MICREL KSZ8862

KSZ8862-16/32MQL
2-Port Ethernet Switch with Non-PCI Interface
and Fiber Support
Rev 3.1
General Description
The KSZ8862M is 2-port switch with non-PCI CPU
interface and fiber support, and is available in 8/16-bit
and 32-bit bus designs (see Ordering Information). This
datasheet describes the KSZ8862M non-PCI CPU
interface chip.
The KSZ8862M is the industry’s first fully managed, 2port switch with a non-PCI CPU interface and fiber
th
support. It is based on a proven, 4 generation,
integrated Layer-2 switch, compliant with IEEE 802.3u
standards.
For industrial applications, the KSZ8862M can run in
half-duplex mode regardless of the application.
In fiber mode, port 1 can be configurable to either
100BASE-FX or 100BASE-SX/10BASE-FL.
The LED driver and post amplifier are also included for
10Base-FL and 100Base-SX applications.
®
LinkMD
In copper mode, port 2 supports 10/100BASE-T/TX with
HP Auto MDI/MDI-X for reliable detection of and
correction for straight-through and crossover cables.
®
Micrel’s
proprietary
LinkMD
Time
Domain
Reflectometry (TDR)-based function is also available for
determining the cable length, as well as cable
diagnostics for identifying faulty cabling.
The KSZ8862M offers an extensive feature set that
includes tag/port-based VLAN, quality of service (QoS)
priority management, management information base
(MIB) counters, and CPU control/data interfaces to
effectively address Fast Ethernet applications.
The KSZ8862M contains: Two 10/100 transceivers with
patented, mixed-signal, low-power technology, two
media access control (MAC) units, a direct memory
access (DMA) channel, a high-speed, non-blocking,
switch fabric, a dedicated 1K entry forwarding table, and
an on-chip frame buffer memory.
Functional Diagram
TX
P o rt 1
F ib e r
RX
E m bedded
P r o c e s s o r In te r fa c e
1 0 /1 0 0 B a s e F L /F X /S X
PHY 1
Post
Am p
1 0 /1 0 0 B a s e T /T X
PHY 2
N o n -P C I
CPU
Bus
In t e r f a c e
U n it
QMU
DMA
C hannel
P 1 L E D [3 :0 ]
P 2 L E D [3 :0 ]
1 0 /1 0 0
MAC 2
RXQ
4K B
TXQ
4K B
C o n tr o l
R e g is te rs
8 ,1 6 , o r 3 2 -b it
G e n e ric H o s t
In t e r f a c e
1 K lo o k -u p
E n g in e
1 0 /1 0 0
MAC 1
S w it c h
H ost
MAC
FIFO, Flow Control, VLAN Tagging ,Priority
P o rt 2
Copper
LED
D r iv e r
S c h e d u lin g
M anagem ent
B u ffe r
M anagem ent
F ra m e
B u ffe rs
M IB
C o u n te rs
LED
D riv e r s
EEPROM
In te rfa c e
E E P R O M I/F
Figure 1. KSZ8862M Functional Diagram
LinkMD is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
August 2010
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Features
• Per port-based, software power-save on PHY (idle
link detection, register configuration preserved)
• Single power supply: 3.3V
• Commercial Temperature Range: 0oC to +70oC
Switch Management
• Non-blocking switch fabric assures fast packet
delivery by utilizing a 1K entry forwarding table and a
store-and-forward architecture
• Fully compliant with IEEE 802.3u standards
• Full-duplex IEEE 802.3x flow control (Pause) with
force mode option
• Half-duplex back pressure flow control
• Industrial Temperature Range: –40oC to +85oC
(see Ordering Information).
• Available in 128-pin PQFP
• Available in –16 version for 8/16-bit bus support and –
32 version for 32-bit bus support (see Ordering
Information).
Advanced Switch Management
• IEEE 802.1Q VLAN support for up to 16 groups (full
range of VLAN IDs)
• VLAN ID tag/untag options, on a per port basis
• IEEE 802.1p/Q tag insertion or removal on a per port
basis (egress)
• Programmable rate limiting at the ingress and egress
ports
• Broadcast storm protection
• IEEE 802.1d spanning tree protocol support
• MAC filtering function to filter or forward unknown
unicast packets
• Direct forwarding mode enabling the processor to
identify the ingress port and to specify the egress port
• Internet Group Management Protocol (IGMP) v1/v2
snooping support for multicast packet filtering
• IPV6 Multicast Listener Discovery (MLD) snooping
support
Additional Features
In addition to offering all of the features of an integrated
Layer-2 managed switch, the KSZ8862M offers:
• Dynamic buffer memory scheme
– Essential for applications such as Video over IP
where image jitter is unacceptable
• 2-port switch with a flexible 8, 16, or 32-bit generic
host processor interfaces
®
• Micrel LinkMD cable diagnostics to determine cable
length, diagnose faulty cables, and determine
distance-to-fault
• Hewlett Packard (HP) Auto-MDIX crossover with
disable and enable options
• Four priority queues to handle voice, video, data, and
control packets
• Ability to transmit and receive jumbo frame sizes up to
1916 bytes
Fiber Support
• Integrated LED driver and post amplifier for 10BASEFL and 100BASE-SX optical modules
• 100BASE-FX/SX and 10BASE-FL fiber support on
port 1
Applications
•
•
•
•
Monitoring
• Port mirroring/monitoring/sniffing: ingress and/or
egress traffic to any port
• MIB counters for fully compliant statistics gathering –
34 MIB counters per port
• Loopback modes for remote failure diagnostics
•
•
•
Comprehensive Register Access
• Control registers configurable on-the-fly (port-priority,
802.1p/d/Q)
•
Markets
QoS/CoS Packets Prioritization Support
• Per port, 802.1p and DiffServ-based
• Remapping of 802.1p priority field on a per port basis
•
•
•
Power Modes, Packaging, and Power Supplies
• Full-chip hardware power-down (register configuration
not saved) allows low power dissipation
August 2010
Video Distribution Systems
High-end Cable, Satellite, and IP set-top boxes
Video over IP
Voice over IP (VoIP) and Analog Telephone Adapters
(ATA)
Industrial Control in Latency Critical Applications
Motion Control
Industrial Control Sensor Devices (Temperature,
Pressure, Levels, and Valves)
Security and Surveillance Cameras
2
Fast Ethernet
Embedded Ethernet
Industrial Ethernet
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Ordering Information
Part Number
Temperature Range
KSZ8862-16MQL-FX
Package
Comment
o
o
128-Pin PQFP
Port 1 operates on 100BASE-FX mode only
o
o
128-Pin PQFP
Port 1 operates on 10BASE-FL or
100BASE-SX mode only
o
o
128-Pin PQFP
Port 1 operates on 100BASE-FX mode only
o
o
128-Pin PQFP
Port 1 operates on 10BASE-FL or
100BASE-SX mode only
0 C to 70 C
KSZ8862-16MQL
0 C to 70 C
KSZ8862-32MQL-FX
0 C to 70 C
KSZ8862-32MQL
0 C to 70 C
KSZ8862-100FX-EVAL
Evaluation Board for the KSZ8862-16MQL at 100FX Mode
KSZ8862-10FL-EVAL
Evaluation Board for the KSZ8862-16MQL at 100SX_10FL Mode
Revision History
Revision
Date
Summary of Changes
1.0
07/18/06
First released Information
2.0
09/13/06
Added evaluation ordering info. to Ordering Information Table
3.0
04/04/07
Updated part ordering info. to Ordering Information Table
Improve the ARDY low time in read cycle to 40ns and in write cycle to 50 ns during QMU
data register access
3.1
8/13/10
Changed the FL/SX part order information
August 2010
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M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Content
General Description ........................................................................................................................................................1
Functional Diagram.........................................................................................................................................................1
Features ...........................................................................................................................................................................2
Applications.....................................................................................................................................................................2
Markets.............................................................................................................................................................................2
Ordering Information ......................................................................................................................................................3
Revision History ..............................................................................................................................................................3
Content.............................................................................................................................................................................4
List of Figures..................................................................................................................................................................9
List of Tables .................................................................................................................................................................10
Pin Configuration for KSZ8862-16MQL (8/16-Bit) ......................................................................................................11
Pin Description for KSZ8862-16MQL (8/16-Bit) ..........................................................................................................12
Pin Configuration for KSZ8862-32MQL (32-Bit) .........................................................................................................17
Pin Description for KSZ8862-32 MQL (32-Bit) ............................................................................................................18
Functional Description .................................................................................................................................................23
Functional Overview: Physical Layer Transceiver ....................................................................................................23
100BASE-TX Transmit............................................................................................................................................................. 23
100BASE-TX Receive.............................................................................................................................................................. 23
Scrambler/De-scrambler (100BASE-TX only) .......................................................................................................................... 23
100BASE-FX Operation........................................................................................................................................................... 23
100BASE-FX Signal Detection................................................................................................................................................. 23
100BASE-FX Far-End-Fault (FEF) .......................................................................................................................................... 24
100BASE-SX Operation........................................................................................................................................................... 24
Physical Interface ................................................................................................................................................................ 24
Enabling 100BASE-SX Mode .............................................................................................................................................. 24
Enabling Fiber Forced Mode .............................................................................................................................................. 24
10BASE-FL Operation ............................................................................................................................................................. 24
Physical Interface ................................................................................................................................................................ 24
Enabling 10BASE-FL Mode ................................................................................................................................................ 24
Enabling Fiber Forced Mode .............................................................................................................................................. 24
10BASE-T Transmit ................................................................................................................................................................. 25
10BASE-T Receive .................................................................................................................................................................. 25
LED Driver ............................................................................................................................................................................... 25
Post Amplifier........................................................................................................................................................................... 25
Power Management................................................................................................................................................................. 25
MDI/MDI-X Auto Crossover...................................................................................................................................................... 25
Straight Cable ...................................................................................................................................................................... 26
Crossover Cable .................................................................................................................................................................. 26
Auto Negotiation ...................................................................................................................................................................... 27
®
LinkMD Cable Diagnostics ..................................................................................................................................................... 28
Access.................................................................................................................................................................................. 28
Usage.................................................................................................................................................................................... 28
Functional Overview: MAC and Switch ......................................................................................................................29
Address Lookup ....................................................................................................................................................................... 29
Learning................................................................................................................................................................................... 29
Migration .................................................................................................................................................................................. 29
Aging........................................................................................................................................................................................ 29
Forwarding ............................................................................................................................................................................... 30
Switching Engine ..................................................................................................................................................................... 32
MAC Operation ........................................................................................................................................................................ 32
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KSZ8862-16/32MQL
Inter Packet Gap (IPG) ............................................................................................................................................................ 32
Back-Off Algorithm................................................................................................................................................................... 32
Late Collision ........................................................................................................................................................................... 32
Legal Packet Size .................................................................................................................................................................... 32
Flow Control............................................................................................................................................................................. 32
Half-Duplex Backpressure ....................................................................................................................................................... 32
Broadcast Storm Protection ..................................................................................................................................................... 33
Clock Generator....................................................................................................................................................................... 33
Bus Interface Unit (BIU)................................................................................................................................................33
Asynchronous Interface ........................................................................................................................................................... 35
Synchronous Interface ............................................................................................................................................................. 36
Summary.................................................................................................................................................................................. 36
BIU Implementation Principles ................................................................................................................................................. 37
Queue Management Unit (QMU) ..................................................................................................................................38
Transmit Queue (TXQ) Frame Format..................................................................................................................................... 38
Receive Queue (RXQ) Frame Format ..................................................................................................................................... 39
Advanced Switch Functions ........................................................................................................................................41
Spanning Tree Support............................................................................................................................................................ 41
IGMP Support .......................................................................................................................................................................... 42
