC Interface Pin Descriptions ....................................................................................... 40
4.3
A-Link Express II Interface Pin Descriptions.................................................................. 40
4.4
General Purpose PCI Express® Ports Interface................................................................ 41
4.5
PCI Interface (PCI Host Bus and Internal PCI/PCI Bridge) ............................................ 41
4.6
USB Interface .................................................................................................................. 44
4.7
Flash Interface.................................................................................................................. 45
4.8
Serial ATA Interface ........................................................................................................ 46
4.9
HD Audio Interface ......................................................................................................... 47
4.10
Real Time Clock Interface ............................................................................................... 48
4.11
SPI ROM Interface .......................................................................................................... 48
4.12
Power Management Interface .......................................................................................... 49
4.13
SMBus Interface .............................................................................................................. 52
4.14
Reset / Clocks / ATE / JTAG........................................................................................... 53
4.15
General Purpose I/O and General Event .......................................................................... 58
4.16
Keyboard and PS/2 Controller ......................................................................................... 68
4.17
Gigabit Ethernet Media Access Controller (GbE MAC) ................................................. 69
4.18
Infrared Interface ............................................................................................................. 71
4.19
Power and Ground ........................................................................................................... 71
4.20
Integrated Resistors.......................................................................................................... 73
4.21
Strap Information ............................................................................................................. 74
Chapter 5
Power Sequence and Timing ................................................................................. 79
5.1
Power Sequence ............................................................................................................... 79
5.2
Reset Timing .................................................................................................................... 85
5.2.1
ROMRST# ............................................................................................................... 85
5.2.2
System Reset ............................................................................................................ 86
5.2.3
PCIe® Reset.............................................................................................................. 87
5.3
Power Button Timing....................................................................................................... 89
5.4
ACPI Timing.................................................................................................................... 90
5.4.1
S-State Timing ......................................................................................................... 90
5.4.2
S4 and S5 Timing..................................................................................................... 92
5.4.3
C-State Timing ......................................................................................................... 93
5.4.4
VID/FID Change Timing ......................................................................................... 95
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5.4.5
Timing Definitions and Descriptions ....................................................................... 97
5.4.6
Registers for S-State and C-State Timing ................................................................ 99
Chapter 6
Electrical Characteristics .................................................................................... 102
6.1
Absolute Ratings ............................................................................................................ 102
6.2
Functional Operating Range .......................................................................................... 102
6.3
DC Characteristics ......................................................................................................... 102
6.4
RTC Battery Current Consumption ............................................................................... 104
6.5
States of Power Rails during ACPI S1 to S5 States ...................................................... 105
6.6
System Clock Specifications ......................................................................................... 106
6.6.1
System Clock Descriptions .................................................................................... 106
6.6.2
System Clock Input Frequency Specifications ...................................................... 106
6.6.3
System Clock Output AC and DC Specifications.................................................. 106
Chapter 7
Package Information ........................................................................................... 110
7.1
Physical Dimensions ...................................................................................................... 110
7.2
Pressure Specification .................................................................................................... 111
7.3
Thermal Information ...................................................................................................... 111
7.4
Reflow Profile ................................................................................................................ 113
Chapter 8
Testability ............................................................................................................. 115
8.1
XOR Chain Test Mode .................................................................................................. 115
8.2
Test Control Signals....................................................................................................... 115
8.2.1
Brief Description of an XOR Chain....................................................................... 117
8.2.2
Description of the SB820M XOR Chain ............................................................... 118
Appendix A Pin Listing ............................................................................................................. 124
Contents
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AMD SB820M Southbridge Databook
List of Figures
Figure 1: SB820M Branding Diagrams for (a) Engineer Sample, (b) Production ASIC A12, (c)
Production ASIC A13 .............................................................................................................. 16
Figure 2. Block Diagram Showing the Internal PCI Devices and Major Function Blocks ............. 18
Figure 3. USB Controllers Block Diagram ...................................................................................... 23
Figure 4. SMI/SCI Logic of the SB820M ........................................................................................ 28
Figure 5. SB820M LPC Bus System ............................................................................................... 29
Figure 6. Block Diagram of LPC Module ....................................................................................... 31
Figure 7. Block Diagram of Internal RTC ....................................................................................... 32
Figure 8. Block Diagram for the SATA Module ............................................................................. 33
Figure 9. HD Audio Codec Connections ......................................................................................... 34
Figure 10. System Clock Generation ............................................................................................... 35
Figure 11: SB820M Ballout Assignment (Left) .............................................................................. 37
Figure 12: SB820M Ballout Assignment (Right) ............................................................................ 38
Figure 13. Straps Capture Timing .................................................................................................... 75
Figure 14. Power-on Sequence (S5  S0 S5) ............................................................................. 79
Figure 15. Power-on Sequence (S3  S0 S3) ............................................................................. 80
Figure 16. Timing for SB PWR_GOOD De-asserted to RSMRST# De-asserted ........................... 84
Figure 17. Measurement for RSMRST# Timing (T2A) .................................................................. 84
Figure 18. LDT_STP# Timing at First power-up, G3
G5, or after RSMRST# Assertion................ 85
Figure 19. ROM Reset Timing ........................................................................................................ 86
Figure 20. System Reset Timing ...................................................................................................... 87
Figure 21. PCIe® Reset Timing ....................................................................................................... 88
Figure 22. Power Button Timing ..................................................................................................... 89
Figure 23. S1-State Timing .............................................................................................................. 90
Figure 24. S3 State Timing .............................................................................................................. 91
Figure 25. S4 and S5 State Timing .................................................................................................. 92
Figure 26. C2/C3-State Timing........................................................................................................ 93
Figure 27. C3 Stutter Mode Timing................................................................................................. 94
Figure 28. VID/FID Change Timing ............................................................................................... 95
Figure 29. C-State and VID/FID Change Flow Diagram ................................................................ 96
Figure 30. SB820M 23 mm x 23 mm 0.8 mm Pitch 605-FCBGA Package Outline ..................... 110
List of Figures
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Figure 31. RoHS/Lead-Free Solder (SAC305/405 Tin-Silver-Copper) Reflow Profile................ 114
Figure 32. Test Mode Capturing Sequence Timing ....................................................................... 116
Figure 33. A Generic XOR Chain.................................................................................................. 117
Figure 34. On-chip XOR Chain connectivity ................................................................................ 118
List of Figures
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List of Tables
Table 1. Pin Type Codes .................................................................................................................. 19
Table 2. Acronyms and Abbreviations ............................................................................................ 20
Table 3. EHCI Support for Power Management States ................................................................... 24
Table 4. EHCI Power State Summary ............................................................................................. 25
Table 5. SCI Event Sources and Mapping into ACPI EventStatus.................................................. 26
Table 6. LPC Cycle List and Data Direction ................................................................................... 30
Table 7. CPU Interface Pin Descriptions ......................................................................................... 39
Table 8. LPC Interface Pin Descriptions ......................................................................................... 40
Table 9. A-Link Express II Interface Pin Descriptions.................................................................... 40
Table 10. General Purpose PCI Express® Ports Interface Pin Descriptions .................................... 41
Table 11. PCI Interface (PCI Host Bus and Internal PCI/PCI Bridge) Pin Description .................. 41
Table 12. USB Interface Pin Descriptions ....................................................................................... 44
Table 13. Flash Interface Pin Descriptions ...................................................................................... 45
Table 14. Serial ATA Interface Pin Descriptions ............................................................................ 46
Table 15. HD Audio Interface Pin Descriptions .............................................................................. 47
Table 16. Real Time Clock Interface ............................................................................................... 48
Table 17. SPI ROM Interface Pin Descriptions ............................................................................... 48
Table 18. Power Management Interface Pin Descriptions............................................................... 49
Table 19. SMBus Interface Pin Descriptions ................................................................................... 52
Table 20. Reset/Clocks/ATE/JTAG Interface Pin Descriptions ...................................................... 53
Table 21. General Purpose I/O and General Event Pin Descriptions .............................................. 58
Table 22. Keyboard and PS/2 Controller Interface Pin Descriptions .............................................. 69
Table 23. RGMII/MII Pin Descriptions ........................................................................................... 70
Table 24. Gigabit Ethernet PHY Pin Descriptions .......................................................................... 70
Table 25. Infrared Interface Pin Descriptions .................................................................................. 71
Table 26. Power and Ground Pin Descriptions................................................................................ 72
Table 27. Integrated Resistors.......................................................................................................... 74
Table 28. Standard Straps ................................................................................................................ 75
Table 29. Debug Straps .................................................................................................................... 77
Table 30. Power Sequence Timing .................................................................................................. 81
List of Tables
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Table 31. Power Sequence SB PWRGOOD, NB_PWRGOOD, and System Clock Timing (For
Internal Clock Mode Only) ...................................................................................................... 82
Table 32. Power Sequence SB PWRGOOD, NB_PWRGD, and System Clock Timing (For
External Clock Mode Only) ..................................................................................................... 82
Table 33. Rom Reset Timing for Various Platform Configurations................................................ 86
Table 34. System Reset Timing ....................................................................................................... 87
Table 35. PCIe® Reset Timing ......................................................................................................... 88
Table 36. Timing Definitions and Descriptions............................................................................... 97
Table 37. C3 Enter (Shaded)/Exit .................................................................................................... 98
Table 38. C3 Stutter Enter (Shaded)/Exit ........................................................................................ 98
Table 39. LdtCmd Enter (Shaded)/Exit ........................................................................................... 98
Table 40. S1 Enter (Shaded)/Exit .................................................................................................... 99
Table 41. S3 Enter (Shaded)/Exit .................................................................................................... 99
Table 42. S4 Enter (Shaded)/Exit .................................................................................................... 99
Table 43. Registers for Programming Sx and Cx-State Timing .................................................... 100
Table 44. Recommend Values for Programming Sx and Cx-State Timing ................................... 100
Table 45. DC Characteristics of the GPIO pins. ............................................................................ 102
Table 46. DC Characteristics of the PCI Interface ........................................................................ 102
Table 47. DC Characteristics of the CPU Interface ....................................................................... 103
Table 48. DC Characteristics of RSMRST# .................................................................................. 103
Table 49. DC Characteristics of SBPWRGD ................................................................................ 103
Table 50. DC Characteristics of the LPC Interface ....................................................................... 104
Table 51. RTC Battery Current Consumption (Preliminary Estimates) ........................................ 104
Table 52. States of Power Rails during ACPI S1 to S5 States ...................................................... 105
Table 53. System Clock Input Source Descriptions ...................................................................... 106
Table 54. System Clock Input Frequency Specifications .............................................................. 106
Table 55. NB_DISP_CLKP/N AC Specifications: (Non-Spread Clock) ...................................... 107
Table 56. CPU_HT_CLKP/N AC Specifications .......................................................................... 107
Table 57. 14-MHz/25-MHz/48-MHz Auxiliary Clock AC Specifications: .................................. 108
Table 58. PCI Clock AC Specifications ........................................................................................ 108
Table 59. SB820M 23 mm x 23 mm 0.8 mm Pitch 605-FCBGA Physical Dimensions ............... 110
Table 60. SB820M Thermal Limits ............................................................................................... 111
Table 61. SB820M Thermal Design Power for Different Platform Configurations...................... 112
List of Tables
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Table 62. Recommended Board Solder Reflow Profile - RoHS/Lead-Free Solder ...................... 113
Table 63. Signals for the Test Controller of the SB820M ............................................................. 115
Table 64. Test Mode Signals ......................................................................................................... 115
Table 65. TEST0 Bit Sequence ...................................................................................................... 116
Table 66. Truth Table for an XOR Chain ...................................................................................... 117
Table 67. List of Pins on the SB820M XOR Chain and the Order of Connection ........................ 118
Table 68. Signals that are not part of the XOR chain .................................................................... 123
Table 69. Pin Listing by Interface.................................................................................................. 124
Table 70. Pin List by Signal Name ................................................................................................ 134
List of Tables
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AMD SB820M Southbridge Databook
Revision History
Date
Revision
Description
•
Dec 2010
2.10
•
•
Oct 2010
2.00
•
Update Section 5.1, “Power Sequence”: Added timing label T2B and
revised T3’s minimum value.
Added Section 5.3, “Power Button Timing.”
Updated Table 21, “General Purpose I/O and General Event Pin
Descriptions”: Updated voltage level for LPC_SMI#/GEVENT23#.
First release of the public version.
Revision History
11
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Chapter 1
AMD SB820M Southbridge Databook
Introduction
The AMD SB820M Southbridge integrates key I/O, communications, and audio features
required in a state-of-the-art PC into a single device. It is specifically designed to operate with
AMD’s integrated graphics processors (IGPs) and Northbridges (NBs) in mobile PCs.
1.1
Features of the SB820M Southbridge
Processor Interface
 Interrupt steering supported for plugn-play devices
 Supports AMD mobile processors
code-named “Champlain,” and
“Geneva.”
 Supports concurrent PCI operations
 BIOS/hardware support to hide PCI
device
A-Link Express II interface to
Northbridges
 Supports spread spectrum
 1-, 2-, or 4-lane A-Link Express II
interface
USB Controllers
 4 OHCI and 3 EHCI host controllers
to support 14 USB 2.0 ports and 2
dedicated USB 1.1 ports
 Automatic detection of lane
configuration on boot-up
 Supports transfer rate of up to
2.5 GT/s per lane.

Supports ACPI S1 ~ S5

Supports USB keyboard/mouse
functionality for legacy Operating
Systems

USB debug port

Supports individual port disable
capability
PCI Express® Controller
 Two-lane PCI Express® (PCIe®) 1.x
interface, supporting up to two
general purpose devices. Supported
configurations include:

1x2

2x1
SMBus Controller

Supports SMBALERT # signal
PCI Host Bus Controller
 Supports PCI bus at 33MHz
Interrupt Controller
 Supports PCI Rev. 2.3 specification
 Supports up to 4 bus master devices
 Supports IOAPIC/X-IO APIC mode
for 24 channels of interrupts
 Supports 8259 legacy mode for 15
interrupts
 Supports 40-bit addressing
Introduction
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AMD SB820M Southbridge Databook
 Supports programmable level/edge
triggering on each channels
 RAID 0 and RAID 1 support
 Supports serial interrupt on quiet and
continuous modes
 Device or Host Initiated Power
Management (DIPM /HIPM) support
 NCQ support
 Hot plug support
DMA Controller
 e-SATA support
 Two cascaded 8237 DMA
controllers
Notes:
 Supports LPC DMA

RAID is supported on all SIX SATA
ports.

Any of the six ports can be configured to
a lower transfer rate of 3 or 1.5 Gbit/s
for saving power.

Any of the six SATA ports can be used
as e-SATA ports to support Second and
First Generation devices. (Third
generation SATA devices are not
supported as per the SATA 3.0
Specification).
 Supports type F DMA
LPC host bus Controller
 Supports LPC-based super I/O and
flash devices
 Supports two master/DMA devices
 Supports TPM version 1.1/1.2
devices for enhanced security
 Supports SPI devices
 Supports a maximum SPI ROM size
of 16MB
High Definition Audio
SATA Controller
 Supports six Third generation SATA
ports (backward compatible with
Second and First generation devices)
 Complies with SATA 2.6
specification
 Four independent output streams
(DMA)
 Four independent input streams
(DMA)
 Multiple channels of audio output
per stream
 Supports up to 4 codecs
 Supports two modes of operation:
 Up to 192kHz sample rate and 32-bit
audio

IDE emulation mode
 64-bit addressing capability for
DMA bus master and MSI

AHCI mode (compliant with
AHCI specification revision 1.2)
 Unified Audio Architecture (UAA)
compatible
 HD Audio registers can be located
anywhere in the 64-bit address space
Introduction
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AMD SB820M Southbridge Databook
 Supports 3.3V/1.5V dual-voltage
interface for power saving
Timers
 8254-compatible timer
 Watchdog timer
Real Time Clock (RTC)
 256-byte battery-backed CMOS
RAM
 Hardware supported century rollover
Power Management
Supports CPU C1e, C2, C3, C3
pop-up, C4, and C5 states

Supports system S0, S1, S3, S4,
and S5 states
Any GEVENT pin

Any GPM pin

USB

SMI event

Consumer IR
CPU SMM support, generating SMI
message upon power management
events

CLKRUN# support for PCI power
management

Provides clock generator and CPU
STPCLK# control

ALPM (HIPM) on SATA

DIPM on SATA

Two transmitters

IR receiver and wideband
learning receiver
Integrated Clock Function
 Wakeup events for S1, S3, S4, and
S5 generated by:

Internal RTC wakeup
 Media center infrared with wake
from all states
 RTC battery monitoring feature


Consumer IR
 Hardware supported day-light saving
feature
 ACPI specification 3.0 compliant
power management schemes
Power Button