“IGMP” Snooping................................................................................................................................................................... 42
“Multicast Address Insertion” in the Static MAC Table........................................................................................................... 42
IPv6 MLD Snooping ................................................................................................................................................................. 42
Port Mirroring Support.............................................................................................................................................................. 42
IEEE 802.1Q VLAN Support .................................................................................................................................................... 43
QoS Priority Support ................................................................................................................................................................ 43
Port-Based Priority................................................................................................................................................................... 43
802.1p-Based Priority .............................................................................................................................................................. 43
DiffServ-Based Priority............................................................................................................................................................. 44
Rate Limiting Support .............................................................................................................................................................. 44
MAC Filtering Function ............................................................................................................................................................ 45
Configuration Interface............................................................................................................................................................. 45
EEPROM Interface .................................................................................................................................................................. 45
Loopback Support.................................................................................................................................................................... 46
Far-end Loopback ............................................................................................................................................................... 46
Near-end (Remote) Loopback............................................................................................................................................. 46
CPU Interface I/O Registers .........................................................................................................................................48
I/O Registers ............................................................................................................................................................................ 48
Internal I/O Space Mapping ..................................................................................................................................................... 49
Register Map: Switch and MAC/PHY...........................................................................................................................57
Bit Type Definition.................................................................................................................................................................... 57
Bank 0-63 Bank Select Register (0x0E): BSR (same location in all Banks)............................................................................. 57
Bank 0 Base Address Register (0x00): BAR............................................................................................................................ 57
Bank 0 QMU RX Flow Control High Watermark Configuration Register (0x04): QRFCR ........................................................ 57
Bank 0 Bus Error Status Register (0x06): BESR ..................................................................................................................... 58
Bank 0 Bus Burst Length Register (0x08): BBLR..................................................................................................................... 58
Bank 1 Reserved ..................................................................................................................................................................... 58
Bank 2 Host MAC Address Register Low (0x00): MARL ......................................................................................................... 58
Bank 2 Host MAC Address Register Middle (0x02): MARM..................................................................................................... 59
Bank 2 Host MAC Address Register High (0x04): MARH ........................................................................................................ 59
Bank 3 On-Chip Bus Control Register (0x00): OBCR .............................................................................................................. 59
Bank 3 EEPROM Control Register (0x02): EEPCR ................................................................................................................. 60
Bank 3 Memory BIST INFO Register (0x04): MBIR ................................................................................................................. 60
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KSZ8862-16/32MQL
Bank 3 Global Reset Register (0x06): GRR............................................................................................................................. 60
Bank 3 Bus Configuration Register (0x08): BCFG ................................................................................................................... 61
Banks 4 – 15: Reserved........................................................................................................................................................... 61
Bank 16 Transmit Control Register (0x00): TXCR ................................................................................................................... 61
Bank 16 Transmit Status Register (0x02): TXSR..................................................................................................................... 61
Bank 16 Receive Control Register (0x04): RXCR.................................................................................................................... 62
Bank 16 TXQ Memory Information Register (0x08): TXMIR .................................................................................................... 62
Bank 16 RXQ Memory Information Register (0x0A): RXMIR ................................................................................................... 63
Bank 17 TXQ Command Register (0x00): TXQCR .................................................................................................................. 63
Bank 17 RXQ Command Register (0x02): RXQCR ................................................................................................................. 63
Bank 17 TX Frame Data Pointer Register (0x04): TXFDPR .................................................................................................... 63
Bank 17 RX Frame Data Pointer Register (0x06): RXFDPR.................................................................................................... 64
Bank 17 QMU Data Register Low (0x08): QDRL ..................................................................................................................... 64
Bank 17 QMU Data Register High (0x0A): QDRH ................................................................................................................... 64
Bank 18 Interrupt Enable Register (0x00): IER ........................................................................................................................ 65
Bank 18 Interrupt Status Register (0x02): ISR ......................................................................................................................... 66
Bank 18 Receive Status Register (0x04): RXSR ..................................................................................................................... 67
Bank 18 Receive Byte Counter Register (0x06): RXBC........................................................................................................... 67
Bank 19 Multicast Table Register 0 (0x00): MTR0................................................................................................................... 68
Bank 19 Multicast Table Register 1 (0x02): MTR1................................................................................................................... 68
Bank 19 Multicast Table Register 2 (0x04): MTR2................................................................................................................... 68
Bank 19 Multicast Table Register 3 (0x06): MTR3................................................................................................................... 68
Banks 20 – 31: Reserved......................................................................................................................................................... 68
Bank 32 Switch ID and Enable Register (0x00): SIDER .......................................................................................................... 69
Bank 32 Switch Global Control Register 1 (0x02): SGCR1...................................................................................................... 69
Bank 32 Switch Global Control Register 2 (0x04): SGCR2...................................................................................................... 70
Bank 32 Switch Global Control Register 3 (0x06): SGCR3...................................................................................................... 71
Bank 32 Switch Global Control Register 4 (0x08): SGCR4...................................................................................................... 71
Bank 32 Switch Global Control Register 5 (0x0A): SGCR5 ..................................................................................................... 72
Bank 33 Switch Global Control Register 6 (0x00): SGCR6...................................................................................................... 73
Bank 33 Switch Global Control Register 7 (0x02): SGCR7...................................................................................................... 73
Banks 34 – 38: Reserved......................................................................................................................................................... 73
Bank 39 MAC Address Register 1 (0x00): MACAR1 ............................................................................................................... 74
Bank 39 MAC Address Register 2 (0x02): MACAR2 ............................................................................................................... 74
Bank 39 MAC Address Register 3 (0x04): MACAR3 ............................................................................................................... 74
Bank 40 TOS Priority Control Register 1 (0x00): TOSR1 ........................................................................................................ 74
Bank 40 TOS Priority Control Register 2 (0x02): TOSR2 ........................................................................................................ 75
Bank 40 TOS Priority Control Register 3 (0x04): TOSR3 ........................................................................................................ 75
Bank 40 TOS Priority Control Register 4 (0x06): TOSR4 ........................................................................................................ 76
Bank 40 TOS Priority Control Register 5 (0x08): TOSR5 ........................................................................................................ 76
Bank 40 TOS Priority Control Register 6 (0x0A): TOSR6 ........................................................................................................ 77
Bank 41 TOS Priority Control Register 7 (0x00): TOSR7 ........................................................................................................ 77
Bank 41 TOS Priority Control Register 8 (0x02): TOSR8 ........................................................................................................ 78
Bank 42 Indirect Access Control Register (0x00): IACR .......................................................................................................... 78
Bank 42 Indirect Access Data Register 1 (0x02): IADR1 ......................................................................................................... 79
Bank 42 Indirect Access Data Register 2 (0x04): IADR2 ......................................................................................................... 79
Bank 42 Indirect Access Data Register 3 (0x06): IADR3 ......................................................................................................... 79
Bank 42 Indirect Access Data Register 4 (0x08): IADR4 ......................................................................................................... 79
Bank 42 Indirect Access Data Register 5 (0x0A): IADR5......................................................................................................... 79
Bank 43: Reserved .................................................................................................................................................................. 79
Bank 44 Digital Testing Status Register (0x00): DTSR............................................................................................................ 80
Bank 44 Analog Testing Status Register (0x02): ATSR ........................................................................................................... 80
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KSZ8862-16/32MQL
Bank 44 Digital Testing Control Register (0x04): DTCR .......................................................................................................... 80
Bank 44 Analog Testing Control Register 0 (0x06): ATCR0 .................................................................................................... 80
Bank 44 Analog Testing Control Register 1 (0x08): ATCR1 .................................................................................................... 80
Bank 44 Analog Testing Control Register 2 (0x0A): ATCR2 .................................................................................................... 80
Bank 45 PHY 1 MII-Register Basic Control Register (0x00): P1MBCR ................................................................................... 80
Bank 45 PHY 1 MII-Register Basic Status Register (0x02): P1MBSR ..................................................................................... 82
Bank 45 PHY 1 PHYID Low Register (0x04): PHY1ILR........................................................................................................... 82
Bank 45 PHY 1 PHYID High Register (0x06): PHY1IHR ......................................................................................................... 82
Bank 45 PHY 1 Auto-Negotiation Advertisement Register (0x08): P1ANAR ........................................................................... 83
Bank 45 PHY 1 Auto-Negotiation Link Partner Ability Register (0x0A): P1ANLPR .................................................................. 83
Bank 46 PHY 2 MII-Register Basic Control Register (0x00): P2MBCR ................................................................................... 84
Bank 46 PHY 2 MII-Register Basic Status Register (0x02): P2MBSR ..................................................................................... 85
Bank 46 PHY 2 PHYID Low Register (0x04): PHY2ILR........................................................................................................... 85
Bank 46 PHY 2 PHYID High Register (0x06): PHY2IHR ......................................................................................................... 85
Bank 46 PHY 2 Auto-Negotiation Advertisement Register (0x08): P2ANAR ........................................................................... 86
Bank 46 PHY 2 Auto-Negotiation Link Partner Ability Register (0x0A): P2ANLPR .................................................................. 86
Bank 47 PHY1 Special Control/Status Register (0x02): P1PHYCTRL..................................................................................... 87
®
Bank 47 PHY2 LinkMD Control/Status (0x04): P2VCT .......................................................................................................... 87
Bank 47 PHY2 Special Control/Status Register (0x06): P2PHYCTRL..................................................................................... 88
Bank 48 Port 1 Control Register 1 (0x00): P1CR1................................................................................................................... 88
Bank 48 Port 1 Control Register 2 (0x02): P1CR2................................................................................................................... 89
Bank 48 Port 1 VID Control Register (0x04): P1VIDCR........................................................................................................... 90
Bank 48 Port 1 Control Register 3 (0x06): P1CR3................................................................................................................... 90
Bank 48 Port 1 Ingress Rate Control Register (0x08): P1IRCR ............................................................................................... 91
Bank 48 Port 1 Egress Rate Control Register (0x0A): P1ERCR.............................................................................................. 93
®
Bank 49 Port 1 PHY Special Control/Status, LinkMD (0x00): P1SCSLMD ............................................................................ 95
Bank 49 Port 1 Control Register 4 (0x02): P1CR4................................................................................................................... 95
Bank 49 Port 1 Status Register (0x04): P1SR ......................................................................................................................... 96
Bank 50 Port 2 Control Register 1 (0x00): P2CR1................................................................................................................... 97
Bank 50 Port 2 Control Register 2 (0x02): P2CR2................................................................................................................... 97
Bank 50 Port 2 VID Control Register (0x04): P2VIDCR........................................................................................................... 97
Bank 50 Port 2 Control Register 3 (0x06): P2CR3................................................................................................................... 97
Bank 50 Port 2 Ingress Rate Control Register (0x08): P2IRCR ............................................................................................... 97
Bank 50 Port 2 Egress Rate Control Register (0x0A): P2ERCR.............................................................................................. 97
®
Bank 51 Port 2 PHY Special Control/Status, LinkMD (0x00): P2SCSLMD ............................................................................ 98
Bank 51 Port 2 Control Register 4 (0x02): P2CR4................................................................................................................... 99
Bank 51 Port 2 Status Register (0x04): P2SR ....................................................................................................................... 100
Bank 52 Host Port Control Register 1 (0x00): P3CR1 ........................................................................................................... 101
Bank 52 Host Port Control Register 2 (0x02): P3CR2 ........................................................................................................... 101
Bank 52 Host Port VID Control Register (0x04): P3VIDCR.................................................................................................... 102
Bank 52 Host Port Control Register 3 (0x06): P3CR3 ........................................................................................................... 102
Bank 52 Host Port Ingress Rate Control Register (0x08): P3IRCR........................................................................................ 102
Bank 52 Host Port Egress Rate Control Register (0x0A): P3ERCR ...................................................................................... 102
Banks 53 – 63: Reserved....................................................................................................................................................... 102
MIB (Management Information Base) Counters.......................................................................................................103
Format of “All Ports Dropped Packet” MIB Counters ............................................................................................................. 104
Additional MIB Information..................................................................................................................................................... 105
Static MAC Address Table .........................................................................................................................................106
Static MAC Table Lookup Examples:
106
Dynamic MAC Address Table ....................................................................................................................................107
Dynamic MAC Address Lookup Example: ............................................................................................................................. 107
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KSZ8862-16/32MQL
VLAN Table ..................................................................................................................................................................108
VLAN Table Lookup Examples: ............................................................................................................................................. 108
(1)
Absolute Maximum Ratings ....................................................................................................................................109
(1)
Operating Ratings ....................................................................................................................................................109
(1)
Electrical Characteristics ........................................................................................................................................110
Timing Specifications .................................................................................................................................................111
Asynchronous Timing without using Address Strobe (ADSN = 0).......................................................................................... 111
Asynchronous Timing Using Address Strobe (ADSN) ........................................................................................................... 112
Asynchronous Timing Using DATACSN ................................................................................................................................ 113
Address Latching Timing for All Modes.................................................................................................................................. 114
Synchronous Timing in Burst Write (VLBUSN = 1) ................................................................................................................ 115
Synchronous Timing in Burst Read (VLBUSN = 1)................................................................................................................ 116
Synchronous Write Timing (VLBUSN = 0) ............................................................................................................................. 117
Synchronous Read Timing (VLBUSN = 0) ............................................................................................................................. 118
EEPROM Timing.................................................................................................................................................................... 119
Auto Negotiation Timing......................................................................................................................................................... 120
Reset Timing.......................................................................................................................................................................... 121
Selection of Isolation Transformers..........................................................................................................................122
Selection of Reference Crystal ..................................................................................................................................122
Package Information ...................................................................................................................................................123
Acronyms and Glossary.............................................................................................................................................124
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KSZ8862-16/32MQL
List of Figures
Figure 1. KSZ8862M Functional Diagram .................................................................................................................................... 1
Figure 2. Standard – KSZ8862-16 MQL 128-Pin PQFP (Top View) ...................................................................................... 11
Figure 3. Standard – KSZ8862-32 MQL 128-Pin PQFP (Top View) ...................................................................................... 17
Figure 4. Typical Straight Cable Connection ............................................................................................................................. 26
Figure 5. Typical Crossover Cable Connection ......................................................................................................................... 26
Figure 6. Auto Negotiation and Parallel Operation.................................................................................................................... 27
Figure 7. Destination Address Lookup Flow Chart in Stage One ........................................................................................... 30
Figure 8. Destination Address Resolution Flow Chart in Stage Two...................................................................................... 31
Figure 9. Mapping from ISA-like, EISA-like, and VLBus-like transactions to the KSZ8862M Bus..................................... 36
Figure 10. KSZ8862M 8-Bit, 16-Bit, and 32-Bit Data Bus Connections ................................................................................. 37
Figure 11. 802.1p Priority Field Format ...................................................................................................................................... 44
Figure 12. Port 2 Far-End Loopback Path .................................................................................................................................. 47
Figure 13. Port 1 and port 2 Near-End (Remote) Loopback Path .......................................................................................... 47
Figure 14. Asynchronous Cycle – ADSN = 0 ........................................................................................................................... 111
Figure 15. Asynchronous Cycle – Using ADSN ...................................................................................................................... 112
Figure 16. Asynchronous Cycle – Using DATACSN .............................................................................................................. 113
Figure 17. Address Latching Cycle for All Modes ................................................................................................................... 114
Figure 18. Synchronous Burst Write Cycles – VLBUSN = 1 ................................................................................................. 115
Figure 19. Synchronous Burst Read Cycles – VLBUSN = 1 ................................................................................................. 116
Figure 20. Synchronous Write Cycle – VLBUSN = 0 .............................................................................................................. 117
Figure 21. Synchronous Read Cycle – VLBUSN = 0 ............................................................................................................. 118
Figure 22. EEPROM Read Cycle Timing Diagram ................................................................................................................. 119
Figure 23. Auto-Negotiation Timing ........................................................................................................................................... 120
Figure 24. Reset Timing .............................................................................................................................................................. 121
Figure 25. 128-Pin PQFP Package ........................................................................................................................................... 123
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KSZ8862-16/32MQL
List of Tables
Table 1. MDI/MDI-X Pin Definitions.................................................................................................................................................. 25
Table 2. Bus Interface Unit Signal Grouping .................................................................................................................................... 35
Table 3. Transmit Queue Frame Format .......................................................................................................................................... 38
Table 4. Transmit Control Word Bit Fields........................................................................................................................................ 38
Table 5. Transmit Byte Count Format .............................................................................................................................................. 39
Table 6. Receive Queue Frame Format ........................................................................................................................................... 39
Table 7. FRXQ Packet Receive Status............................................................................................................................................. 40
Table 8. FRXQ RX Byte Count Field ................................................................................................................................................ 40
Table 9. Spanning Tree States......................................................................................................................................................... 41
Table 10. FID+DA Lookup in VLAN Mode........................................................................................................................................ 43
Table 11. FID+SA Lookup in VLAN Mode ........................................................................................................................................ 43
Table 12. EEPROM Format.............................................................................................................................................................. 45
Table 13. ConfigParam Word in EEPROM Format .......................................................................................................................... 46
Table 14. Format of Per Port MIB Counters .................................................................................................................................... 103
Table 15. Port 1 MIB Counters Indirect Memory Offset................................................................................................................... 104
Table 16. “All Ports Dropped Packet” MIB Counters Format ........................................................................................................... 104
Table 17. “All Ports Dropped Packet” MIB Counters Indirect Memory Offsets ................................................................................ 104
Table 18. Static MAC Table Format (8 Entries).............................................................................................................................. 106
Table 19. Dynamic MAC Address Table Format (1024 Entries)..................................................................................................... 107
Table 20. VLAN Table Format (16 Entries) ..................................................................................................................................... 108
Table 21. Maximum Ratings........................................................................................................................................................... 109
Table 22. Operating Ratings........................................................................................................................................................... 109
Table 23. Electrical Characteristics ................................................................................................................................................ 110
Table 24. Asynchronous Cycle (ADSN = 0) Timing Parameters .................................................................................................... 111
Table 25. Asynchronous Cycle using ADSN Timing Parameters ................................................................................................... 112
Table 26. Asynchronous Cycle using DATACSN Timing Parameters ............................................................................................ 113
Table 27. Address Latching Timing Parameters............................................................................................................................. 114
Table 28. Synchronous Burst Write Timing Parameters................................................................................................................. 115
Table 29. Synchronous Burst Read Timing Parameters ................................................................................................................ 116
Table 30. Synchronous Write (VLBUSN = 0) Timing Parameters .................................................................................................. 117
Table 31. Synchronous Read (VLBUSN = 0) Timing Parameters .................................................................................................. 118
Table 32. EEPROM Timing Parameters......................................................................................................................................... 119
Table 33. Auto Negotiation Timing Parameters.............................................................................................................................. 120
Table 34. Reset Timing Parameters............................................................................................................................................... 121
Table 35. Transformer Selection Criteria........................................................................................................................................ 122
Table 36. Qualified Single Port Magnetic ....................................................................................................................................... 122
Table 37. Typical Reference Crystal Characteristics...................................................................................................................... 122
August 2010
10
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Pin Configuration for KSZ8862-16MQL (8/16-Bit)
Figure 2. 128-Pin PQFP
(Top View)
August 2010
11
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Pin Description for KSZ8862-16MQL (8/16-Bit)
Pin
Number
Pin Name
Type
Pin Function
1
TEST_EN
I
Test Enable
For normal operation, 1K ohm pull-down this pin to ground.
2
SCAN_EN
I
Scan Test Scan MUX Enable
For normal operation, 1K ohm pull-down this pin to ground.
3
P1LED2
Opu
Port 1 and Port 2 LED indicators defined as follows:
4
P1LED1
Opu
5
P1LED0
Opu
1
Switch Global Control Register 5:
SGCR5 bit [15,9]
[0,0] Default
[0,1]
P1LED3 /P2LED3
—
—
P1LED2/P2LED2
Link/Act
100Link/Act
P1LED1/P2LED1
Full duplex/Col
10Link/Act
P1LED0/P2LED0
Speed
Full duplex
2
Reg. SGCR5 bit [15,9]
[1,0]
[1,1]
2
P1LED3 /P2LED3
Act
—
P1LED2/P2LED2
Link
—
P1LED1/P2LED1
Full duplex/Col
—
P1LED0/P2LED0
Speed
—
Notes:
1. Link = On; Activity = Blink; Link/Act = On/Blink; Full Dup/Col = On/Blink;
Full Duplex = On (Full duplex); Off (Half duplex)
Speed = On (100BASE-T); Off (10BASE-T)
2. P1LED3 is pin 27. P2LED3 is pin 22.
6
P2LED2
Opu
7
P2LED1
Opu
8
P2LED0
Opu
9
DGND
Gnd
Digital ground
10
VDDIO
P
3.3V digital VDDIO input power supply for IO with well decoupling capacitors.
11
RDYRTNN
Ipd
Ready Return Not:
For VLBus-like mode: Asserted by the host to complete synchronous read cycles. If
the host doesn’t connect to this pin, assert this pin.
For burst mode (32-bit interface only): Host drives this pin low to signal waiting
states.
12
BCLK
Ipd
Bus Interface Clock
Local bus clock for synchronous bus systems. Maximum frequency is 50MHz.
This pin should be tied Low or unconnected if it is in asynchronous mode.
13
NC
Ipu
No connect.
14
NC
Opu
No connect.