 Microsoft® High Precision Event
Timer (HPET)
 ACPI power management timer

Introduction
 Provides two auxiliary clocks, which
can be configured to 25MHz,
14.318MHz, or 48MHz
 Provides system clocks for CPU and
NB HT link
 Provides PCIe® clocks for A-Link
Express II, graphics ( integrated or
external) and up to nine GPP ports
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1.2
AMD SB820M Southbridge Databook
Part Numbers and Brandings
Note 1
SB820M A12
YYWW ENG
MADE IN TAIWAN
WXXXXX.VV
218-0697014
Note 2
Note 3
Note 4
Note 5
Note 6
(a)
Note 1
SOUTHBRIDGE
YYWW
MADE IN ZZZZZZ
WXXXXX
218-0697014
Note 2
Note 3
Note 4
Note 5
Note 6
(b)
Introduction
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AMD SB820M Southbridge Databook
Note 1
SOUTHBRIDGE
YYWW
MADE IN ZZZZZZ
WXXXXX
218-0697020
Note 2
Note 3
Note 4
Note 5
Note 6
(c)
Note: Brandings can be in laser, ink, or
mixed laser-and-ink marking.
See Notes below.
Figure 1: SB820M Branding Diagrams for (a) Engineer Sample, (b) Production ASIC A12,
(c) Production ASIC A13
Note 1: Marketing Logo
Note 2: Product Name
Note 3: Date Code (YYWW)
This is the date code where YY-assembly start year, WW-assembly start week.
Note 4: Country of Origin (ZZZZZZ).
COO  Country of origin (Assembly site )
Note 5: Wafer foundry lot number (WXXXXX) (Wafer ID (VV))
Note 6: AMD PART NUMBER (See Table 2 Below)
Introduction
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AMD SB820M Southbridge Databook
Table 2: SB800-Series Southbridges Part Numbers
ASIC
ASIC
Revision
AMD Part Number
A12
218-0697012
A13
218-0697018
A12
218-0697014
A13
218-0697020
A12
218-0697010
A13
218-0697016
SB810
SB820M
SB850
Introduction
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1.3
AMD SB820M Southbridge Databook
SB820M Southbridge Block Diagram
Figure 2 is a block diagram showing the internal PCI devices and major blocks of the SB820M
Southbridge.
A-Link Express II / III **
AB
14 USB2.0 + 2 USB1.1
PORTS
B-Link
A-Link
PORT 1
PORT 0
USB:OHCI(x4)
PCIe®
(GEN 1 / 2 **)
Root Port (x2)
B-LINK
2 GPP ports
USB:EHCI(x3)
Debug port
6 PORTS(GEN-III)
To Ethernet
PHY
GbE MAC§
SATA
Controller
IDE
Controller
FC
FC *
A-LINK
HD Audio
PCI Bridge
SMBUS /ACPI
LPC
4 PCI slots
LPC bus
SPI bus
RTC
X1/X2
EC_INT
BUS Controler
SIRQ
SERIRQ#
INTR
IGNNE#,
FERRB#,
INT# H:A
ROM
BM
Core clks
FC clks
System
Clock Gen
Usb clk
Sata clk
GPIO
E-fuse
SMI
Notes:
* Flash controller function is not
supported on SB8xx platforms.
** A-Link Express III and PCIe®
Gen 2 speeds are only supported
on the SB810 and SB850.
§
GbE MAC function is not
supported on SB820M platforms.
XBUS
25Mhz X1/X2
CPU CLK P/N
NB DISP CLK P/N
EXT GFX CLK P/N
GPP CLK P/N
USB CLK
SIO CLK
APIC/ PIC
INTERRUPT
controller
Microcontroller
PICD[0]
RTC_IRQ#,
PIDE_INTRQ,
USB_IRQ#,
SATA_IRQ#,
AZ_IRQ#
ACPI / HW
Monitor
SMBUS
PM
8250 TIMER
SPEAKER
PWRGOOD
GEVENT, SLPBUTTON
TEMPDEAD, TEMPCAUT,
SHUTDOWN, SLP#,
CPUSTP#, PCISTP#,
STPCLK#, SMI#, SMIACT#
Figure 2. Block Diagram Showing the Internal PCI Devices and Major Function Blocks
Introduction
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1.4
AMD SB820M Southbridge Databook
Conventions and Notations
The following conventions are used throughout this manual.
1.4.1
Pin Names
Pins are identified by their pin names or ball references. All active-low signals are identified by
the suffix ‘#’ in their names (e.g., GNT0#).
1.4.2
Pin Types
The pins are assigned different codes according to their operational characteristics. These codes
are listed in Table 1.
Table 1. Pin Type Codes
Code
Pin Type
I
Digital Input
O
Digital Output
OD
Open Drain
I/O
Bi-Directional Digital Input or Output
I/OD
M
Digital Input or Open Drain
Multifunctional
PWR
Power
GND
Ground
A-O
Analog Output
A-I
Analog Input
A-I/O
Analog Bi-Directional Input/Output
A-PWR
Analog Power
A-GND
Analog Ground
Other
1.4.3
Pin types not included in any of the categories above
Numeric Representation
Hexadecimal numbers are appended with “h” whenever there is a risk of ambiguity.
Introduction
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AMD SB820M Southbridge Databook
Other numbers are in decimal.
Pins of identical functions but different running integers (e.g., “LAD3,” “LAD2,”
“LAD3”) are referred to collectively by specifying their integers in square brackets and
with colons (i.e., “LAD[3:0]”). A similar short-hand notation is used to indicate bit
occupation in a register. For example, Command[15:10] refers to the bit positions 10
through 15 of the Command register.
1.4.4
Register Field
A field of a register is referred to by the format of [Register Name].[Register Field]. For
example, “Commad.Memory Space” is the “Memory Space” field of the register
“Command.”
1.4.5
Acronyms and Abbreviations
The following is a list of the acronyms and abbreviations used in this manual.
Table 2. Acronyms and Abbreviations
Acronym
Full Expression
ACPI
Advanced Configuration and Power Interface
AHCI
Advanced Host Controller Interface
BGA
Ball Grid Array
BIOS
Basic Input Output System. Initialization code stored in a ROM or Flash RAM
used to start up a system or expansion card.
DAC
Digital to Analog Converter
DIPM
Device Initiated Interface Power Management
DMA
Direct Memory Access
EHCI
Enhanced Host Controller Interface
EPROM
Erasable Programmable Read Only Memory
GbE
Gigabit Ethernet
GND
Ground
GPIO
General Purpose Input/Output
GPM
General Power Management
HD
High Definition Audio
HIPM
Host Initiated Interface Power Management
HPET
High Precision Event Timer
Introduction
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Acronym
AMD SB820M Southbridge Databook
Full Expression
I2 C
Inter-Integrated Circuit
IDE
Integrated Drive Electronics
IR
ISA
JTAG
Infrared
Industry Standard Architecture
Joint Test Access Group. An IEEE standard.
LPC
Low Pin Count
MAC
Medium Access Controller
MII
Media Independent Interface
NCQ
Native Command Queuing
OHCI
Open Host Controller Interface
PCI
Peripheral Component Interface
PCIe
PCI Express®
PLL
Phase Locked Loop
POST
Power On Self Test
PD
Pull-down Resistor
PU
Pull-up Resistor
RAID
Redundant Array of Inexpensive Disks
RGMII
Reduced Gigabit Media Independent Interface
RTC
Real Time Clock
SATA
Serial ATA
SB-TSI
Sideband Temperature Sensor Interface
SCI
SMBus
System Controller Interrupt
System Management Bus
SMI
System Management Interrupt
SPI
Serial Peripheral Interface
TPM
Trusted Platform Module
USB
Universal Serial Bus
Introduction
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Chapter 2
AMD SB820M Southbridge Databook
Functional Description
2.1 EHCI USB 2.0 and OHCI USB 1.1 Controllers
Figure 3 is an internal block diagram for the SB’s USB controller.
Functional Description
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AMD SB820M Southbridge Databook
A-Link Express
NB
A-Link Express Interface
A-Link
A-Link (PCI BUS 0)
B-Link
OHCI ARBITOR
EHCI B-Link
EHCI B-Link
EHCI B-Link
OHCI BLink
PCI M/S
ACPI
controller
PM_event
slv
OHCI
Device 20
Function 5
Device ID
4399h
Vendor ID
1002h
slv
slv
slv
OHCI0
Device 18
Function 0
Device ID
4397h
Vendor ID
1002h
slv
OHCI0
Device 19
Function 0
EHCI
Device 18
Function 2
EHCI
Device 19
Function 2
Device ID
4397h
Vendor ID
1002h
Device ID
4396h
Vendor ID
1002h
Device ID
4396h
Vendor ID
1002h
slv
OHCI0
Device 22
Function 0
EHCI
Device 22
Function 2
Device ID
4397h
Vendor ID
1002h
Device ID
4396h
Vendor ID
1002h
INTB
INTA
INTB
INTA
INTB
INTA
INTC
ROOT HUB
slv
ROOT HUB
ROOT HUB
PHY
FS/LS
port0
FS/LS
port1
Port0
Port1
Port2
Port3 Port4
Port5
Port6
Port7
Port8 Port9
Port10
Controller
OHCI0 (dev-18, fun-0)
EHCI (dev-18, fun-2)
OHCI0 (dev-19, fun-0)
EHCI (dev-19, fun-2)
OHCI0 (dev-22, fun-0)
EHCI (dev-22, fun-2)
Port11 Port12
Port13
Ports mapping
Port 0 - 4
Port 0 - 4
Port 5 - 9
Port 5 - 9
Port 10 - 13
Port 10 - 13
Figure 3. USB Controllers Block Diagram
Functional Description
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AMD SB820M Southbridge Databook
2.1.1 USB Power Management
An advanced power management capability interface compliant with PCI Bus Power
Management Interface Specification Revision 1.1 is incorporated into the EHCI. This interface
allows the EHCI to be placed in various power management states, offering a variety of power
savings for a host system.
Table 3 highlights the EHCI support for power management states and features supported for
each of the power management states. An EHCI implementation may internally gate-off USB
clocks and suspend the USB transceivers (low power consumption mode) to provide these power
savings.
Table 3. EHCI Support for Power Management States
PCI Power
Management
State
State Required/
Optional in
Specification
D0
Required
Supported.
Fully awake backward compatible state. All logic in full
power mode.
D1
Optional
Not supported.
USB Sleep state with EHCI bus master capabilities
disabled. All USB ports in suspended state. All logic in
low latency power savings mode because of low latency
returning to D0 state.
D2
Optional
Not supported.
USB Sleep state with EHCI bus master capabilities
disabled. All USB ports in suspended state.
D3hot
Required
Supported.
Deep USB Sleep state with EHCI bus master capabilities
disabled. All USB ports in suspended state.
D3cold
Required
Supported.
Fully asleep backward compatible state. All downstream
devices are either suspended or disconnected based on the
implementation’s capability to supply downstream port
power within the power budget.
Comments
The functional and wake-up characteristics for the EHCI power states are summarized in
Table 4.
Functional Description
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AMD SB820M Southbridge Databook
Table 4. EHCI Power State Summary
Power State
Functional Characteristics
Wake-up Characteristics*
D0
•
Fully functional EHCI device
state
Unmasked interrupts are fully
functional
•
•
•
Resume detected on suspended port
Connect or Disconnect detected on port
Over Current detected on port
EHCI preserves PCI
configuration
EHCI preserves USB
configuration
Hardware masks functional
interrupts
All ports are disabled or
suspended
•
•
•
Resume detected on suspended port
Connect or Disconnect detected on port
Over Current detected on port
EHCI shall preserve PCI
configuration
EHCI shall preserve USB
configuration
Hardware masks functional
interrupts
All ports are disabled or
suspended
•
•
•
Resume detected on suspended port
Connect or Disconnect detected on port
Over Current detected on port
EHCI shall preserve PCI
configuration
EHCI shall preserve USB
configuration
Hardware masks functional
interrupts
All ports are disabled or
suspended
•
•
•
Resume detected on suspended port
Connect or Disconnect detected on port
Over Current detected on port
PME Context in PCI
Configuration space is
preserved
Wake Context in EHCI
Memory
Space is preserved
All ports are disabled or
suspended
•
•
•
Resume detected on suspended port
Connect or Disconnect detected on port
Over Current detected on port
•
D1
•
•
•
•
D2
•
•
•
•
D3hot
•
•
•
•
D3cold
•
•
•
•
* Note: Associated enables must be set.
Functional Description
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AMD SB820M Southbridge Databook
2.2 SMI/SCI Generation
Certain system events are routable between SMI or SCI. When an event is routed to SMI, an
SMI assertion message will be sent by the SB to the processor and it will enter SMM space. The
SMI status remains active until the EOS bit is set. When the EOS is set, an SMI de-assertion
message will be sent to the processor. If the event is routed to SCI, BIOS can then route it to any
of the legacy interrupts (except IRQ8) or INT21 in the case of IOAPIC.
2.2.1
Event Sources for SCI
There are 64 event sources below, which can be mapped into 32 event resources of ACPI
EventStatus. The SCI event mapping are controlled through the SciMap registers in SMI_reg
space. And the SCI Event enable/status are accessed through the EventEnable/EventStatus
registers in SMI_reg space. Refer to AMD SB800-Series Southbridges Register Reference Guide
(PID# 45482) for more details.
Table 5. SCI Event Sources and Mapping into ACPI EventStatus
Event
Number
Event Source
Active Level
0 ~ 23
Gevent0 ~ 23
high/low
24
PME from USB device 18
high
25
PME from USB device 19
high
26
PME from USB device 20
high
27
PME from USB device 22
high
28
PME from GPP device 21, function 0
high
29
PME from GPP device 21, function 1
high
30
PME from GPP device 21, function 2
high
31
PME from GPP device 21, function 3
high
32
Hotplug event from GPP device 21, function 0
high
33
Hotplug event from GPP device 21, function 1
high
34
Hotplug event from GPP device 21, function 2
high
35
Hotplug event from GPP device 21, function 3
high
36
PME from HD Audio device
high
37
SATA Gevent 0
high
38
SATA Gevent 1
high
39
PME from Gec
high
40
EC Gevent
high
41
Reserved
high
Functional Description
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AMD SB820M Southbridge Databook
Event
Number
Event Source
Active Level
42
PME from CIR
high
43
Wake# pin
high
44
FanThermal Gevent
high
45
ASF Master Interrupt event
high
46
ASF Slave interrupt event
high
47
SMBUS0 interrupt
high
48
TWARN event
high
49
Traffic Monitor Gevent
high
50~ 63
Reserved
high
2.2.2
SMI Events
SB820M supports up to 160 sources to generate SMI. The SMI control/status are accessed
through the registers defined in the SMI_Reg space. Refer to AMD SB800-Series Southbridges
Register Reference Guide (PID# 45482) for more details.
2.2.3
SMI/SCI Work Flow
Figure 4 shows how the SMI/SCI logic works (SmiSciEn bit set to 1)
Functional Description
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AMD SB820M Southbridge Databook
One of the 50
Event Sources
Event Triggered?
(SciTrig/edge
triggered)
No
Yes
SmiSciStatus is set
SMI is generated to host
(APU)
BIOS SMI service routine
acknowledges it by writing
1 to SmiSciStatus to clear
it
ACPI Event trigger logic
sees falling edge of
SmiSciStatus
ACPI EventStatus is set
and SCI is generated if
EventEnable is set
Figure 4. SMI/SCI Logic of the SB820M
Functional Description
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2.3 LPC ISA Bridge
2.3.1 LPC Interface Overview
The Low Pin Count (LPC) bus interface is a cost-efficient, low-speed interface designed to
support low-speed legacy (ISA, X-bus) devices. The LPC interface essentially eliminates the
need of ISA and X-bus in the system. A typical setup of the system with LPC interface is shown
in Figure 5. Here the ISA bus is internal to SB and is used for connecting to the legacy Direct
Memory Access (DMA) logic. The LPC host controller is typically integrated into the
Southbridge. It connects to the internal A-Link bus on one side and the LPC and Serial
Peripheral Interface (SPI) buses on the other side.
A-Link Bus
LPC Bridge
SPI Bridge
LPC Device
SPI Device
Figure 5. SB820M LPC Bus System
Examples of LPC devices include Super I/O (disk controller, keyboard controller), BIOS RAM,
audio, Trusted Platform Module (TPM), and system management controller. A BIOS ROM can
also be populated on the SPI interface. The SB820M Southbridge can support an LPC or SPI
type BIOS ROM. The ROM selection is determined by two strap pins (refer to Table 28.
Standard Straps ) during RSMRST# assertion. In addition to the straps, software can change the
ROM selection through programming in the PMIO registers.
The ISA interface is only used for legacy DMA operation. LPC host controller has the A-Link
bus on one side and the LPC bus on the other. Some LPC signals are used for power
management in mobile systems and are optional. A more detailed description of each signal is
given later.
The host controller supports memory and I/O read/write, DMA read/write, and bus master
memory I/O read/write. It supports up to two bus masters and seven DMA channels. A bus
Functional Description
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AMD SB820M Southbridge Databook
master or DMA agent uses the LDRQ pin to assert bus master or DMA requests. The host
controller uses LFRAME# to indicate the start or termination of a cycle. Table 6 shows a list of
cycles supported by the host controller, initiator, data flow direction, and their PCI counterparts.
Table 6. LPC Cycle List and Data Direction
Cycle
Size (bytes)
Initiator
Data
Direction
PCI counterpart
Memory
read
1
Host
P-2-Host
MemRead to LPC range
Memory
write
1
Host
Host-2-P
MemWrit to LPC range
I/O read
1
Host
P-2-Host
IORead to LPC range
I/O write
1
Host
Host-2-P
IOWrit to LPC range
DMA read
1, 2, 4
Peripheral
Host-2-P
DMA control setup; DMA data fetch
DMA write
1, 2, 4
Peripheral
P-2-Host
DMA control setup; DMA data store
BM
Memory
read
1, 2, 4
Peripheral
Host-2-P
DMA control setup; DMA data fetch
BM
Memory
write
1, 2, 4
Peripheral
P-2-Host
DMA control setup; DMA data store
BM I/O read
1, 2, 4
Peripheral
Host-2-P
DMA control setup; I/O data fetch
BM I/O
write
1, 2, 4
Peripheral
P-2-Host
DMA control setup; I/O data store
The host controller has a SERIRQ (Serial IRQ) pin, which is used by peripherals that require
interrupt support. All legacy interrupts are serialized on this pin, decoded by the host controller,
and sent to the interrupt controller for processing. Refer to the Serial IRQ Specification, Version
5.4, for detailed description of the serial IRQ protocol.
Functional Description
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AMD SB820M Southbridge Databook
2.3.2 LPC Module Block Diagram
PCI Interface
PCI Decode State
Machine
Configuration
Register Cntrl
32-bit DMA Buffer
Misc Module
Master Data Buffer
ISA Interface
internal
LDRQ Handler
Protocol State
Machine
LPC Interface
Figure 6. Block Diagram of LPC Module
2.4 Real Time Clock
The Real Time Clock (RTC) updates the computer’s time and generates interrupts for periodic
events and pre-set alarm. The RTC also makes hardware leap year corrections. The SB’s RTC
includes a 256-byte CMOS RAM, which is used to store the configuration of a computer such as
the number and type of disk drive, graphics adapter, base memory, checksum value, etc.
2.4.1 Functional Blocks of RTC
The internal RTC is made of two parts—one part is an analog circuit, powered by a battery
VBAT, and the other is a digital circuit, powered by a main power VDD. Figure 7 shows the
block diagram of the internal RTC. The SB has added hardware-based daylight saving feature
and makes adjustments (spring forward or fall back) at the designated dates/times. Both the date
Functional Description
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AMD SB820M Southbridge Databook
and hour for the daylight and standard time are fully programmable, allowing for different
daylight saving dates and hours for different parts of the world.
Analog Portion
Powered by
Battery (VBAT)
29- bit
Ripple
Counter
256 Bytes RAM
Alarm
1Hz
15- bit
Ripple
Counter
32. 768KHz
Digital Portion
RAM
Controller
Registers
Powered by Main
Power (VDD)
Frequency
Divider
Time
Update
Decode and Interface
To PCI Interface
Figure 7. Block Diagram of Internal RTC
2.5 Serial ATA Controller
The integrated Serial ATA controller processes host commands and transfers data between the
host and Serial ATA devices. It supports six independent Serial ATA channels. Each channel has
its own Serial ATA bus and supports one Serial ATA device. With respect to the transfer rate,
the integrated SATA controller supports First generation (1.5 Gbit/s), Second generation (3.0
Gbit/s), and Third generation (6.0 Gbit/s) SATA ports. Figure 8 is a diagram for the SATA
block.
The SATA controller can operate in three modes:
•
•
All six channels are configured as SATA AHCI mode.
All six channels are configured as IDE mode. In this configuration, the SATA controller is
configured into two IDE controllers, with the programming interface of channel 0 to 3 under
the first IDE controller, and that of channel 4 and 5 under the second IDE controller.
Functional Description
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•
AMD SB820M Southbridge Databook
Four channels (channel 0 to 3) are configured as SATA AHCI and two channels (channel 4
and 5) are configured as IDE mode. In this configuration, the programming interface of
channel 4 and 5 are under the IDE controller.
AHCI Global Control Register & Port Mapping
Port0
Serdes
Interface
Host
Transport
Link
Blink clock
data to be
written
512-Byte Reception
FIFO
Clock
512-Byte Transmission
FIFO
Asicclk0
Port0 link clock
PHY
64-bit PCI/B-Link Interface
data to
be read
Port1
Asicclk1
Port2
Asicclk2
Port3
Asicclk3
Port4
Asicclk4
Port5
Asicclk5
Figure 8. Block Diagram for the SATA Module
2.6 PCI Bridge
The PCI Bridge supports up to four PCI slots. The PCI bridge runs at 33 MHz and can support
CLKRUN# function with individual clock override (option for not stopping specific PCICLK).
In addition, it has the capability to hide individual PCI devices.
The SB has a strapping option that allows loading of the boot codes from the PCI bus on the very
first boot (first boot after RSMRST#). Subsequent boots will revert back to the ROM selection
determined by the ROM straps or PMIO programming. This allows system manufacturers to
populate the motherboard with a blank flash device (for BIOS) and use this option to program it.
This is particularly useful for systems built without a socket for the BIOS ROM.
Functional Description
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2.7
AMD SB820M Southbridge Databook
High Definition Audio
The High Definition (HD) Audio Controller communicates with the external HD Audio codec(s)
over the HD Audio Link. The SB820M HD Audio Controller consists of four independent output
DMA engines and four independent input DMA engines that are used to move data between
system memory and the external codec(s). The controller can support up to four audio or modem
codec in any combinations.
2.7.1 HD Audio Codec Connections
Figure 9. shows the HD Audio interface connections to the HD Audio codecs. The SB can
support up to four HD Audio codecs. Each codec will have its own AZ_SDIN (data input) for the
HD Audio interface. Figure 9. shows the connection of a two-codec configuration.
HD CODEC
1
HD CODEC
2
SB
HD Audio Engine
HD Audio SDIN3
HD Audio SDOUT
HDAudio SYNC/BitCLK/RST#
SDIN0
Figure 9. HD Audio Codec Connections
2.8
Clock Generation
The SB820M has an integrated system clock generator that can be used to generate the required
system clocks, thus eliminating the need for an external clock generator. However, it does
support a mode of operation that allows an external clock generator to be used in the system. The
clock generator mode is selected by a power-on configuration strap pin (see Table 28). A
simplified block diagram of the clock logic is shown in Figure 10.
Functional Description
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AMD SB820M Southbridge Databook
CPU
SIO
System
clock gen
48/25/14Mhz
NB_DSPLL_CLK
100MHz
NB
PCIe_NB(diff)
100MHz
SLT_GFX_CLK(diff)
100MHz
Gfx
NB_HT_CLK(diff)
100MHz
CPU_HT_CLK(diff)
200MHz
GPP 1
GPP 2
SB8xx
PCIe_GPP1(diff)
PCIe_GPP2(diff)
14Mhz
Any device
on system or
NB
PCIe_GPP9(diff)
Device_CLK
(48/25/14MHz)
GPP 9
GPP 10
25Mhz XTAL
Pci Clk (x7)
SB8xx System Level Clocks Distribution Diagram
Figure 10. System Clock Generation
If the SB820M is in external clock mode, the clock sources it requires are a 25MHz crystal as
internal PLL clock source, a 32-KHz crystal for the RTC, and a 100MHz differential clock pair
for the PCIe reference clocks. In addition to the PCIe clocks, the SB820M also uses the 100
MHz clock to generate various internal clocks, including the PCI 33-MHz clocks.
If the SB820M is set to integrated clock mode, only a 25MHz crystal for master reference and a
32-KHz crystal for the RTC are required. The SB820M will then generate all of the system
clocks needed, which include the CPU, NB, and graphics reference clocks, the 25MHz clock for
SATA, the 48MHz clocks for USB, and so on. Overclocking is not supported in the internal
clock mode.
The requirements for clock sources for both the internal and external modes are detailed in Table
53, “System Clock Input Source Descriptions.”
Functional Description
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AMD SB820M Southbridge Databook
2.9 Power Management/ACPI
The SB820M power management/ACPI logic is identical to that of the SB700. It supports
C3/C1e and stutter mode and S states.
Functional Description
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AMD SB820M Southbridge Databook
Chapter 3
A
B
1
2
xxxxxxxxxxxxxxx
VSS_3
VDDBT_RTC_ INTRUDER_AL
G
ERT#
C
32K_X1
D
USB_OC6#/IR
_TX1/GEVENT
6#
E
F
G
H
3
Ballout Assignment
4
TEST0
32K_X2
TEST1/TMS
RSMRST#
VIN3/GPIO178
SLP_S5#
ROM_RST#/G
PIO161
VSS_40
GEVENT5#
BLINK/USB_O
DDR3_RST#/G
PWR_GOOD
C7#/GEVENT1
EVENT7#
8#
J
K
RI#/GEVENT2 LPC_PME#/GE GBE_STAT0/G SPI_CLK/GPIO
2#
VENT3#
EVENT11#
162
M
6
7
8
9
10
11
12
A_RST#
VSS_41
AZ_SDIN0/GPI
O167
AZ_SDIN2/GPI AZ_SDIN1/GPI
O169
O168
N
AZ_SDOUT
AZ_SYNC
P
PCIE_RST#
AZ_RST#
VSSIO_USB_1
4
TEMP_COMM
VDDAN_11_U
SB_S_1
GBE_COL
GBE_RXD1
U
GBE_RXD3
GBE_RXD0
V
VDDRF_GBE_
S
PCIRST#
W
PCICLK1/GPO
36
PCICLK0
Y
PCICLK4/14M_
OSC/GPO39
NC2
AA
AD0/GPIO0
VDDIO_33_PC
IGP_6
AB
AD3/GPIO3
AC
AD12/GPIO12
AD
14
15
USB_HSD4N
USB_HSD4P
USB_HSD8N
VSS_51
AZ_BITCLK
AZ_SDIN3/GPI
O170
GBE_LED2/GE
SUS_STAT#
VENT10#
VSS_42
WAKE#/GEVE
NT8#
VSS_46
THRMTRIP#/S
SPI_DI/GPIO1
MBALERT#/G
64
EVENT2#
VSS_21
GBE_MDIO
GBE_TXD3
GBE_MDCK
VSSIO_USB_1
USB_HSD7P
5
VSS_43
USB_FSD0P/G
PIO185
USB_FSD0N
VDDCR_11_G
BE_S_1
VSS_52
GBE_PHY_PD GBE_TXCLK
USB_HSD10N
SPI_CS1#/GPI VDDIO_33_S_
VSSIO_USB_2
VSSIO_USB_3
O165
4
4
VSSIO_USB_2
5
VDDCR_11_G VDDIO_33_S_
BE_S_2
5
VDDIO_GBE_ GBE_TXCTL/T
GBE_PHY_RS VDDIO_33_GB
VDDIO_AZ_S
S_1
XEN
T#
E_S
VSS_49
GBE_CRS
GBE_RXD2
GBE_RXCTL/R VDDIO_33_S_
XDV
7
VSS_19
VSS_18
VSS_44
GBE_TXD0
VDDIO_GBE_
S_2
GBE_TXD1
VDDIO_33_S_
GBE_RXCLK
8
GBE_TXD2
GBE_RXERR
VDDIO_33_PC GBE_PHY_INT
IGP_2
R
VSS_28
PCICLK2/GPO PCICLK3/GPO FANOUT0/GPI FANOUT1/GPI FANIN0/GPIO5 FANIN2/GPIO5
37
38
O52
O53
6
8
EFUSE
AD1/GPIO1
AD4/GPIO4
AD8/GPIO8
VDDIO_33_PC
IGP_9
AD5/GPIO5
VDDIO_33_PC
IGP_7
AD7/GPIO7
AD6/GPIO6
VSS_26
AD9/GPIO9
AD10/GPIO10 AD11/GPIO11
PAR
AD15/GPIO15
AD2/GPIO2
AD13/GPIO13 AD14/GPIO14
VSS_25
CBE1#
SERR#
VDDIO_33_PC
IGP_4
PERR#
STOP#
AD26/GPIO26
AE
AD17/GPIO17 AD16/GPIO16 AD19/GPIO19
AF
AD20/GPIO20 AD22/GPIO22 AD28/GPIO28 AD27/GPIO27
VSS_24
CBE0#
LOCK#
CBE2#
TRDY#
FRAME#
AH
AJ
VSSIO_SATA_
INTH#/GPIO35 GNT1#/GPO44 INTE#/GPIO32
SATA_RX0N
16
1
VSS_1
IRDY#
2
3
4
INTF#/GPIO33
5
6
VSS_48
VSS_29
VSS_30
FANOUT2/GPI
O54
VSS_35
VDDIO_33_PC
IGP_10
CBE3#
7
VSS_10
VDDCR_11_2
VSS_14
VDDCR_11_4
VSS_15
VDDCR_11_6
VDDCR_11_8
VSS_37
VSS_36
VSSIO_SATA_
1
VSS_38
VSS_39
SATA_CALRN
CLKRUN#
GNT3#/CLK_R
EQ7#/GPIO46
SATA_CALRP
VSS_27
AD25/GPIO25
REQ3#/CLK_R
EQ5#/GPIO42
VSSIO_SATA_
4
AD24/GPIO24
SATA_ACT#/G
PIO67
GNT0#
VDDPL_33_SA
TA
REQ0#
VSSIO_SATA_
5
VSSIO_SATA_
6
AD23/GPIO23
SATA_TX2N
VSSIO_SATA_
SATA_RX3P
9
SATA_RX1N
SATA_TX2P
SATA_RX3N
SATA_TX1P
VSSIO_SATA_
VSSIO_SATA_
SATA_RX2P
14
13
SATA_TX3P
SATA_TX0N
SATA_TX1N
VSSIO_SATA_
VSSIO_SATA_
SATA_RX2N
17
18
SATA_TX3N
9
10
VSSIO_SATA_
11
AD21/GPIO21 AD30/GPIO30
VDDIO_33_PC
REQ2#/CLK_R REQ1#/GPIO4
VSSIO_SATA_
AD29/GPIO29 AD31/GPIO31
GNT2#/GPO45
SATA_RX0P
IGP_1
EQ8#/GPIO41
0
12
INTG#/GPIO34
FANIN1/GPIO5
7
VDDIO_33_PC
VSSIO_SATA_
VSSIO_SATA_
AD18/GPIO18
SATA_RX1P
IGP_11
7
8
AG
VSS_9
VSS_12
DEVSEL#
VDDIO_33_PC
IGP_8
VDDCR_11_1
VSS_13
VSS_33
VSS_23
VSSIO_USB_1
9
VDDIO_33_S_ USB_FSD1P/G VSSIO_USB_2
USB_HSD10P
6
PIO186
2
VSS_50
VSS_22
USB_HSD7N
VSSIO_USB_1
USB_FSD1N
8
R
T
13
SPI_CS3#/GB USB_OC4#/IR
GBE_LED0/GP VDDAN_33_H GBE_LED1/GE
VSSIO_USB_1
VDDAN_11_U
RTCCLK
VSSAN_HWM
VSSIO_USB_5
VSSIO_USB_6 USB_HSD8P VSSIO_USB_7
E_STAT1/GEV _RX0/GEVENT
IO183
WM_S
VENT9#
7
SB_S_2
ENT21#
16#
USB_OC5#/IR
USB_OC3#/AC
IR_LED#/LLB#/ SPI_DO/GPIO
USB_OC1#/TD
VSS_4
VSS_7
USB_HSD12N USB_HSD11N
USB_HSD11P
_TX0/GEVENT
_PRES/TDO/G VSSIO_USB_9
GPIO184
163
I/GEVENT13#
17#
EVENT15#
USB_OC0#/TR
IR_RX1/GEVE SDA1/GPIO22
USB_OC2#/TC
VSSIO_USB_1
VSSIO_USB_1
VSSIO_USB_1
SLP_S3#
PWR_BTN#
SCL1/GPIO227
TEST2
USB_HSD12P
ST#/GEVENT1
NT20#
8
K/GEVENT14#
0
1
2
2#
SYS_RESET#/ PCI_PME#/GE
GEVENT19#
VENT4#
L
5
USBCLK/14M_
TEMPIN2/GPI TEMPIN1/GPI
VIN7/GBE_LE
VDDCR_11_U
VIN4/GPIO179
VSSIO_USB_1 25M_48M_OS
USB_HSD13N USB_HSD9P
O173
O172
D3/GPIO182
SB_S_1
C
TEMPIN3/TAL
TEMPIN0/GPI
VIN6/GBE_ST
VDDCR_11_U
VIN1/GPIO176 ERT#/GPIO17
VIN5/GPIO180
VSSIO_USB_4 VSSIO_USB_2
USB_HSD13P USB_HSD9N
O171
AT3/GPIO181
SB_S_2
4
VIN0/GPIO175 VIN2/GPIO177
SATA_TX0P
8
11
12
13
14
15
Figure 11: SB820M Ballout Assignment (Left)
Ballout Assignment
37
47283 2.10 Dec 2010
18
AMD SB820M Southbridge Databook
16
17
USB_HSD0P
USB_HSD1N
VDDAN_33_U VDDAN_33_U VDDAN_33_U VDDIO_33_S_ KSO_16/GPIO KSO_13/GPIO KSO_6/GPIO2 KSO_8/GPIO2 KSO_4/GPIO2 KSO_1/GPIO2
SB_S_1
SB_S_2
SB_S_3
1
225
222
15
17
13
10
19
USB_HSD0N
USB_HSD1P
VDDAN_33_U VDDAN_33_U VDDAN_33_U VDDIO_33_S_ KSO_17/GPIO KSO_12/GPIO KSO_10/GPIO KSO_7/GPIO2 SCL3_LV/GPI KSO_2/GPIO2 KSO_0/GPIO2
SB_S_4
SB_S_5
SB_S_6
3
226
221
219
16
O195
11
09
VDDAN_33_U
SB_S_7
USB_HSD5N
20
21
VDDAN_33_U
SB_S_8
22
KSO_15/GPIO
224
VDDAN_33_U VDDAN_33_U VDDAN_33_U VDDIO_33_S_ KSO_14/GPIO
USB_HSD5P VSSIO_USB_8
SB_S_9
SB_S_10
SB_S_11
2
223
USB_HSD3N
USB_HSD3P
VSSIO_USB_1
3
EC_PWM3/EC
_TIMER3/GPI
O200
SPI_CS2#/GB
E_STAT2/GPI
O166
ALLOW_LDTS
TP/DMA_ACTI
VE#
VDDAN_33_U
SB_S_12
VSSIO_USB_1 VDDPL_33_US
6
B_S
USB_HSD6P
USB_HSD6N
VSSIO_USB_2
0
USB_RCOMP
VSSIO_USB_2 VSSIO_USB_2
1
8
23
USB_HSD2P
VSSIO_USB_2
7
LDT_PG
25
KSO_11/GPIO
220
VSS_5
26
KSO_5/GPIO2
14
28
29
A
VSS_2
VSS_32
C
KSO_9/GPIO2
KSO_3/GPIO2 PS2KB_DAT/G KSI_5/GPIO20 KSI_4/GPIO20
SCL2/GPIO193
18
12
PIO189
6
5
D
KSI_0/GPIO20 KSI_1/GPIO20 VDDCR_11_S
1
2
_2
LDT_STP#
VSSIO_PCIEC
LK_14
PROCHOT#
LPCCLK0
LDT_RST#
LPCCLK1
LDRQ0#
VSSIO_PCIEC VDDAN_11_C
LK_27
LK_7
NC1
VSSIO_PCIEC
LK_15
LAD1
LAD0
VDDAN_11_C
LK_4
VSSIO_PCIEC VDDPL_11_SY
GPP_CLK4N
LK_26
S_S
GPP_CLK4P
14M_25M_48M
_OSC
VDDXL_33_S
VSS_16
PCIE_RCLKP/
VSSIO_PCIEC
VSSIO_PCIEC
VDDPL_33_SY VSSIO_PCIEC
GPP_CLK5N
VSSPL_SYS
NB_LNK_CLK
LK_4
LK_5
S
LK_3
P
VDDCR_11_3
25M_X1
GPP_CLK7P
PCIE_RCLKN/
VSSIO_PCIEC VSSIO_PCIEC VSSIO_PCIEC
VSSIO_PCIEC
NB_LNK_CLK
LK_2
LK_1
LK_6
LK_7
N
GPP_CLK5P
25M_X2
GPP_CLK7N
VSSIO_PCIEC
LK_8
GPP_CLK3P
VDDCR_11_7
VSS_17
VDDCR_11_9
VSS_34
VSSIO_PCIEC CPU_HT_CLK VDDAN_11_P SLT_GFX_CLK
LK_12
P
CIE_2
P
NC3
GPP_CLK3N
VSSIO_PCIEC VSSIO_PCIEC VDDAN_11_P
LK_24
LK_23
CIE_7
NC5
NC6
VDDIO_33_PC VSSIO_PCIEC
IGP_3
LK_22
NC4
GPP_RX0N
G
LAD3
LAD2
H
VDDAN_11_C LPC_SMI#/GE
LK_3
VENT23#
J
VDDAN_11_C VDDAN_11_C
LK_1
LK_2
K
GPP_CLK0N
GPP_CLK0P
L
GPP_CLK2N
GPP_CLK2P
M
GPP_CLK1N
GPP_CLK1P
N
GPP_CLK6N
GPP_CLK6P
SATA_X1
VDDAN_11_S
ATA_3
SATA_TX4P
VSSIO_SATA_
SATA_RX4N
19
16
17
V
FC_ADQ7/GPI
OD135
A_TX3P
VSSIO_PCIEC
LK_21
A_RX1N
A_RX1P
A_TX0P
FC_ADQ4/GPI
OD132
NC7
NC8
W
GPP_TX1N
GPP_TX1P
Y
GPP_TX0P
GPP_TX0N
AA
A_TX2N
A_TX2P
AB
A_TX1P
A_TX1N
AC
PCIE_CALRN
PCIE_CALRP
AD
VDDPL_33_PC FC_CE2#/GPI
IE
OD150
AE
FC_CE1#/GPI FC_OE#/GPIO FC_INT1/GPIO
OD149
D145
D144
AF
FC_FBCLKOU FC_AVD#/GPI
T
OD146
AG
NC10
VSSIO_PCIEC
LK_20
A_RX3P
A_RX0P
A_TX3N
A_TX0N
VDDIO_18_FC VSSIO_PCIEC
_2
LK_25
VSS_45
FC_FBCLKIN
FC_ADQ14/GP FC_WE#/GPIO
IOD142
D148
SATA_RX5N
VDDAN_11_S CLK_REQ2#/F FC_ADQ9/GPI FC_ADQ5/GPI FC_ADQ3/GPI FC_ADQ2/GPI FC_ADQ15/GP FC_INT2/GPIO
ATA_2
ANIN4/GPIO62
OD137
OD133
OD131
OD130
IOD143
D147
FC_CLK
SATA_TX5P
SATA_RX5P
SMARTVOLT2/
VDDAN_11_S
FC_ADQ6/GPI FC_ADQ10/GP FC_ADQ12/GP FC_ADQ13/GP FC_ADQ1/GPI FC_ADQ0/GPI
SHUTDOWN#/
ATA_1
OD134
IOD138
IOD140
IOD141
OD129
OD128
GPIO51
VSS_31
18
19
SATA_TX5N
20
21
22
23
24
25
T
VDDAN_11_P
CIE_8
A_RX2N
SATA_IS4#/FA
VDDAN_11_S
FC_ADQ8/GPI VDDIO_18_FC FC_ADQ11/GP VDDIO_18_FC
SPKR/GPIO66 NOUT3/GPIO5
ATA_4
OD136
_1
IOD139
_3
5
GPP_CLK8P
U
A_RX2P
VSSIO_SATA_
10
A_RX0N
GPP_RX1P
GPP_CLK8N
VDDAN_11_P VDDAN_11_P VDDAN_11_P VDDAN_11_P
CIE_3
CIE_4
CIE_5
CIE_6
A_RX3N
VDDAN_11_S SATA_IS5#/FA
ATA_5
NIN3/GPIO59
VSSIO_SATA_
SATA_RX4P
15
KBRST#/GEVE
SDA0/GPIO47
NT1#
GPP_RX1N
VDDAN_11_S
ATA_7
SATA_TX4N
P
NB_DISP_CLK NB_DISP_CLK
N
P
NC9
LDRQ1#/CLK_
CLK_REQG#/
VDDIO_33_PC
VSSIO_PCIEC
VSSIO_PCIEC
GPP_RX0P
REQ6#/GPIO4
GPIO65/OSCI
IGP_12
LK_16
LK_17
9
N
CLK_REQ1#/F
SMARTVOLT1/
SERIRQ/GPIO
VSSIO_PCIEC
ANOUT4/GPIO
SATA_IS2#/GP
48
LK_18
61
IO50
CLK_REQ0#/S
VDDIO_33_PC VDDIO_18_FC
ATA_IS3#/GPI NB_PWRGD
IGP_5
_4
O60
CLK_REQ4#/S
GA20IN/GEVE
VSSIO_PCIEC
VDDAN_11_S
SCL0/GPIO43
ATA_IS0#/GPI
NT0#
LK_19
ATA_6
O64
SATA_X2
NB_HT_CLKP NB_HT_CLKN
VDDAN_11_P
CIE_1
VDDCR_11_5
VSSIO_SATA_
3
F
FC_RST#/GPO
160
R
VSSIO_PCIEC CPU_HT_CLK VSSIO_PCIEC SLT_GFX_CLK VSSIO_PCIEC
LK_9
N
LK_10
N
LK_11
CLK_REQ3#/S
ATA_IS1#/GPI
O63
E
LFRAME#
VSS_11
VSSIO_SATA_
2
B
KSI_7/GPIO20 KSI_6/GPIO20
8
7
VSS_20
VSSXL
27
EC_PWM1/EC
PS2_DAT/SDA PS2_CLK/SCL
SDA3_LV/GPI PS2M_CLK/GP KSI_2/GPIO20 KSI_3/GPIO20
VSS_6
_TIMER1/GPI
4/GPIO187
4/GPIO188
O196
IO192
3
4
O198
EC_PWM2/EC
EC_PWM0/EC
SDA2/GPIO19
VDDCR_11_S
PS2KB_CLK/G PS2M_DAT/G
VSS_8
_TIMER2/GPI
_TIMER0/GPI
4
_1
PIO190
PIO191
O199
O197
VSSIO_USB_2 VDDAN_11_C VDDAN_11_C VDDAN_11_C VSSIO_PCIEC
USB_HSD2N
3
LK_6
LK_5
LK_8
LK_13
VSSIO_USB_2
6
24
26
27
28
VSS_47
AH
AJ
29
Figure 12: SB820M Ballout Assignment (Right)
Ballout Assignment
38
47283 2.10 Dec 2010
AMD SB820M Southbridge Databook
Chapter 4
Pin Descriptions
Note: For multi-functional pins, go to the relevant section for description of a specific function
(e.g., for USB_FSD1P/GPIO186, the USB_FSD1P function is described in Section 4.6, ”USB
Interface,” and the GPIO186 function is described in Section 4.15, “General Purpose I/O”).
4.1
CPU Interface Pin Descriptions
Table 7. CPU Interface Pin Descriptions
Pin name
Type
Voltage
Functional Description
ALLOW_LDTSTP/
DMA_ACTIVE#
In/
OD
VDDIO_33_S
(0.8V threshold)
See Table 18, “Table 18. Power Management
Interface Pin Descriptions.”
LDT_PG
OD
VDDIO_33_S
(0.8V threshold)
LDT Power Good
VDDIO_33_S
See Table 20, Reset/Clocks/ATE/JTAG Interface Pin
Descriptions.
LDT_RST#
OD
(0.8V threshold)
LDT_STP#
OD
VDDIO_33_S
(0.8V threshold)
Assertion of LDTSTOP# on the CPU causes it to
enter C3, or S1/S2/S3/S4/S5. Assertion takes place:
(a) for S1/S2/S3/S4/S5: after SUS_STAT# is asserted;
(b) for C3: after the STPGNT message is received by
the system.
Deassertion of LDTSTOP_L causes the CPU to return
to C0 or S0 state. Deassertion takes place following a
wake-up event:
(a) in S1: at an interval (programmed by an SB
register) after deassertion of CPU_STP#;
(b) in S3/S4/S5: after SB PWR_GOOD is asserted;
(c) in C3: at an interval (programmed by an SB
register)
Both the NB and SB can control the LDT_STP#
during C state.
PROCHOT#
I
VDDIO_33_S
(0.8V threshold)
Processor Hot: Similar to TALERT#. When it is
asserted, it can generate SCI or SMI to OS/BIOS
Pin Descriptions
39
47283 2.10 Dec 2010
4.2
AMD SB820M Southbridge Databook
LPC Interface Pin Descriptions
Table 8. LPC Interface Pin Descriptions
Pin Name
Type Voltage
Functional Description
GA20IN/GEVENT0#
I
3.3V
(5-V tolerance)
A20 Gate Input from SIO / General Event 0
KBRST#/
GEVENT1#
I
3.3V
(5-V tolerance)
Keyboard reset# / General Event 1
LAD[3:0]
I/O
VDDIO_33_S
Multiplexed Command / Address/Data [3:0]
LDRQ0#
I
VDDIO_33_S
Encoded DMA Bus Master Request 0
I/O
3.3V
(5-V tolerance)
Encoded DMA Bus Master Request 1 / Clock Request
6 / GPIO 49
LFRAME#
O
VDDIO_33_S
LPC Bus Frame.
Indicates start of a new cycle or termination of a broken
cycle.
LPCCLK0
O
VDDIO_33_S
33MHz LPCCLK for LPC device such as flash ROM
LPCCLK1
O
VDDIO_33_S
33MHz LPCCLK for LPC device such as SIO device
LPC_SMI#/
GEVNT23#
I
VDDIO_33_S
LPC SMI / General Event 23
I/O
3.3V
(5-V tolerance)
Serial IRQ / GPIO 48
LDRQ1#/
CLK_REQ6#/
GPIO49
SERIRQ/GPIO48
Note: LPCCLK0 can be assigned to any LPC device. This clock is active during S2 – S5 states.
LPCCLK1 and PCI Clock can be used for additional LPC devices that do not require clock in S2 –S5
states.
4.3
A-Link Express II Interface Pin Descriptions
Table 9. A-Link Express II Interface Pin Descriptions
Pin Name
Type
Voltage
Functional Description
A_TX[3:0]P
O
A-Link Express II Lane 3-0 Transmit Positive
A_TX[3:0]N
O
A_RX[3:0]P
I
A-Link Express II Lane 3-0 Receive Positive
A_RX[3:0]N
I
A-Link Express II Lane 3-0 Receive Negative
1.1V (Filtered)
A-Link Express II Lane 3-0 Transmit Negative
Pin Descriptions
40
47283 2.10 Dec 2010
Pin Name
AMD SB820M Southbridge Databook
Type
Voltage
Functional Description
PCIE_CALRP
I/O
Pad connection to an external resistor to VSS_PCIE on
board. For TX impedance calibration.
PCIE_CALRN
I/O
Pad connection to an external resistor to
VDDAN_11_PCIE on board. For RX impedance
calibration.
PCIE_RCLKP/
NB_LNK_CLKP
I/O
Internal clock mode: NB_LINK_CLKP. Positive
phase 100MHz reference clock output for A-Link
Express II
External clock mode: PCEI_RCLKP. Positive phase
100MHz reference clock input
PCIE_RCLKN/
NB_LNK_CLKN
I/O
Internal clock mode: NB_LINK_CLKN. Negative
phase 100MHz reference clock output for A-Link
Express II
External clock mode: PCEI_RCLKN. Negative phase
100MHz reference clock input
4.4 General Purpose PCI Express® Ports Interface
Table 10. General Purpose PCI Express® Ports Interface Pin Descriptions
Pin Name
Type
Voltage
Functional Description
GPP_TX[1:0]P
O
Transmit positive for general purpose PCIe® ports lane
1 and 0
GPP_TX[1:0]N
O
Transmit negative for general purpose PCIe ports lane
1 and 0
GPP_RX[1:0]P
I
GPP_RX[1:0]N
I
1.1V (Filtered)
Receive positive for general purpose PCIe ports lane
1and 0 Receive Positive
Receive negative for general purpose PCIe ports lane
1and 0 Receive Positive
4.5 PCI Interface (PCI Host Bus and Internal PCI/PCI
Bridge)
Table 11. PCI Interface (PCI Host Bus and Internal PCI/PCI Bridge) Pin Description
Pin Name
AD[31:0]/
GPIO[31:0]
Type Voltage
I/O
Functional Description
3.3V
(5-V tolerance)
PCI Bus Address/Data [31:0] / GPIO[31:0]
Pin Descriptions
41
47283 2.10 Dec 2010
Pin Name
AMD SB820M Southbridge Databook
Type Voltage
Functional Description
CBE[3:0]#
I/O
3.3V
(5-V tolerance)
Command/Byte Enable[3:0]
CLKRUN#
I/O
3.3V
(5-V tolerance)
Clock running is deasserted by the clock provider to
indicate the system is about to shut down the PCI
clock. When it is driven low by other agents, it means
the agent is requesting the clock provider not to
deactivate the clock.
DEVSEL#
I/O
3.3V
(5-V tolerance)
Device Select. Driven by target to indicate it has
decoded its address as the target of the current access.
FRAME#
I/O
3.3V
(5-V tolerance)
Cycle Frame. Driven by the current master to indicate
the beginning and duration of an access.
GNT0#
O
3.3V
(5-V tolerance)
PCI Bus Grant 0 from the SB. Indicates to the agent
that access to the bus has been granted.
GNT1#/GPO44
O
3.3V
(5-V tolerance)
PCI Bus Grant1/ GPO44
PCI Bus Grant 1 from the SB: indicates to the agent
that access to the bus has been granted. Pin muxed with
GPIO44
GNT2#/GPO45
O
3.3V
(5-V tolerance)
PCI Bus Grant2/ GPO45
PCI Bus Grant 2 from the SB: indicates to the agent
that access to the bus has been granted. Pin muxed with
GPIO45
GNT3#/CLK_REQ7#
/GPIO46
I/O
3.3V
(5-V tolerance)
PCI Bus Grant 3 / CLK_REQ7# / GPIO46
PCI Bus Grant 3 from the SB: indicates to the agent
that access to the bus has been granted. Pin muxed with
GPIO46
INT[H:E]#/
GPIO[35:32]
I/O
3.3V
(5-V tolerance)
PCI Interrupt [H:E] / GPIO [35:32]
IRDY#
I/O
3.3V
(5-V tolerance)
Initiator Ready: indicates the initiating agent’s ability
to complete the current data phase of the transaction
LOCK#
PAR
I/OD 3.3V
(5-V tolerance)
PCI Bus Lock
I/O
3.3V
(5-V tolerance)
PCI Bus Parity
PCICLK0
O
3.3V
(5-V tolerance)
33 MHz PCI clock 0
PCICLK1/GPO36
O
3.3V
(5-V tolerance)
33 MHz PCI clock 1 / GPIO36
PCICLK2/GPO37
O
3.3V
(5-V tolerance)
33 MHz PCI clock 2 / GPIO37
Pin Descriptions
42
47283 2.10 Dec 2010
Pin Name
AMD SB820M Southbridge Databook
Type Voltage
Functional Description
PCICLK3/GPO38
O
3.3V
(5-V tolerance)
33 MHz PCI clock 3 / GPIO38
PCICLK4/14M_OSC
/GPO39
O
3.3V
(5-V tolerance)
33 MHz PCI clock 4 / 14M_OSC / GPO39
PCIRST#
O
3.3V
(5-V tolerance)
Hardware Reset for PCI Slots
Deassertion after SB_PWRGD assertion on power up
or resume from S3 and S4.
Asserted sometime after SB PWR_GOOD is deasserted
during power off or during a transition into S4/S5.
PERR#
I/O
3.3V
(5-V tolerance)
Parity Error. Reports data parity errors during all PCI
transactions, except in a special cycle.
REQ0#
I
3.3V
(5-V tolerance)
PCI Request 0 Input
Request 0 Input. Indicates that the agent desires use of
the bus.
REQ1#/GPIO40
I
3.3V
(5-V tolerance)
PCI Request 1 Input / GPIO 40
Request 1 Input. Indicates that the agent desires use of
the bus.
REQ2#/
CLK_REQ8#/
GPIO41
I
3.3V
(5-V tolerance)
PCI Request 2 Input / CLK_REQ8# / GPIO 41
Request 2 Input. Indicates that the agent desires use of
the bus
REQ3#/CLK_REQ5#
/GPIO42
I
3.3V
(5-V tolerance)
PCI Request 3 Input / CLK_REQ5# / GPIO 42
Request 3 Input. Indicates that the agent desires use of
the bus.
SERR#
I/OD 3.3V
(5-V tolerance)
System Error. For reporting address parity errors and
data parity errors on the special cycle command, or any
other system error where the result will be catastrophic.
STOP#
I/O
3.3V
(5-V tolerance)
Stop. Indicates the current target is requesting the
master to stop the current transaction
TRDY#
I/O
3.3V
(5-V tolerance)
Target Ready. Indicates the target agent’s ability to
complete the current data phase of the transaction.
Pin Descriptions
43
47283 2.10 Dec 2010
AMD SB820M Southbridge Databook
4.6 USB Interface
Table 12. USB Interface Pin Descriptions
Pin Name
Type
Voltage
Functional Description
USB_HSD[13:0]P
I/O
VDDAN_33_US
B
USB Port 13 ~ 0 Positive I/O
USB_HSD[13:0]N
I/O
VDDAN_33_US
B
USB Port 13 ~ 0 Negative I/O
USB_FSD1P/
GPIO186
I/O
VDDIO_33_S
USB port 1 (full/low speed) Positive I/O / GPIO 186
USB_FSD0P/
GPIO185
I/O
VDDIO_33_S
USB port 0 (full/low speed) Positive I/O / GPIO 185
USB_FSD[1:0]N
I/O
VDDIO_33_S
USB port 1:0 (full/low speed) Negative I/O
USBCLK/
14M_25M_48M_O
SC
I/O
VDDPL_33_USB
14, 25, or 48-MHz output clock (not used as USB
clock on SB820M platforms)
I
VDDPL_33_USB
Compensating resistors input.
USB_RCOMP
USB_OC0#/TRST#/
GEVENT12#
I/O
VDDIO_33_S
USB Over Current 0# / JTAG Reset/ GEVENT12#
USB_OC1#/TDI/
GEVENT13#
I/O
VDDIO_33_S
USB Over Current 1# / JTAG Data In/
GEVENT13#
USB_OC2#/TCK/
GEVENT14#
I/O
VDDIO_33_S
USB Over Current 2# / JTAG Clock/ GEVENT14#
USB_OC3#/
AC_PRES/TDO/
GEVENT15#
I/O
VDDIO_33_S
USB Over Current 3# / AC Power Present/JTAG
Data Out/ GEVENT15#
USB_OC4#/
IR_RX0/
GEVENT16#
I/O
VDDIO_33_S
USB Over Current 4# / IR_RX0 / GEVENT16#
USB_OC5#/
IR_TX0/
GEVENT17#
I/O
VDDIO_33_S
USB Over Current 5# / IR_TX0 / GEVENT17#
USB_OC6#/
IR_TX1/
GEVENT6#
I/O
VDDIO_33_S
USB Over Current 6# / IR TX1 / GEVENT6#
Pin Descriptions
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Pin Name
BLINK/USB_OC7#/
GEVENT18#
AMD SB820M Southbridge Databook
Type
I/O
Voltage
Functional Description
VDDIO_33_S
BLINK / USB Over Current 7#/ GEVENT18#
Notes:
(1) The USB_HSD[13:0]P and USB_HSD[13:0]N signals are used for connecting internal or external
USB devices through the USB Port connectors. These ports are handled by users and are subject directly
to ESD events to either the connector, the device, or to the pins themselves. The USB_HSDP and
USB_HSDN signals that may be exposed to the user through an USB port connection must have ESD
protection.
(2) The USB_FSD[1:0]P and USB _FSD[1:0]N signals are used only for connecting to internal devices.
They support only full or low, but not high speed devices.
(3) The USBCK/14M_25M_48M_OSC pin output a 14.318MHz clock on the first power up if the
internal system clock generator mode strap is selected.
4.7 Flash Interface
Note: The flash controller function is NOT supported by the SB820M. The alternative
functionality of these pins, such as GPIO, will still be supported. The pins on the flash interface
should be connected as described in the AMD SB800-Series Southbridges Schematic Review
Checklist.
Table 13. Flash Interface Pin Descriptions
Pin Name
FC_RST#/GPO160
Type
OD
Voltage
Functional Description
VDDIO_33_S
(5-V tolerance)
Flash reset/General purpose output 160
FC_CLK
O
1.8V
(3.3-V tolerance)
Flash clock
FC_FBCKIN
I
1.8V
(3.3-V tolerance)
Flash feedback clock input
FC_FBCLKOUT
O
1.8V
(3.3-V tolerance)
Flash feedback clock output
FC_ADQ[15:0]/
GPIOD[143:128]
I/O
1.8V
(3.3-V tolerance)
Flash data bus/ GPIOD [143:128]
FC_OE#/GPIOD145
I/O
1.8V
(3.3-V tolerance)
Flash output enable / GPIOD145
FC_AVD#/
GPIOD146
I/O
1.8V
(3.3-V tolerance)
Flash address valid detect / GPIOD146
FC_INT1/
GPIOD144
I/O
1.8V
(3.3-V tolerance)
Flash interrupt 1 / GPIOD144
Pin Descriptions
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47283 2.10 Dec 2010
Pin Name
AMD SB820M Southbridge Databook
Type
Voltage
Functional Description
FC_INT2/GPIOD147
I/O
1.8V
(3.3-V tolerance)
Flash interrupt 2 / GPIOD147
FC_WE#/GPIOD148
I/O
1.8V
(3.3-V tolerance)
Flash write enable / GPIOD148
FC_CE1#/GPIOD149
I/O
1.8V
(3.3-V tolerance)
Flash chip enable 1 / GPIOD149
FC_CE2#/GPIOD150
I/O
1.8V
(3.3-V tolerance)
Flash chip enable 2 / GPIOD150
Note: FC I/O is 1.8-V I/O with 3.3-V GPI (3.3-V input tolerance) or OD GPIO when FC is disabled.
4.8 Serial ATA Interface
Table 14. Serial ATA Interface Pin Descriptions
Pin Name
Type
Voltage
Functional Description
3.3V
SATA Channel Active / GPIO 67
SATA_ACT#/
GPIO67
OD
SATA_CALRP
I
1.1V (Filtered)
Pad connection to an external resistor to VSS_SATA
on the motherboard, for TX impedance calibration
SATA_CALRN
I
1.1V (Filtered)
Pad connection to an external resistor to VDD_SATA
on the motherboard, for RX impedance calibration
SATA_RX[5:0]N
I
1.1V (Filtered)
SATA Channel[5:0] Receive Negative
SATA_RX[5:0]P
I
1.1V (Filtered)
SATA Channel[5:0] Receive Positive
SATA_TX[5:0]N
O
1.1V (Filtered)
SATA Channel[5:0] Transmit Negative
SATA_TX[5:0]P
O
1.1V (Filtered)
SATA Channel[5:0] Transmit Positive
SATA_X1
I
3.3V (Filtered)
SATA 25MHz crystal clock input (external clock chip
mode)
SATA_X2
O
3.3V (Filtered)
SATA 25MHz crystal clock input (external clock chip
mode)
CLK_REQ4#/
SATA_IS0#/
GPIO64
I/O
3.3V
PCIe® Clock Request 4#/ SATA Interlock Switch Port
0 (Input) / GPIO 64
CLKREQ3#/
SATA_IS1#/
GPIO63
I/O
3.3V
PCIe clock request 3#/ SATA Interlock Switch Port 1
(Input) / GPIO 63
Pin Descriptions
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47283 2.10 Dec 2010
Pin Name
AMD SB820M Southbridge Databook
Type
Voltage
Functional Description
SMARTVOLT1/
SATA_IS2#/
GPIO50
I/O
3.3V
Reduce system voltages / SATA Interlock Switch Port
2 (input) / GPIO 50
CLKREQ0#/
SATA_IS3#/
GPIO60
I/O
3.3V
PCIe clock request 0#/ SATA Interlock Switch Port 3
(input) / GPIO 60
SATA_IS4#/
FANOUT3/
GPIO55
I/O
3.3V
SATA Interlock Switch Port 4 (input) / Fan control
output3 / GPIO 55
SATA_IS5#/
FANIN3/
GPIO59
I/O
3.3V
SATA Interlock Switch Port 5 (input) / Fan Tach In3 /
GPIO 59
Note: Each port has a pin (SATA_IS) for sensing the status of the external interlock switch. If the
motherboard implements SATA interlock switches, it should connect the statuses of the switches to those
pins. The SB can sense such statuses and, when they change, generate a PME or interrupt. Normally, an
inter-lock switch is required for supporting hot plug.
4.9
HD Audio Interface
Table 15. HD Audio Interface Pin Descriptions
Pin Name
Type Voltage
Functional description
AZ_BITCLK
O
VDDIO_33_S/
S5_1.5V
HD Audio Interface Bit Clock
AZ_RST#
O
VDDIO_33_S/
S5_1.5V
HD Audio Interface Reset
I/O
VDDIO_33_S/
S5_1.5V
HD Audio Serial Data Input from Codec [3:0] /
GPIO [170:167]
AZ_SDOUT
O
VDDIO_33_S/
S5_1.5V
HD Audio Serial Data Output to Codec
AZ_SYNC
O
VDDIO_33_S/
S5_1.5V
HD Audio Sync signal to Codec
AZ_SDIN[3:0]/
GPIO[170:167]
Pin Descriptions
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AMD SB820M Southbridge Databook
4.10 Real Time Clock Interface
Table 16. Real Time Clock Interface
Pin Name
Type
Voltage
Functional Description
32K_X1
I
VDDIO_33_S/
VDDBT_RTC_G
RTC crystal oscillator input 1 (internal RTC)
32K_X2
O
VDDIO_33_S/
VDDBT_RTC_G
RTC crystal oscillator input 2 (internal RTC)
RTCCLK
I/O
VDDIO_33_S
32 kHz output for internal RTC
VDDBT_RTC_G
RTC battery supply
VDDBT_RTC_G
I
INTRUDER_ALER
T#
I
Intruder alert sense input
VDDBT_RTC_G
4.11 SPI ROM Interface
SPI ROM is supported up to 33 MHz. The burst read and fast read cycles are not supported.
Table 17. SPI ROM Interface Pin Descriptions
Pin Name
Type
Voltage
Functional Description
SPI_CS#/GPIO165
I/O
VDDIO_33_S
SPI Chip Select# / GPIO 165
SPI_CS2#/
GBE_STAT2/
GPIO166
I/O
VDDIO_33_S
SPI Chip Select2#/ Gigabit LAN status2/ GPIO 166
SPI_CS3#/
GBE_STAT1/
GEVENT21#
I/O
VDDIO_33_S
SPI Chip Select3# / Gigabit LAN status1/GEVENT 21
SPI_CLK/GPIO162
I/O
VDDIO_33_S
SPI Clock / GPIO 162
SPI_DI/GPIO164
I/O
VDDIO_33_S
SPI Data In / GPIO 164
SPI_DO/GPIO163
I/O
VDDIO_33_S
SPI Data Output / GPIO 163
Pin Descriptions
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AMD SB820M Southbridge Databook
4.12 Power Management Interface
Table 18. Power Management Interface Pin Descriptions
Pin Name
Type
Voltage
Functional Description
ALLOW_LDTSTP/
DMA_ACTIVE#
In/OD
VDDIO_33_S
(0.8V
threshold)
ALLOW LDT STOP/DMA active
ALLOW_LDT STOP Input from NB to allow
assertion of LDT_STP#. When ALLOW_LDTSTP is
deasserted, SB cannot assert LDT_STP#.
ALLOW_LDTSTP is used to implement stutter mode
operation for the CPU.
DMA active: In CLMC mode the SB will drive the
ALLOW_LDTSTP/DMA_ACTIVE# to NB to inform
NB when it can assert LDT_STP#.
LDT_PG
OD
VDDIO_33_S
(0.8V
threshold)
LDT Power Good
LDT_STP#
OD
VDDIO_33_S
(0.8V
threshold)
Assertion of LDTSTOP# on the CPU causes it to enter
C3, or S1/S2/S3/S4/S5. Assertion takes place: (a) for
S1/S2/S3/S4/S5: after SUS_STAT# is asserted; (b) for
C3: after the STPGNT message is received by the
system.
Deassertion of LDTSTOP_L causes the CPU to return
to C0 or S0 state. Deassertion takes place following a
wake-up event:
(a) in S1: at an interval (programmed by an SB
register) after deassertion of CPU_STP#;
(b) in S3/S4/S5: after SB PWR_GOOD is asserted;
(c) in C3: at an interval (programmed by an SB
register)
Both the NB and SB can control the LDT_STP#
during C state.
I
3.3V
(5-V tolerance)
PCI Express® Graphic Slot Clock Request / GPIO 65
/ 14.318MHz OSC Input / IDLEEXIT#
IDLEEXT#: This is used by CPU to cause a break