15
SRDYN
Opu
Synchronous Ready Not
Ready signal to interface with synchronous bus for both EISA-like and VLBus-like
extended accesses.
For VLBus-like mode, the falling edge of this signal indicates ready. This signal is
synchronous to the bus clock signal BCLK.
For burst mode (32-bit interface only), the KSZ8862M drives this pin low to signal
wait states.
August 2010
12
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Pin
Number
Pin Name
Type
Pin Function
16
INTRN
Opd
Interrupt
Active Low signal to host CPU to indicate an interrupt status bit is set, this pin need
an external 4.7K pull-up resistor.
17
LDEVN
Opd
Local Device Not
Active Low output signal, asserted when AEN is Low and A15-A4 decode to the
KSZ8862M address programmed into the high byte of the base address register.
LDEVN is a combinational decode of the Address and AEN signal.
18
RDN
Ipd
Read Strobe Not
Asynchronous read strobe, active Low.
19
EECS
Opu
EEPROM Chip Select
20
ARDY
Opd
Asynchronous Ready
ARDY may be used when interfacing asynchronous buses to extend bus access
cycles. It is asynchronous to the host CPU or bus clock. This pin needs an external
4.7K pull-up resistor.
21
CYCLEN
Ipd
Cycle Not
For VLBus-like mode cycle signal; this pin follows the addressing cycle to signal the
command cycle.
For burst mode (32-bit interface only), this pin stays High for read cycles and Low for
write cycles.
22
P2LED3
Opd
Port 2 LED indicator
See the description in pins 6, 7, and 8.
23
DGND
Gnd
Digital IO ground
24
VDDCO
P
1.2V digital core voltage output (internal 1.2V LDO power supply output), this 1.2V
output pin provides power to VDDC, VDDA and VDDAP pins.
Note: Internally generated power voltage. Do not connect an external power supply
to this pin. This pin is used for connecting external filter (Ferrite bead and capacitors).
25
VLBUSN
Ipd
VLBus-like Mode
Pull-down or float: Bus interface is configured for synchronous mode.
Pull-up: Bus interface is configured for 8-bit or 16-bit asynchronous mode or EISAlike burst mode.
26
EEEN
Ipd
EEPROM Enable
EEPROM is enabled and connected when this pin is pull-up.
EEPROM is disabled when this pin is pull-down or no connect.
27
P1LED3
Opd
Port 1 LED indicator. See the description in pins 3, 4, and 5.
28
EEDO
Opd
EEPROM Data Out
This pin is connected to DI input of the serial EEPROM.
29
EESK
Opd
EEPROM Serial Clock
A 4μs serial output clock to load configuration data from the serial EEPROM.
30
EEDI
Ipd
EEPROM Data In
This pin is connected to DO output of the serial EEPROM when EEEN is pull-up.
This pin can be pull-down for 8-bit bus mode, pull-up for 16-bus mode or don’t care
for 32-bus mode when EEEN is pull-down (without EEPROM).
31
SWR
Ipd
Synchronous Write/Read
Write/Read signal for synchronous bus accesses. Write cycles when high and Read
cycles when low.
32
AEN
Ipu
Address Enable
Address qualifier for the address decoding, active Low.
August 2010
13
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Pin
Number
Pin Name
Type
Pin Function
33
WRN
Ipd
Write Strobe Not
Asynchronous write strobe, active Low.
34
DGND
Gnd
Digital IO ground
35
ADSN
Ipd
Address Strobe Not
For systems that require address latching, the rising edge of ADSN indicates the
latching moment of A15-A1 and AEN.
36
PWRDN
Ipu
Full-chip power-down. Low = Power down; High or floating = Normal operation.
37
AGND
Gnd
Analog ground
38
VDDA
P
1.2V analog VDD input power supply from VDDCO (pin24) through external Ferrite
bead and capacitor.
39
AGND
Gnd
Analog ground
40
NC
—
No connect
41
100FX/10FL
Ipu
Fiber mode select for port 1. 1K ohm pull-up to 3.3V for 100Base-FX, 100 ohm pulldown to GND for 100Base-SX or 10Base-FL.
42
AGND
Gnd
Analog ground
43
VDDA
P
1.2V analog VDD input power supply from VDDCO (pin24) through external Ferrite
bead and capacitor.
44
FXSD1
I
Fiber signal detect input for port 1 in 100Base-FX fiber mode. 1K ohm pull-up to 3.3V
for port 1 in 100Base-SX or 10Base-FL fiber modes.
45
RXP1
I/O
Port 1 physical receive (MDI) signal (+ differential) from external fiber module
46
RXM1
I/O
Port 1 physical receive (MDI) signal (– differential) from external fiber module
47
AGND
Gnd
Analog ground
48
TXP1
I/O
Port 1 physical transmit (MDI) signal (+ differential) to external fiber module
49
TXM1
I/O
Port 1 physical transmit (MDI) signal (– differential) to external fiber module
50
VDDATX
P
3.3V analog VDD input power supply with well decoupling capacitors.
51
VDDARX
P
3.3V analog VDD input power supply with well decoupling capacitors.
52
RXM2
I/O
Port 2 physical receive (MDI) or transmit (MDIX) signal (- differential)
53
RXP2
I/O
Port 2 physical receive (MDI) or transmit (MDIX) signal (+ differential)
54
AGND
Gnd
Analog ground
55
TXM2
I/O
Port 2 physical transmit (MDI) or receive (MDIX) signal (- differential)
56
TXP2
I/O
Port 2 physical transmit (MDI) or receive (MDIX) signal (+ differential)
57
VDDA
P
1.2 analog VDD input power supply from VDDCO (pin24) through external Ferrite
bead and capacitor.
58
AGND
Gnd
Analog ground
59
NC
Ipu
No connect
60
NC
Ipu
No connect
61
ISET
O
Set physical transmits output current.
Pull-down this pin with a 3.01K 1% resistor to ground.
62
AGND
Gnd
Analog ground
63
VDDAP
P
1.2V analog VDD for PLL input power supply from VDDCO (pin24) through external
Ferrite bead and capacitor.
64
AGND
Gnd
Analog ground
August 2010
14
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Pin
Number
Pin Name
Type
Pin Function
65
X1
I
66
X2
O
25MHz crystal or oscillator clock connection.
Pins (X1, X2) connect to a crystal. If an oscillator is used, X1 connects to a 3.3V
tolerant oscillator and X2 is a no connect.
Note: Clock requirement is 50ppm for either crystal or oscillator.
67
RSTN
Ipu
Hardware reset pin (active Low). This reset input is required minimum of 10ms low
after stable supply voltage 3.3V.
68
A15
I
Address 15
69
A14
I
Address 14
70
A13
I
Address 13
71
A12
I
Address 12
72
A11
I
Address 11
73
A10
I
Address 10
74
A9
I
Address 9
75
A8
I
Address 8
76
A7
I
Address 7
77
A6
I
Address 6
78
DGND
Gnd
Digital IO ground
79
VDDIO
P
3.3V digital VDDIO input power supply for IO with well decoupling capacitors.
80
A5
I
Address 5
81
A4
I
Address 4
82
A3
I
Address 3
83
A2
I
Address 2
84
A1
I
Address 1
85
NC
I
No Connect
86
NC
I
No Connect
87
BE1N
I
Byte Enable 1 Not, Active low for Data byte 1 enable (don’t care in 8-bit bus mode).
88
BE0N
I
Byte Enable 0 Not, Active low for Data byte 0 enable (there is an internal inverter
enabled and connected to the BE1N for 8-bit bus mode).
89
NC
I
No Connect
90
DGND
Gnd
Digital core ground
91
VDDC
P
1.2V digital core VDD input power supply from VDDCO (pin24) through external
Ferrite bead and capacitor.
92
VDDIO
P
3.3V digital VDDIO input power supply for IO with well decoupling capacitors.
93
NC
I
No Connect
94
NC
I
No Connect
95
NC
I
No Connect
96
NC
I
No Connect
97
NC
I
No Connect
98
NC
I
No Connect
99
NC
I
No Connect
100
NC
I
No Connect
101
NC
I
No Connect
102
NC
I
No Connect
103
NC
I
No Connect
August 2010
15
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Pin
Number
Pin Name
Type
Pin Function
104
NC
I
No Connect
105
NC
I
No Connect
106
NC
I
No Connect
107
DGND
Gnd
Digital IO ground
108
VDDIO
P
3.3V digital VDDIO input power supply for IO with well decoupling capacitors.
109
NC
I
No Connect
110
D15
I/O
Data 15
111
D14
I/O
Data 14
112
D13
I/O
Data 13
113
D12
I/O
Data 12
114
D11
I/O
Data 11
115
D10
I/O
Data 10
116
D9
I/O
Data 9
117
D8
I/O
Data 8
118
D7
I/O
Data 7
119
D6
I/O
Data 6
120
D5
I/O
Data 5
121
D4
I/O
Data 4
122
D3
I/O
Data 3
123
DGND
Gnd
Digital IO ground
124
DGND
Gnd
Digital core ground
125
VDDIO
P
3.3V digital VDDIO input power supply for IO with well decoupling capacitors.
126
D2
I/O
Data 2
127
D1
I/O
Data 1
128
D0
I/O
Data 0
Legend:
P = Power supply
Gnd = Ground
I/O = Bi-directional
I = Input O = Output
Ipd = Input with internal pull-down
Ipu = Input with internal pull-up
Opd = Output with internal pull-down
Opu = Output with internal pull-up
August 2010
16
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Pin Configuration for KSZ8862-32MQL (32-Bit)
Figure 3. 128-Pin PQFP
(Top View)
August 2010
17
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Pin Description for KSZ8862-32 MQL (32-Bit)
Pin
Number
Pin Name
Type
Pin Function
1
TEST_EN
I
Test Enable
For normal operation, 1K ohm pull-down this pin-to-ground.
2
SCAN_EN
I
Scan Test Scan Mux Enable
For normal operation, 1K ohm pull-down this pin-to-ground.
3
P1LED2
Opu
Port 1 and Port 2 LED indicators defined as follows:
4
P1LED1
Opu
5
P1LED0
Opu
1
Switch Global Control Register 5:
SGCR5 bit [15,9]
[0,0] Default
[0,1]
P1LED3 /P2LED3
—
—
P1LED2/P2LED2
Link/Act
100Link/Act
P1LED1/P2LED1
Full duplex/Col
10Link/Act
P1LED0/P2LED0
Speed
Full duplex
2
Reg. SGCR5 bit [15,9]
[1,0]
[1,1]
2
P1LED3 /P2LED3
Act
—
P1LED2/P2LED2
Link
—
P1LED1/P2LED1
Full duplex/Col
—
P1LED0/P2LED0
Speed
—
Notes:
1. Link = On; Activity = Blink; Link/Act = On/Blink; Full Dup/Col = On/Blink;
Full Duplex = On (Full duplex); Off (Half duplex)
Speed = On (100BASE-T); Off (10BASE-T)
2. P1LED3 is pin 27. P2LED3 is pin 22.
6
P2LED2
Opu
7
P2LED1
Opu
8
P2LED0
Opu
9
DGND
Gnd
Digital ground
10
VDDIO
P
3.3V digital VDDIO input power supply for IO with well decoupling capacitors.