event to SB to exit C3/C1e state.
LPC_PME#/
GEVENT3#
I/O
VDDIO_33_S
LPC PME# Power management signal for LPC
interface. Can be used as input / General Event 3 if not
used for LPC PME function.
LPC_SMI#/
GEVNT23#
I/O
VDDIO_33_S
LPC SMI Input / General Event 23
CLK_REQG#/
GPIO65/OSCIN/
IDLEEXIT#
Pin Descriptions
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47283 2.10 Dec 2010
Pin Name
AMD SB820M Southbridge Databook
Type
Voltage
Functional Description
PCI_PME#/
GEVENT4#
I/O
VDDIO_33_S
PCI PME Input / General Event 4
PWR_BTN#
I
VDDIO_33_S
Power Button. The Power Button causes an SMI or
SCI to indicate a system request to go to a sleep state.
If the system is already in a sleep state, this signal will
cause a wake event. If PWRBTN# is pressed for more
than 4 seconds, it will cause an unconditional
transition (power button override) to the S5 state with
only the PWRBTN# available as a wake event.
Override will occur even if the system is in the S1
state. This signal has an internal pull-up resistor.
PWR_GOOD
I
VDDIO_33_S
SB power good input
Assertion of PWR_GOOD by the SB power good
circuit on the motherboard indicates that power
supplies to the SB are valid. Assertion takes place
sometime after NB Power Good is asserted.
Deassertion of PWR_GOOD by the SB power good
circuit indicates that the power supplies to the SB are
NOT valid. Deassertion takes place sometime after
SLP_S3# or SLP_S5#’s assertion, or after Power
Supply Power Good is deasserted.
RI#/GEVNT22#
I/O
VDDIO_33_S
Ring Indicator / General Event 22
SMARTVOLT2/
SHUTDOWN#/
GPIO51
I/O
3.3V
(5-V tolerance)
Set system rails to lower voltage / System Shutdown /
GPIO51
System Shutdown: Assertion will cause the SB to
assert SLP_S3# and SLP_S5# to force system to
transition to S5 immediately, without waiting for the
STPGNT message from the processor.
O
VDDIO_33_S
S3 Sleep Power plane control
Assertion of SLP_S3# shuts off power to non-critical
components when system transitions to S3, S4, or S5
states. Assertion takes place sometime after
CPU_STP# is asserted.
Deassertion of SLP_S3# turns on power to noncritical components when system transitions from S3,
S4, or S5 back to S0. Deassertion takes place
sometime after a wake-up event has been triggered.
SLP_S3#
Pin Descriptions
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AMD SB820M Southbridge Databook
Pin Name
Type
Voltage
Functional Description
SLP_S5#
O
VDDIO_33_S
S5 Sleep Power plane control Assertion of SLP_S5# shuts power off to non-critical
components when system transitions to S4 or S5 state.
Assertion takes place sometime after CPU_STP# is
asserted.
Deassertion of SLP_S5# turns on power to noncritical components when transitioning from S4/S5
back to S0 state. Deassertion takes place sometime
after a wake-up event is triggered.
THRMTRIP#/
SMBALERT#/
GEVENT2#
I/O
VDDIO_33_S
Thermal Trip / SMBus Alert / General Event 2
Thermal Trip: Signal indicates to the SB that a
thermal trip has occurred. Its assertion will cause the
SB to transition the system to S5 immediately, without
waiting for the STPGNT message from the processor.
SUS_STAT#
OD
VDDIO_33_S
Suspend Status –
Assertion by the SB indicates that the system will be
entering a low-power state soon. The signal is
monitored by those devices with memory that needs to
switch from normal refresh to suspend refresh mode
when the system transitions to a low-power state.
Assertion takes place after the Stop Grant message
from the CPU is received by the system.
Deassertion by the SB indicates that the system is
exiting a low power state now and is returning to S0.
Deassertion takes place after LDT_STP# is
deasserted.
TEMPIN3/
TALERT#/
GPIO174
I/O
VDDIO_33_S
Temperature Monitor Input 3/ Thermal Alert /
GPIO 174
Thermal Alert: The signal is a thermal alert to the SB.
SB can be programmed to generate an SMI, SCI, or
IRQ13 through GPE, or generate an SMI without GPE
in response to the signal’s assertion. See the AMD
SB800-Series Southbridges Register Reference Guide
(PID# 45482) for details.
Pin Descriptions
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Pin Name
WAKE#/
GEVENT8#
AMD SB820M Southbridge Databook
Type
I/O
Voltage
Functional Description
VDDIO_33_S
PCI Express® Wake /General Event 8
PCI Express Wake: On Power up this pin will
function as WAKE# in legacy mode. Optionally,
WAKE# in native mode can be enabled after power
up, only by software. When the pin is asserted
(active low) the Southbridge will generate the wake
event. The WAKE# function is supported in S5
through S0, with the following restriction:
Wake function in S5 state—When transitioning
from G3 to S5, the WAKE# function will not be
enabled. However, after an initial transition from
S5 to S0 and back to S5, the WAKE# function will
be enabled. It will stay enabled for any subsequent
transition from S0 to S5.
Care must be taken when plugging in PCIe® devices.
The system should be transitioned into the G3 state
(S5 power off) before a PCIe device is installed.
Plugging in a PCIe device when the system is in S5
state may cause the system to wake up, because the
WAKE# signal driven by the PCIe device may
transition momentarily to the active state when the
device is installed but has not been initialized to drive
the signal in an inactive state.
NB_PWRGD
OD
3.3V
Northbridge Power good
4.13 SMBus Interface
Table 19. SMBus Interface Pin Descriptions
Pin Name
Type
Voltage
Functional Description
SCL0/GPIO43
I/OD
3.3V
(5-V tolerance)
SMBus Clock 0 / GPIO 43
Note: Pin type is I/O when configured as GPIO.
SDA0/GPIO47
I/OD
3.3V
(5-V tolerance)
SMBus Data 0 / GPIO 47
Note: Pin type is I/O when configured as GPIO.
SCL1/GPIO227
I/OD
VDDIO_33_S
SMBus Clock 1 / GPIO 227
This SMBus Clock is for supporting an ASF interface.
Note: Pin type is I/O when configured as GPIO.
SDA1/GPIO228
I/OD
VDDIO_33_S
SMBus Data 1 / GPIO 228
This SMBus Data is for supporting an ASF interface.
Note: Pin type is I/O when configured as GPIO.
Pin Descriptions
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AMD SB820M Southbridge Databook
Pin Name
Type
Voltage
Functional Description
SCL2/GPIO193
I/OD
VDDIO_33_S
SMBus Clock 2/GPIO 193
Note: Pin type is I/O when configured as GPIO.
SDA2/GPIO194
I/OD
VDDIO_33_S
SMBus Data 2/GPIO 194
Note: Pin type is I/O when configured as GPIO.
SCL3_LV/GPIO195
I/OD
VDDIO_33_S
domain (0.8V
threshold)
SMBus Clock 3/GPIO 195
Note: Pin type is I/O when configured as GPIO.
SDA3_LV/GPIO196
I/OD
VDDIO_33_S
domain (0.8V
threshold)
SMBus Data 3/GPIO 196
Note: Pin type is I/O when configured as GPIO.
PS2_CLK/SCL4/
GPIO188
I/OD
VDDIO_33_S
Aux PS2 Clock / SMBus Clock 4/GPIO 188
Note: Pin type is I/O when configured as GPIO.
PS2_DAT/SDA4/
GPIO187
I /OD VDDIO_33_S
Aux PS2 Data / SMBus Data 4/GPIO 184
Note: Pin type is I/O when configured as GPIO.
THRMTRIP#/
SMBALERT#/
GEVENT2#
I/O
VDDIO_33_S
Thermal Trip / SMBus Alert# / General Event 2
SM Bus Alert: This signal is used to wake the system
or generate an SMI. If not used for SMBALERT#, it
can be used for thermal trip or as a GEVENT.
Note:
(1) The SDA1 and SCL1 SMBus interface is dedicated for ASF devices only. It should not be used to
connect to any other devices.
(2) There are only two SMBus controllers. The SCL1/SDA1 pair is controlled by SMBus controller 1.
SCL0/SDA0, SCL2/SDA2, SCL3/SDA3 and SCL4/SDA4 are multiplexed pins that are all controlled by
SMBus controller 0, and only 1 pair of those pins can be active at any time.
4.14 Reset / Clocks / ATE / JTAG
Table 20. Reset/Clocks/ATE/JTAG Interface Pin Descriptions
Pin Name
Type
Voltage
Functional Description
PCI Host Bus Reset. Asserted during transition to
S3/S4/S5 to reset all devices in the SB or connected to
it, except the ACPI logic in the SB.
A_RST#
O
VDDIO_33_S
AZ_RST#
O
VDDIO_33_S/
S5_1.5V
OD
VDDIO_33_S
DDR3_RST#/
GEVENT7#
HD Audio interface Reset
System Memory Reset /General Event 7
Pin Descriptions
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47283 2.10 Dec 2010
Pin Name
AMD SB820M Southbridge Databook
Type
Voltage
Functional Description
FC_RST#/GPO160
OD
VDDIO_33_S
Flash Reset / General purpose output 160
GBE_PHY_RST#
O
VDDIO_33_S
Gigabit PHY Reset
VDDIO_33_S
(0.8V threshold)
LDT Reset#. Reset signal to the CPU.
Assertion of LDT_RST# causes the CPU to transition
into a low power state and to deassert
MEMCLKEA/B and assert MEMREST_L. Assertion
of LDT_RST# takes place sometime after SB
PWRGOOD has been deasserted.
Deassertion of LDT_RST# allows MEMRESET_L to
be deasserted and MEMCLK to be enabled.
Deassertion of LDT_RST# takes place sometime after
SB PWR_GOOD has been asserted.
LDT_RST#
OD
PCIE_RST#
O
VDDIO_33_S
PCIe® Reset. Asserted during transition to S3/S4/S5.
PCIRST#
O
3.3 V
(5-V Tolerance)
Hardware Reset for PCI Slots
Assertion: (a) at power on, (b) sometime after
CPU_STP#’s assertion in S0, (c) after the system has
transitioned into S4/S5.
Deassertion: sometime after SB PWR_GOOD is
asserted during power on or during a transition from
S4/S5 to S0.
I/O
VDDIO_33_S
ROM Reset / GPIO 161
ROM Reset : Early version of system reset, the
deassertion of which is ahead of other system reset
signals such as A_RST#, PCIE_RST#, or PCIRST#.
Used for resetting the system BIOS flash ROM.
I
VDDIO_33_S
Resume Reset from Motherboard –
Assertion of RSMRST# resets all SB registers to their
default values. It also causes all reset signals
originating from the SB (A_RST#, PCIRST#,
PCIE_RST#, LDT_RST#, AZ_RST#, FC_RST#,
GBE_PHY_RST#, ROM_RST# and, DDR3_RST#)
to be issued. RSRMT# should be asserted when
system power is being applied first time. RSMRST#
should be deasserted sometime after S5 power is up,
and should stay deasserted until system power is
removed.
ROM_RST#/
GPIO161
RSMRST#
Pin Descriptions
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47283 2.10 Dec 2010
Pin Name
SYS_RESET#/
GEVENT19#
AMD SB820M Southbridge Databook
Type
I/O
Voltage
Functional Description
VDDIO_33_S
System Reset / General Event 19
System Reset: Signal coming from the power button
circuit signaling a reset for the system. On receiving
the signal, the SB asserts all reset signals that
originate from the SB (A_RST#, PCIRST#,
PCIE_RST#, LDT_RST#, AZ_RST#, FC_RST#,
GBE_PHY_RST#, ROM_RST#, and DDR3_RST#).
it also resets all SB registers to their default values.
25M_X1
I
3.3V
25 MHz crystal clock
(VDDXL_33_S) Clock source for SB internal core PLLs.
25M_X2
O
3.3V
25 MHz crystal clock output
(VDDXL_33_S)
14M_25M_48M_OS
C
O
VDDIO_33_S
14.318MHz / 25MHz / 48MHz OSC for KBC, SIO,
LAN, etc.
PCICLK4/
14M_OSC/GPO39
O
3.3V
33 MHz PCI Clock 4 / 14.318M Clock Output /
GPO 39
For external system clock generator mode: 33MHz
PCI clock output.
For integrated system clock generator mode:
14.318MHz clock output for internal system clock
generator mode.
The function is selected by the pin strap “CLKGEN”
(pin LPCCLK1). Refer to Table 28.
I/O
VDDIO_33_S
14.318M or 25M or 48MHz output
CPU_HT_CLKP
O
1.1V
(VDDAN_11_
CLK)
Positive phase of 200MHz reference clock. Spread
capable.
CPU_HT_CLKN
O
1.1V
(VDDAN_11_
CLK)
Negative phase of 200MHz reference clock. Spread
capable.
GPP_CLK[8:0]P
O
1.1V
(VDDAN_11_
CLK)
Positive phase of 100MHz reference clock for PCIe
device(s). Spread capable.
GPP_CLK[8:0]N
O
1.1V
(VDDAN_11_
CLK)
Negative phase of 100MHz reference clock for PCIe
device(s). Spread capable.
USBCLK/
14M_25M_48M_OS
C
Pin Descriptions
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47283 2.10 Dec 2010
Pin Name
AMD SB820M Southbridge Databook
Type
Voltage
Functional Description
PCIE_RCLKP/
NB_LNK_CLKP
I/O
1.1V
(VDDAN_11_
CLK)
For external system clock generator mode: Positive
phase of 100MHz reference clock for the SB. Spread
capable.
For integrated system clock generator mode:
Positive phase of NB ALINK III reference clock.
Spread capable.
The function is selected by the pin strap “CLKGEN”
(pin LPCCLK1). Refer to Table 28
PCIE_RCLKN/
NB_LNK_CLKN
I/O
1.1V
(VDDAN_11_
CLK)
For external system clock generator mode:
Negative phase of 100MHz reference clock for the
SB. Spread capable.
For integrated system clock generator mode:
Negative phase of NB ALINK III reference clock.
Spread capable.
The function is selected by the pin strap “CLKGEN”
(pin LPCCLK1). Refer to Table 28
NB_DISP_CLKP
O
1.1V
(VDDAN_11_
CLK)
Positive phase of 100MHz reference clock for NB’s
Display Engine. Non-spread.
NB_DISP_CLKN
O
1.1V
(VDDAN_11_
CLK)
Negative phase of 100MHz reference clock for NB’s
Display Engine. Non-spread.
NB_HT_CLKP
O
1.1V
(VDDAN_11_
CLK)
Positive phase of 100MHz reference clock. Spread
capable.
NB_HT_CLKN
O
1.1V
(VDDAN_11_
CLK)
Negative phase of 100MHz reference clock. Spread
capable.
SLT_GFX_CLKP
O
1.1V
(VDDAN_11_
CLK)
Positive phase of 100MHz reference clock for discrete
graphics device. Spread capable.
SLT_GFX_CLKN
O
1.1V
(VDDAN_11_
CLK)
Negative phase of 100MHz reference clock for
discrete graphics device. Spread capable.
CLK_REQ0#/
SATA_IS3#/
GPIO60
I/O
3.3V
(5-V tolerance)
Clock Request 0 / SATA Interlock Switch Port 3
(input) / GPIO 60
CLK_REQ1#/
FANOUT4/
GPIO61
I/O
3.3V
(5-V tolerance)
Clock Request 1 / Fan Output 4 / GPIO 61
Pin Descriptions
56
47283 2.10 Dec 2010
Pin Name
AMD SB820M Southbridge Databook
Type
Voltage
Functional Description
CLK_REQ2#/
FANIN4/GPIO62
I/O
3.3V
(5-V tolerance)
Clock Request 2 / Fan Input 4 / GPIO 62
CLK_REQ3#/
SATA_IS1#/
GPIO63
I/O
3.3V
(5-V tolerance)
Clock Request 3 / SATA Interlock Switch Port 1
(input) / GPIO 63
CLK_REQ4#/
SATA_IS0#/
GPIO64
I/O
3.3V
(5-V tolerance)
Clock Request 4 / SATA Interlock Switch Port 0
(input) / GPIO 64
REQ3#/CLK_REQ5
#/GPIO42
I
3.3V
(5-V tolerance)
PCI Request 3 / Clock Request 5 / GPIO 42
LDRQ1#/CLK_RE
Q6#/GPIO49
I/O
3.3V
(5-V tolerance)
Encoded DMA Bus Master Request 1/Clock Request
6 / GPIO 49
GNT3#/
CLK_REQ7#/
GPIO46
I/O
3.3V
(5-V tolerance)
PCI Grant 3 / Clock Request 7 / GPIO 46
REQ2#/
CLK_REQ8#/
GPIO41
I
3.3V
(5-V tolerance)
PCI Request 2 / Clock Request 8 / GPIO 41
CLK_REQG#/
GPIO65/OSCIN/
IDLEEXIT#
I
3.3V
(5-V tolerance)
PCI Express® Graphic Slot Clock Request / GPIO 65
/ 14.318MHz OSC Input / IDLEEXIT#
14.318MHz OSC clock input pin. For debug purpose
only.
TEST0
I
VDDIO_33_S
ATE Test 0
TEST1/TMS
I
VDDIO_33_S
ATE Test 1/ JTAG TMS
TEST2
I
VDDIO_33_S
ATE Test 2
EFUSE
I
VDDIO_33_S
Efuse. Pull to GND on motherboard.
USB_OC0#/TRST#/
GEVENT12#
I/O
VDDIO_33_S
USB Over Current 0# / JTAG Reset/ GEVENT 12
USB_OC1#/TDI/
GEVENT13#
I/O
VDDIO_33_S
USB Over Current 1# / JTAG Data In/ GEVENT 13
USB_OC2#/TCK/
GEVENT14#
I/O
VDDIO_33_S
USB Over Current 2# / JTAG Clock/ GEVENT 14
USB_OC3#/
AC_PRES/TDO/
GEVENT15#
I/O
VDDIO_33_S
USB Over Current 3# / AC Power Present/JTAG Data
Out/ GEVENT 15
Pin Descriptions
57
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4.15
AMD SB820M Southbridge Databook
General Purpose I/O and General Event
The GPIO and GEVENT pins of the SB are multiplexed with other functions. For information on
how to configure the GPIO pins for the desired functions, see the AMD SB800-Series
Southbridges Register Reference Guide (PID# 45482).
Table 21 lists all the GPIO and GEVENT pins on the SB. The Default I/O State column shows
the direction and the state of the pin after the core power has become stable (VDDCR > ~0.8V).
The integrated resistor column shows the default status of the internal integrated pull-up/pulldown resistor on the pin after the PCI host bus reset (A_RST#) is deasserted. The integrated
resistor can be enabled/disabled by system BIOS after boot up.
Notes:
1. Certain GPIOs are multiplexed with pins on the flash controller, keyboard and PS/2 controller,
or Gigabit Ethernet Media Access Controller (GbE MAC) interfaces. The flash controller,
keyboard and PS/2 controller, and GbE MAC functions are NOT supported by the SB, and pin
name prefixes like “FC,” “GbE,” or “PS2” do not imply availability of those functions.
2. The voltage monitor function is NOT supported by the SB. The “VIN” prefix of certain GPIOs
does not imply availability of the VIN function.
3. GPIO[35:0] can only be used if the PCI interface is not used and is disabled by programming the PM
register EAh bit 0 to 1.
Table 21. General Purpose I/O and General Event Pin Descriptions
System Pin Name
Default
Muxed
Function
Default
I/O
State
Integrated Functional Descriptions
Resistor
Type
Level
GA20IN/GEVENT0#
I
3.3V
(5-V
tolerance)
KBRST#/
GEVENT1#
I
3.3V
KBRST# Input, PU 8.2K PU Keyboard Reset / General
(5-V
Event 1
tolerance)
Note: On G3 to S5 transition,
the BIOS will not be able to
program this pin as Gevent1#.
If the pin is used as Gevent1#,
the design should ensure that
the pin remains in logical high
during the G3  S5  S0
transition. BIOS can then
program this pin as Gevent1#
when it is posting.
General Events
null
Input, PU 8.2K PU A20Gate input from SIO /
General Event 0
Pin Descriptions
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AMD SB820M Southbridge Databook
Type
Level
Default
Muxed
Function
THRMTRIP#/
SMBALERT#/
GEVENT2#
I/O
VDDIO_
33_S
THRM
TRIP#
LPC_PME#/
GEVENT3#
I/O
VDDIO_
33_S
null
Input, PU 10K PU LPC PME# Input / General
Event 3
PCI_PME#/
GEVENT4#
I/O
VDDIO_
33_S
null
Input, PU 10K PU PCI PME# Input / General
Event 4
GEVENT5#
I/O
VDDIO_
33_S
null
Input, PU 10K PU General Event 5
USB_OC6#/IR_TX1/
GEVENT6#
I/O
VDDIO_
33_S
null
Input, PU 10K PU* USB Over Current 6 / Infrared
Transmit 1 / General Event 6
*Note: Integrated PU is not
supported when the pin is
configured for USB over
current function.
DDR3_RST#/
GEVENT7#
I/O
VDDIO_
33_S
DDR3_
RST#
System Pin Name
Default
I/O
State
Integrated Functional Descriptions
Resistor
Input, PU 10K PU Thermal Trip# / SM Bus
Alert# / General Event 2
Output
LOW
10K PU DDR3 Reset# / General Event
for
7
GEVENT
#
(OD for
DDR3_R
ST#)
WAKE#/GEVENT8#
I/O
VDDIO_
33_S
null
Input, PU 10K PU PCI Express® Wake / General
Event 8
GBE_LED1/
GEVENT9#
I/O
VDDIO_
33_S
null
Input, PU 10K PU GbE LED 1 / General Event 9
GBE_LED2/
GEVENT10#
I/O
VDDIO_
33_S
null
Input, PU 10K PU GbE LED 2 / General Event
10
GBE_STAT0/
GEVENT11#
I/O
VDDIO_
33_S
null
Input, PU 10K PU GbE Status 0 / General Event
11
USB_OC0#/TRST#/
GEVENT12#
I/O
VDDIO_
33_S
null
Input, PU 10K PU* USB Over Current 0 / JTAG
Reset# / General Event 12
*Note: Integrated PU is not
supported when the pin is
configured for USB over
current function.
Pin Descriptions
59
47283 2.10 Dec 2010
System Pin Name
AMD SB820M Southbridge Databook
Default
Muxed
Function
Default
I/O
State
Integrated Functional Descriptions
Resistor
Type
Level
USB_OC1#/TDI/
GEVENT13#
I/O
VDDIO_
33_S
null
Input, PU 10K PU* USB Over Current 1 / JTAG
Test Data In / General Event
13
*Note: Integrated PU is not
supported when the pin is
configured for USB over
current function.
USB_OC2#/TCK/
GEVENT14#
I/O
VDDIO_
33_S
null
Input, PU 10K PU* USB Over Current 2 / JTAG
Test Clock / General Event 14
*Note: Integrated PU is not
supported when the pin is
configured for USB over
current function.
USB_OC3#/
AC_PRES/TDO/
GEVENT15#
I/O
VDDIO_
33_S
null
Input, PU 10K PU* USB Over Current 3 / AC
Present / Test Data Out /
General Event 15
*Note: Integrated PU is not
supported when the pin is
configured for USB over
current function.
USB_OC4#/IR_RX0/
GEVENT16#
I/O
VDDIO_
33_S
null
Input, PU 10K PU* USB Over Current 4 / Infrared
Receive 0/ General Event 16
*Note: Integrated PU is not
supported when the pin is
configured for USB over
current function.
USB_OC5#/IR_TX0/
GEVENT17#
I/O
VDDIO_
33_S
null
Input, PU 10K PU* USB Over Current 5 / Infrared
Transmit 0 / General Event 17
*Note: Integrated PU is not
supported when the pin is
configured for USB over
current function.
Pin Descriptions
60
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AMD SB820M Southbridge Databook
Default
Muxed
Function
Default
I/O
State
Integrated Functional Descriptions
Resistor
System Pin Name
Type
Level
BLINK/USB_OC7#/
GEVENT18#
I/O
VDDIO_
33_S
null
Input, PU 10K PU* LED Blink** / USB Over
Current 7 / General Event 18
Notes:
* Integrated PU is not
supported when the pin is
configured for USB over
current function.
** LED Blink function is not
supported.
SYS_RESET#/
GEVENT19#
I/O
VDDIO_
33_S
null
Input, PU 10K PU System Reset Button /
General Event 19
IR_RX1/
GEVENT20#
I/O
VDDIO_
33_S
null
Input, PU 10K PU Infrared Receive 1 / General
Event 20
SPI_CS3#/
GBE_STAT1/
GEVENT21#
I/O
VDDIO_
33_S
null
Input, PU 10K PU 3rd SPI Chip Select# / GbE
Status 1 / General Event 21
RI#/GEVENT22#
I/O
VDDIO_
33_S
null
Input, PU 10K PU Ring Indicator / General
Event 22
LPC_SMI#/
GEVENT23#
I/O
VDDIO_
33_S
null
Input, PU 8.2K PU LPC SMI Input / General
Event 23
S0-domain General Purpose I/O
AD[31:0]/
GPIO[31:0]
I/O
3.3V
(5-V
tolerance)
PCI
Output
HIGH
INTE#/GPIO32
I/O
3.3V
(5-V
tolerance)
PCI
Input, PU 8.2K PU PCI interrupt E / GPIO 32
INTF#/GPIO33
I/O
3.3V
(5-V
tolerance)
PCI
Input, PU 8.2K PU PCI interrupt F / GPIO 33
INTG#/GPIO34
I/O
3.3V
(5-V
tolerance)
PCI
Input, PU 8.2K PU PCI interrupt G / GPIO 34
INTH#/GPIO35
I/O
3.3V
(5-V
tolerance)
PCI
Input, PU 8.2K PU PCI interrupt H / GPIO 35
Pin Descriptions
-
PCI Address/Data bit [31:00]
/ GPIO [31:0]
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47283 2.10 Dec 2010
System Pin Name
AMD SB820M Southbridge Databook
Type
Level
Default
Muxed
Function
Default
I/O
State
Integrated Functional Descriptions
Resistor
PCICLK1/GPO36
O
3.3V
PCICLK
(5-V
tolerance)
Output
33MHz
-
33 MHz PCI Clock 1 / GPO
36
PCICLK2/GPO37
O
3.3V
PCICLK
(5-V
tolerance)
Output
33MHz
-
33 MHz PCI Clock 2 / GPO
37
PCICLK3/GPO38
O
3.3V
PCICLK
(5-V
tolerance)
Output
33MHz
-
33 MHz PCI Clock 3 / GPO
38
PCICLK4/14M_OSC
/GPO39
O
3.3V
PCICLK
(5-V
tolerance)
Output
-
33 MHz PCI Clock 4 / 14M
Clock Output / GPO 39
REQ1#/GPIO40
I
3.3V
(5-V
tolerance)
PCI
Input, PU 15K PU PCI Request 1 Input / GPIO
40
REQ2#/CLK_REQ8#
/GPIO41
I
3.3V
(5-V
tolerance)
PCI
Input, PU 15K PU PCI Request 2 Input /
CLKGEN CLK Req# 8 /
GPIO 41
REQ3#/CLK_REQ5#
/GPIO42
I
3.3V
(5-V
tolerance)
PCI
Input, PU 15K PU PCI Request 3 Input
PC/PCIDMA Request #0 /
GPIO 42
SCL0/GPIO43
I/O
3.3V
(5-V
tolerance)
null
Input,
Tri-State
-
SMBus Clk 0 / GPIO 43
GNT1#/GPO44
O
3.3V
(5-V
tolerance)
PCI
Output
HIGH
-
PCI Grant 1 from SB / GPO
44
GNT2#/GPO45
O
3.3V
(5-V
tolerance)
PCI
Output
HIGH
-
PCI Grant 2 from SB / GPO
45
I/O
3.3V
(5-V
tolerance)
null
GNT3#/CLK_REQ7#
/GPIO46
14MHz
(internal
CLKGEN)
or 33MHz
(external
CLKGEN)
Input, PU 8.2K PU PCI Grant 3 from SB /
CLKGEN CLK Req# 7 /
GPIO 46
Pin Descriptions
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47283 2.10 Dec 2010
AMD SB820M Southbridge Databook
Default
Muxed
Function
Default
I/O
State
3.3V
(5-V
tolerance)
null
Input,
Tri-State
I/O
3.3V
(5-V
tolerance)
null
Input, PU 8.2K PU Serial IRQ for DDMA / GPIO
48
I
3.3V
(5-V
tolerance)
null
Input, PU 8.2K PU Encoded DMA/Bus Master
Request 1 / CLKGEN CLK
Req# 6 / GPIO 49
SMARTVOLT1/
SATA_IS2#/GPIO50
I/O
3.3V
(5-V
tolerance)
null
Input, PU 8.2K PU Set system rails to lower
voltage / SATA interlock
detect / GPIO 50
SMARTVOLT2/
SHUTDOWN#/
GPIO51
I/O
3.3V
(5-V
tolerance)
null
Input, PU 8.2K PU Set system rails to lower
voltage / System shutdown /
GPIO 51
FANOUT0/GPIO52
I/O
3.3V
(5-V
tolerance)
null
Input, PU 8.2K PU Fan PWM Output 0 / GPIO
52
FANOUT1/GPIO53
I/O
3.3V
null
Input, PU 8.2K PU Fan PWM Output 1 / GPIO
53
FANOUT2/GPIO54
I/O
3.3V
null
Input, PU 8.2K PU Fan PWM Output 2 / GPIO
54
SATA_IS4#/
FANOUT3/GPIO55
I/O
3.3V
(5-V
tolerance)
null
Input, PU 8.2K PU SATA Interlock Switch 4
(input) / Fan Output 3 / GPIO
55
FANIN[2:0]/
GPIO[58:56]
I/O
3.3V
null
Input, PU 8.2K PU Fan Tach Input 0 / GPIO 56
SATA_IS5#/
FANIN3/GPIO59
I/O
3.3V
(5-V
tolerance)
null
Input, PU 8.2K PU SATA Interlock Switch 5
(input) / Fan Input 3 / GPIO
59
CLK_REQ0#/
SATA_IS3#/GPIO60
I/O
3.3V
(5-V
tolerance)
null
Input, PU 8.2K PU Clock Request# 0 / SATA
Interlock Switch 3 (input) /
GPIO60
CLK_REQ1#/
FANOUT4/GPIO61
I/O
3.3V
(5-V
tolerance)
null
Input, PU 8.2K PU CLKGEN CLK Req# 1 / Fan
Output 4 / GPIO 61
System Pin Name
Type
Level
SDA0/GPIO47
I/O
SERIRQ/GPIO48
LDRQ1#/
CLK_REQ6#/
GPIO49
Pin Descriptions
Integrated Functional Descriptions
Resistor
-
SMBus Data 0 / GPIO 47
63
47283 2.10 Dec 2010
System Pin Name
AMD SB820M Southbridge Databook
Default
Muxed
Function
Default
I/O
State
Integrated Functional Descriptions
Resistor
Type
Level
CLK_REQ2#/
FANIN4/GPIO62
I/O
3.3V
(5-V
tolerance)
null
Input, PU 8.2K PU CLKGEN CLK Req# 2 / Fan
Input 4 / GPIO 62
CLK_REQ3#/
SATA_IS1#/GPIO63
I/O
3.3V
(5-V
tolerance)
null
Input, PU 8.2K PU Clock Request 3 / SATA
Interlock Switch 1 (input) /
GPIO 63
CLK_REQ4#/
SATA_IS0#/GPIO64
I/O
3.3V
(5-V
tolerance)
null
Input, PU 8.2K PU CLKGEN CLK Req# 4 /
SATA Interlock Switch 0
(input) / GPIO 64
I
3.3V
(5-V
tolerance)
null
Input, PU 8.2K PU PCI Express Graphic Slot
CLKREQ# / GPIO 65 /
14.318MHz Clock Input /
IDLEEXIT#
SPKR/GPIO66
I/O
3.3V
(5-V
tolerance)
null
Input,
Tri-State
-
Speaker / GPIO 66
SATA_ACT#/
GPIO67
OD
3.3V
null
Input,
Tri-State
-
Serial ATA Activity Indicator
/ GPIO 67
CLK_REQG#/
GPIO65/OSCIN/
IDLEEXIT#
S5-domain General Purpose I/O
FC_RST#/GPO160
I/O
VDDIO_ FC_RST#
33_S (5V
tolerance)