11
RDYRTNN
Ipd
Ready Return Not
For VLBus-like mode: Asserted by the host to complete synchronous read cycles. If the
host doesn’t connect to this pin, assert this pin.
For burst mode (32-bit interface only): Host drives this pin low to signal waiting states.
12
BCLK
Ipd
Bus Interface Clock
Local bus clock for synchronous bus systems. Maximum frequency is 50MHz.
This pin should be tied Low or unconnected if it is in asynchronous mode.
13
DATACSN
Ipu
DATA Chip Select Not (For KSZ8862-32 Mode only)
Chip select signal for QMU data register (QDRH, QDRL), active Low.
When DATACSN is Low, the data path can be accessed regardless of the value of AEN,
A15-A1, and the content of the BANK select register.
14
NC
Opu
No connect.
15
SRDYN
Opu
Synchronous Ready Not
Ready signal to interface with synchronous bus for both EISA-like and VLBus-like extend
accesses.
For VLBus-like mode, the falling edge of this signal indicates ready. This signal is
synchronous to the bus clock signal BCLK.
For burst mode (32-bit interface only), the KSZ8862M drives this pin low to signal wait states.
August 2010
18
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Pin
Number
Pin Name
Type
Pin Function
16
INTRN
Opd
Interrupt
Active Low signal to host CPU to indicate an interrupt status bit is set, this pin need an
external 4.7K pull-up resistor.
17
LDEVN
Opd
Local Device Not
Active Low output signal, asserted when AEN is Low and A15-A4 decode to the
KSZ8862M address programmed into the high byte of the base address register. LDEVN
is a combinational decode of the Address and AEN signal.
18
RDN
Ipd
Read Strobe Not
Asynchronous read strobe, active Low.
19
EECS
Opu
EEPROM Chip Select
20
ARDY
Opd
Asynchronous Ready
ARDY may be used when interfacing asynchronous buses to extend bus access cycles.
It is asynchronous to the host CPU or bus clock. This pin needs an external 4.7K pull-up
resistor.
21
CYCLEN
Ipd
Cycle Not
For VLBus-like mode cycle signal; this pin follows the addressing cycle to signal the
command cycle.
For burst mode (32-bit interface only), this pin stays High for read cycles and Low for
write cycles.
22
P2LED3
Opd
Port 2 LED indicator. See the description in pins 6, 7, and 8.
23
DGND
Gnd
Digital IO ground
24
VDDCO
P
1.2V digital core voltage output (internal 1.2V LDO power supply output), this 1.2V output
pin provides power to VDDC, VDDA and VDDAP pins.
Note: Internally generated power voltage. Do not connect an external power supply to this
pin. This pin is used for connecting external filter (Ferrite Bead and capacitors).
25
VLBUSN
Ipd
VLBus-like Mode
Pull-down or float: Bus interface is configured for synchronous mode.
Pull-up: Bus interface is configured for 32-bit asynchronous mode or EISA-like burst
mode.
26
EEEN
Ipd
EEPROM Enable
EEPROM is enabled and connected when this pin is pull-up.
EEPROM is disabled when this pin is pull-down or no connect.
27
P1LED3
Opd
Port 1 LED indicator
See the description in pins 3, 4, and 5.
28
EEDO
Opd
EEPROM Data Out
This pin is connected to DI input of the serial EEPROM.
29
EESK
Opd
EEPROM Serial Clock
A 4μs serial output clock to load configuration data from the serial EEPROM.
30
EEDI
Ipd
EEPROM Data In
This pin is connected to DO output of the serial EEPROM when EEEN is pull-up.
This pin can be pulled-down for 8-bit bus mode, pulled-up for 16-bus mode or either way
for 32-bus mode when EEEN is pulled-down (without EEPROM).
31
SWR
Ipd
Synchronous Write/Read
Write/Read signal for synchronous bus accesses. Write cycles when high and Read
cycles when low.
32
AEN
Ipu
Address Enable
Address qualifier for the address decoding, active Low.
33
WRN
Ipd
Write Strobe Not Asynchronous write strobe, active Low.
August 2010
19
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Pin
Number
Pin Name
Type
Pin Function
34
DGND
Gnd
Digital IO ground
35
ADSN
Ipd
Address Strobe Not
For systems that require address latching, the rising edge of ADSN indicates the latching
moment of A15-A1 and AEN.
36
PWRDN
Ipu
Full-chip power-down. Low = Power down; High or floating = Normal operation.
37
AGND
Gnd
Analog ground
38
VDDA
P
1.2V analog VDD input power supply from VDDCO (pin24) through external Ferrite bead
and capacitor.
39
AGND
Gnd
Analog ground
40
NC
—
No connect
41
100FX/10F
L
Ipu
Fiber mode select for port 1. 1K ohm pull-up to 3.3V for 100Base-FX, 100 ohm pull-down
to GND for 100Base-SX or 10Base-FL.
42
AGND
Gnd
Analog ground
43
VDDA
P
1.2V analog VDD input power supply from VDDCO (pin24) through external Ferrite bead
and capacitor.
44
FXSD1
I
Fiber signal detect input for port 1 in 100Base-FX fiber mode. 1K ohm pull-up to 3.3V for
port 1 in 100Base-SX or 10Base-FL fiber modes.
45
RXP1
I/O
Port 1 physical receive (MDI) signal (+ differential) from external fiber module
46
RXM1
I/O
Port 1 physical receive (MDI) signal (– differential) from external fiber module
47
AGND
Gnd
Analog ground
48
TXP1
I/O
Port 1 physical transmit (MDI) signal (+ differential) to external fiber module
49
TXM1
I/O
Port 1 physical transmit (MDI) signal (– differential) to external fiber module
50
VDDATX
P
3.3V analog VDD input power supply with well decoupling capacitors.
51
VDDARX
P
3.3V analog VDD
52
RXM2
I/O
Port 2 physical receive (MDI) or transmit (MDIX) signal (- differential)
53
RXP2
I/O
Port 2 physical receive (MDI) or transmit (MDIX) signal (+ differential)
54
AGND
Gnd
Analog ground
55
TXM2
I/O
Port 2 physical transmit (MDI) or receive (MDIX) signal (- differential)
56
TXP2
I/O
Port 2 physical transmit (MDI) or receive (MDIX) signal (+ differential)
57
VDDA
P
1.2 analog VDD input power supply from VDDCO (pin24) through external Ferrite bead
and capacitor.
58
AGND
Gnd
Analog ground
59
NC
Ipu
No connect
60
NC
Ipu
No connect
61
ISET
O
Set physical transmits output current.
Pull-down this pin with a 3.01K 1% resistor to ground.
62
AGND
Gnd
Analog ground
63
VDDAP
P
1.2V analog VDD for PLL input power supply from VDDCO (pin24) through external
Ferrite bead and capacitor.
64
AGND
Gnd
Analog ground
65
X1
I
66
X2
O
25MHz crystal or oscillator clock connection.
Pins (X1, X2) connect to a crystal. If an oscillator is used, X1 connects to a 3.3V tolerant
oscillator and X2 is a no connect.
Note: Clock is 50ppm for either crystal or oscillator.
67
RSTN
Ipu
August 2010
Hardware reset pin (active Low). This reset input is required minimum of 10ms low after
stable supply voltage 3.3V.
20
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Pin
Number
Pin Name
Type
Pin Function
68
A15
I
Address 15
69
A14
I
Address 14
70
A13
I
Address 13
71
A12
I
Address 12
72
A11
I
Address 11
73
A10
I
Address 10
74
A9
I
Address 9
75
A8
I
Address 8
76
A7
I
Address 7
77
A6
I
Address 6
78
DGND
Gnd
Digital IO ground
79
VDDIO
P
3.3V digital VDDIO input power supply for IO with well decoupling capacitors.
80
A5
I
Address 5
81
A4
I
Address 4
82
A3
I
Address 3
83
A2
I
Address 2
84
A1
I
Address 1
85
BE3N
I
Byte Enable 3 Not, Active low for Data byte 3 enable.
86
BE2N
I
Byte Enable 2 Not, Active low for Data byte 2 enable.
87
BE1N
I
Byte Enable 1 Not, Active low for Data byte 1 enable.
88
BE0N
I
Byte Enable 0 Not, Active low for Data byte 0 enable.
89
D31
I/O
Data 31
90
DGND
Gnd
Digital core ground
91
VDDC
P
1.2V digital core VDD input power supply from VDDCO (pin24) through external Ferrite
bead and capacitor.
92
VDDIO
P
3.3V digital VDDIO input power supply for IO with well decoupling capacitors.
93
D30
I/O
Data 30
94
D29
I/O
Data 29
95
D28
I/O
Data 28
96
D27
I/O
Data 27
97
D26
I/O
Data 26
98
D25
I/O
Data 25
99
D24
I/O
Data 24
100
D23
I/O
Data 23
101
D22
I/O
Data 22
102
D21
I/O
Data 21
103
D20
I/O
Data 20
104
D19
I/O
Data 19
105
D18
I/O
Data 18
106
D17
I/O
Data 17
107
DGND
Gnd
Digital IO ground
108
VDDIO
P
3.3V digital VDDIO input power supply for IO with well decoupling capacitors.
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Pin
Number
Pin Name
Type
Pin Function
109
D16
I/O
Data 16
110
D15
I/O
Data 15
111
D14
I/O
Data 14
112
D13
I/O
Data 13
113
D12
I/O
Data 12
114
D11
I/O
Data 11
115
D10
I/O
Data 10
116
D9
I/O
Data 9
117
D8
I/O
Data 8
118
D7
I/O
Data 7
119
D6
I/O
Data 6
120
D5
I/O
Data 5
121
D4
I/O
Data 4
122
D3
I/O
Data 3
123
DGND
Gnd
Digital IO ground
124
DGND
Gnd
Digital core ground
125
VDDIO
P
3.3V digital VDDIO input power supply for IO with well decoupling capacitors.
126
D2
I/O
Data 2
127
D1
I/O
Data 1
128
D0
I/O
Data 0
Legend:
P = Power supply
Gnd = Ground
I/O = Bi-directional
I = Input O = Output
Ipd = Input with internal pull-down
Ipu = Input with internal pull-up
Opd = Output with internal pull-down
Opu = Output with internal pull-up
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Functional Description
The KSZ8862M contains two 10/100 physical layer transceivers (PHYs), two MAC units, and a DMA channel integrated
with a Layer-2 switch.
The KSZ8862M contains a bus interface unit (BIU), which controls the KSZ8862M via an 8, 16, or 32-bit host interface.
Physical signal transmission and reception are enhanced through the use of analog circuits in the PHY that make the
design more efficient and allow for low power consumption.
Functional Overview: Physical Layer Transceiver
100BASE-TX Transmit
The 100BASE-TX transmit function (port 2 only) performs parallel-to-serial conversion, 4B/5B coding, scrambling, NRZ-toNRZI conversion, and MLT3 encoding and transmission.