Output
LOW
-
Flash memory reset / GPO
160
ROM_RST#/
GPIO161
I/O
VDDIO_ ROM_RS
33_S
T#
Output
LOW
-
ROM Reset / GPIO 161
SPI_CLK/GPIO162
I/O
VDDIO_
33_S
null or
SPI
(strap
dependent)
Input, PD 10K PD SPI Clock / GPIO 162
SPI_DO/GPIO163
I/O
VDDIO_
33_S
null or
SPI
(strap
dependent)
Input, PD 10K PD SPI Data Out / GPIO 163
Pin Descriptions
64
47283 2.10 Dec 2010
System Pin Name
AMD SB820M Southbridge Databook
Default
Muxed
Function
Default
I/O
State
Integrated Functional Descriptions
Resistor
Type
Level
SPI_DI/GPIO164
I/O
VDDIO_
33_S
null or
SPI
(strap
dependent)
Input, PD 10K PD SPI Data In / GPIO 164
SPI_CS1#/GPIO165
I/O
VDDIO_
33_S
null or
SPI
(strap
dependent)
Input, PU 10K PU SPI Chip Select# / GPIO 165
SPI_CS2#/
GBE_STAT2/
GPIO166
I/O
VDDIO_
33_S
null or
SPI
(strap
dependent)
Input, PU 10K PU 2nd SPI Chip Select# / GbE
Status 2 / GPIO 166
AZ_SDIN[3:0]/
GPIO[170:167]
I/O
VDDIO_
33_S/
S5_1.5V
AZ
TEMPIN[2:0]/GPIO[
173:171]
I/O
VDDIO_
33_S
null
Input
-
Temperature Monitor Input
[2:0] / GPIO [173:171]
TEMPIN3/TALERT#
/GPIO174
I/O
VDDIO_
33_S
null
Input
-
Temperature Monitor Input 3
/ Temperature has reached
cautionary state / GPIO 174
VIN0/GPIO175
I/O
VDDIO_
33_S
null
Input
-
Voltage Monitor Input 0 /
GPIO 175
VIN1/GPIO176
I/O
VDDIO_
33_S
null
Input
-
Voltage Monitor Input 1 /
GPIO 176
VIN2/GPIO177
I/O
VDDIO_
33_S
null
Input
-
Voltage Monitor Input 2 /
GPIO 177
VIN3/GPIO178
I/O
VDDIO_
33_S
null
Input
-
Voltage Monitor Input 3 /
GPIO 178
VIN4/GPIO179
I/O
VDDIO_
33_S
null
Input
-
Voltage Monitor Input 4 /
GPIO 179
VIN5/GPIO180
I/O
VDDIO_
33_S
null
Input
10K
PU/PD
Voltage Monitor Input 5 /
GPIO 180
VIN6/GBE_STAT3/
GPIO181
I/O
VDDIO_
33_S
null
Input
10K
PU/PD
Voltage Monitor Input 6 /
GbE Status 3 / GPIO 181
Input, PD 50K PD HD Audio Serial Data
Channel [3:0] In from Codec /
GPIO [17:167]
Pin Descriptions
65
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AMD SB820M Southbridge Databook
Default
Muxed
Function
Default
I/O
State
VDDIO_
33_S
null
Input
I/O
VDDIO_
33_S
null
Input
IR_LED#/LLB#/
GPIO184
I/O
VDDIO_
33_S
null
USB_FSD0P/
GPIO185
I/O
VDDIO
_33_S
USB
Input,
PD
15K PD USB 1.1 Port 0 Positive I/O /
GPIO 185
USB_FSD1P/
GPIO186
I/O
VDDIO
_33_S
USB
Input,
PD
15K PD USB 1.1 Port 1 Positive I/O /
GPIO 186
PS2_DAT/SDA4/
GPIO187
I/O
VDDIO_
33_S
(5-V
tolerance)
null
Input, PU 10K PU Aux PS2 Data / GPIO 187
PS2_CLK/SCL4/
GPIO188
I/O
VDDIO_
33_S
(5-V
tolerance)
null
Input, PU 10K PU Aux PS2 Clock / GPIO 188
PS2KB_DAT/
GPIO189
I/O
VDDIO_
33_S
(5-V
tolerance)
null
Input, PU 10K PU PS2 Keyboard Data / GPIO
189
PS2KB_CLK/
GPIO190
I/O
VDDIO_
33_S
(5-V
tolerance)
null
Input, PU 10K PU PS2 Keyboard Clock / GPIO
190
PS2M_DAT/
GPIO191
I/O
VDDIO_
33_S
(5-V
tolerance)
null
Input, PU 10K PU PS2 Mouse Data / GPIO 191
PS2M_CLK/
GPIO192
I/O
VDDIO_
33_S
(5V
tolerance)
null
Input, PU 10K PU PS2 Mouse Clock / GPIO 192
System Pin Name
Type
Level
VIN7/GBE_LED3/
GPIO182
I/O
GBE_LED0/
GPIO183
Integrated Functional Descriptions
Resistor
-
Voltage Monitor Input 7 /
GbE LED 3 / GPIO 182
10K PU SPI HOLD# / GbE LED 0 /
GPIO 183
Input, PU 10K PU Infrared LED / Low Low
Battery / GPIO 184
Pin Descriptions
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AMD SB820M Southbridge Databook
Default
Muxed
Function
Default
I/O
State
VDDIO_
33_S
(5-V
tolerance)
null
Input,
Tri-State
-
SMBus Clk 2 / GPIO 193
I/O
VDDIO_
33_S
(5-V
tolerance)
null
Input,
Tri-State
-
SMBus Data 2 / GPIO 194
SCL3_LV/GPIO195
I/O
0.8V
threshold,
VDDIO_
33_S
domain
null
Input,
Tri-State
-
SMBus Clock 3 for CPU TSI
/ GPIO 195
SDA3_LV/GPIO196
I/O
0.8V
threshold,
VDDIO_
33_S
domain
null
Input,
Tri-State
-
SMBus Data 3 for CPU TSI /
GPIO 196
EC_PWM0/
EC_TIMER0/
GPIO197
I/O
VDDIO_
33_S
null
Input, PU 10K PU EC PWM 0 / EC Timer 0 /
GPIO 197
EC_PWM1/
EC_TIMER1/
GPIO198
I/O
VDDIO_
33_S
null
Input, PU 10K PU EC PWM 1 / EC Timer 1 /
GPIO 198
EC_PWM2/
EC_TIMER2/
GPIO199
I/O
VDDIO_
33_S
(5V
tolerance)
null
Input, PU 10K PU EC PWM 2 / EC Timer 2 /
GPIO 199
EC_PWM3/
EC_TIMER3/
GPIO200
I/O
VDDIO_
33_S
(5-V
tolerance)
null
Input, PU 10K PU EC PWM 3 / EC Timer 3 /
GPIO 200
KSI_[7:0]/
GPIO[208:201]
I/O
VDDIO_
33_S
null
Input, PU 10K PU Scan Matrix KDB Input [7:0]
/ GPIO [208:201]
KSO_[17:0]/
GPIO[226:209]
I/O
VDDIO_
33_S
null
Input, PU 10K PU Scan Matrix KDB Output
[17:0] / GPIO [226:209]
System Pin Name
Type
Level
SCL2/GPIO193
I/O
SDA2/GPIO194
Pin Descriptions
Integrated Functional Descriptions
Resistor
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System Pin Name
AMD SB820M Southbridge Databook
Default
Muxed
Function
Default
I/O
State
VDDIO_
33_S
(5-V
tolerance)
null
Input,
Tri-State
-
SMBus Clk 1 / GPIO 227
VDDIO_
33_S
(5-V
tolerance)
null
Input,
Tri-State
-
SMBus Data 1 / GPIO228
Type
Level
SCL1/GPIO227
I/O
SDA1/GPIO228
I/O
Integrated Functional Descriptions
Resistor
General Purpose I/OD (Muxed on Flash Interface)
FC_ADQ[15:0]/
GPIOD[143:128]
I/O
1.8V
(3.3-V
tolerance)
FC
Tri-State, 10K PD Flash ADQ bit [15:00] /
PD
GPIOD [143:128]
FC_INT1/
GPIOD144
I/O
1.8V
(3.3-V
tolerance)
FC
Input, PD 10K PD Flash Interrupt 1 / GPIOD 144
FC_OE#/
GPIOD145
I/O
1.8V
(3.3-V
tolerance)
FC
Output,
Tri-State
-
Flash Output Enable# /
GPIOD 145
FC_AVD#/
GPIOD146
I/O
1.8V
(3.3-V
tolerance)
FC
Output,
Tri-State
-
Flash AVD# / GPIOD 146
FC_INT2/
GPIOD147
I/O
1.8V
(3.3-V
tolerance)
FC
Input, PD 10K PD Flash Interrupt 2 / GPIOD 147
FC_WE#/
GPIOD148
I/O
1.8V
(3.3-V
tolerance)
FC
Output,
Tri-State
-
Flash Write Enable# / GPIOD
48
FC_CE1#/GPIOD149
I/O
1.8V
(3.3-V
tolerance)
FC
Output,
Tri-State
-
Flash Chip Enable 1# /
GPIOD 149
FC_CE2#/GPIOD150
I/O
1.8V
(3.3-V
tolerance)
FC
Output,
Tri-State
-
Flash Chip Enable 2# /
GPIOD 150
4.16 Keyboard and PS/2 Controller
Note: The keyboard and PS/2 controller functions are NOT supported by the SB820M.
Keyboard and PS/2 controller pins listed below can only be used for their alternate functions.
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Table 22. Keyboard and PS/2 Controller Interface Pin Descriptions
Pin Name
Type
Voltage
Functional Description
PS2_DAT/SDA4/
GPIO187
I/O
VDDIO_33_S
Aux PS2 Data / Embedded Controller (EC) GPIO 0
PS2_CLK/SCL4/
GPIO188
I/O
VDDIO_33_S
Aux PS2 Clock / EC GPIO 1
PS2KB_DAT/
GPIO189
I/O
VDDIO_33_S
PS2 Keyboard Data / EC GPIO 4
PS2KB_CLK/
GPIO190
I/O
VDDIO_33_S
PS2 Keyboard Clock / EC GPIO 5
PS2M_DAT/
GPIO191
I/O
VDDIO_33_S
PS2 Mouse Data / EC GPIO 6
PS2M_CLK/
GPIO191
I/O
VDDIO_33_S
PS2 Mouse Clock / EC GPIO 7
EC_PWM0/
EC_TIMER0/
GPIO197
I/O
VDDIO_33_S
EC PWM 0 / EC Timer 0 / GPIO 197
EC_PWM1/
EC_TIMER1/
GPIO198
I/O
VDDIO_33_S
EC PWM 1 / EC Timer 1 / GPIO 198
EC_PWM2/
EC_TIMER2/
GPIO199
I/O
VDDIO_33_S
EC PWM 2 / EC Timer 2 / GPIO 199
EC_PWM3/
EC_TIMER3/
GPIO200
I/O
VDDIO_33_S
EC PWM 3 / EC Timer 3 / GPIO 200
KSI_[7 :0]/
GPIO[208 :201]
I/O
VDDIO_33_S
Scan Matrix KDB Input [7 :0] / GPIO [208 : 201]
KSO_[17 :0]/
GPIO[226 :209]
I/O
VDDIO_33_S
Scan Matrix KDB Output [17 :0] / GPIO [226 : 209]
4.17 Gigabit Ethernet Media Access Controller (GbE
MAC)
Note: The GbE Mac function is NOT supported by the SB820M. The alternative functionality of
these pins, such as GPIO, will still be supported. The pins on the GbE Mac interface should be
connected as described in the AMD SB800-Series Southbridges Schematic Review Checklist.
Pin Descriptions
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Table 23. RGMII/MII Pin Descriptions
Pin Name
Type
Voltage
Functional Description
GBE_COL
I
VDDIO_33_S
MII Collision
GBE_CRS
I
VDDIO_33_S
MII Carrier Sense
GBE_MDCK
O
VDDIO_33_S
PHY Serial Management Interface Clock
GBE_MDIO
I/O
VDDIO_33_S
PHY Serial Management Interface Data
GBE_RXCLK
I
GBE_VDDIO
RGMII or MII Receive Clock
GBE_RXD[3:0]
I
GBE_VDDIO
RGMII or MII Receive Data
GBE_RXCTL/
RXDV
I
GBE_VDDIO
RGMII Receive Control or MII Receive Data Valid
GBE_RXERR
I
VDDIO_33_S
MII Receive Error
GBE_TXCLK
I/O
GBE_VDDIO
RGMII or MII Transmit Clock (RGMII = Output, MII
= Input)
GBE_TXD[3:0]
O
GBE_VDDIO
RGMII or MII Transmit Data
GBE_TXCTL/TXEN
O
GBE_VDDIO
RGMII Transmit Control or MII Transmit Enable
Table 24. Gigabit Ethernet PHY Pin Descriptions
Pin Name
Type
Voltage
Functional Description
GBE_PHY_PD
O
VDDIO_33_S
PHY Power Down
GBE_PHY_RST#
O
VDDIO_33_S
PHY Reset
GBE_PHY_INTR
I
VDDIO_33_S
PHY Interrupt
GBE_LED0/
GPIO183
O
VDDIO_33_S
LAN LED0 Control / GPIO 183
GBE_LED1/
GEVENT9#
O
VDDIO_33_S
LAN LED1 Control / General Event 9
GBE_LED2/
GEVENT10#
O
VDDIO_33_S
LAN LED2 Control / General Event 10
VIN7/GBE_LED3/
GPIO182
O
VDDIO_33_S
Voltage Monitor Input 7/ LAN LED3 Control/ GPIO
182
GBE_STAT0/
GEVENT11#
I
VDDIO_33_S
PHY status0/ General Event 11
SPI_CS3#/
GBE_STAT1/
GEVENT21#
I
VDDIO_33_S
SPI chip select2#/ PHY status2/ GPIO 166
SPI_CS2#/
GBE_STAT2/
GPIO166
I
VDDIO_33_S
SPI chip select3# / PHY status1/GEVENT 21
Pin Descriptions
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Pin Name
AMD SB820M Southbridge Databook
Type
VIN6/GBE_STAT3/
GPIO181
I
Voltage
Functional Description
VDDIO_33_S
Voltage Monitor Input 6 / PHY status 3/GPIO 181
4.18 Infrared Interface
Table 25. Infrared Interface Pin Descriptions
Pin Name
Type
Voltage
Functional Description
USB_OC4#/
IR_RX0/
GEVENT16#
I/O
VDDIO_33_S
USB Over Current 4# / Infrared Receive 0 /
GEVENT16#
Infrared Receive 0. Connection to wideband
Consumer Infrared (CIR) receiver.
IR_RX1/
GEVENT20#
I/O
VDDIO_33_S
Infrared Receive 1 / General Event 20
Infrared Receive 1. Connection to long-range CIR
receiver.
USB_OC5#/
IR_TX0/
GEVENT17#
I/O
VDDIO_33_S
USB Over Current 5# / Infrared Transmit 0 /
GEVENT17#
USB_OC6#/
IR_TX1/
GEVENT6#
I/O
VDDIO_33_S
USB Over Current 6# / Infrared Transmit 1 /
GEVENT6#
VDDIO_33_S
Infrared LED / Low Low Battery / GPIO 184
IR_LED#/LLB#/
GPIO184
I/O
The following are the possible configurations for CIR
No CIR:
CIR not used
CIR RX with TX0:
One RX pin used with TX0
CIR RX with TX1:
One RX pin used with TX1
CIR RX with TX0 and TX1:
One RX pin used with TX0 and TX1
RX can be RX0 or RX1 except when using wideband CIR, in which case both RX pins
need to be used.
4.19 Power and Ground
See Table 52 for the states of the power rails during each ACPI state.
Pin Descriptions
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Table 26. Power and Ground Pin Descriptions
Signal Name
Note Description
Voltage GND
/GND
reference
VDDCR_11_[9:1]
1.1V
VSS
-
Core power
VDDIO_33_PCIGP
[12:1]
3.3V
VSS
-
IO power
VDDIO_18_FC_[4:1]
1.8V
VSS
-
Flash Controller 1.8V IO power.
Note: Flash controller function is not
supported by the SB820M.
VDDIO_AZ_S
1.5V/
3.3V
VSS
-
HD Audio Interface IO power
VDDIO_GBE_S[2:1]
-
-
-
Connect to ground
VDDIO_33_GBE_S
-
-
-
Connect to ground
VDDRF_GBE_S
-
-
-
Connect to ground
VDDCR_11_GBE_S
[2:1]
-
-
-
Connect to ground
VDDCR_11_S_[2:1]
1.1V
VSS
-
S5 core power
VDDIO_33_S_[8:1]
3.3V
VSS
-
S5 IO power
VDDXL_33_S
3.3V
VSSXL
1
25MHz XTAL IO power
VDDPL_33_SYS
3.3V
VSSPLL_
SYS
2
System Clock Generator PLLs analog power
VDDPL_11_SYS_S
1.1V
VSSPL_S
YS
2
System Clock Generator PLLs analog power
VDDAN_11_CLK_
[8:1]
1.1V
VSSIO_P
CIECLK
2
System Clock Generator analog/output
power
VDDPL_33_PCIE
3.3V
VSSIO_P
CIECLK
2
A-Link Express II /PCI Express® PLL
power
VDDAN_11_PCIE_
[8:1]
1.1V
VSSIO_P
CIECLK
2
A-Link Express II / PCI Express analog
power
VDDPL_33_SATA
3.3V
VSSIO_S
ATA
2
SATA PHY PLL power
VDDAN_11_SATA_
[7:1]
1.1V
VSSIO_S
ATA
2
SATA PHY analog/IO power
VDDBT_RTC_G
2.5 3.6V
BAT
VSS
-
RTC/CMOS backup power
Pin Descriptions
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Signal Name
AMD SB820M Southbridge Databook
Note Description
Voltage GND
/GND
reference
VDDPL_33_USB_S
3.3V
VSSIO_U 2, 3, USB PHY PLL analog power
SB
5
VDDAN_33_USB_S_
[12:1]
3.3V
VSSIO_U 2, 3, USB PHY analog/IO power
SB
5
VDDAN_11_USB_S_
[2:1]
1.1V
VSSIO_U 2, 3, USB PHY DLL analog power
SB
6
VDDCR_11_USB_S_
[2:1]
1.1V
VSSIO_U 3, 6 USB PHY core power
SB
VDDAN_33_HWM_S
3.3V
VSSAN_
HWM
-
Hardware Monitor Interface analog/IO
power
VSS_[52:1]
GND
-
-
Digital ground (plane)
VSSXL
GND
VSSPL_SYS
GND
25MHz XTAL ground
-
-
System Clock Generator PLLs common
ground
A-GND -
-
A-Link Express II / PCI Express/ System
Clock Generator analog ground (plane)
VSSIO_SATA_[19:1] A-GND -
-
SATA analog ground (plane)
VSSIO_PCIECLK_
[27:1]
VSSIO_USB_[28:1]
A-GND - USB PHY analog ground (plane)
Note 1: These power rails can be tied to S0-S5 or S0-S3 (So-S2 in case of VDDXL_33) depending on
whether WakeOnLan is supported.
Note 2: These power rails should be filtered.
Note 3: These power rails can be tied to S0-S5 or S0-S3 power depending on whether wake from S4/S5
is supported or not.
Note 5: VDDPL_33_USB_S and VDDAN_33_USB_S_[12:1] should be sourced from the same
voltage regulator and have traces routed close together to minimize voltage droop difference.
Note 6: VDDAN_11_USB_S_[2:1] and VDDCR_11_USB_S_[2:1] should be sourced from the
same voltage regulator and have traces routed close together to minimize voltage drop difference.
4.20
Integrated Resistors
Table 27 lists pins that have integrated resistors on their pads. The table does NOT include
information for any GPIO or GEVENT pins, for which one should refer to Table 21 in Section
4.15, “General Purpose I/O and General Event.” In general, the integrated resistors are enabled
by default, but can be disabled by programming.
Pin Descriptions
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Table 27. Integrated Resistors
Interface
LPC
RTC
Pin
Resistor Type
LAD[3:0]
15-K pull-up
LDRQ0#
15-K pull-up
CLKRUN#
8.2-K pull-up
DEVSEL#
8.2-K pull-up
FRAME#
8.2-K pull-up
GNT3#
8.2-K pull-up
IRDY#
8.2-K pull-up
LOCK#
8.2-K pull-up
PERR#
8.2-K pull-up
REQ0#
15-K pull-up
SERR#
8.2-K pull-up
STOP#
8.2-K pull-up
TRDY#
8.2-K pull-up
RTCCLK
10-K pull-up
INTRUDER_ALERT#
50-K pull-up
PWR_BTN#
Power
Management PWR_GOOD
Reset
ATE/JTAG
4.21
10-K pull-up
10-K pull-up
RSMRST#
10-K pull-up (cannot be disabled)
TEST0
10-K pull-down
TEST1/TMS
10-K pull-down
TEST2
10-K pull-down
Strap Information
Two types of straps are captured on the rising edge of RSMRST# and PWR_GOOD—Type I
and Type II. Type I straps become valid immediately after capture on the rising edge of
RSMRST#. Modules in the S5 power well use this type of straps, which are captured only once
when power is first applied to the chip. All other straps (type II) become valid after
PWR_GOOD is asserted in order to prevent the strap logic that resides in the standby power well
from being driven by un-powered logic. Type II straps are captured every time the system
powers up from the S5 state. A transition from S3 to S0 does not trigger capture.
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Straps I
Capture
S5_1.1V
RSMRST#
Don't care
Straps (board)
Straps I
Straps II
VDD
Straps II
Capture
PWRGOOD
Undefined
Straps Type I
Straps Type I
Straps Type II
Straps Type II
Ts
T
Ts
Th
Parameter
Setup Time for capture
Hold Time for capture
Min
0
Max
1310.5
Th
Unit
ns
ns
Figure 13. Straps Capture Timing
Straps are also classified into two groups—standard and debug. Standard straps are required for
selecting different chip options at power-up. Debug straps are used for debugging purposes only
and do not require population for production boards. However, provisions for connecting pullups or pull-downs on the debug strap signals should be made if they are not used for normal
system operation.
Table 28 and Table 29 show the function of every strap signal in the design. All straps are
defined such that in the most likely scenario of operation, they will be set to the recommended
(or safest) values by default. The values shown in the Description column are the external board
strap values, with 3.3V being a pull-up and 0V a pull-down.
Table 28. Standard Straps
Ball Name*
Strap Name
LPCCLK0
ECEnableStrap
Type
I
Default
Description
Value
-
Embedded Controller (EC)
0V – Disabled
3.3V – Enabled
Pin Descriptions
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Ball Name*
Strap Name
EC_PWM3,
EC_PWM2
{ROMTYPE_1,
ROMTYPE_0 }
AMD SB820M Southbridge Databook
Type
I
Default
Description
Value
-
ROMTYPE_1
3.3V
3.3V
0V
0V
ROMTYPE_0
0V
3.3V
0V
3.3V
ROM Type
SPI ROM
Reserved
Reserved
LPC ROM (supports
both LPC and PMC
ROM types)
Configure these two strap pins to the corresponding
state that matches the hardware ROM type installed.
LPCCLK1
CLKGEN
II
-
Defines clock generator.
0V – External clock mode: Use 100MHz PCIe®
clock as reference clock and generate internal clocks
only.
3.3V – Integrated clock mode: Use 25MHz crystal
clock and generate both internal and external clocks.
PCICLK1
BIF_GEN2_COM
PLIANCE_Strap
II
-
Set PCIe to Gen II mode.
0V – Force PCIe interface at Gen I mode.
3.3V – PCIe interfacce is at Gen II mode.
Not Applicable to SB820M – Leave provision for
PD.
PCICLK2
BootFailTmrEn
II
-
Watchdog function
0V – Disable the boot fail timer function.
3.3V – Enable the boot fail timer function.
PCICLK3
DefaultStrapMode
II
-
Default Debug Straps
0V – Disable Debug Straps.
3.3V – Select external Debug Straps (see
Table 29).
PCICLK4
CPUClkSel
II
-
CPU/NB HT Clock Selection
0V – Reserved
3.3V – Required setting for integrated clock mode
This strap is not used if the strap CLKGEN is
configured for external clock generator mode.
Pin Descriptions
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Ball Name*
Strap Name
AZ_SDOUT CoreSpeedMode
AMD SB820M Southbridge Databook
Type
II
Default
Description
Value
-
Slow down core clock for low power platform.
0V – Required setting (performance mode)
3.3 V – Reserved (as low power mode is not
supported)
* Note: For clarity’s sake, ball names for strap pins given in this table are truncated to show
only the beginning parts. Refer to the pins lists in Appendix A for the complete ball names.
Table 29. Debug Straps
Type
Default
Value
Ball Name
Strap Name
Description
AD27
PciPllByp
II
3.3V
(Intern
al PU
of
15kΩ)
Bypass PCI PLL (used in functional test at tester)
0V– Bypass internal PLL clock.
Use xSPciReqB_1_ as SPCI33 bypass clock.
Use xSPciReqB_2_as A-Link bypass clock.
Use xSPciGntB_1_as B-Link bypass clock.
Use xSPciGntB_0_ as B-Link266 bypass
clock.
3.3V – Use internal PLL-generated PLL CLK.
AD26
ILAAutorunEnB
II
3.3V
(Intern
al PU
of
15kΩ)
ILA auto run Enable
0V – ILA auto run enable
3.3V – ILA auto run disable
AD25
FCClkByP
II
-
Bypass FC CLK
0V – Bypass internal FC Clk (used in functional
test at tester).
Use xSPciReqB_0_ as FC 1xClk bypass
clock.
Use xSPciGntB_2_ as FC 2xClk bypass
clock.
3.3V – Use internal PLL FC Clk.
.
AD24
I2CRomEn
II
3.3V
(Intern
al PU
of
15kΩ)
I2C ROM enable. Load the settings for A-Link
Express/PLL/ misc control from I2C ROM.
0V – Getting the value from I2C EPROM.
I2C EPROM ADDRESS set to all zeroes.
Use REQ3# as SDA.
Use GNT3# as SCL.
3.3V – Disable I2C ROM
Pin Descriptions
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Ball Name
Strap Name
Type
AD23
PCI_ROM_
BOOT
II
Default
Value
3.3V
(Intern
al PU
of
15kΩ)
Description
Enable ROM Straps to select ROM type
0V – Reserved **
3.3V – Required setting (use ROMTYPE straps to
determine the ROM type)
**Note: Strap option was originally for booting
from PCI memory; the feature is not supported, as
it has not been productized.
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Chapter 5
Power Sequence and Timing
This chapter describes the power-on sequence and other timing data, for the SB820M Southbridge.
5.1
Power Sequence
G3
S5
S0
S5
G3
Wake Event
PWR_BTN#
WAKE#
T13
SLP_S5#/
SLP_S3#
VBA
T
VBAT
RTC clock In
T2
+3.3V_S5
T1
1.1V_S5
T2B
(See Note 1)
RSMRST#
S5 STRAPS
T3
RTCCLK out
PS PWOK
T13A
S0 power rails
System clocks
(See Note 1 & 2)
T4
T7A
SB PWRGOOD
T7B
T7
NB_PWRGD
T8D
LDT_PG
(See Note 6)
S0 STRAPS
T9A
A_RST#
T8B
(See Note 5)
KBRST#
T8A
T9
PCIRST#
LDT_RST#
(See Note 4)
T8C
T11A
T10
PCIE_RCLKP/N
T11
PCICLK[4:0]
ALLOW_LDTSTP
LDT_STP#
(Note 8)
(Note 11)
T9B
Figure 14. Power-on Sequence (S5  S0 S5)
Power Sequence and Timing
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S3
S0
S3
Wake Event
PWR_BTN#
WAKE#
T13
SLP_S3#
SLP_S5#
GND
VBA
T
VBAT
RTC clock
GND
+3.3V_S5
GND
+1.1V_S5
GND
RSMRST#
GND
PS PWOK
T13A
S0 power rails
System clocks
(See Note 1 & 2)
T7A
SB PWRGOOD
T7B
T7
NB_PWRGD
T8D
LDT_PG
T9A
A_RST#
T8B
(See Note 5)
KBRST#
T8A
T9
PCIRST#
LDT_RST#
(See Note 4)
T8C
T11A
T10
PCIE_RCLKP/N
T11
PCICLK[4:0]
ALLOW_LDTSTP
LDT_STP#
(Note 8)
T9B
Figure 15. Power-on Sequence (S3  S0 S3)
Power Sequence and Timing
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Table 30. Power Sequence Timing
T1
T2
Min.
Note 1
10 ms
T2B
(See Description)
T2A
T3
–
16 ms
50 ms
–
T4
–
50 ns
50 ms
1 ms
100 ns
A_RST# (PCI host bus reset) to PCIRST#.
T8B
T8C
T8D
T9
T9A
T9B
–
–
0 ns
Note 4
–
1.0 ms
77 ms
101 ms
101 ms
31 ms
Description
+3.3V_S5 to +1.1V_S5
+3.3V_S5 to resume reset (RSMRST#).
+1.1V_S5 should ramp up to nominal voltage before resume reset
(RSMRST#) is de-asserted.
Resume reset (RSMRST#) rise time (10% to 90%). See Note 11.
RSMRST# de-asserted to start of RTCCLK output from the SB.
SB PWR_GOOD de-assertion to NB_PWRGD de-assertion
delay.
See Table 31 and Table 32 below.
SB PWR_GOOD rise time (10% to 90 %). See Note 3.
SB PWR_GOOD fall time.
Note 5
2.3 ms
108 ms
113 ms
113 ms
–
T10
-31 ms
–
T11
36 ms
41 ms
–
15 ns
200 ns
–
8 ns
--
T13A
80 ns
–
T14
1 ns
–
T15
5s
–
T16A
T16B
40 µs
4 µs
–
–
KBRST# to SB PWR_GOOD.
PCIRST# to LDT_RST#.
NB_PWRGD to LDT_PG.
SB PWR_GOOD to PCIRST#.
SB PWR_GOOD to A_RST# (T9-T8A).
SB PWR_GOOD to LDT_STP#. See Note 12.
PCIE_CLKP/N stable time before SB PWRGOOD assertion (for
external clock mode only).
SB PWR_GOOD to stable PCICLK 33 MHz. See Note 8.
Wake Event (except PwrButton) to SLP_S3# / SLP_S5# deassertion.
Wake Event (PwrButton) to SLP_S3# / SLP_S5# de-assertion
(S5/S4/S3  S0)
Wake Event (PwrButton) to SLP_S3# / SLP_S5# de-assertion
(G3  S5  S0)
SB PWR_GOOD must be de-asserted before VDD (PS PWOK)
drops more than 5% off the nominal value. See Note 9.
SB PWR_GOOD de-assertion to Resume Reset (RSMRST#)
assertion. See Note 10.
[Not illustrated] VBAT to +3.3V_S5 to +1.1V_S5. Must be
greater than 5 seconds to allow start time for the internal RTC.
[Not illustrated] LDT_STP# assertion to LDT_RST# assertion.
[Not illustrated] LDT_RST# assertion to SLP_S3# assertion.
T7
T7A
T7B
T8A
T13
Max.
–
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Table 31. Power Sequence SB PWRGOOD, NB_PWRGOOD, and System Clock Timing
(For Internal Clock Mode Only)
Symbol
Min.
Max.
T7
40ms
42ms
T11A
-
38 ms
T11B
-
32 ms
T8D
58 ms
108 ms
Description
SB PWRGOOD assertion to NB_PWRGD assertion delay.
Note: This timing only applies to the NB_PWRGD signal
generated from SB820M.
SB PWRGOOD to stable system clocks (CPU, PCI-E, NB_DISP)
when the SB’s clock function is enabled to provide all system
clocks.
[Not illustrated] SB PWRGOOD to clock out (clocks are not
stable at this point).
NB_PWRGD to LDT_PG.
Table 32. Power Sequence SB PWRGOOD, NB_PWRGD, and System Clock Timing (For
External Clock Mode Only)
Symbol
Min.
Max.
Description
T7
0ns
30ns
SB PWRGOOD assertion to NB_PWRGD assertion delay when
using the SB820M NB_PWRGD output.
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Power up Sequence Timing Notes
Note 1: There are no specific power sequencing requirements. The SB820M power rails are
grouped in four different voltages:
+3.3 V, which includes VDDIO_33_PCIGP, VDDIO_AZ_S, VDDAN_33_USB_S_1, and
VDDPL_33_PCIE, VDDPL_33_SATA rails.
II. +1.1 V, which includes VDDAN_11_CLK, VDDAN_11_SATA, VDDAN_11_PCIE,
VDDCR_11
III. +1.8 V which includes VDDIO_18_FC_1
I.
The three groups of power rails can be powered up independently without any required
relationship between them. The rails within the same group should be powered up at the same
time.
Although there are no power-rail sequencing requirements between any specific power-rail
groups (except for VBAT—see Note 13 below), customers can use the power rail power-up
sequence given in Ch.5 of the AMD SB800-Series Southbridges Motherboard Design Guide as
a reference. All AMD SB800-series reference platforms are designed to follow that reference
power-up sequence.
Note 3: The SB will latch the straps after rising edge of SB PWR_GOOD only once. With debouncing of SB PWR_GOOD, the latching of strap will occur at approximately ~10ms after
the rising edge of SB PWR_GOOD.
Note 4: Typical time between A_RST# and PCIRST# is 75 ns. The measurement should be
done at 10% of both signals. Loading on the motherboard may cause the measurement at 90%
be more than the spec.
Note 5: The KBRST# should be de-asserted before SB PWR_GOOD is asserted.
Note 6: Type II Standard and Debug straps will be latched after SB PWR_GOOD is asserted.
Type I straps are latched on resume reset rising edge.
Note 7: The SB will not monitor the ALLOW_LDTSTP signal on power up. This signal is
only used on C3 transitions.
Note 8: The PCI Clock may be stable before T11 min. under some conditions; however in all
cases, the PCI Clock is guaranteed to be stable only between T11 min. and max.
Note 9: The SB will monitor internally the power down events and protect the internal circuit
during the power down event. This includes power down during the S3, S4, and S5 states.
During an unexpected power failure or G3 state, the relationship between the 1.1 V (VDDCR)
and SB Power Good should be maintained to protect the internal logic of the SB820M.
Note 10: The following figure shows the timing of SB PWR_GOOD de-asserted to RSMRST#
de-asserted during a power down sequence. However, this timing only applies to S0 to G3
state transition, because G3 state is where both signals are inactivated.
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SB PWR_GOOD
RSMRST#
T14
S0 to G3
Figure 16. Timing for SB PWR_GOOD De-asserted to RSMRST# De-asserted
Note 11: When measuring the RSMRST# timing T2A, the loading of the motherboard PCB
trace may cause a slow rise time, which should be taken in account. See Figure 17 below.
S5_3.3V
RSMRST#
T2A
Figure 17. Measurement for RSMRST# Timing (T2A)
Note 12: On first power up, G3  S5 transition, or after RSMRST# assertion, LDT_STP#
will be asserted together with CPU_VDDIO power. On subsequent power up or S5  S0
transition, the timing requirement on T9B will apply. See Figure 18.
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CPU_VDDIO
LDT_STP#
Timing is system
dependent
SB PWRGOOD
Figure 18. LDT_STP# Timing at First power-up, G3G5, or after RSMRST# Assertion
Note 13: VBAT powers the RTC clock input to the SB. The RTC clock must be functional before deassertion of RSM_RST#. To control this, the VBAT ramp-up time relative to RSM_RST# may need
to be controlled. Typical start time varies with different crystals, with most specifications giving a
value of 5 seconds.
5.2
Reset Timing
The SB controls the system reset signal timings, which are provided in this section.
5.2.1
ROMRST#
ROMRST# is used for resetting the LPC system ROM. The SB generates ROMRST# and
controls the required timing for this signal. Depending on the system configuration, the timing of
ROMRST# may be referenced to RSMRST# or A_RST#. Enabling the Embedded Controller
(EC) will force the SB to deassert ROMRST# with respect to RSMRST#. This allows the EC to
access the ROM before the system access cycle begins.
The ROMRST# timing is shown with respect to RSMRST# and A_RST# in Figure 19 (a) and
(b), and Table 33 indicates the figure and the timing value that are applicable to each platform
configuration.
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RSMRST#
A_RST#
ROMRST#
ROMRST#
Tr1
Tr1
(a)
(b)
Figure 19. ROM Reset Timing
Table 33. Rom Reset Timing for Various Platform Configurations
Tr1 Timing
EC
Enabled
ROM Reset
Timing
Figure
Min.
Typ.
Max.
Y
Figure 19 (a)
-
32 ms
-
N
Figure 19 (b)
-
-
100 ns
5.2.2
System Reset
The SB takes SYS_RST# as an input signal for forcing a cold boot. SYS_RST# functions
similarly as RSMRST#: both pins are input to the SB and are generated on the system board.
Figure 20 illustrates the timing of APU_RST#, APU_PG, A_RST#, and PCI_RST# with respect
to the SYS_RST# signal when SYS_RST# is used to force a system reset. Table 34 shows the
values of the timing labels Tr3 to Tr6.
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SYS_RST#
LDT_RST#
LDT_PG
Tr3
Tr4
A_RST#
PCI_RST#
Tr5
Tr6
Figure 20. System Reset Timing
Table 34. System Reset Timing
Symbol
Tr3
Description
SYS_RESET# assertion to LDT_RST# assertion
Timing
8 ms typical
SYS_RESET# assertion to LDT_PG de-assertion
8 ms typical
Tr4
SYS_RESET# deassertion to A_RST# de-assertion
230 ms typical
Tr5
SYS_RESET# assertion to A_RST# assertion
8.05 ms typical
SYS_RESET# assertion to PCI_RST# assertion
8.1 ms typical
SYS_RESET# deassertion to PCI_RST# deassertion
231 ms typical
Tr6
5.2.3
PCIe® Reset
PCIe® reset is controlled by the SB PCIE_RST# pin, which resets the GPP lanes on both the NB
and the SB. Figure 21 illustrates the PCIe reset timing, and Table 35 shows the timing value.
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PCIE_RST#
PCIe LINK ACTIVE
TR7
Figure 21. PCIe® Reset Timing
Table 35. PCIe® Reset Timing
Symbol
Tr7
Description
PCIE_RST# deasserted to PCIe® link active
Power Sequence and Timing
Timing
20 ms max
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Power Button Timing
Figure 22 below illustrates various timing values related to the assertion and deassertion of the
power button.
3.3V_S5 / 1.1V_S5
10 ms min
RSM_RST#
10 ms min
PWR_BTN#
16 ms min ( See Note)
200 ns min
SLP_S3# / SLP_S5#
Note: The 16 ms includes requirement for 15 ms
of de-bounce timing. De-bounce logic is internal
to the SB.
Figure 22. Power Button Timing
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5.4
ACPI Timing
5.4.1
S-State Timing
5.4.1.1
S1 and S2 Timing
software initiate
sleep here
STPCLK#
CPU-NB->
NB-SB
Assertion
msg sent here
Deassertion
msg sent here
STPGNT msg
received here
T1
T12
SUS_STAT#
LDT_STP#
T6
T7
wake-up
event
S0 to S1 and S1 to S0 transition
Figure 23. S1-State Timing
Refer to Table 36 for definitions of the timing labels.
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S3 Timing
software initiate
sleep here
STPCLK#
CPU-NB->
NB-SB
Assertion
msg sent here
STPGNT msg
received here
T1
SUS_STAT#
T11
T10
LDT_STP#
T5
S3_STATE
CPU_STP#/PCI_STP#
CPU_STP# Can be programmed to
and/or
PCI_STP#
be asserted or not to be
asserted in S3
wake-up
event
T3
T8
PCIRST#
T4
SLP_S3#
T5
T5B
T5
PWR_GOOD
T9B
LDT_RST#
T9A
LDT_PG
S0 to S3 and S3 to S0 transition
Note: S3_STATE is asserted within 100ns after the completion of the sleep command
Figure 24. S3 State Timing
Refer to Table 36 for definitions of the timing labels.
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S4 and S5 Timing
software initiate
sleep here
STPCLK#
CPU-NB->
NB-SB
Assertion
msg sent here
STPGNT msg
received here
T1
SUS_STAT#
T11
LDT_STP#
CPU_STP#
and/or
PCI_STP#
CPU_STP#/PCI_STP#
Can be programmed to
be asserted or not to be
asserted in S3
T10
T3
wake-up
event
T8
PCIRST#
T4
T5
SLP_S3#
SLP_S5#
PWR_GOOD
T9B
LDT_RST#
T9A
LDT_PG
S0 to S4/5 and S4/5 to S0 transition
Figure 25. S4 and S5 State Timing
Refer to Table 36 for definitions of the timing labels.
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5.4.3
C-State Timing
5.4.3.1
C2 and C3 Timing
software initiate
LVL2/3 read here
STP_CLK#
Assertion
msg sent here
Deassertion
msg sent here
CPU-NB->
NB-SB
STPGNT msg
received here
C2 wake-up
event
C3 wake-up
event
AGPSTP#
if enabled
Assertion
msg sent here
T14
T15
Deassertion
msg sent here
T16
T17
LDT_STP#
(C3 only)
ALLOW_LDTSTOP = 1
C0 to C2/C3 and C2/C3 to C0 transition
Figure 26. C2/C3-State Timing
Refer to Table 36 for definitions of the timing labels.
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C3 Timing Transition into Stutter Mode
software initiate
LVL3 read here
STPCLK#
Assertion
msg sent here
CPU-NB->
NB-SB
Deassertion
msg sent here
STPGNT msg
received here
C3 wake-up
event
AGPSTP#
if enabled
Assertion
msg sent here
T14
T15
Deassertion
msg sent here
T18
T15
T18
T15
T16+T17
LDT_STP#
ALLOW_LDTSTOP
C0 to C3 and C3 to C0 Transition in Stutter Mode
Figure 27. C3 Stutter Mode Timing
Refer to Table 36 for definitions of the timing labels.
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VID/FID Change Timing
software initiate
VID/FID change or LdtStpCmd here
STPCLK#
Assertion
msg sent here
CPU-NB->
NB-SB
AGPSTP#
if enabled
Deassertion
msg sent here
STPGNT msg
received here
Deassertion
msg sent here
Assertion
msg sent here
T14
T19
T16
T17
LDT_STP#
ALLOW_LDTSTOP = 1
VID/FID change
Figure 28. VID/FID Change Timing
Refer to Table 36 for definitions of the timing labels.
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RESET
AgpEndTime - PM IO 8Ah [3:2]
(0/1/32/64us) additional delay
before AGPSTOP deassertion
LdtEndTime - PM IO 8Ah [1:0]
(0/1/32/64us) delay before
LDTSTOP deassertion
STPCLK Deassertion
Message Sent
IDLE
Wait for
Trigger
FID, LdtStpCmd or
C2/3 State Trigger,
STPCLK Assertion
Message Sent
AgpStartTime - PM IO 89h
(0-255us) delay before
AGPSTOP assertion and 1st
LDTSTOP assertion
LdtStartTime - PM IO 88h
(0-255us) delay before
subsequent LDTSTOP
assertion in stutter mode
Timer Expired || C2
ST 7
Wait for LdtEndTime +
AgpEndTime
ST 1
Wait for STPGNT
C2
FID || break_event
C3_stutter && !break_event
ST 6
Wait for Break Event if
C2 or C3_normal;
Deassert LDTSTOP if
C3_stutter
ST 2
Wait for AgpStartTime
st
at 1 occurrence of ST2
or else LdtStartTime
C3 && break_event && break_enable
Timer Expired &&
ALLOW_LDTSTOP
Timer Expired && (FID ||
C3_normal || break_event)
!ALLOW_LDTSTOP ||
break_event
FID || C3
ST 5
Check
ALLOW_LDTSTOP
ST 4
Wait for VidFidTime if
FID; Wait for
StutterTime if C3
Timer Expired &&
C3_stutter &&
!break_event
ST 3
ASSERT_LDTSTOP
VidFidTime - PM IO 8Ah [6:4]
(1/2/4/8/16/32/64/128us)
StutterTime - PM IO 8Bh
(0-255us)
Figure 29. C-State and VID/FID Change Flow Diagram
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AMD SB820M Southbridge Databook
Timing Definitions and Descriptions
Table 36. Timing Definitions and Descriptions
Time
Min
Typ
Max
Unit
Time Description
T1
120
128
140
µs
STPGNT message to SUS_STAT# assertion
Figure 23,
Figure 24,
Figure 25
T3
35
40
45
µs
LDT_STP# assertion to PCIRST# assertion
Figure 24,
Figure 25
T4
4
-
5
µs
PCIRST# assertion to SLP_S3# or SLP_S5#
assertion
Figure 24,
Figure 25
T5
500
-
-
ms
SLP_S3# or SLP_S5# assertion for minimum
time
Figure 24,
Figure 25
T5B
T1+T2+T3
+T4
-
-
-
S3_STATE assertion to SLP_S3# assertion
Figure 24
T5C
T10+T11+
T5D
-
-
-
PWR_GOOD assertion to S3_STATE deassertion
Figure 24
T5D
0
-
0.5
µs
SUS_STAT# de-assertion to S3_STATE deassertion
Figure 24
T6
44
-
-
µs
LDT_STP# assertion to wake event minimum
time
Figure 23
T7
0.5
40
500
µs
wake event to LTD_STP# de-assertion
Figure 23
T8
-
52
-
ms
PWR_GOOD assertion to PCIRST# de-assertion
Figure 24,
Figure 25
T9A
99
-
108
ms
PWR_GOOD assertion to LDT_PG assertion
Figure 24,
Figure 25
T9B
103.9
-
115.3
ms
PWR_GOOD assertion to LDT_RST# deassertion
Figure 24,
Figure 25
T10
-
32
-
ms
PWR_GOOD asserted to LDT_STP# deassertion
Figure 24,
Figure 25
T11
8
104
1000
µs
LDT_STP# de-assertion to SUS_STAT# deassertion
Figure 24,
Figure 25
T14
0
-
255
µs
AGP Start time
Figure 26,
Figure 27,
Figure 28
Power Sequence and Timing
Figure
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Time
Min
AMD SB820M Southbridge Databook
Typ
Max
Unit
Time Description
Figure
T15
1
-
255
µs
Minimum LDT_STP# assertion time
Figure 26,
Figure 27
T16
0
-
64
µs
LDT_STP# End time
Figure 26,
Figure 27,
Figure 28
T17
0
-
64
µs
AGP End time
Figure 26,
Figure 27,
Figure 28
T18
0
-
255
µs
Minimum LDT_STP# de-assertion time also
determined by ALLOW_LDTSTOP
Figure 27
T19
2
-
128
µs
HT-Link disconnect time
Figure 28
Table 37. C3 Enter (Shaded)/Exit
Time
Min
Typ
Max
Unit
T2
-
-
255
µs+T1
-
T12
0
0
18
µs
Time Description
STPGNT# message to LDT_STP# assertion
LDT_STP# de-assertion to STPCLK# deassertion message
Figure
Figure 23
Table 38. C3 Stutter Enter (Shaded)/Exit
Time
Min
Typ Max
Unit
T2
-
-
255
µs+T1
-
T12
0
0
18
µs
Time Description
STPGNT# message to LDT_STP# assertion
LDT_STP# de-assertion to STPCLK# deassertion message
Figure
Figure 23
Table 39. LdtCmd Enter (Shaded)/Exit
Time
Min
Typ Max
Unit
T2
-
-
255
µs+T1
-
T12
0
0
18
µs
Time Description
STPGNT# message to LDT_STP# assertion
LDT_STP# de-assertion to STPCLK# deassertion message
Power Sequence and Timing
Figure
Figure 23
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Table 40. S1 Enter (Shaded)/Exit
Time
Min
Typ
Max
Unit
Time Description
T1
120
128
140
µs
STPGNT message to SUS_STAT# assertion
Figure 23,
Figure 24,
Figure 25
T2
-
-
255
µs+T1
-
STPGNT# message to LDT_STP# assertion
-
T12
0
0
18
µs
LDT_STP# de-assertion to STPCLK# deassertion
Figure
Figure 23
Table 41. S3 Enter (Shaded)/Exit
Time
Min
Typ
Max
Unit
Time Description
Figure
T1
120
128
140
µs
STPGNT# assertion to SUS_STAT# assertion
Figure 23,
Figure 24,
Figure 25
T11
8
104
1000
µs
LDT_STP# de-assertion to SUS_STAT# deassertion
Figure 24,
Figure 25
Table 42. S4 Enter (Shaded)/Exit
Time
Min
Typ
Max
Unit
T1
120
128
140
µs
STPGNT# assertion to SUS_STAT# assertion
Figure 23,
Figure 24,
Figure 25
T11
8
104
1000
µs
LDT_STP# de-assertion to SUS_STAT# deassertion
Figure 24,
Figure 25
5.4.6
Time Description
Figure
Registers for S-State and C-State Timing
The power management registers listed in Table 43 are used for adjusting the Sx and Cx-state
timing. For certain Sx and Cx parameters, the default values in these registers will have to be
changed to meet the timing requirements. The recommended values listed in the most current
revision of the AMD SB800-Series Southbridges Register Programming Requirements should be
used when programming these registers.
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More detailed information on these registers is available in the AMD SB800-Series Southbridges
Register Reference Guide (PID# 45482).
Table 44 lists the current recommended values used to derive timing values listed in Table 36.
Table 43. Registers for Programming Sx and Cx-State Timing
Register Name
PM_IO Reg
Tpreset2
52h
S_LdtStartTime
70h
Tpreset1b
75h
LdtStartTime
88h
AgpStartTime
89h
LdtAgpTimeCntl
8Ah
StutterTime
8Bh
StpClkDlyTime
8Ch
Table 44. Recommend Values for Programming Sx and Cx-State Timing
Register
Recommended value for PM IO
registers
T2
PM IO 0x70[7:0] * 1 µs
PM IO 0x70[7:0] = 00h
0 µs
T4
Fixed at 64 OSC (1 OSC = .0689 µs,
with OSC clock being a 14.31818MHz
input)
-
4 µs
T6
Fixed at 64 OSC+ 40 µS
-
44 µs
T7
6 OSC + PM IO 0x75[5:0] * 8 µs
PM IO 0x75[5:0] =05h
40 µs
T11
PM IO 0x52[5:0] * 8 µs +
PM IO 0x75[5:0] * 8 µs
PM IO 0x52[5:0] = 08h
PM IO 0x75[5:0] = 05h
104 µs
T12
PM IO 0x8C[7:0] * 1 OSC
PM IO 0x8C[7:0] = 00h
0 µs
T14
PM IO 0x89
Programmable 0 to 255 µs
PM IO 0x89 = 0h
0 µs
T15
PM IO 0x8B
Programmable 0 to 255 µs
PM IO 0x8B = 01h
1 µs
Time
Power Sequence and Timing
Timing
Value
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Register
Recommended value for PM IO
registers
T16
PM IO 0x8A[1:0]
Programmable 0/1/32/64 µS
PM IO 0x8A[1:0] = 0h
0 µs
T17
PM IO 0x8A[3:2]
Programmable 0/1/32/64 µS
PM IO 0x8A[3:2] = 0h
0 µs
T18
PM IO 0x88
Programmable 0 to 255 µs
PM IO 0x88 = 00h
0 µs
T19
PM IO 0x8A[6:4]
Programmable1/2/4/8/16/32/64/128µS
PM IO 0x8A[6:4] = 1h
2 µs
Time
Power Sequence and Timing
Timing
Value
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Chapter 6
AMD SB820M Southbridge Databook
Electrical Characteristics
Values quoted in this section are preliminary and require further verification.
6.1
Absolute Ratings
To prevent damage to the ASIC, the voltage applied to each power rail should not exceed 10% of
its nominal voltage, nor should it fall below -0.5V with respect to VSS.
6.2 Functional Operating Range
Use typical values between +/-5% on all input signals.
6.3 DC Characteristics
Table 45. DC Characteristics of the GPIO pins.
Symbol
Parameter
Minimum
Maximum
Unit
Condition
VDDQ
I/O power
3.0
3.46
V
VIL
Input Low Voltage
-
1.5
V
VIH
Input High Voltage
1.5
-
V
VOL
Output Low Voltage
-
0.4
V
IOL = 8.0 mA (Note 1)
VOH
Output High Voltage
2.4
-
V
IOH = 8.0 mA (Note 1)
ILI
Input Leakage Current
-
10
µA
Only applicable when the
integrated resistors are not
enabled.
CIN
Input Capacitance
-
10
pF
Only applicable when the
integrated resistors are not
enabled.
Note 1: For the GEVENT9# and GEVENT10# pads, the IOL and IOH are programmable to values
between 4 and 8 mA.
Table 46. DC Characteristics of the PCI Interface
Symbol
Parameter
Minimum
Maximum
Unit
VDDQ
I/O power
3.0
3.46
V
VIL
Input Low Threshold
-
0.3VDD
V
Electrical Characteristics
Condition
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Symbol
Parameter
VIH
AMD SB820M Southbridge Databook
Minimum
Maximum
Unit
Input High Threshold
0.3VDD
-
V
VOL
Output Low Voltage
-
0.4
V
IOL = 4.0 mA to 12 .0 mA
VOH
Output High Voltage
2.4
-
V
IOH = -4.0 mA to 12 mA
ILI
Input Leakage Current
-
10
µA
Only applicable when the
integrated resistors are not
enabled.
pF
Only applicable when the
integrated resistors are not
enabled.
CIN
Input Capacitance
-
10
Condition
Table 47. DC Characteristics of the CPU Interface
Symbol
Parameter
Minimum
Maximum
Unit
Condition
OD signal
ALLOW_LDTSTP/ PROC_HOT#
VCPU_IO
CPU IO Voltage
-
-
V
VIL
Input Low Voltage
-
1.0
V
VIH
Input High Voltage
1.0
-
V
VOL
Output Low Voltage
-
0.4
V
IOL = 8.0 mA
V
OD signal
0.4
V
IOL = 8.0 mA
Minimum
Maximum
Unit
LDT_PG, LDT_STP#, LDT_RST#
VDDQ
I/O power
VOL
Output Low Voltage
-
Table 48. DC Characteristics of RSMRST#
Symbol
Parameter
S5_3.3V
Core standby power
3.0
3.46
V
VIL
Input Low Voltage
-
1.5
V
VIH
Input High Voltage
1.5
-
V
ILI
Input Leakage Current
-
10
µA
CIN
Input Capacitance
-
10
pf
Condition
Table 49. DC Characteristics of SBPWRGD
Symbol
Parameter
VDDQ
I/O power
VIL
Input Low Voltage
Minimum
Maximum
Unit
Condition
3.0
3.46
V
-
1.5
V
Electrical Characteristics
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Symbol
Parameter
VIH
Input High Voltage
ILI
CIN
AMD SB820M Southbridge Databook
Minimum
Maximum
Unit
Condition
1.5
-
V
Input Leakage Current
-
10
µA
Input Capacitance
-
10
pf
Table 50. DC Characteristics of the LPC Interface
Symbol
Parameter
Minimum
Maximum
Unit
VDDQ
I/O power
3.0
3.46
V
VIL
Input Low Threshold
-
0.3VDD
V
VIH
Input High Threshold
0.3VDD
-
V
VOL
Output Low Voltage
-
0.4
V
IOL = 4.0 mA to 12 .0 mA
VOH
Output High Voltage
2.4
-
V
IOH = -4.0 mA to 12 mA
ILI
Input Leakage Current
-
10
µA
Only applicable when the
integrated resistors are not
enabled.
CIN
Input Capacitance
-
10
pF
Only applicable when the
integrated resistors are not
enabled.
6.4
Condition
RTC Battery Current Consumption
The RTC battery current consumption is estimated as follows:
Table 51. RTC Battery Current Consumption (Preliminary Estimates)
Power State
G3 (Off)
S0-S5
RTC Battery Current
Typical
Maximum
< 0.5 µA
< 0.2 µA
< 4 µA
-
The RTC battery life is calculated using the rated capacity of the battery and the typical current numbers.
The typical batteries used for the RTC are normally rated for 170 mAh, and the worst case current
consumption for the SB820M is 4.0 µA, according to Table 51. Thus, the life of battery can be calculated
as follows:
170,000 µAh / 4 µA = 42,500 h = 4.8 years
Electrical Characteristics
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6.5
AMD SB820M Southbridge Databook
States of Power Rails during ACPI S1 to S5 States
Table 52. States of Power Rails during ACPI S1 to S5 States
Power Rail
CLKGEN and Special Power
VDDXL_33_S
VDDPL_33_SYS
VDDPL_11_SYS_S
VDDAN_11_CLK
USB Pwr
VDDAN_33_USB_S
VDDPL_33_USB_S
VDDCR_11_USB_S
PCI Express® Analog Power
VDDPL_33_PCIE
VDDAN_11_PCIE
S0
S1/S2
S3
S5
Description
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
ON
OFF
ON
OFF
ON
OFF
S5_3.3V (Filtered)
3.3V (Filtered)
S5_1.1V (Filtered)
1.1V (Filtered)
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
USB_3.3V (Filtered)
USB_3.3V (Filtered)
USB_1.1V
ON
ON
ON
ON
OFF
OFF
OFF
OFF
3.3V (Filtered)
1.1V (Filtered)
ON
ON
ON
ON
OFF
OFF
OFF
OFF
1.1V (Filtered)
3.3V (Filtered)
ON
ON
OFF
OFF
1.1V
ON
ON
OFF
OFF
3.3V
ON
ON
OFF
OFF
1.8V
ON
ON
ON
ON
S5_1.5V/S5_3.3V
ON
ON
ON
ON
S5_3.3V
ON
ON
ON
ON
S5_1.1V
Serial ATA Analog Pwr
VDDAN_11_SATA
VDDPL_33_SATA
Core Pwr
VDDCR_11
3.3V I/O Pwr
VDDIO_33_PCIGP
IDE/Flash I/O Pwr
VDDIO_18_FC
HD Audio Pwr
VDDIO_AZ_S
3.3V Standby Pwr
VDDIO_33_S
1.1V Standby Pwr
VDDCR_11_S
Electrical Characteristics
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6.6
System Clock Specifications
6.6.1
System Clock Descriptions
Table 53. System Clock Input Source Descriptions
Internal Clock
Mode Function
External Clock Mode
Function
Master reference
clock
Auxiliary reference
clock
Clock Domain
Frequency
Source
25M_X1,
25M_X2
25 MHz
25-MHz Crystal
PCIE_RCLKP,
PCIE_RCLKN
100 MHz
Main clock generator
(external clock)
SATA_X1,
SATA_X2
25 MHz
25-MHz Crystal
Not used. SATA clock is generated internally
using 25M-X1/25M_X2 reference clock.
32K_X1,
32K_X2
32 KHz
32-KHz Crystal
Reference clock for RTC
USBCLK
48 MHz
48-MHz OSC or
internal USB 48-MHz
PLL
Not Used. USB clock is generated using the
25M-X1/25M_X2 reference clock.
6.6.2
–
For PCIe® differential
input
System Clock Input Frequency Specifications
Table 54. System Clock Input Frequency Specifications
Clock
Frequency
25M_X1, 25M_X2
25.000 MHz ± 50 ppm
USBCLK
See Table 53
SATA_X1, SATA_X2
See Table 53
6.6.3
System Clock Output AC and DC Specifications
NB_LNK_CLKP/N, GPP_CLKP/N, SLT_GFX_CLKP/N, and NB_HT_CLKP/N: These
clocks were designed to be electrically compliant with the PCIe Specification 2.0. Please refer to
the PCI Express® CEM 2.0 Specification for the clocks’ AC and DC specifications.
Electrical Characteristics
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Table 55. NB_DISP_CLKP/N AC Specifications: (Non-Spread Clock)
100 MHz INPUT
Symbol
Parameter
Unit
Min
Max
VIH
Differential Input High
Voltage
+150
-
mV
VIL
Differential Input Low
Voltage
-
-150
mV
VCROSS
Absolute crossing point
voltage
+250
+550
mV
TPERIOD AVG
Average Clock Period
Accuracy
-300
+300
ppm
TCCJITTER
Cycle to Cycle jitter
-
150
ps
Tdc
Reference Duty Cycle
40
60
%
Rising Edge Rate Rising Edge Rate
0.6
4.0
V/ns
Falling Edge Rate Falling Edge Rate
-4.0
-0.6
V/ns
Table 56. CPU_HT_CLKP/N AC Specifications
200/100 MHz Output
Symbol
Parameter
VOH
Unit
Min
Max
Differential Output High Voltage
+150
-
mV
VOL
Differential Output Low Voltage
-
-150
mV
VCROSS
Absolute crossing point voltage
+250
+550
mV
VCROSS DELTA
Variation of VCROSS over all
rising clock edges
-
+140
mV
TPERIOD AVG
Average Clock Period Accuracy
-300
+300
ppm
Rising Edge Rate Rising Edge Rate
0.6
4.0
V/ns
Falling Edge Rate Falling Edge Rate
-4.0
-0.6
V/ns
-
150
ps
40
60
%
TCCJITTER
Cycle to Cycle jitter
Duty Cycle
Duty Cycle
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Table 57. 14-MHz/25-MHz/48-MHz Auxiliary Clock AC Specifications:
Note: In integrated clock mode this pin will output 14.318 MHz clock. The output frequency
varies from cycle to cycle, with an average frequency of 14.318MHz. This clock is available for
customers to use on the system board if it meets the requirements of target device. AMD has not
validated this clock on any specific applications. Since this clock is averaged at 14.318 MHz,
AMD does not recommend this clock to be used for devices that use an Internal PLL. The output
will generate 12 MHz on power up until after SB PWR_GOOD is asserted. After SB
PWR_GOOD assertion, the clock output will be 14MHz. After power up, this pin can be
configured to output 25 MHz or 48 MHz clock.
Value
Symbol
14M
25M
48M
Parameter
14MHz Clock
Frequency
25MHz Clock
Frequency
48 MHz
Clock
Frequency
Output low
voltage
Unit
Note
Min
Typ
Max
14.2146
14.31818
14.8920
MHz
-
24.875
25
25.125
MHz
-
See|
Note
48
See
Note
MHz
Tolerance is
± 100 ppm
VOH
Output high
voltage
2.4
-
-
Rising Slew
Rate
Falling Slew
Rate
Rising Slew
Rate
Falling Slew
Rate
1.0
-
4.0
V/ns
IOL=4.0 mA when
highdrive = 0
IOL = 8.0 mA
when highdrive =
1
IOH=-4.0 mA
when highdrive =
0
IOH = 8.0 mA
when highdrive=1
50pf load
1.0
-
4.0
V/ns
50pf load
Tdc
Duty Cycle
40
-
60
%
VOL
-
-
0.4
V
V
Table 58. PCI Clock AC Specifications
Symbol
Tperiod
Parameter
Clock period
Value
Min
30
Typ
-
Electrical Characteristics
Unit
Max
33.3
Note
MHz
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Symbol
AMD SB820M Southbridge Databook
Parameter
Value
Min
Unit
Note
Typ
-
Max
0.4
V
IOL = 4.0 mA
IOH = -4.0 mA
VOL
Output low voltage
VOH
Output high
voltage
Rising Slew Rate
2.4
-
-
V
1.0
-
4.0
V/ns
50pf load
Falling Slew Rate
1.0
-
4.0
V/ns
50pf load
Rising Slew
Rate
Falling Slew
Rate
Electrical Characteristics
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Chapter 7
7.1
AMD SB820M Southbridge Databook
Package Information
Physical Dimensions
MOD-00115 Doc Rev 02
MOD-00115 REV 02
Figure 30. SB820M 23 mm x 23 mm 0.8 mm Pitch 605-FCBGA Package Outline
Table 59. SB820M 23 mm x 23 mm 0.8 mm Pitch 605-FCBGA Physical Dimensions
Ref.
Min(mm)
Nominal (mm)
Max. (mm)
c
A
A1
A2
0.56
1.77
0.30
0.81
0.40
0.66
1.92
0.40
0.86
0.50
0.76
2.07
0.50
0.91
0.60
22.85
2.00
1.00
22.85
23.00
5.01
23.00
23.15
23.15
φb
D1
D2
D3
D4
E1
Package Information
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7.2
AMD SB820M Southbridge Databook
Ref.
Min(mm)
Nominal (mm)
Max. (mm)
E2
E3
E4
F1
F2
e (min. pitch)
ddd
2.00
1.00
-
6.99
21.60
21.60
0.80
-
0.20
Pressure Specification
To avoid damages to the ASIC (die or solder ball joint cracks) caused by improper mechanical
assembly of the cooling device, follow the recommendations below:
•
It is recommended that the maximum load that is evenly applied across the contact area
between the thermal management device and the die does not exceed 6 lbf. Note that a total
load of 4-6 lbf is adequate to secure the thermal management device and achieve the lowest
thermal contact resistance with a temperature drop across the thermal interface material of no
more than 3°C. Also, the surface flatness of the metal spreader should be 0.001 inch/1 inch.
•
Pre-test the assembly fixture with a strain gauge to make sure that the flexing of the final
assembled board and the pressure applying around the ASIC package will not exceed 600
micron strain under any circumstances.