The circuitry starts with a parallel-to-serial conversion, which converts the MII data from the MAC into a 125MHz serial bit
stream. The data and control stream is then converted into 4B/5B coding, followed by a scrambler. The serialized data is
further converted from NRZ-to-NRZI format, and then transmitted in MLT3 current output. The output current is set by an
external1% 3.01KΩ resistor for the 1:1 transformer ratio.
The output signal has a typical rise/fall time of 4ns and complies with the ANSI TP-PMD standard regarding amplitude
balance, overshoot, and timing jitter. The wave-shaped 10BASE-T output is also incorporated into the 100BASE-TX
transmitter.
100BASE-TX Receive
The 100BASE-TX receiver function (port 2 only) performs adaptive equalization, DC restoration, MLT3-to-NRZI
conversion, data and clock recovery, NRZI-to-NRZ conversion, de-scrambling, 4B/5B decoding, and serial-to- parallel
conversion.
The receiving side begins with the equalization filter to compensate for inter-symbol interference (ISI) over the twisted pair
cable. Since the amplitude loss and phase distortion is a function of the cable length, the equalizer must adjust its
characteristics to optimize performance. In this design, the variable equalizer makes an initial estimation based upon
comparisons of incoming signal strength against some known cable characteristics, and then tunes itself for optimization.
This is an ongoing process and self-adjusts against environmental changes such as temperature variations.
Next, the equalized signal goes through a DC restoration and data conversion block. The DC restoration circuit is used to
compensate for the effect of baseline wander and to improve the dynamic range. The differential data conversion circuit
converts the MLT3 format back to NRZI. The slicing threshold is also adaptive.
The clock recovery circuit extracts the 125MHz clock from the edges of the NRZI signal. This recovered clock is then used
to convert the NRZI signal into the NRZ format. This signal is sent through the de-scrambler followed by the 4B/5B
decoder. Finally, the NRZ serial data is converted to the MII format and provided as the input data to the MAC.
Scrambler/De-scrambler (100BASE-TX only)
The purpose of the scrambler is to spread the power spectrum of the signal to reduce electromagnetic interference (EMI)
and baseline wander. Transmitted data is scrambled through the use of an 11-bit wide linear feedback shift register
(LFSR). The scrambler generates a 2047-bit non-repetitive sequence, and the receiver then de-scrambles the incoming
data stream using the same sequence as at the transmitter.
100BASE-FX Operation
100BASE-FX operation is supported on port 1 and similar to 100BASE-TX operation with the differences being that the
scrambler/descrambler and MLT3 encoder/decoder are bypassed on transmission and reception. In addition, autonegotiation is bypassed and auto MDI/MDI-X is disabled.
100BASE-FX Signal Detection
In 100BASE-FX operation, FXSD1 (fiber signal detect), input pin 44, is usually connected to the fiber transceiver
SD (signal detect) output pin. 100BASE-FX mode is activated when the FXSD1 input pin is greater than 1V. When FXSD1
is between 1V and 1.8V, no fiber signal is detected and a far-end fault (FEF) is generated. When FXSD1 is over 2.2V, the
fiber signal is detected. Alternatively, the designer may choose not to implement the FEF feature. In this case, the FXSD1
input pin is tied high to force 100BASE-FX mode.
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The 100BASE-FX signal detection is summarized as below:
When FXSD1 input voltage is less than 0.2V, this is not a fiber mode or there is no fiber connection.
When FXSD1 input voltage is greater than 1.0V but less than 1.8V, this is a FX mode but no signal detected and far-end
fault generated.
When FXSD1 input voltage is greater than 2.2V, this is a FX mode with signal detected.
To ensure proper operation, a resistive voltage divider is recommended to adjust the fiber transceiver SD output voltage
swing to match the FXSD1 pin’s input voltage threshold.
100BASE-FX Far-End-Fault (FEF)
A far-end-fault (FEF) occurs when the signal detection is logically false on the receive side of the fiber transceiver. The
KSZ8862M detects a FEF when its FXSD1 input on port 1 is between 1V and 1.8V. When a FEF is detected, the
KSZ8862M signals its fiber link partner that a FEF has occurred by sending 84 1’s followed by a zero in the idle period
between frames.
By default, FEF is enabled. FEF can be disabled through register setting at P1MBCR (bit2) or P1CR4 (bit12).
100BASE-SX Operation
100BASE-SX operation is supported on port 1 only. It conforms to the TIA/EIA-785 Standard for 100BASE-SX fiber
operation. Fiber Link Negotiation Pulse (FLNP) Bursts are used to advertise link capabilities to the link partner during fiber
auto-negotiation. FLNP Bursts are equivalent to the Fast Link Pulse (FLP) Bursts used in 10BASE-T and 100BASE-TX
auto-negotiation defined by clause 28 of the IEEE802.3 Standard. Refer to respective Standard for details.
Physical Interface
For 100BASE-SX operation, port 1 interfaces with an external fiber module to drive 850nm fiber optic links up to a
maximum distance of 300m. The interface connections between the KSZ8862M and fiber module are single-ended
(common mode). 100BASE-SX signal transmission and reception are done on TXM1 (pin 49) and RXM1 (pin 46),
respectively. Refer to Micrel reference schematic for recommended interface circuit and termination.
Enabling 100BASE-SX Mode
To enable 100BASE-SX mode, tie FXSD1 (pin 44) to high (+3.3V) and 100FX/10FL (pin 41)-to-ground.
Enabling Fiber Forced Mode
In 100BASE-SX mode, the KSZ8862M supports forced mode only.
For forced mode, port 1 has auto-negotiation disabled, is forced to 100Mbps for the speed, and is set to either half or full
duplex. Optionally, flow control can be enabled to send out PAUSE frames in full duplex mode.
Forced mode and auto-negotiation disabled mode settings for 100BASE-SX fiber use the same registers (P1MBCR,
P1CR4). These registers are summarized in the Register Map section.
10BASE-FL Operation
10BASE-FL operation is supported on port 1 only. It conforms to clause 15 and 18 of the IEEE802.3 Standard for
10BASE-FL fiber operation. Fiber Link Negotiation Pulse (FLNP) Bursts are used to advertise link capabilities to the link
partner during fiber auto-negotiation. FLNP Bursts are equivalent to the Fast Link Pulse (FLP) Bursts used in 10BASE-T
and 100BASE-TX auto-negotiation defined by clause 28 of the IEEE802.3 Standard. Refer to respective Standard for
details.
Physical Interface
For 10BASE-FL operation, port 1 interfaces with an external fiber module to drive 850nm fiber optic links up to a
maximum distance of 2km. The interface connections between the KSZ8862M and fiber module are single-ended
(common mode). 10BASE-FL signal transmission and reception are done on TXM1 (pin 49) and RXM1 (pin 46),
respectively. Refer to Micrel reference schematic for recommended interface circuit and termination.
Enabling 10BASE-FL Mode
To enable 10BASE-FL mode, tie FXSD1 (pin 44) to high (+3.3V) and 100FX/10FL (pin 41)-to-ground.
Enabling Fiber Forced Mode
In 10BASE-FL mode, the KSZ8862M supports forced mode only.
For forced mode, port 1 has auto-negotiation disabled, is forced to 10Mbps for the speed, and is set to either half or full
duplex. Optionally, flow control can be enabled to send out PAUSE frames in full duplex mode.
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Forced mode and auto-negotiation disabled mode settings for 10BASE-FL fiber use the same registers (P1MBCR,
P1CR4). These registers are summarized in the Register Map section.
10BASE-T Transmit
The 10BASE-T driver (port 2 only) is incorporated with the 100BASE-TX driver to allow for transmission using the same
magnetic. They are internally wave-shaped and pre-emphasized into outputs with typically 2.3V amplitude. The harmonic
contents are at least 27dB below the fundamental frequency when driven by an all-ones Manchester-encoded signal.
10BASE-T Receive
On the receive side (port 2 only), input buffers and level detecting squelch circuits are employed. A differential input
receiver circuit and a phase-locked loop (PLL) perform the decoding function. The Manchester-encoded data stream is
separated into clock signal and NRZ data. A squelch circuit rejects signals with levels less than 400mV or with short pulse
widths to prevent noise at the RXP-or-RXM input from falsely triggering the decoder. When the input exceeds the squelch
limit, the PLL locks onto the incoming signal and the KSZ8862M decodes a data frame. The receiver clock is maintained
active during idle periods in between data reception.
LED Driver
The device provides a current mode fiber LED driver (port 1 only). The edge-enhanced current mode does not require any
output wave shaping. The drive current of the LED driver can be programmed through ATCR0 [7:6] register in Bank 44.
Post Amplifier
The chip also includes a post amplifier (port 1 only). The post amplifier is intended for interfacing the output of the preamplifier of the PIN diode module. The minimum sensitivity of the amplifier is 2.5 mV (rms) for 10Base-FL receive on pin
RXM1 or 16mV (rms) for 100Base-SX receive on pin RXM1.
Power Management
The KSZ8862M features per port power-down mode. To save power, the user can power-down the port that is not in use
by setting bit 11 in either P1CR4 or P1MBCR register for port 1 and setting bit 11 in either P2CR4 or P2MBCR register for
port 2. To bring the port back up, reset bit 11 in these registers.
In addition, there is a full switch power-down mode. This mode shuts the entire switch down, when the PWRDN (pin 36) is
pulled down to low.
MDI/MDI-X Auto Crossover
To eliminate the need for crossover cables between similar devices, the KSZ8862M supports HP-Auto MDI/MDI-X and
IEEE 802.3u standard MDI/MDI-X auto crossover on port 2. HP-Auto MDI/MDI-X is the default.
The auto-sense function detects remote transmit and receive pairs and correctly assigns the transmit and receive pairs for
the KSZ8862M device. This feature is extremely useful when end users are unaware of cable types in addition to saving
on an additional uplink configuration connection. The auto-crossover feature can be disabled through the port control
registers.
The IEEE 802.3u standard MDI and MDI-X definitions are:
MDI
MDI-X
RJ45 Pins
Signals
RJ45 Pins
Signals
1
TD+
1
RD+
2
TD-
2
RD-
3
RD+
3
TD+
6
RD-
6
TD-
Table 1. MDI/MDI-X Pin Definitions
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Straight Cable
A straight cable connects an MDI device to an MDI-X device or an MDI-X device to an MDI device. The following diagram
shows a typical straight cable connection between a network interface card (NIC) (MDI) and a switch, or hub (MDI-X).
Figure 4. Typical Straight Cable Connection
Crossover Cable
A crossover cable connects an MDI device to another MDI device, or an MDI-X device to another MDI-X device. The
following diagram shows a typical crossover cable connection between two switches or hubs (two MDI-X devices).
10/ 100 Ether net
Media Dep en dent Interface
1
Receiv e Pair
10/100 Ethernet
Media Dependent Interface
Crossover
Cable
1
Receive Pair
2
2
3
3
4
4
5
5
6
6
7
7
8
8
Tr ansmit Pa ir
Transmit Pair
Modular Connector (RJ-45)
HUB
(Repeater or Switch)
Modula r Connector (RJ-45)
HUB
(Repeat er or Sw itch)
Figure 5. Typical Crossover Cable Connection
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Auto Negotiation
The KSZ8862M conforms to the auto negotiation protocol as described by the 802.3 committee to allow the channel to
operate at 10Base-T or 100Base-TX on port 2 only.