Ensure that any distortion (bow or twist) of the board after SMT and cooling device assembly
is within industry guidelines (IPC/EIA J-STD-001). For measurement method, refer to the
industry approved technique described in the manual IPC-TM-650, section 2.4.22.
7.3
Thermal Information
This section describes some key thermal parameters of the SB820M. For a detailed discussion on
these parameters and other thermal design descriptions including package level thermal data and
analysis, please consult the Thermal Design and Analysis Guidelines for the SB800-Series
Southbridges, order# 45488.
Table 60. SB820M Thermal Limits
Parameter
Minimum
Nominal
Maximum
Unit
Note
Operating Case
Temperature
0
—
105
°C
1
Absolute Rated Junction
Temperature
—
—
125
°C
2
Storage Temperature
-40
—
60
°C
Ambient Temperature
0
—
45
°C
Package Information
3
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AMD SB820M Southbridge Databook
Parameter
Minimum
Nominal
Maximum
Unit
Note
—
See
Table 61
—
W
4
Thermal Design Power
Notes:
1. The maximum operating case temperature is measured based on the methodology given in the document
Thermal Design and Analysis Guidelines for the SB800-Series Southbridges, order # 45488, Chapter 11.
This is the temperature at which the functionality of the product is qualified.
2. The maximum absolute rated junction temperature is the junction temperature at which the device can
operate without causing damage to the ASIC.
3. The ambient temperature is the temperature of the local intake air to the thermal management device.
The maximum ambient temperature is dependent on the heatsink's local ambient conditions as well as the
chassis' external ambient temperature. Refer to Chapter 5 in the Thermal Design and Analysis Guidelines
for the SB800-Series Southbridges, order # 45488, for heatsink and thermal design guidelines. Refer to
Chapter 6 of the above mentioned document for details of the ambient conditions.
4. Thermal Design Power (TDP) is defined as the highest power dissipated while running currently
available worst case applications at nominal core voltages. The core voltage was raised to 5% above its
nominal value for measuring the ASIC power. Parts specifically screened for higher core power were used
for TDP measurement.
Table 61. SB820M Thermal Design Power for Different Platform Configurations
Performance
Mainstream
Low Power
(Mainstream)
Low Power
(UltraThin)
Enabled
Enabled
Enabled
Enabled
6Gb/s
3Gb/s
3Gb/s
3Gb/s
6
6
4
2
RAID
0,1
0,1
0,1
N/A
FIS-Based
Switching
N/A
N/A
N/A
N/A
PCIe® Gen 1
GPP
2x1
2x1
N/A
N/A
A-Link II
x4
x4
x4
x2
USB Ports
14 + 2
14 + 2
10 + 2
8+2
Enabled
Enabled
N/A
N/A
5.3W
4.9W
4.0W
3.4W
Clock Gen
SATA
SATA Ports
33MHz PCI
TDP
Package Information
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7.4
AMD SB820M Southbridge Databook
Reflow Profile
A reference reflow profile is given below. Please note the following when using RoHS/lead-free
solder (SAC105/305/405 Tin-Silver-Cu):
•
The final reflow temperature profile will depend on the type of solder paste and chemistry of
flux used in the SMT process. Modifications to the reference reflow profile may be required
in order to accommodate the requirements of the other components in the application.
•
An oven with 10 heating zones or above is recommended.
•
To ensure that the reflow profile meets the target specification on both sides of the board, a
different profile and oven recipe for the first and second reflow may be required.
•
Mechanical stiffening can be used to minimize board warpage during reflow.
•
It is suggested to decrease temperature cooling rate to minimize board warpage.
•
This reflow profile applies only to RoHS/lead-free (high temperature) soldering process and
it should not be used for eutectic solder packages. Damage may result if this condition is
violated.
•
Maximum 3 reflows are allowed on the same part.
Table 62. Recommended Board Solder Reflow Profile - RoHS/Lead-Free Solder
Profiling Stage
Temperature
Process Range
Overall Preheat
Room temp to 220°C
2 mins to 4 mins
Soaking Time
130°C to 170°C
Typical 60 – 80 seconds
Liquidus
220°C
Typical 60 – 80 seconds
Ramp Rate
Ramp up and Cooling
<2°C / second
Peak
Max. 245°C
235°C +/-5 °C
Temperature at peak
within 5°C
240°C to 245°C
10 – 30 seconds
Package Information
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Figure 31. RoHS/Lead-Free Solder (SAC305/405 Tin-Silver-Copper) Reflow Profile
Package Information
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Chapter 8
Testability
8.1
XOR Chain Test Mode
8.2
Test Control Signals
Table 63 below shows the signals used for the integrated test controller of the SB820M.
Table 63. Signals for the Test Controller of the SB820M
Signal Name
Description
25M_X1, 25M_X2
25-MHz Reference Clock.
TEST0
Test0 input.
TEST1
Test1 input.
TEST2
Test2 input.
Table 64 shows how Test[2:0] are used to select the normal operation, ASIC debug, or test
mode.
Table 64. Test Mode Signals
TEST2
0
0
0
1
TEST1
0
0
1
X
TEST0
0
1
X
X
Test Mode
Description
None
Reserved
Test Mode
Reserved
Normal operation
Reserved for ASIC debug
EnableTest Mode
Reserved for ASIC debug
When TEST2 is low, a low on TEST1 will reset all test logic and allow TEST0 to choose
between normal operation and the reserved debug mode. A high on TEST1 should be followed
by a bit sequence on TEST0 to define the test mode into which the SB820M will enter. A new
test mode can be entered when a new bit sequence is transmitted. In addition to resetting the test
controller asynchronously with TEST1, a bit sequence can also be used to synchronously change
the test mode. Table 65 shows the legal bit sequences for TEST0. Note: Once the Test mode or
Test mode and sub test mode is entered, Test2 and Test1 should be kept at 0, 1 respectively until
the requirement for the Test Mode is completed.
Testability
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Table 65. TEST0 Bit Sequence
TEST0 bit
sequence
Test Mode
11111
Look for first 0 to define a new test mode
00000
Reserved
00001
Alt Pull High Test
00010
Pull Outputs High
00011
Pull Outputs Low
00100
Pull Outputs to Z
00101
XOR Test Mode
Figure 32 illustrates the data timing for the test signals with respect to the OSC clock. Any
timing reference referred in this section is assumed to be based on OSC clock running at 25
MHz. The OSC clock can be slowed down to 1 MHz as long as the bit stream applied on TEST0
pin is also in sync with this clock. The 25-MHz OSC clock should be disconnected first. For
setting any Test 0 bit sequence, the OSC clock is required only up-to the time the mode set is
completed. After this the clock can be stopped and as long as TEST1 and Test2 pins are set to {1,
0} respectively to maintain the selected mode to be active. Note that once TEST1 is set to one,
TEST0 needs to be asserted to one for at least 8 clocks before transmitting the test mode bit
sequence. The rising of “Internal Test Mode” in the diagram indicates the time when the
SB820M enters into test mode.
Osc
TEST1
TEST0
( TEST0 = 1 ) >
8 Osc clocks
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Internal Test Mode
Figure 32. Test Mode Capturing Sequence Timing
Testability
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8.2.1
AMD SB820M Southbridge Databook
Brief Description of an XOR Chain
A sample of a generic XOR chain is shown in the figure below.
XOR Start Signal
G
F
A
E
D
C
B
Figure 33. A Generic XOR Chain
Pin A is assigned to the output direction, and pins B through F are assigned to the input
direction. It can be seen that after all pins from B to F are assigned to logic 0 or 1, a logic
change in any one of these pins will toggle the output pin A.
The following is the truth table for the XOR Chain shown in Figure 33. The XOR start
signal is assumed to be logic 1.This is an internal signal to the ASIC and is not part of the
XOR tree pins listed in Table 66.
Once the inputs are set to the respective value the output pin will reflect the correct value
within 200 ns. Note: OSC clock is not required to be running after the mode is already set
and the pads are exercised in XOR Tree function.
Table 66. Truth Table for an XOR Chain
Test Vector Input Pin
number
G
Input Pin
F
Input Pin
E
Input Pin
D
Input Pin
C
Input Pin Output Pin
B
A
1
0
0
0
0
0
0
1
2
1
0
0
0
0
0
0
3
1
1
0
0
0
0
1
4
1
1
1
0
0
0
0
5
1
1
1
1
0
0
1
6
1
1
1
1
1
0
0
7
1
1
1
1
1
1
1
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AMD SB820M Southbridge Databook
Description of the SB820M XOR Chain
During XOR Chain Test Mode, most of the chip pads on the SB820M are connected
together using XOR gates as shown in Figure 34. The first input of the chain is connected
to a logic level high (internal connection), and all pads (listed in Table 67) are configured
as inputs except for the last pad in the chain, which is configured as an output.
LDT_STP# is the start of the chain and FC_CE2#/GPIOD150 is the end of the chain.
Table 67 lists all pads that are on the SB820M XOR chain, as well as and their order of
connection. Pads are chained together in the shown order, i.e., pad number 1 is the first
pad on the XOR chain, pad number 2 the second, and so on.
1
( Tie high Internal to Asic)
XOR out
FANOUT0/ GPIO3
pin 1
AD6/ROMA12
pin 2
pin 3
pin N
Frame#
Figure 34. On-chip XOR Chain connectivity
Table 67. List of Pins on the SB820M XOR Chain and the Order of Connection
XOR # Ball No
Pin Name
XOR # Ball No
1
G22
LDT_STP#
2
J24
LDT_RST#
3
J29
LPC_SMI#/GEVENT23#
4
J27
LAD0
5
J25
LDRQ0#
6
G28
LFRAME#
7
H24
LPCCLK0CLK0LPCCLK0
8
H25
LPCCLK1PCCLK1
9
H29
LAD2
10
J26
LAD1
11
G24
KSI_0/GPIO201
12
G25
KSI_1/GPIO202
13
H28
LAD3
Testability
Pin Name
14
G29
FC_RST#/GPO160
15
F25
EC_PWM0/EC_TIMER0/G
PIO197
16
F29
PS2M_DAT/GPIO191
17
F28
PS2KB_CLK/GPIO190
18
F23
SDA2/GPIO194
19
E27
PS2M_CLK/GPIO192
20
E28
KSI_2/GPIO203
21
E29
KSI_3/GPIO204
22
D27
PS2KB_DAT/GPIO189
23
D28
KSI_5/GPIO206
24
D29
KSI_4/GPIO205
25
C28
KSI_7/GPIO208
118
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XOR # Ball No
AMD SB820M Southbridge Databook
Pin Name
XOR # Ball No
Pin Name
26
C29
KSI_6/GPIO207
54
H21
PROCHOT#
27
B28
KSO_0/GPIO209
55
K19
LDT_PG
28
A27
KSO_1/GPIO210
56
G21
29
B27
KSO_2/GPIO211
ALLOW_LDTSTP/DMA_A
CTIVE#
30
A26
KSO_4/GPIO213
57
H9
USB_FSD0P/GPIO185
31
C26
KSO_5/GPIO214
58
J10
USB_FSD1P/GPIO186
32
D26
KSO_3/GPIO212
59
E8
USB_OC3#/AC_PRES/TDO
/GEVENT15#
33
D25
SCL2/GPIO193
34
B25
KSO_7/GPIO216
60
F8
USB_OC0#/TRST#/GEVEN
T12#
35
A24
KSO_6/GPIO215
61
D7
GBE_LED1/GEVENT9#
36
A25
KSO_8/GPIO217
62
E7
37
B24
KSO_10/GPIO219
USB_OC1#/TDI/GEVENT1
3#
38
C24
KSO_11/GPIO220
63
H4
DDR3_RST#/GEVENT7#
39
D24
KSO_9/GPIO218
64
A8
VIN7/GBE_LED3/GPIO182
B7
VIN5/GPIO180
F22
EC_PWM2/EC_TIMER2/G
PIO199
65
40
66
F7
USB_OC2#/TCK/GEVENT
14#
67
B8
VIN6/GBE_STAT3/GPIO18
1
68
D4
USB_OC4#/IR_RX0/GEVE
NT16#
69
A7
VIN4/GPIO179
70
B6
TEMPIN0/GPIO171
71
A6
TEMPIN1/GPIO172
72
E2
SPI_DO/GPIO163
73
D5
GBE_LED0/GPIO183
74
A5
TEMPIN2/GPIO173
75
B5
TEMPIN3/TALERT#/GPIO
174
76
A4
VIN2/GPIO177
41
E26
SDA3_LV/GPIO196
42
A23
KSO_13/GPIO222
43
B23
KSO_12/GPIO221
44
B26
SCL3_LV/GPIO195
45
F21
SPI_CS2#/GBE_STAT2/GP
IO166
46
A22
KSO_16/GPIO225
47
B22
KSO_17/GPIO226
48
C22
KSO_15/GPIO224
49
D22
KSO_14/GPIO223
50
E22
EC_PWM1/EC_TIMER1/G
PIO198
51
E24
PS2_CLK/SCL4/GPIO188
52
E21
EC_PWM3/EC_TIMER3/G
PIO200
77
A3
VIN0/GPIO175
53
E23
PS2_DAT/SDA4/GPIO187
78
D1
USB_OC6#/IR_TX1/GEVE
NT6#
Testability
119
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XOR # Ball No
AMD SB820M Southbridge Databook
Pin Name
XOR # Ball No
79
D3
SPI_CS3#/GBE_STAT1/GE
VENT21#
80
B4
VIN1/GPIO176
81
E1
IR_LED#/LLB#/GPIO184
82
C5
VIN3/GPIO178
83
E4
USB_OC5#/IR_TX0/GEVE
NT17#
84
H2
GEVENT5#
85
F2
PWR_BTN#
86
F3
IR_RX1/GEVENT20#
87
G5
GBE_LED2/GEVENT10#
88
J1
SYS_RESET#/GEVENT19#
89
K2
LPC_PME#/GEVENT3#
90
J5
SPI_DI/GPIO164
91
F4
SDA1/GPIO228
92
G6
SUS_STAT#
93
G2
ROM_RST#/GPIO161
94
H6
WAKE#/GEVENT8#
95
J2
PCI_PME#/GEVENT4#
96
H3
BLINK/USB_OC7#/GEVE
NT18#
97
F5
98
Pin Name
107
T1
GBE_COL
108
T4
GBE_CRS
109
V7
GBE_PHY_INTR
110
P4
GBE_PHY_PD
111
P1
PCIE_RST#
112
L1
A_RST#
113
V2
PCIRST#
114
L2
AZ_SDIN0/GPIO167
115
M1
AZ_SDIN2/GPIO169
116
M2
AZ_SDIN1/GPIO168
117
P2
AZ_RST#
118
M4
AZ_SDIN3/GPIO170
119
N2
AZ_SYNC
120
N1
AZ_SDOUT
121
M3
AZ_BITCLK
122
U2
GBE_RXD0
123
U1
GBE_RXD3
124
T5
GBE_RXCTL/RXDV
125
T9
GBE_RXCLK
126
U3
GBE_RXD2
SCL1/GPIO227
127
T2
GBE_RXD1
J6
THRMTRIP#/SMBALERT#
/GEVENT2#
128
M7
GBE_TXCTL/TXEN
129
P9
GBE_TXD2
99
K4
SPI_CLK/GPIO162
130
M5
GBE_TXD3
100
K1
RI#/GEVENT22#
131
P5
GBE_TXCLK
101
K9
SPI_CS1#/GPIO165
132
P7
GBE_TXD0
102
K3
GBE_STAT0/GEVENT11#
133
T7
GBE_TXD1
103
V5
GBE_RXERR
134
Y9
FANOUT2/GPIO54
104
L6
GBE_MDCK
135
W5
FANOUT0/GPIO52
105
L5
GBE_MDIO
136
W7
FANIN0/GPIO56
106
M9
GBE_PHY_RST#
137
W6
FANOUT1/GPIO53
Testability
120
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XOR # Ball No
AMD SB820M Southbridge Databook
Pin Name
XOR # Ball No
Pin Name
138
W8
FANIN2/GPIO58
166
AG1
AD21/GPIO21
139
V9
FANIN1/GPIO57
167
AE7
TRDY#
140
Y1
PCICLK4/14M_OSC/GPO3
9O39
168
AF4
AD27/GPIO27
141
W2
PCICLK0PPCICLK0
W1
PCICLK1/GPO36CLK1/GP
O36
143
W3
PCICLK2/GPO37CLK1CIC
LK2/G37
144
W4
PCICLK3/GPO38CCICLK3
/GPO38
145
AB1
AD3/GPIO3
146
AA6
AD8/GPIO8
147
AD1
AD13/GPIO13
148
AC4
AD11/GPIO11
149
AC1
150
142
169
AC11 AD25/GPIO25
170
AH2
AD29/GPIO29
171
AG2
AD30/GPIO30
172
AH3
AD31/GPIO31
173
AG4
INTG#/GPIO34
174
AD12 GNT0#
175
AJ4
INTH#/GPIO35
176
AJ6
INTE#/GPIO32
177
AE11 REQ0#
178
AH4
REQ2#/CLK_REQ8#/GPIO
41
AD12/GPIO12
179
AJ5
GNT1#/GPO44
AA4
AD1/GPIO1
180
AH5
REQ1#/GPIO40
151
AB2
AD5/GPIO5
181
AF6
AD26/GPIO26
152
AA1
AD0/GPIO0
182
AH6
GNT2#/GPO45
153
AC6
AD15/GPIO15
183
AG6
INTF#/GPIO33
154
AC5
PAR
184
AD9
AD24/GPIO24
155
AB6
AD6/GPIO6
185
AE2
AD16/GPIO16
156
AB5
AD7/GPIO7
186
AB11 CLKRUN#
157
AA5
AD4/GPIO4
187
AE3
AD19/GPIO19
158
AA3
AD2/GPIO2
188
AE6
PERR#
159
AD7
LOCK#
189
AD8
CBE2#
160
AE4
SERR#
190
AB9
DEVSEL#
161
AA10 CBE3#
191
AD5
CBE1#
162
AC2
AD9/GPIO9
192
AF3
AD28/GPIO28
163
AA8
CBE0#
193
AJ3
IRDY#
164
AE9
AD23/GPIO23
194
AF1
AD20/GPIO20
165
AF2
AD22/GPIO22
195
AF5
STOP#
Testability
121
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XOR # Ball No
AMD SB820M Southbridge Databook
Pin Name
196
AC3
AD10/GPIO10
197
AE8
FRAME#
198
AD2
AD14/GPIO14
199
AF8
AD18/GPIO18
200
AE1
AD17/GPIO17
XOR # Ball No
Pin Name
219
AC19 NB_PWRGD
220
AB21
221
AD21 GA20IN/GEVENT0#
222
AJ26
FC_ADQ1/GPIOD129
223
AJ27
FC_ADQ0/GPIOD128
224
AH24 FC_ADQ3/GPIOD131
225
AH25 FC_ADQ2/GPIOD130
226
AH23 FC_ADQ5/GPIOD133
227
AG23 FC_ADQ4/GPIOD132
228
AG21 FC_ADQ7/GPIOD135
229
AJ22
230
AF26 FC_FBCLKIN
231
AH22 FC_ADQ9/GPIOD137
232
AF21 FC_ADQ8/GPIOD136
233
AJ25
FC_ADQ13/GPIOD141
234
AJ24
FC_ADQ12/GPIOD140
235
AF23 FC_ADQ11/GPIOD139
236
AJ23
237
AH26 FC_ADQ15/GPIOD143
238
AG25 FC_ADQ14/GPIOD142
SMARTVOLT1/SATA_IS2
#/GPIO50
201
AD11 SATA_ACT#/GPIO67
202
AC12
REQ3#/CLK_REQ5#/GPIO
42
203
AB12
GNT3#/CLK_REQ7#/GPIO
46
204
CLK_REQG#/GPIO65/OSC
AA20
IN
205
AA18
LDRQ1#/CLK_REQ6#/GPI
O49
206
AB18
CLK_REQ1#/FANOUT4/G
PIO61
207
CLK_REQ0#/SATA_IS3#/
AC18
GPIO60
208
AE22 SDA0/GPIO47
209
SATA_IS5#/FANIN3/GPIO
AE19
59
210
AD19
211
AD22 SCL0/GPIO43
239
AH28 FC_CLK
212
SATA_IS4#/FANOUT3/GPI
AF20
O55
240
AG28 FC_FBCLKOUT
213
AF19 SPKR/GPIO66
241
AF28 FC_OE#/GPIOD145
AF29 FC_INT1/GPIOD144
AA16
CLK_REQ3#/SATA_IS1#/
GPIO63
242
214
243
AG26 FC_WE#/GPIOD148
215
AH21
CLK_REQ2#/FANIN4/GPI
O62
244
AG29 FC_AVD#/GPIOD146
245
AH27 FC_INT2/GPIOD147
216
AJ21
SMARTVOLT2/SHUTDO
WN#/GPIO51
246
AF27 FC_CE1#/GPIOD149
217
AB19 SERIRQ/GPIO48
247
AE29 FC_CE2#/GPIOD150
218
AE21 KBRST#/GEVENT1#
CLK_REQ4#/SATA_IS0#/
GPIO64
Testability
FC_ADQ6/GPIOD134
FC_ADQ10/GPIOD138
122
47283 2.10 Dec 2010
8.2.2.1
AMD SB820M Southbridge Databook
Unused Pins
The pins that are part of the XOR chain (see Table 67) but are not used for testing must be
pulled-up or down before the XOR chain is activated. No pins in the XOR chain should be left
floating. All digital or analog pins not included in Table 67 are not part of the XOR chain and
can be left floating during an XOR test. That includes the output of the XOR chain,
FANOUT0/GPIO3, and other pads shown in Table 68 below.
Table 68. Signals that are not part of the XOR chain
Ball
No
Pin Name
Description
L25
W5
AE29
H5
G1
D2
14M_25M_48M_OSCC
FANOUT0/GPIO52
FC_CE2#/GPIOD150
PWR_GOOD
RSMRST#
RTCCLK
F1
SLP_S3#
H1
SLP_S5#
B3
C4
F6
A10
TEST0
TEST1/TMS
TEST2
USBCLK/14M_25M_48M_OSC
No test support
XOR chang output pin
Used for capturing straps
Used for capturing straps
No test support
In S5 power well. No test
support.
In S5 power well. No test
support.
Test controller data input
Test controller mode
Test controller data input
No test support
Testability
123
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AMD SB820M Southbridge Databook
Appendix A
Pin Listing
Table 69. Pin Listing by Interface
System Pin Name
Ball
No.
CPU Interface
System Pin Name
Ball
No.
System Pin Name
Ball
No.
A_TX1N
AC29
NC4
W23
A_TX2P
AB29
NC3
V24
A_TX2N
AB28
NC5
W24
A_TX3P
AB26
NC6
W25
ALLOW_LDTSTP/
DMA_ACTIVE#
G21
LDT_PG
K19
LDT_STP#
G22
A_TX3N
AB27
PCI 33 Interface
LDT_RST#
J24
A_RX0P
AE24
PCICLK0
W2
PROCHOT#
H21
A_RX0N
AE23
PCICLK1/GPO36
W1
A_RX1P
AD25
PCICLK2/GPO37
W3
A_RX1N
AD24
PCICLK3/GPO38
W4
A_RX2P
AC24
Y1
A_RX2N
AC25
PCICLK4/14M_OSC/
GPO39
A_RX3P
AB25
A_RST#
L1
A_RX3N
AB24
PCIE_RST#
P1
PCIE_CALRP
AD29
PCIRST#
V2
PCIE_CALRN
AD28
INTE#/GPIO32
AJ6
GPP_TX0P
AA28
INTF#/GPIO33
AG6
GPP_TX0N
AA29
INTG#/GPIO34
AG4
AA18
GPP_TX1P
Y29
INTH#/GPIO35
AJ4
GPP_TX1N
Y28
AD0/GPIO0
AA1
J29
NC9
Y26
AD1/GPIO1
AA4
NC10
Y27
AD2/GPIO2
AA3
NC7
W28
AD3/GPIO3
AB1
NC8
W29
AD4/GPIO4
AA5
GPP_RX0P
AA22
AD5/GPIO5
AB2
GPP_RX0N
Y21
AD6/GPIO6
AB6
GPP_RX1P
AA25
AD7/GPIO7
AB5
GPP_RX1N
AA24
AD8/GPIO8
AA6
AD9/GPIO9
AC2
LPC Interface
LPCCLK0
H24
LPCCLK1
H25
LAD0
J27
LAD1
J26
LAD2
H29
LAD3
H28
LFRAME#
G28
LDRQ0#
J25
LDRQ1#/CLK_REQ6#/
GPIO49
LPC_SMI#/GEVENT23#
SERIRQ/GPIO48
AB19
®
PCI Express Interface
PCIE_RCLKP/
NB_LNK_CLKP
M23
PCIE_RCLKN/
NB_LNK_CLKN
P23
A_TX0P
AD26
A_TX0N
AD27
A_TX1P
AC28
Pin Listing
124
47283 2.10 Dec 2010
AMD SB820M Southbridge Databook
System Pin Name
Ball
No.
System Pin Name
Ball
No.
System Pin Name
Ball
No.
AD10/GPIO10
AC3
STOP#
AF5
USB_HSD8P
D13
AD11/GPIO11
AC4
PERR#
AE6
USB_HSD8N
C13
AD12/GPIO12
AC1
SERR#
AE4
USB_HSD7P
G12
AD13/GPIO13
AD1
LOCK#
AD7
USB_HSD7N
G14
AD14/GPIO14
AD2
REQ0#
AE11
USB_HSD6P
G16
AD15/GPIO15
AC6
REQ1#/GPIO40
AH5
USB_HSD6N
G18
AD16/GPIO16
AE2
AH4
USB_HSD5P
D16
AD17/GPIO17
AE1
REQ2#/CLK_REQ8#/
GPIO41
USB_HSD5N
C16
REQ3#/CLK_REQ5#/
GPIO42
AC12
USB_HSD4P
B14
AD12
USB_HSD4N
A14
GNT0#
AD18/GPIO18
AF8
AD19/GPIO19
AE3
AD20/GPIO20
AF1
AD21/GPIO21
AG1
AD22/GPIO22
AF2
AD23/GPIO23
AE9
USB_HSD3P
E18
GNT1#/GPO44
AJ5
USB_HSD3N
E16
GNT2#/GPO45
AH6
USB_HSD2P
J16
USB_HSD2N
J18
AB12
USB_HSD1P
B17
AB11
USB_HSD1N
A17
AD24/GPIO24
AD9
GNT3#/CLK_REQ7#/
GPIO46
AD25/GPIO25
AC11
CLKRUN#
AD26/GPIO26
AF6
USB Interface
USB_HSD0P
A16
AD27/GPIO27
AF4
USB_FSD1P/GPIO186
J10
USB_HSD0N
B16
AD28/GPIO28
AF3
USB_FSD1N
H11
A10
AD29/GPIO29
AH2
USB_FSD0P/GPIO185
H9
USBCLK/
14M_25M_48M_OSC
AD30/GPIO30
AG2
USB_FSD0N
J8
USB_RCOMP
G19
AD31/GPIO31
AH3
USB_HSD13P
B12
Flash Memory
CBE0#
AA8
USB_HSD13N
A12
CBE1#
AD5
USB_HSD12P
F11
FC_RST#/GPO160
CBE2#
AD8
USB_HSD12N
E11
FC_CLK
AH28
CBE3#
AA10
USB_HSD11P
E14
FC_FBCLKOUT
AG28
FRAME#
AE8
USB_HSD11N
E12
FC_FBCLKIN
AF26
DEVSEL#
AB9
USB_HSD10P
J12
FC_ADQ0/GPIOD128
AJ27
IRDY#
AJ3
USB_HSD10N
J14
FC_ADQ1/GPIOD129
AJ26
TRDY#
AE7
USB_HSD9P
A13
FC_ADQ2/GPIOD130
AH25
PAR
AC5
USB_HSD9N
B13
FC_ADQ3/GPIOD131
AH24
Pin Listing
Note: Flash controller function is not
supported by the SB820M
G29
125
47283 2.10 Dec 2010
System Pin Name
AMD SB820M Southbridge Databook
Ball
No.
System Pin Name
Ball
No.
System Pin Name
Ball
No.
FC_ADQ4/GPIOD132
AG23
SATA_RX2P
AH12
AZ_SYNC
N2
FC_ADQ5/GPIOD133
AH23
SATA_TX3P
AH14
AZ_RST#
P2
FC_ADQ6/GPIOD134
AJ22
SATA_TX3N
AJ14
AZ_SDIN0/GPIO167
L2
FC_ADQ7/GPIOD135
AG21
SATA_RX3N
AG14
AZ_SDIN1/GPIO168
M2
FC_ADQ8/GPIOD136
AF21
SATA_RX3P
AF14
FC_ADQ9/GPIOD137
AH22
SATA_TX4P
AG17
AZ_SDIN2/GPIO169
M1
FC_ADQ10/GPIOD138
AJ23
SATA_TX4N
AF17
AZ_SDIN3/GPIO170
M4
FC_ADQ11/GPIOD139
AF23
SATA_RX4N
AJ17
FC_ADQ12/GPIOD140
AJ24
SATA_RX4P
AH17
FC_ADQ13/GPIOD141
AJ25
SATA_TX5P
AJ18
FC_ADQ14/GPIOD142
AG25
SATA_TX5N
AH18
FC_ADQ15/GPIOD143
AH26
SATA_RX5N
AH19
FC_INT1/GPIOD144
AF29
SATA_RX5P
AJ19
FC_OE#/GPIOD145
AF28
SATA_CALRP
AB14
FC_AVD#/GPIOD146
AG29
SATA_CALRN
AA14
FC_INT2/GPIOD147
AH27
SATA_X1
AD16
FC_WE#/GPIOD148
AG26
SATA_X2
AC16
FC_CE1#/GPIOD149
AF27
SATA_ACT#/GPIO67
FC_CE2#/GPIOD150
AE29
Serial ATA
SATA_TX0P
AH9
SATA_TX0N
AJ9
SATA_RX0N
AJ8
SATA_RX0P
AH8
SATA_TX1P
AH10
SATA_TX1N
AJ10
SATA_RX1N
AG10
SATA_RX1P
AF10
SATA_TX2P
AG12
SATA_TX2N
AF12
SATA_RX2N
AJ12
Real Time Clock
32K_X1
C1
32K_X2
C2
VDDBT_RTC_G
B1
RTCCLK
D2
INTRUDER_ALERT#
B2
Clock Generator
25M_X1
L26
25M_X2
L27
AD11
USBCLK/
14M_25M_48M_OSC
A10
CLK_REQ4#/
SATA_IS0#/GPIO64
AD19
14M_25M_48M_OSC
L25
CLK_REQ3#/
SATA_IS1#/GPIO63
AA16
PCICLK4/14M_OSC/
GPO39
Y1
SMARTVOLT1/
SATA_IS2#/GPIO50
AB21
PCIE_RCLKP/
NB_LNK_CLKP
M23
CLK_REQ0#/
SATA_IS3#/GPIO60
AC18
PCIE_RCLKN/
NB_LNK_CLKN
P23
SATA_IS4#/FANOUT3/
GPIO55
AF20
NB_DISP_CLKP
U29
NB_DISP_CLKN
U28
SATA_IS5#/FANIN3/
GPIO59
AE19
NB_HT_CLKP
T26
NB_HT_CLKN
T27
CPU_HT_CLKP
V21
CPU_HT_CLKN
T21
HD Audio Interface
AZ_BITCLK
M3
AZ_SDOUT
N1
Pin Listing
126
47283 2.10 Dec 2010
AMD SB820M Southbridge Databook
System Pin Name
Ball
No.
System Pin Name
SLT_GFX_CLKP
V23
GPIO49
SLT_GFX_CLKN
T23
GNT3#/CLK_REQ7#/
GPIO46
GPP_CLK0P
L29
GPP_CLK0N
L28
GPP_CLK1P
N29
GPP_CLK1N
N28
GPP_CLK2P
M29
GPP_CLK2N
M28
GPP_CLK3P
T25
GPP_CLK3N
V25
REQ2#/CLK_REQ8#/G
PIO41
CLK_REQG#/GPIO65/
OSCIN/IDLEEXIT#
Ball
No.
Ball
No.
System Pin Name
VIN4/GPIO179
A7
AB12
VIN5/GPIO180
B7
B8
AH4
VIN6/GBE_STAT3/
GPIO181
A8
AA20
VIN7/GBE_LED3/
GPIO182
VDDAN_33_HWM_S
D6
VSSAN_HWM
D8
Hardware Monitor
Note: Hardware monitor functionality is not
supported by the SB820M
FANOUT0/GPIO52
W5
FANOUT1/GPIO53
W6
FANOUT2/GPIO54
Y9
SPI ROM Interface
SPI_CLK/GPIO162
K4
SPI_DO/GPIO163
E2
SPI_DI/GPIO164
J5
SPI_CS1#/GPIO165
K9
SPI_CS2#/GBE_STAT2/
GPIO166
F21
SPI_CS3#/GBE_STAT1/
GEVENT21#
D3
GPP_CLK4P
L24
GPP_CLK4N
L23
GPP_CLK5P
P25
GPP_CLK5N
M25
CLK_REQ1#/FANOUT4/
AB18
GPIO61
GPP_CLK6P
P29
FANIN0/GPIO56
W7
GPP_CLK6N
P28
FANIN1/GPIO57
V9
GPP_CLK7P
N26
FANIN2/GPIO58
W8
SLP_S3#
F1
GPP_CLK7N
N27
SLP_S5#
H1
T29
SATA_IS5#/FANIN3/
GPIO59
AE19
GPP_CLK8P
F2
T28
CLK_REQ2#/FANIN4/
GPIO62
PWR_BTN#
GPP_CLK8N
AH21
PWR_GOOD
H5
NB_PWRGD
AC19
SUS_STAT#
G6
CLK_REQ0#/
SATA_IS3#/GPIO60
AC18
CLK_REQ3#/SATA_IS1
#/GPIO63
AF20
NB / Power Management
TEMP_COMM
C7
TEMPIN0/GPIO171
B6
TEMPIN1/GPIO172
A6
RSMRST#
G1
AH21
TEMPIN2/GPIO173
A5
J1
AA16
TEMPIN3/TALERT#/
GPIO174
SYS_RESET#/
GEVENT19#
B5
VIN0/GPIO175
A3
VIN1/GPIO176
B4
VIN2/GPIO177
A4
VIN3/GPIO178
C5
CLK_REQ1#/FANOUT4/
AB18
GPIO61
CLK_REQ2#/FANIN4/
GPIO62
SATA_IS4#/FANOUT3/
GPIO55
CLK_REQ4#/SATA_IS0
#/GPIO64
AD19
REQ3#/CLK_REQ5#/G
PIO42
AC12
LDRQ1#/CLK_REQ6#/
AA18
Pin Listing
Keyboard and PS/2 Controller
Note: KB and PS/2 controller function is not
supported by the SB820M
PS2_DAT/SDA4/
GPIO187
E23
PS2_CLK/SCL4/
GPIO188
E24
127
47283 2.10 Dec 2010
AMD SB820M Southbridge Databook
System Pin Name
Ball
No.
System Pin Name
Ball
No.
PS2KB_DAT/GPIO189
D27
KSO_13/GPIO222
A23
PS2KB_CLK/GPIO190
F28
KSO_14/GPIO223
D22
PS2M_DAT/GPIO191
F29
KSO_15/GPIO224
C22
PS2M_CLK/GPIO192
E27
KSO_16/GPIO225
A22
KSO_17/GPIO226
B22
EC_PWM0/EC_TIMER0
/GPIO197
F25
EC_PWM1/EC_TIMER1
/GPIO198
E22
GbE RGMII/MII & PHY
EC_PWM2/EC_TIMER2
/GPIO199
F22
EC_PWM3/EC_TIMER3
/GPIO200
E21
KSI_0/GPIO201
G24
KSI_1/GPIO202
G25
KSI_2/GPIO203
E28
KSI_3/GPIO204
E29
KSI_4/GPIO205
D29
KSI_5/GPIO206
D28
KSI_6/GPIO207
C29
KSI_7/GPIO208
C28
KSO_0/GPIO209
B28
KSO_1/GPIO210
A27
KSO_2/GPIO211
B27
KSO_3/GPIO212
D26
KSO_4/GPIO213
A26
KSO_5/GPIO214
C26
KSO_6/GPIO215
A24
KSO_8/GPIO217
A25
KSO_9/GPIO218
D24
KSO_10/GPIO219
B24
KSO_11/GPIO220
C24
KSO_12/GPIO221
B23
Note: GbE controller function is not
supported by the SB820M
System Pin Name
Ball
No.
VIN7/GBE_LED3/
GPIO182
A8
GBE_STAT0/
GEVENT11#
K3
SPI_CS3#/GBE_STAT1/
GEVENT21#
D3
SPI_CS2#/GBE_STAT2/
GPIO166
F21
B8
GBE_COL
T1
VIN6/GBE_STAT3/
GPIO181
GBE_CRS
T4
General Events
GBE_MDCK
L6
GA20IN/GEVENT0#
AD21
GBE_MDIO
L5
KBRST#/GEVENT1#
AE21
GBE_RXCLK
T9
J6
GBE_RXD3
U1
THRMTRIP#/SMBALER
T#/GEVENT2#
GBE_RXD2
U3
LPC_PME#/GEVENT3#
K2
GBE_RXD1
T2
PCI_PME#/GEVENT4#
J2
GBE_RXD0
U2
GEVENT5#
H2
GBE_RXCTL/RXDV
T5
USB_OC6#/IR_TX1/
GEVENT6#
D1
GBE_RXERR
V5
H4
GBE_TXCLK
P5
DDR3_RST#/
GEVENT7#
GBE_TXD3
M5
WAKE#/GEVENT8#
H6
GBE_TXD2
P9
GBE_LED1/GEVENT9#
D7
GBE_TXD1
T7
GBE_LED2/
GEVENT10#
G5
GBE_TXD0
P7
GBE_TXCTL/TXEN
M7
GBE_STAT0/
GEVENT11#
K3
GBE_PHY_PD
P4
F8
GBE_PHY_RST#
M9
USB_OC0#/TRST#/
GEVENT12#
GBE_PHY_INTR
V7
USB_OC1#/TDI/
GEVENT13#
E7
GBE_LED0/GPIO183
D5
GBE_LED1/GEVENT9#
D7
USB_OC2#/TCK/
GEVENT14#
F7
GBE_LED2/GEVENT10
#
G5
USB_OC3#/AC_PRES/
TDO/GEVENT15#
E8
Pin Listing
128
47283 2.10 Dec 2010
AMD SB820M Southbridge Databook
System Pin Name
Ball
No.
USB_OC4#/IR_RX0/
GEVENT16#
D4
USB_OC5#/IR_TX0/
GEVENT17#
E4
BLINK/USB_OC7#/
GEVENT18#
H3
SYS_RESET#/
GEVENT19#
J1
IR_RX1/GEVENT20#
F3
System Pin Name
Ball
No.
System Pin Name
Ball
No.
AD6/GPIO6
AB6
PCICLK2/GPO37
W3
AD7/GPIO7
AB5
PCICLK3/GPO38
W4
AD8/GPIO8
AA6
Y1
AD9/GPIO9
AC2
PCICLK4/14M_OSC/
GPO39
AD10/GPIO10
AC3
AD11/GPIO11
AC4
AD12/GPIO12
AC1
AD13/GPIO13
REQ1#/GPIO40
AH5
REQ2#/CLK_REQ8#/
GPIO41
AH4
AD1
REQ3#/CLK_REQ5#/
GPIO42
AC12
SPI_CS3#/GBE_STAT1/
GEVENT21#
D3
AD14/GPIO14
AD2
SCL0/GPIO43
AD22
RI#/GEVENT22#
K1
AD15/GPIO15
AC6
GNT1#/GPO44
AJ5
LPC_SMI#/GEVENT23#
J29
AD16/GPIO16
AE2
GNT2#/GPO45
AH6
AD17/GPIO17
AE1
GNT3#/CLK_REQ7#/GP
AB12
IO46
SM Bus
SCL0/GPIO43
AD22
AD18/GPIO18
AF8
SDA0/GPIO47
AE22
AD19/GPIO19
AE3
SCL1/GPIO227
F5
AD20/GPIO20
AF1
SDA1/GPIO228
F4
AD21/GPIO21
AG1
SCL2/GPIO193
D25
AD22/GPIO22
AF2
SDA2/GPIO194
F23
AD23/GPIO23
AE9
SCL3_LV/GPIO195
B26
AD24/GPIO24
SDA3_LV/GPIO196
E26
PS2_DAT/SDA4/
GPIO187
E23
PS2_CLK/SCL4/
GPIO188
E24
SDA0/GPIO47
AE22
SERIRQ/GPIO48
AB19
LDRQ1#/CLK_REQ6#/
GPIO49
AA18
SMARTVOLT1/
SATA_IS2#/GPIO50
AB21
AD9
SMARTVOLT2/
SHUTDOWN#/GPIO51
AJ21
AD25/GPIO25
AC11
FANOUT0/GPIO52
W5
AD26/GPIO26
AF6
FANOUT1/GPIO53
W6
AD27/GPIO27
AF4
FANOUT2/GPIO54
Y9
AD28/GPIO28
AF3
S0-Domain General Purpose
I/O
AD29/GPIO29
AH2
SATA_IS4#/FANOUT3/
GPIO55
AD30/GPIO30
AG2
FANIN0/GPIO56
W7
AD0/GPIO0
AA1
AD31/GPIO31
AH3
FANIN1/GPIO57
V9
AD1/GPIO1
AA4
INTE#/GPIO32
AJ6
FANIN2/GPIO58
W8
AD2/GPIO2
AA3
INTF#/GPIO33
AG6
AE19
AD3/GPIO3
AB1
SATA_IS5#/FANIN3/
GPIO59
INTG#/GPIO34
AG4
AD4/GPIO4
AA5
INTH#/GPIO35
AJ4
CLK_REQ0#/
SATA_IS3#/GPIO60
AC18
AD5/GPIO5
AB2
PCICLK1/GPO36
W1
CLK_REQ1#/FANOUT4/ AB18
Pin Listing
AF20
129
47283 2.10 Dec 2010
System Pin Name
AMD SB820M Southbridge Databook
Ball
No.
GPIO61
CLK_REQ2#/FANIN4/
GPIO62
AH21
System Pin Name
Ball
No.
System Pin Name
Ball
No.
VIN3/GPIO178
C5
KSI_2/GPIO203
E28
VIN4/GPIO179
A7
KSI_3/GPIO204
E29
VIN5/GPIO180
B7
KSI_4/GPIO205
D29
VIN6/GBE_STAT3/
GPIO181
B8
KSI_5/GPIO206
D28
KSI_6/GPIO207
C29
VIN7/GBE_LED3/
GPIO182
A8
KSI_7/GPIO208
C28
KSO_0/GPIO209
B28
KSO_1/GPIO210
A27
KSO_2/GPIO211
B27
CLK_REQ3#/
SATA_IS1#/GPIO63
AA16
CLK_REQ4#/
SATA_IS0#/GPIO64
AD19
CLK_REQG#/
GPIO65/OSCIN/
IDLEEXT#
AA20
GBE_LED0/GPIO183
D5
SPKR/GPIO66
AF19
IR_LED#/LLB#/
GPIO184
E1
SATA_ACT#/GPIO67
AD11
USB_FSD0P/GPIO185
H9
KSO_3/GPIO212
D26
USB_FSD1P/GPIO186
J10
KSO_4/GPIO213
A26
PS2_DAT/SDA4/
GPIO187
E23
KSO_5/GPIO214
C26
KSO_6/GPIO215
A24
S5-Domain General Purpose
I/O
FC_RST#/GPO160
G29
ROM_RST#/GPIO161
G2
SPI_CLK/GPIO162
K4
SPI_DO/GPIO163
E2
SPI_DI/GPIO164
J5
SPI_CS1#/GPIO165
K9
PS2_CLK/SCL4/
GPIO188
E24
KSO_7/GPIO216
B25
PS2KB_DAT/GPIO189
D27
KSO_8/GPIO217
A25
PS2KB_CLK/GPIO190
F28
KSO_9/GPIO218
D24
PS2M_DAT/GPIO191
F29
KSO_10/GPIO219
B24
PS2M_CLK/GPIO192
E27
KSO_11/GPIO220
C24
F21
SCL2/GPIO193
D25
KSO_12/GPIO221
B23
AZ_SDIN0/GPIO167
L2
SDA2/GPIO194
F23
KSO_13/GPIO222
A23
AZ_SDIN1/GPIO168
M2
SCL3_LV/GPIO195
B26
KSO_14/GPIO223
D22
AZ_SDIN2/GPIO169
M1
SDA3_LV/GPIO196
E26
KSO_15/GPIO224
C22
AZ_SDIN3/GPIO170
M4
EC_PWM0/EC_TIMER0
/GPIO197
F25
KSO_16/GPIO225
A22
TEMPIN0/GPIO171
B6
KSO_17/GPIO226
B22
EC_PWM1/EC_TIMER1
/GPIO198
E22
EC_PWM2/EC_TIMER2
/GPIO199
F22
EC_PWM3/EC_TIMER3
/GPIO200
E21
KSI_0/GPIO201
G24
KSI_1/GPIO202
G25
SPI_CS2#/GBE_STAT2/
GPIO166
TEMPIN1/GPIO172
A6
TEMPIN2/GPIO173
A5
TEMPIN3/TALERT#/
GPIO174
B5
VIN0/GPIO175
A3
VIN1/GPIO176
B4
VIN2/GPIO177
A4
Pin Listing
SCL1/GPIO227
F5
SDA1/GPIO228
F4
General Purpose I/OD
FC_ADQ0/GPIOD128
AJ27
FC_ADQ1/GPIOD129
AJ26
FC_ADQ2/GPIOD130
AH25
FC_ADQ3/GPIOD131
AH24
130
47283 2.10 Dec 2010
System Pin Name
AMD SB820M Southbridge Databook
Ball
No.
FC_ADQ4/GPIOD132
AG23
FC_ADQ5/GPIOD133
AH23
System Pin Name
Ball
No.
USB_OC2#/TCK/
GEVENT14#
F7
System Pin Name
Ball
No.
VDDPL_33_USB_S
F19
VDDCR_11_USB_S_1
A11
FC_ADQ6/GPIOD134
AJ22
USB_OC3#/AC_PRES/
TDO/GEVENT15#
E8
VDDCR_11_USB_S_2
B11
FC_ADQ7/GPIOD135
AG21
CLKGEN and Special Power
VDDAN_11_USB_S_1
C11
FC_ADQ8/GPIOD136
AF21
VDDXL_33_S
L20
VDDAN_11_USB_S_2
D11
FC_ADQ9/GPIOD137
AH22
VSSXL
M19
USB Analog GND
FC_ADQ10/GPIOD138
AJ23
VDDPL_33_SYS
M21
VSSIO_USB_1
A9
FC_ADQ11/GPIOD139
AF23
VDDPL_11_SYS_S
L22
VSSIO_USB_2
B10
FC_ADQ12/GPIOD140
AJ24
VSSPL_SYS
M20
VSSIO_USB_3
K11
FC_ADQ13/GPIOD141
AJ25
VDDAN_11_CLK_1
K28
VSSIO_USB_4
B9
FC_ADQ14/GPIOD142
AG25
VDDAN_11_CLK_2
K29
VSSIO_USB_5
D10
FC_ADQ15/GPIOD143
AH26
VDDAN_11_CLK_3
J28
VSSIO_USB_6
D12
FC_INT1/GPIOD144
AF29
VDDAN_11_CLK_4
K26
VSSIO_USB_7
D14
FC_OE#/GPIOD145
AF28
VDDAN_11_CLK_5
J21
VSSIO_USB_8
D17
FC_AVD#/GPIOD146
AG29
VDDAN_11_CLK_6
J20
VSSIO_USB_9
E9
FC_INT2/GPIOD147
AH27
VDDAN_11_CLK_7
K21
VSSIO_USB_10
F9
FC_WE#/GPIOD148
AG26
VDDAN_11_CLK_8
J22
VSSIO_USB_11
F12
FC_CE1#/GPIOD149
AF27
USB Power
VSSIO_USB_12
F14
FC_CE2#/GPIOD150
AE29
VDDAN_33_USB_S_1
A18
VSSIO_USB_13
F16
VDDAN_33_USB_S_2
A19
VSSIO_USB_14
C9
No Connects
NC1
G27
VDDAN_33_USB_S_3
A20
VSSIO_USB_15
G11
NC2
Y2
VDDAN_33_USB_S_4
B18
VSSIO_USB_16
F18
VDDAN_33_USB_S_5
B19
VSSIO_USB_17
D9
Test/JTAG
TEST0
B3
VDDAN_33_USB_S_6
B20
VSSIO_USB_18
H12
TEST1/TMS
C4
VDDAN_33_USB_S_7
C18
VSSIO_USB_19
H14
TEST2
F6
VDDAN_33_USB_S_8
C20
VSSIO_USB_20
H16
EFUSE
Y4
VDDAN_33_USB_S_9
D18
VSSIO_USB_21
H18
USB_OC0#/TRST#/
GEVENT12#
F8
VDDAN_33_USB_S_10
D19
VSSIO_USB_22
J11
VDDAN_33_USB_S_11
D20
VSSIO_USB_23
J19
VDDAN_33_USB_S_12
E19
VSSIO_USB_24
K12
VSSIO_USB_25
K14
USB_OC1#/TDI/
GEVENT13#
E7
Pin Listing
131
47283 2.10 Dec 2010
AMD SB820M Southbridge Databook
System Pin Name
Ball
No.
System Pin Name
Ball
No.
System Pin Name
Ball
No.
VSSIO_USB_26
K16
VSSIO_PCIECLK_17
AA23
VSSIO_SATA_11
AG8
VSSIO_USB_27
K18
VSSIO_PCIECLK_18
AB23
VSSIO_SATA_12
AH7
VSSIO_USB_28
H19
VSSIO_PCIECLK_19
AD23
VSSIO_SATA_13
AH11
PCI Express Analog Power
VSSIO_PCIECLK_20
AA26
VSSIO_SATA_14
AH13
VDDPL_33_PCIE
AE28
VSSIO_PCIECLK_21
AC26
VSSIO_SATA_15
AH16
VDDAN_11_PCIE_1
U26
VSSIO_PCIECLK_22
Y20
VSSIO_SATA_16
AJ7
VDDAN_11_PCIE_2
V22
VSSIO_PCIECLK_23
W21
VSSIO_SATA_17
AJ11
VDDAN_11_PCIE_3
V26
VSSIO_PCIECLK_24
W20
VSSIO_SATA_18
AJ13
VDDAN_11_PCIE_4
V27
VSSIO_PCIECLK_25
AE26
VSSIO_SATA_19
AJ16
VDDAN_11_PCIE_5
V28
VSSIO_PCIECLK_26
L21
Core Power
VDDAN_11_PCIE_6
V29
VSSIO_PCIECLK_27
K20
VDDCR_11_1
N13
VDDAN_11_PCIE_7
W22
Serial ATA Analog Power
VDDCR_11_2
R15
VDDAN_11_PCIE_8
W26
VDDAN_11_SATA_1
AJ20
VDDCR_11_3
N17
VDDAN_11_SATA_2
AH20
VDDCR_11_4
U13
VDDAN_11_SATA_3
AG19
VDDCR_11_5
U17
VDDAN_11_SATA_4
AF18
VDDCR_11_6
V12
VDDAN_11_SATA_5
AE18
VDDCR_11_7
V18
VDDAN_11_SATA_6
AD18
VDDCR_11_8
W12
VDDAN_11_SATA_7
AE16
VDDCR_11_9
W18
VDDPL_33_SATA
AD14
3.3V I/O Power
®
PCI-E & CLKGEN Analog
Ground
VSSIO_PCIECLK_1
P21
VSSIO_PCIECLK_2
P20
VSSIO_PCIECLK_3
M22
VSSIO_PCIECLK_4
M24
VSSIO_PCIECLK_5
M26
VSSIO_PCIECLK_6
P22
VSSIO_PCIECLK_7
P24
VSSIO_PCIECLK_8
P26
VSSIO_PCIECLK_9
T20
VSSIO_PCIECLK_10
T22
VSSIO_PCIECLK_11
T24
VSSIO_PCIECLK_12
V20
VSSIO_PCIECLK_13
J23
VSSIO_PCIECLK_14
H23
VSSIO_PCIECLK_15
H26
VSSIO_PCIECLK_16
AA21
Serial ATA Analog Ground
VDDIO_33_PCIGP_1
AH1
VSSIO_SATA_1
Y14
VDDIO_33_PCIGP_2
V6
VSSIO_SATA_2
Y16
VDDIO_33_PCIGP_3
Y19
VSSIO_SATA_3
AB16
VDDIO_33_PCIGP_4
AE5
VSSIO_SATA_4
AC14
VDDIO_33_PCIGP_5
AC21
VSSIO_SATA_5
AE12
VDDIO_33_PCIGP_6
AA2
VSSIO_SATA_6
AE14
VDDIO_33_PCIGP_7
AB4
VSSIO_SATA_7
AF9
VDDIO_33_PCIGP_8
AC8
VSSIO_SATA_8
AF11
VDDIO_33_PCIGP_9
AA7
VSSIO_SATA_9
AF13
VDDIO_33_PCIGP_10
AA9
VSSIO_SATA_10
AF16
VDDIO_33_PCIGP_11
AF7
Pin Listing
132
47283 2.10 Dec 2010
System Pin Name
VDDIO_33_PCIGP_12
AMD SB820M Southbridge Databook
Ball
No.
AA19
IDE I/O Power
System Pin Name
Ball
No.
Digital Ground
System Pin Name
Ball
No.
VSS_27
AC9
VSS_1
AJ2
VSS_28
V8
VDDIO_18_FC_1
AF22
VSS_2
A28
VSS_29
W9
VDDIO_18_FC_2
AE25
VSS_3
A2
VSS_30
W10
VDDIO_18_FC_3
AF24
VSS_4
E5
VSS_31
AJ28
VDDIO_18_FC_4
AC22
VSS_5
D23
VSS_32
B29
VSS_6
E25
VSS_33
U4
VSS_7
E6
VSS_34
Y18
VSS_8
F24
VSS_35
Y10
HD Audio Power
VDDIO_AZ_S
M8
RGMII/MII Power
VDDIO_GBE_S_1
M6
VSS_9
N15
VSS_36
Y12
VDDIO_GBE_S_2
P8
VSS_10
R13
VSS_37
Y11
VDDIO_33_GBE_S
M10
VSS_11
R17
VSS_38
AA11
VDDRF_GBE_S
V1
VSS_12
T10
VSS_39
AA12
VDDCR_11_GBE_S_1
L7
VSS_13
P10
VSS_40
G4
VDDCR_11_GBE_S_2
L9
VSS_14
V11
VSS_41
J4
VSS_15
U15
VSS_42
G8
3.3V Standby Power
VDDIO_33_S_1
A21
VSS_16
M18
VSS_43
G9
VDDIO_33_S_2
D21
VSS_17
V19
VSS_44
M12
VDDIO_33_S_3
B21
VSS_18
M11
VSS_45
AF25
VDDIO_33_S_4
K10
VSS_19
L12
VSS_46
H7
VDDIO_33_S_5
L10
VSS_20
L18
VSS_47
AH29
VDDIO_33_S_6
J9
VSS_21
J7
VSS_48
V10
VDDIO_33_S_7
T6
VSS_22
P3
VSS_49
P6
VDDIO_33_S_8
T8
VSS_23
V4
VSS_50
N4
VSS_24
AD6
VSS_51
L4
VSS_52
L8
1.1V Standby Power
VDDCR_11_S_1
F26
VSS_25
AD4
VDDCR_11_S_2
G26
VSS_26
AB7
Pin Listing
133
47283 2.10 Dec 2010
AMD SB820M Southbridge Databook
Table 70. Pin List by Signal Name
System Pin Name
Ball
No.
System Pin Name
Ball
No.
14M_25M_48M_OSC
L25
AD20/GPIO20
AF1
25M_X1
L26
AD21/GPIO21
AG1
25M_X2
L27
AD22/GPIO22
AF2
32K_X1
C1
AD23/GPIO23
AE9
32K_X2
C2
AD24/GPIO24
AD9
A_RST#
L1
AD25/GPIO25
AC11
A_RX0N
AE23
AD26/GPIO26
AF6
A_RX0P
AE24
AD27/GPIO27
AF4
A_RX1N
AD24
AD28/GPIO28
AF3
A_RX1P
AD25
AD29/GPIO29
A_RX2N
AC25
A_RX2P
System Pin Name
Ball
No.
CLK_REQ0#/
SATA_IS3#/GPIO60
AC18
CLK_REQ1#/
FANOUT4/GPIO61
AB18
CLK_REQ2#/FANIN4/
GPIO62
AH21
CLK_REQ3#/
SATA_IS1#/GPIO63
AA16
CLK_REQ4#/
SATA_IS0#/GPIO64
AD19
AH2
CLK_REQG#/GPIO65/
OSCIN/IDLEEXT#
AA20
AD3/GPIO3
AB1
CLKRUN#
AB11
AC24
AD30/GPIO30
AG2
CPU_HT_CLKN
T21
A_RX3N
AB24
AD31/GPIO31
AH3
CPU_HT_CLKP
V21
A_RX3P
AB25
AD4/GPIO4
AA5
A_TX0N
AD27
AD5/GPIO5
AB2
DDR3_RST#/
GEVENT7#
H4
A_TX0P
AD26
AD6/GPIO6
AB6
DEVSEL#
AB9
A_TX1N
AC29
AD7/GPIO7
AB5
F25
A_TX1P
AC28
AD8/GPIO8
AA6
EC_PWM0/EC_TIME
R0/GPIO197
A_TX2N
AB28
AD9/GPIO9
AC2
E22
A_TX2P
AB29
G21
A_TX3N
AB27
ALLOW_LDTSTP/
DMA_ACTIVE#
EC_PWM1/EC_TIME
R1/GPIO198
F22
A_TX3P
AB26
AZ_BITCLK
M3
EC_PWM2/EC_TIME
R2/GPIO199
AD0/GPIO0
AA1
AZ_RST#
P2
EC_PWM3/EC_TIME
R3/GPIO200
E21
AD1/GPIO1
AA4
AZ_SDIN0/GPIO167
L2
EFUSE
Y4
AC3
AZ_SDIN1/GPIO168
M2
FANIN0/GPIO56
W7
AC4
AZ_SDIN2/GPIO169
M1
FANIN1/GPIO57
V9
AC1
AZ_SDIN3/GPIO170
M4
FANIN2/GPIO58
W8
AD1
AZ_SDOUT
N1
FANOUT0/GPIO52
W5
AD2
AZ_SYNC
N2
FANOUT1/GPIO53
W6
AD15/GPIO15
AC6
H3
FANOUT2/GPIO54
Y9
AD16/GPIO16
AE2
BLINK/USB_OC7#/
GEVENT18#
AJ27
AE1
AA8
FC_ADQ0/GPIOD128
AD17/GPIO17
CBE0#
AJ26
AF8
AD5
FC_ADQ1/GPIOD129
AD18/GPIO18
CBE1#
AE3
AD8
FC_ADQ10/
GPIOD138
AJ23
AD19/GPIO19
CBE2#
AD2/GPIO2
AA3
CBE3#
AA10
FC_ADQ11/
AF23
AD10/GPIO10
AD11/GPIO11
AD12/GPIO12
AD13/GPIO13
AD14/GPIO14
Pin Listing
134
47283 2.10 Dec 2010
System Pin Name
AMD SB820M Southbridge Databook
Ball
No.
GPIOD139
System Pin Name
Ball
No.
System Pin Name
Ball
No.
GBE_MDIO
L5
GPP_CLK6N
P28
GBE_PHY_INTR
V7
GPP_CLK6P
P29
GBE_PHY_PD
P4
GPP_CLK7N
N27
GBE_PHY_RST#
M9
GPP_CLK7P
N26
GBE_RXCLK
T9
GPP_CLK8N
T28
GBE_RXCTL/RXDV
T5
GPP_CLK8P
T29
GBE_RXD0
U2
GPP_RX0N
Y21
GBE_RXD1
T2
GPP_RX0P
AA22
FC_ADQ12/
GPIOD140
AJ24
FC_ADQ13/
GPIOD141
AJ25
FC_ADQ14/
GPIOD142
AG25
FC_ADQ15/
GPIOD143
AH26
FC_ADQ2/GPIOD130
AH25
GBE_RXD2
U3
GPP_RX1N
AA24
FC_ADQ3/GPIOD131
AH24
GBE_RXD3
U1
GPP_RX1P
AA25
FC_ADQ4/GPIOD132
AG23
GBE_RXERR
V5
GPP_TX0N
AA29
FC_ADQ5/GPIOD133
AH23
AA28
AJ22
K3
GPP_TX0P
FC_ADQ6/GPIOD134
GBE_STAT0/
GEVENT11#
GPP_TX1N
Y28
AG21
GBE_TXCLK
P5
GPP_TX1P
Y29
AF21
GBE_TXCTL/TXEN
M7
INTE#/GPIO32
AJ6
AH22
GBE_TXD0
P7
INTF#/GPIO33
AG6
AG29
GBE_TXD1
T7
INTG#/GPIO34
AG4
AF27
GBE_TXD2
P9
INTH#/GPIO35
AJ4
AE29
GBE_TXD3
M5
INTRUDER_ALERT#
B2
AH28
GEVENT5#
H2
FC_FBCLKIN
AF26
GNT0#
AD12
IR_LED#/LLB#/
GPIO184
E1
FC_FBCLKOUT
AG28
GNT1#/GPO44
AJ5
IR_RX1/GEVENT20#
F3
FC_INT1/GPIOD144
AF29
GNT2#/GPO45
AH6
IRDY#
AJ3
FC_INT2/GPIOD147
AH27
AB12
KBRST#/GEVENT1#
AE21
FC_OE#/GPIOD145
AF28
GNT3#/CLK_REQ7#/
GPIO46
KSI_0/GPIO201
G24
FC_RST#/GPO160
G29
GPP_CLK0N
L28
KSI_1/GPIO202
G25
FC_WE#/GPIOD148
AG26
GPP_CLK0P
L29
KSI_2/GPIO203
E28
FRAME#
AE8
GPP_CLK1N
N28
KSI_3/GPIO204
E29
GA20IN/GEVENT0#
AD21
GPP_CLK1P
N29
KSI_4/GPIO205
D29
GBE_COL
T1
GPP_CLK2N
M28
KSI_5/GPIO206
D28
GBE_CRS
T4
GPP_CLK2P
M29
KSI_6/GPIO207
C29
GBE_LED0/GPIO183
D5
GPP_CLK3N
V25
KSI_7/GPIO208
C28
GBE_LED1/
GEVENT9#
GPP_CLK3P
T25
D7
KSO_0/GPIO209
B28
GPP_CLK4N
L23
KSO_1/GPIO210
A27
GPP_CLK4P
L24
KSO_10/GPIO219
B24
GPP_CLK5N
M25
KSO_11/GPIO220
C24
GPP_CLK5P
P25
KSO_12/GPIO221
B23
FC_ADQ7/GPIOD135
FC_ADQ8/GPIOD136
FC_ADQ9/GPIOD137
FC_AVD#/GPIOD146
FC_CE1#/GPIOD149
FC_CE2#/GPIOD150
FC_CLK
GBE_LED2/
GEVENT10#
G5
GBE_MDCK
L6
Pin Listing
135
47283 2.10 Dec 2010
System Pin Name
AMD SB820M Southbridge Databook
Ball
No.
System Pin Name
Ball
No.
System Pin Name
Ball
No.
KSO_13/GPIO222
A23
NC10
Y27
REQ0#
AE11
KSO_14/GPIO223
D22
NC2
Y2
REQ1#/GPIO40
AH5
KSO_15/GPIO224
C22
NC3
V24
AH4
KSO_16/GPIO225
A22
NC4
W23
REQ2#/CLK_REQ8#/
GPIO41
KSO_17/GPIO226
B22
NC5
W24
AC12
KSO_2/GPIO211
B27
NC6
W25
REQ3#/CLK_REQ5#/
GPIO42
KSO_3/GPIO212
D26
NC7
W28
RI#/GEVENT22#
K1
KSO_4/GPIO213
A26
NC8
W29
ROM_RST#/GPIO161
G2
KSO_5/GPIO214
C26
NC9
Y26
RSMRST#
G1
KSO_6/GPIO215
A24
PAR
AC5
RTCCLK
D2
KSO_7/GPIO216
B25
SATA_ACT#/GPIO67
AD11
J2
KSO_8/GPIO217
A25
PCI_PME#/
GEVENT4#
SATA_CALRN
AA14
KSO_9/GPIO218
D24
PCICLK0
W2
SATA_CALRP
AB14
LAD0
J27
PCICLK1/GPO36
W1
AF20
LAD1
J26
PCICLK2/GPO37
W3
SATA_IS4#/FANOUT3
/GPIO55
LAD2
H29
PCICLK3/GPO38
W4
SATA_IS5#/FANIN3/
GPIO59
AE19
LAD3
H28
Y1
SATA_RX0N
AJ8
LDRQ0#
J25
PCICLK4/14M_OSC/
GPO39
AD28
SATA_RX0P
AH8
LDRQ1#/CLK_REQ6#/
GPIO49
PCIE_CALRN
AA18
PCIE_CALRP
AD29
SATA_RX1N
AG10
AF10
K19
P23
SATA_RX2N
AJ12
LDT_RST#
J24
PCIE_RCLKN/
NB_LNK_CLKN
SATA_RX1P
LDT_PG
AH12
G22
PCIE_RCLKP/
NB_LNK_CLKP
SATA_RX2P
LDT_STP#
M23
SATA_RX3N
AG14
LFRAME#
G28
PCIE_RST#
P1
SATA_RX3P
AF14
LOCK#
AD7
PCIRST#
V2
SATA_RX4N
AJ17
LPC_PME#/
GEVENT3#
K2
PERR#
AE6
SATA_RX4P
AH17
LPC_SMI#/
GEVENT23#
PROCHOT#
H21
SATA_RX5N
AH19
J29
E24
SATA_RX5P
AJ19
LPCCLK0
H24
PS2_CLK/SCL4/
GPIO188
SATA_TX0N
AJ9
LPCCLK1
H25
PS2_DAT/SDA4/
GPIO187
E23
SATA_TX0P
AH9
NB_DISP_CLKN
U28
PS2KB_CLK/GPIO190
F28
SATA_TX1N
AJ10
NB_DISP_CLKP
U29
PS2KB_DAT/GPIO189
D27
SATA_TX1P
AH10
NB_HT_CLKN
T27
PS2M_CLK/GPIO192
E27
SATA_TX2N
AF12
NB_HT_CLKP
T26
PS2M_DAT/GPIO191
F29
SATA_TX2P
AG12
NB_PWRGD
AC19
PWR_BTN#
F2
SATA_TX3N
AJ14
NC1
G27
PWR_GOOD
H5
SATA_TX3P
AH14
Pin Listing
136
47283 2.10 Dec 2010
System Pin Name
AMD SB820M Southbridge Databook
Ball
No.
System Pin Name
Ball
No.
System Pin Name
Ball
No.
SATA_TX4N
AF17
TEMP_COMM
C7
USB_HSD5P
D16
SATA_TX4P
AG17
TEMPIN0/GPIO171
B6
USB_HSD6N
G18
SATA_TX5N
AH18
TEMPIN1/GPIO172
A6
USB_HSD6P
G16
SATA_TX5P
AJ18
TEMPIN2/GPIO173
A5
USB_HSD7N
G14
SATA_X1
AD16
B5
USB_HSD7P
G12
SATA_X2
AC16
TEMPIN3/TALERT#/
GPIO174
USB_HSD8N
C13
AD22
TEST0
B3
USB_HSD8P
D13
F5
TEST1/TMS
C4
USB_HSD9N
B13
D25
TEST2
F6
USB_HSD9P
A13
SCL3_LV/GPIO195
B26
J6
AE22
USB_OC0#/TRST#/
GEVENT12#
F8
SDA0/GPIO47
THRMTRIP#/SMBALE
RT#/GEVENT2#
SDA1/GPIO228
F4
TRDY#
AE7
F23
J8
USB_OC1#/TDI/GEVE
NT13#
E7
SDA2/GPIO194
USB_FSD0N
SDA3_LV/GPIO196
E26
USB_FSD0P/
GPIO185
H9
USB_OC2#/TCK/GEV
ENT14#
F7
SERIRQ/GPIO48
AB19
USB_FSD1N
H11
SERR#
AE4
E8
SLP_S3#
F1
USB_FSD1P/
GPIO186
USB_OC3#/AC_PRES
/TDO/GEVENT15#
J10
D4
SLP_S5#
H1
USB_HSD0N
B16
USB_OC4#/IR_RX0/
GEVENT16#
SLT_GFX_CLKN
T23
USB_HSD0P
A16
E4
SLT_GFX_CLKP
V23
USB_HSD10N
J14
USB_OC5#/IR_TX0/
GEVENT17#
USB_HSD10P
J12
USB_OC6#/IR_TX1/
GEVENT6#
D1
USB_HSD11N
E12
USB_RCOMP
G19
USB_HSD11P
E14
USB_HSD12N
E11
USBCLK/
14M_25M_48M_OSC
A10
SCL0/GPIO43
SCL1/GPIO227
SCL2/GPIO193
SMARTVOLT1/
SATA_IS2#/GPIO50
AB21
SMARTVOLT2/
SHUTDOWN#/
GPIO51
AJ21
SPI_CLK/GPIO162
K4
USB_HSD12P
F11
VDDAN_11_CLK_1
K28
SPI_CS1#/GPIO165
K9
USB_HSD13N
A12
VDDAN_11_CLK_2
K29
SPI_CS2#/GBE_STAT
2/GPIO166
USB_HSD13P
B12
VDDAN_11_CLK_3
J28
F21
USB_HSD1N
A17
VDDAN_11_CLK_4
K26
SPI_CS3#/GBE_STAT
1/GEVENT21#
D3
USB_HSD1P
B17
VDDAN_11_CLK_5
J21
USB_HSD2N
J18
VDDAN_11_CLK_6
J20
SPI_DI/GPIO164
J5
USB_HSD2P
J16
VDDAN_11_CLK_7
K21
SPI_DO/GPIO163
E2
USB_HSD3N
E16
VDDAN_11_CLK_8
J22
SPKR/GPIO66
AF19
USB_HSD3P
E18
VDDAN_11_PCIE_1
U26
STOP#
AF5
USB_HSD4N
A14
VDDAN_11_PCIE_2
V22
SUS_STAT#
G6
USB_HSD4P
B14
VDDAN_11_PCIE_3
V26
SYS_RESET#/
GEVENT19#
J1
USB_HSD5N
C16
VDDAN_11_PCIE_4
V27
Pin Listing
137
47283 2.10 Dec 2010
System Pin Name
AMD SB820M Southbridge Databook
Ball
No.
System Pin Name
Ball
No.
System Pin Name
Ball
No.
VDDAN_11_PCIE_5
V28
VDDCR_11_8
W12
VDDPL_11_SYS_S
L22
VDDAN_11_PCIE_6
V29
VDDCR_11_9
W18
VDDPL_33_PCIE
AE28
VDDAN_11_PCIE_7
W22
VDDCR_11_GBE_S_1
L7
VDDPL_33_SATA
AD14
VDDAN_11_PCIE_8
W26
VDDCR_11_GBE_S_2
L9
VDDPL_33_SYS
M21
VDDAN_11_SATA_1
AJ20
VDDCR_11_S_1
F26
VDDPL_33_USB_S
F19
VDDAN_11_SATA_2
AH20
VDDCR_11_S_2
G26
VDDRF_GBE_S
V1
VDDAN_11_SATA_3
AG19
VDDCR_11_USB_S_1
A11
VDDXL_33_S
L20
VDDAN_11_SATA_4
AF18
VDDCR_11_USB_S_2
B11
VIN0/GPIO175
A3
VDDAN_11_SATA_5
AE18
VDDIO_18_FC_1
AF22
VIN1/GPIO176
B4
VDDAN_11_SATA_6
AD18
VDDIO_18_FC_2
AE25
VIN2/GPIO177
A4
VDDAN_11_SATA_7
AE16
VDDIO_18_FC_3
AF24
VIN3/GPIO178
C5
VDDAN_11_USB_S_1
C11
VDDIO_18_FC_4
AC22
VIN4/GPIO179
A7
VDDAN_11_USB_S_2
D11
VDDIO_33_GBE_S
M10
VIN5/GPIO180
B7
VDDAN_33_HWM_S
D6
VDDIO_33_PCIGP_1
AH1
B8
VDDAN_33_USB_S_1
A18
VDDIO_33_PCIGP_10
AA9
VIN6/GBE_STAT3/
GPIO181
VDDAN_33_USB_S_1
0
D19
VDDIO_33_PCIGP_11
AF7
A8
VDDIO_33_PCIGP_12
AA19
VIN7/GBE_LED3/
GPIO182
VDDAN_33_USB_S_1
1
VDDIO_33_PCIGP_2
V6
VSS_1
AJ2
D20
Y19
VSS_10
R13
VDDAN_33_USB_S_1
2
VDDIO_33_PCIGP_3
E19
VDDIO_33_PCIGP_4
AE5
VSS_11
R17
AC21
T10
A19
VDDIO_33_PCIGP_5
VSS_12
VDDAN_33_USB_S_2
AA2
P10
A20
VDDIO_33_PCIGP_6
VSS_13
VDDAN_33_USB_S_3
AB4
V11
B18
VDDIO_33_PCIGP_7
VSS_14
VDDAN_33_USB_S_4
AC8
U15
B19
VDDIO_33_PCIGP_8
VSS_15
VDDAN_33_USB_S_5
AA7
M18
B20
VDDIO_33_PCIGP_9
VSS_16
VDDAN_33_USB_S_6
A21
V19
C18
VDDIO_33_S_1
VSS_17
VDDAN_33_USB_S_7
D21
M11
C20
VDDIO_33_S_2
VSS_18
VDDAN_33_USB_S_8
B21
L12
D18
VDDIO_33_S_3
VSS_19
VDDAN_33_USB_S_9
K10
A28
B1
VDDIO_33_S_4
VSS_2
VDDBT_RTC_G
L10
L18
N13
VDDIO_33_S_5
VSS_20
VDDCR_11_1
J9
J7
R15
VDDIO_33_S_6
VSS_21
VDDCR_11_2
T6
P3
N17
VDDIO_33_S_7
VSS_22
VDDCR_11_3
T8
V4
U13
VDDIO_33_S_8
VSS_23
VDDCR_11_4
M8
AD6
U17
VDDIO_AZ_S
VSS_24
VDDCR_11_5
M6
AD4
V12
VDDIO_GBE_S_1
VSS_25
VDDCR_11_6
P8
AB7
V18
VDDIO_GBE_S_2
VSS_26
VDDCR_11_7
VSS_27
AC9
Pin Listing
138
47283 2.10 Dec 2010
System Pin Name
AMD SB820M Southbridge Databook
Ball
No.
System Pin Name
Ball
No.
System Pin Name
Ball
No.
VSS_28
V8
VSSIO_PCIECLK_12
V20
VSSIO_SATA_3
AB16
VSS_29
W9
VSSIO_PCIECLK_13
J23
VSSIO_SATA_4
AC14
VSS_3
A2
VSSIO_PCIECLK_14
H23
VSSIO_SATA_5
AE12
VSS_30
W10
VSSIO_PCIECLK_15
H26
VSSIO_SATA_6
AE14
VSS_31
AJ28
VSSIO_PCIECLK_16
AA21
VSSIO_SATA_7
AF9
VSS_32
B29
VSSIO_PCIECLK_17
AA23
VSSIO_SATA_8
AF11
VSS_33
U4
VSSIO_PCIECLK_18
AB23
VSSIO_SATA_9
AF13
VSS_34
Y18
VSSIO_PCIECLK_19
AD23
VSSIO_USB_1
A9
VSS_35
Y10
VSSIO_PCIECLK_2
P20
VSSIO_USB_10
F9
VSS_36
Y12
VSSIO_PCIECLK_20
AA26
VSSIO_USB_11
F12
VSS_37
Y11
VSSIO_PCIECLK_21
AC26
VSSIO_USB_12
F14
VSS_38
AA11
VSSIO_PCIECLK_22
Y20
VSSIO_USB_13
F16
VSS_39
AA12
VSSIO_PCIECLK_23
W21
VSSIO_USB_14
C9
VSS_4
E5
VSSIO_PCIECLK_24
W20
VSSIO_USB_15
G11
VSS_40
G4
VSSIO_PCIECLK_25
AE26
VSSIO_USB_16
F18
VSS_41
J4
VSSIO_PCIECLK_26
L21
VSSIO_USB_17
D9
VSS_42
G8
VSSIO_PCIECLK_27
K20
VSSIO_USB_18
H12
VSS_43
G9
VSSIO_PCIECLK_3
M22
VSSIO_USB_19
H14
VSS_44
M12
VSSIO_PCIECLK_4
M24
VSSIO_USB_2
B10
VSS_45
AF25
VSSIO_PCIECLK_5
M26
VSSIO_USB_20
H16
VSS_46
H7
VSSIO_PCIECLK_6
P22
VSSIO_USB_21
H18
VSS_47
AH29
VSSIO_PCIECLK_7
P24
VSSIO_USB_22
J11
VSS_48
V10
VSSIO_PCIECLK_8
P26
VSSIO_USB_23
J19
VSS_49
P6
VSSIO_PCIECLK_9
T20
VSSIO_USB_24
K12
VSS_5
D23
VSSIO_SATA_1
Y14
VSSIO_USB_25
K14
VSS_50
N4
VSSIO_SATA_10
AF16
VSSIO_USB_26
K16
VSS_51
L4
VSSIO_SATA_11
AG8
VSSIO_USB_27
K18
VSS_52
L8
VSSIO_SATA_12
AH7
VSSIO_USB_28
H19
VSS_6
E25
VSSIO_SATA_13
AH11
VSSIO_USB_3
K11
VSS_7
E6
VSSIO_SATA_14
AH13
VSSIO_USB_4
B9
VSS_8
F24
VSSIO_SATA_15
AH16
VSSIO_USB_5
D10
VSS_9
N15
VSSIO_SATA_16
AJ7
VSSIO_USB_6
D12
VSSAN_HWM
D8
VSSIO_SATA_17
AJ11
VSSIO_USB_7
D14
VSSIO_PCIECLK_1
P21
VSSIO_SATA_18
AJ13
VSSIO_USB_8
D17
VSSIO_PCIECLK_10
T22
VSSIO_SATA_19
AJ16
VSSIO_USB_9
E9
VSSIO_PCIECLK_11
T24
VSSIO_SATA_2
Y16
VSSPL_SYS
M20
Pin Listing
139
47283 2.10 Dec 2010
System Pin Name
AMD SB820M Southbridge Databook
Ball
No.
VSSXL
M19
WAKE#/GEVENT8#
H6
Pin Listing
140
47283 2.10 Dec 2010
AMD SB820M Southbridge Databook
Pin Listing
141