Auto negotiation allows unshielded twisted pair (UTP) link partners to select the best common mode of operation. In auto
negotiation, the link partners advertise capabilities across the link to each other. If auto negotiation is not supported or the
link partner to the KSZ8862M is forced to bypass auto negotiation, the mode is set by observing the signal at the receiver.
This is known as parallel mode because while the transmitter is sending auto negotiation advertisements, the receiver is
listening for advertisements or a fixed signal protocol.
The link setup is shown in the following flow diagram (Figure 6).
Start Auto Negotiation
Force Link Setting
NO
Parallel
Operation
YES
Bypass Auto Negotiation
and Set Link Mode
Attempt Auto
Negotiation
Listen for 100BASE-TX
Idles
Listen for 10BASE-T Link
Pulses
Join
Flow
NO
Link Mode Set ?
YES
Link Mode Set
Figure 6. Auto Negotiation and Parallel Operation
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®
LinkMD Cable Diagnostics
®
The KSZ8862M LinkMD uses Time Domain Reflectometry (TDR) to analyze the port 2 cabling plant for common cabling
problems such as open circuits, short circuits, and impedance mismatches.
®
LinkMD works by sending a pulse of known amplitude and duration down the MDI and MDI-X pairs and then analyzes
the shape of the reflected signal. Timing the pulse duration gives an indication of the distance to the cabling fault with a
maximum distance of 200m and an accuracy of +/–2m. Internal circuitry displays the TDR information in a user-readable
digital format in register P2VCT [8:0].
Note: cable diagnostics are only valid for copper connection (port 2) –fiber-optic operation is not supported.
Access
®
®
LinkMD is initiated by accessing register P2VCT, the LinkMD Control/Status register, in conjunction with register
P2CR4, the 100BASE-TX PHY Controller register.
Usage
®
LinkMD can be run at any time by making sure Auto MDIX has been disabled. To disable Auto-MDIX, write a ‘1’ to
®
P2CR4 [10] for port 2 to enable manual control over the pair used to transmit the LinkMD pulse. The self-clearing cable
diagnostic test enable bit P2VCT [15] for port 2, is set to ‘1’ to start the test on this pair.
When bit P2VCT [15] returns to ‘0’, the test is complete. The test result is returned in bits P2VCT [14:13] and the distance
is returned in bits P2VCT [8:0]. The cable diagnostic test results are as follows:
00 = Valid test, normal condition
01 = Valid test, open circuit in cable
10 = Valid test, short circuit in cable
®
11 = Invalid test, LinkMD failed
If P2VCT [14:13] =11, this indicates an invalid test, and occurs when the KSZ8862M is unable to shut down the link
partner. In this instance, the test is not run, as it is not possible for the KSZ8862M to determine if the detected signal is a
reflection of the signal generated or a signal from another source.
Cable distance can be approximated by the following formula:
P2VCT [8:0] X 0.4m for port 2 cable distance
This constant may be calibrated for different cabling conditions, including cables with a velocity of propagation that varies
significantly from the norm.
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Functional Overview: MAC and Switch
Address Lookup
The internal lookup table stores MAC addresses and their associated information. It contains a 1K entry unicast address
learning table plus switching information.
The KSZ8862M is guaranteed to learn 1K addresses and distinguishes itself from hash-based look-up tables, which
depending upon the operating environment and probabilities, may not guarantee the absolute number of addresses it can
learn.
Learning
The internal lookup engine updates its table with a new entry if the following conditions are met:
1. The received packet's Source Address (SA) does not exist in the lookup table.
2. The received packet is good without receiving errors; the packet size is legal length.
The lookup engine inserts the qualified SA into the table, along with the port number and time stamp. If the table is full,
then the last entry of the table is deleted to make room for the new entry.
Migration
The internal look-up engine also monitors whether a station has moved. If a station has moved, it updates the table
accordingly. Migration happens when the following conditions are met:
1. The received packet's SA is in the table but the associated source port information is different.
2. The received packet is good without receiving errors; the packet size is legal length.
The lookup engine updates the existing record in the table with the new source port information.
Aging
The look-up engine updates the time stamp information of a record whenever the corresponding SA appears. The time
stamp is used in the aging process. If a record is not updated for a period of time, the look-up engine removes the record
from the table. The look-up engine constantly performs the aging process and continuously removes aging records. The
aging period is about 200 seconds. This feature can be enabled or disabled through Global Register SGCR1 [10].
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Forwarding
The KSZ8862M forwards packets using the algorithm that is depicted in the following flowcharts. Figure 7 shows stage
one of the forwarding algorithm where the search engine looks up the VLAN ID, static table, and dynamic table for the
destination address, and comes up with “port to forward 1” (PTF1). PTF1 is then further modified by spanning tree, IGMP
snooping, port mirroring, and port VLAN processes to come up with “port to forward 2” (PTF2), as shown in Figure 8. The
packet is sent to PTF2.
Start
PTF1 = NULL
NO
VLAN ID
valid?
- Search VLAN table
- Ingress VLAN filtering
- Discard NPVID check
YES
Search complete.
Get PTF1 from
Static MAC Table
FOUND
Search Static
Table
This search is based on
DA or DA+FID
NOT
FOUND
Search complete.
Get PTF1 from
Dynamic MAC Table
FOUND
Dynamic Table
Search
This search is based on
DA+FID
NOT
FOUND
Search complete.
Get PTF1 from
VLAN table
PTF1
Figure 7. Destination Address Lookup Flow Chart in Stage One
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PTF1
Spanning Tree
Process
- Check receiving port's receive enable bit
- Check destination port's transmit enable bit
- Check whether packets are special (BPDU)
or specified
- Applied to MAC #1 and MAC #2
IGMP Process
- IGMP will be forwarded to the host port
Port Mirror
Process
- RX Mirror
- TX Mirror
- RX or TX Mirror
- RX and TX Mirror
Port VLAN
Membership
Check
PTF2
Figure 8. Destination Address Resolution Flow Chart in Stage Two
The KSZ8862M will not forward the following packets:
1. Error packets.
These include framing errors, Frame Check Sequence (FCS) errors, alignment errors, and illegal size packet errors.
2. 802.3x pause frames.
The KSZ8862M intercepts these packets and performs the flow control.
3. "Local" packets.
Based on destination address (DA) look-up. If the destination port from the lookup table matches the port from which
the packet originated, the packet is defined as "local."
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Switching Engine
The KSZ8862M features a high-performance switching engine to move data to and from the MAC’s packet buffers. It
operates in store and forward mode, while the efficient switching mechanism reduces overall latency.
The switching engine has a 32KB internal frame buffer. This resource is shared between all the ports. There are a total of
256 buffers available. Each buffer is sized at 128B.
MAC Operation
The KSZ8862M strictly abides by IEEE 802.3 standards to maximize compatibility. Additionally, there is an added MAC
filtering function to filter Unicast packets. The MAC filtering function is useful in applications such as VoIP where
restricting certain packets reduces congestion and thus improves performance.
Inter Packet Gap (IPG)
If a frame is successfully transmitted, the minimum 96-bit time for IPG is measured between two consecutive packets. If
the current packet is experiencing collisions, then the minimum 96-bit time for IPG is measured from carrier sense (CRS)
to the next transmit packet.
Back-Off Algorithm
The KSZ8862M implements the IEEE standard 802.3 binary exponential back-off algorithm in half-duplex mode, and
optional "aggressive mode" back-off. After 16 collisions, the packet is optionally dropped depending upon the switch
configuration in SGCR1 [8].
Late Collision
If a transmit packet experiences collisions after 512 bit times of the transmission, then the packet is dropped.
Legal Packet Size
The KSZ8862M discards packets less than 64 bytes and can be programmed to accept packet size up to 1536 bytes in
SGCR2 [1]. The KSZ8862M can also be programmed for special applications to accept packet size up to 1916 bytes in
SGCR2 [2].
Flow Control
The KSZ8862M supports standard 802.3x flow control frames on both transmit and receive sides.
On the receive side, if the KSZ8862M receives a pause control frame, the KSZ8862M will not transmit the next normal
frame until the timer, specified in the pause control frame, expires. If another pause frame is received before the current
timer expires, the timer will be updated with the new value in the second pause frame. During this period (while it is flow
controlled), only flow control packets from the KSZ8862M are transmitted.
On the transmit side, the KSZ8862M has intelligent and efficient ways to determine when to invoke flow control. The flow
control is based on availability of the system resources, including available buffers, available transmit queues, and
available receive queues.
The KSZ8862M will flow control a port that has just received a packet if the destination port resource is busy. The
KSZ8862M issues a flow control frame (Xoff), containing the maximum pause time as defined in IEEE standard 802.3x.
Once the resource is freed up, the KSZ8862M then sends out the other flow control frame (Xon) with zero pause time to
turn off the flow control (turn on transmission to the port). A hysteresis feature is provided to prevent the flow control
mechanism from being constantly activated and deactivated.
The KSZ8862M flow controls all ports if the receive queue becomes full.
Half-Duplex Backpressure
A half-duplex backpressure option (not in IEEE 802.3 standards) is also provided. The activation and deactivation
conditions are the same in full-duplex mode. If backpressure is required, then the KSZ8862M sends preambles to defer
the other stations' transmission (carrier sense deference).
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To avoid jabber and excessive deference (as defined in the 802.3 standard), after a certain time, the KSZ8862M
discontinues the carrier sense and then raises it again quickly. This short silent time (no carrier sense) prevents other
stations from sending out packets thus keeping other stations in a carrier sense deferred state. If the port has packets to
send during a backpressure situation, then the carrier sense type backpressure is interrupted and those packets are
transmitted instead. If there are no additional packets to send, then the carrier sense type backpressure is reactivated
again until switch resources free up. If a collision occurs, then the binary exponential back-off algorithm is skipped and
carrier sense is generated immediately, thus reducing the chance of further collisions and carrier sense is maintained to
prevent packet reception.
To ensure no packet loss in 10 BASE-T or 100 BASE-TX half-duplex modes, the user must enable the following:
1. Aggressive back off (bit 8 in SGCR1)
2. No excessive collision drop (bit 3 in SGCR2)
Note: These bits are not set in default, since this is not the IEEE standard.
Broadcast Storm Protection
The KSZ8862M has an intelligent option to protect the switch system from receiving too many broadcast packets. As the
broadcast packets are forwarded to all ports except the source port, an excessive number of switch resources (bandwidth
and available space in transmit queues) may be utilized. The KSZ8862M has the option to include “multicast packets” for
storm control. The broadcast storm rate parameters are programmed globally, and can be enabled or disabled on a per
port basis in P1CR1 [7] and P2CR1 [7]. The rate is based on a 67ms interval for 100BT and a 670ms interval for 10BT. At
the beginning of each interval, the counter is cleared to zero and the rate limit mechanism starts to count the number of
bytes during the interval. The rate definition is described in SGCR3 [2:0] [15:8]. The default setting is 0x63 (99 decimal).
This is equal to a rate of 1%, calculated as follows:
148,800 frames/sec X 67 ms/interval X 1% = 99 frames/interval (approx.) = 0x63
Note: 148,800 frames/sec is based on 64-byte block of packets in 100BASE-T with 12 bytes of IPG and 8 bytes of
preamble between two packets.
Clock Generator
The X1 and X2 pins are connected to a 25 MHz crystal. X1 can also serve as the connector to a 3.3V, 25 MHz oscillator
(as described in the pin description).
The bus interface unit (BIU) uses BCLK (Bus Clock) for synchronous accesses. The maximum host port frequency is 50
MHz for VLBus-like and burst mode (32-bit interface only).
Bus Interface Unit (BIU)
The host interface of the BIU is designed to communicate with embedded processors. The host interface of the
KSZ8862M is a generic bus interface. Some glue logic may be required when the interface talks to various buses and
processors.
In terms of transfer type, the BIU can support two transfers: asynchronous transfer and synchronous transfer. To support
these transfers (asynchronous and synchronous), the BIU provides three groups of signals:
1. Synchronous signals
2. Asynchronous signals
3. Common signals used for both synchronous and asynchronous transfers.
Since both synchronous and asynchronous signals are independent of each other, synchronous burst transfer and
asynchronous transfer can be mixed or interleaved but cannot be overlapped (due to the sharing of the common signals).
In terms of physical data bus size, the KSZ8862M supports 8, 16, and 32 bit host/industrial standard data bus sizes.
Given a physical data bus size, the KSZ8862M supports 8, 16, or 32-bit data transfers depending upon the size of the
physical data bus. For example, for a 32-bit system/host data bus, it allows 8, 16, and 32-bit data transfers (KSZ886232MQL); for a 16-bit system/host data bus, it allows 8 and 16-bit data transfers (KSZ8862-16MQL); and for 8-bit
system/host data bus, it only allows 8-bit data transfers (KSZ8862-16MQL).
Note that KSZ8862M does not support internal data byte-swap but it does support internal data word-swap. This means
that the system/host data bus HD [7:0] has to connect to both D [7:0] and D [15:8] for 8-bit data bus interfaces. However,
the system/host data bus HD [15:8] and HD [7:0] just connects to D [15:8] and D [7:0], respectively, for 16-bit data bus
interface; there is no need to connect HD [31:24] and HD [23:16] to D [31:24] and D [23:16].
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Table 2 describes the BIU signal grouping.
Signal
(1)
Type
Function
A[15:1]
I
Address
AEN
I
Address Enable
Address Enable asserted indicates memory address on the bus for DMA access and since
the device is an I/O device, address decoding is only enabled when AEN is low.
BE3N, BE2N,
BE1N, BE0N
I
Byte Enable
Common Signals
BE0N
BE1N
BE2N
BE3N
Description
0
0
0
0
32-bit access (32-bit bus only)
0
0
1
1
Lower 16-bit (D[15:0]) access
1
1
0
0
0
1
1
1
Higher 16-bit (D[31:16]) access (32bit bus only)
Byte 0 (D[7:0]) access
1
0
1
1
Byte 1 (D[15:8]) access
1
1
0
1
1
1
1
0
Byte 2 (D[23:16]) access (32-bit bus
only)
Byte 3 (D[31:24]) access (32-bit bus
only)
Note 1: BE3N, BE2N, BE1N and BE0N are ignored when DATACSN is low because 32 bit
transfers are assumed.
Note 2: BE2N and BE3N are valid only for the KSZ8862-32 mode, and are NC for the
KSZ8862-16 mode.
D[31:16]
I/O
Data
For KSZ8862-32 Mode only
D[15:0]
I/O
Data
For both KSZ8862-32 and KSZ8862-16 Modes
ADSN
I
Address Strobe
The rising edge of ADSN is used to latch A[15:1], AEN, BE3N, BE2N, BE1N and BE0N.
LDEVN
O
Local Device
This signal is a combinatorial decode of AEN and A[15:4], The A[15:4] is used to compare
against the Base Address Register.
DATACSN
I
Data Register Chip Select (For KSZ8862-32 Mode only)
This signal is used for central decoding architecture (mostly for embedded application).
When asserted, the device’s local decoding logic is ignored and the 32-bit access to QMU
Data Register is assumed.
INTRN
O
Interrupt
Synchronous Transfer Signals
VLBUSN
I
VLBUSN = 0, VLBus-like cycle.
VLBUSN = 1, burst cycle (both host/system and KSZ8862 can insert wait state)
CYCLEN
I
For VLBus-like access: used to sample SWR when asserted.
For burst access: used to connect to IOWC# bus signal to indicate burst write.
SWR
I
Write/Read
For VLBus-like access: used to indicate write (High) or read (Low) transfer.
For burst access: used to connect to IORC# bus signal to indicate burst read.
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(1)
Signal
Type
Function
SRDYN
O
Synchronous Ready
For VLBus-like access: exactly the same signal definition of nSRDY in VLBus.
For burst access: insert wait state by the KSZ8862M whenever necessary during the Data
Register access.
RDYRTNN
I
Ready Return
For VLBus-like access: exactly like RDYRTNN signal in VLBus to end the cycle.
For burst access: exactly like EXRDY signal in EISA to insert wait states. Note that the
wait states are inserted by system logic (memory) not by KSZ8862M.
BCLK
I
Bus Clock
Asynchronous Transfer Signals
RDN
I
Asynchronous Read
WRN
I
Asynchronous Write
ARDY
O
Asynchronous Ready
This signal is asserted (low) to insert wait states.
Table 2. Bus Interface Unit Signal Grouping
Legend:
I = Input.
O = Output.
I/O = Bi-directional.
Regardless of whether the transfer is synchronous or asynchronous, if the address latch is required, use the rising edge of
ADSN to latch the incoming signals A[15:1], AEN, BE3N, BE2N, BE1N, and BE0N.
Note: Whether the transfer is synchronous or asynchronous, if the local device decoder is used, LDEVN will be asserted
to indicate that the KSZ8862M is successfully targeted. Basically, signal LDEVN is a combinatorial decode of AEN and
A[15:4].
Asynchronous Interface
For asynchronous transfers, the asynchronous dedicated signals RDN (for read) or WRN (for write) toggle, but the
synchronous dedicated signals BCLK, CYCLEN, SWR, and RDYRTNN are de-asserted and stay at the same logic level
throughout the entire asynchronous transfer.
There is no data burst support for asynchronous transfer. All asynchronous transfers are single-data transfers. The BIU,
however, provides flexible asynchronous interfacing to communicate with various applications and architectures. Three
major ways of interfacing with the system (host) are.
1. Interfacing with the system/host relying on local device decoding and having stable address throughout the whole
transfer:
The typical example for this application is ISA-like bus interface using latched address signals as shown in the Figure
16. No additional address latch is required, therefore ADSN should be connected Low. The BIU decodes A[15:4] and
qualifies with AEN (Address Enable) to determine if the KSZ8862M switch is the intended target. The host utilizes the
rising edge of RDN to latch read data and the BIU will use rising edge of WRN to latch write data.
2. Interfacing with the system/host relying on local device decoding but not having stable address throughout the entire
transfer: the typical example for this application is EISA-like bus (non-burst) interface as shown in the Figure 17. This
type of interface requires ADSN to latch the address on the rising edge. The BIU decodes latched A[15:4] and
qualifies with AEN to determine if the KSZ8862M switch is the intended target. The data transfer is the same as the
first case.
3. Interfacing with the system/host relying on central decoding (KSZ8862-32 mode only).
The typical example for this application is for an embedded processor having a central decoder on the system board
or within the processor. Connecting the chip select (CS) from system/host to DATACSN bypasses the local device
decoder. When the DATACSN is asserted, it only allows access to the Data Register in 32 bits and BE3N, BE2N,
BE1N, and BE0N are ignored as shown in the Figure 18. No other registers can be accessed by asserting DATACSN.
The data transfer is the same as in the first case, independent of the type of asynchronous interface used. To insert a
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wait state, the BIU will assert ARDY to prolong the cycle.
Synchronous Interface
For synchronous transfers, the synchronous dedicated signals CYCLEN, SWR, and RDYRTNN will toggle but the
asynchronous dedicated signals RDN and WRN are de-asserted and stay at the same logic level throughout the entire
synchronous transfer.
The synchronous interface mainly supports two applications, one for VLBus-like and the other for EISA-like (DMA type C)
burst transfers. The VLBus-like interface supports only single-data transfer. The pin option VLBUSN determines if it is a
VLBus-like or EISA-like burst transfer – if VLBUSN = 0, the interface is for VLBus-like transfer; if VLBUSN = 1, the
interface is for EISA-like burst transfer.
For VLBus-like transfer interface (VLBUSN = 0):
This interface is used in an architecture in which the device’s local decoder is utilized; that is, the BIU decodes latched
A[15:4] and qualifies with AEN (Address Enable) to determine if the switch is the intended target. No burst is
supported in this application. The M/nIO signal connection in VLBus is routed to AEN. The CYCLEN in this application
is used to sample the SWR signal when it is asserted. Usually, CYCLEN is one clock delay of ADSN. There is a
handshaking process to end the cycle of VLBus-like transfers. When the KSZ8862M is ready to finish the cycle, it
asserts SRDYN. The system/host acknowledges SRDYN by asserting RDYRTNN after the system/host has latched
the read data. The KSZ8862M holds the read data until RDYRTNN is asserted. The timing waveform is shown in
Figure 22 and Figure 23.
For EISA-like burst transfer interface (VLBUSN = 1):
The SWR is connected to IORC# in EISA to indicate the burst read and CYCLEN is connected to IOWC# in EISA to
indicate the burst write. Note that in this application, both the system/host/memory and KSZ8862M are capable of
inserting wait states. For system/host/memory to insert a wait state, assert the RDYRTNN signal; for the KSZ8862M
to insert the wait state, assert the SRDYN signal. The timing waveform is shown in Figure 20 and Figure 21.
Summary
Figure 9 shows the mapping from ISA-like, EISA-like and VLBus-like transactions to the switch’s BIU.
Figure 10 shows the connection for different data bus sizes.
Note: For the 8-bit data bus mode, the internal inverter is enabled and connected between BE0N and BE1N, so even
address will enable the BE0N and odd address will enable the BE1N.
KSZ8862M BIU
ISA
Host Logic
Non-burst
Host Logic
Local
decode
Address Latch
Asynchronous
Interface
Central decode
EISA
Burst
VLBus
No Addr Latch
(ADSN = 0)
Host Logic
Host Logic
Central decode
(VLBUSN = 1)
Address Latch
Local
decode
(VLBUSN = 0)
Synchronous
Interface
Note: To use DATACSN & 32-bit only for Central decode
Figure 9. Mapping from ISA-like, EISA-like, and VLBus-like transactions to the KSZ8862M Bus
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KSZ8862-16
KSZ8862-16
HA[1]
HA[1]
A[1]
A[1]
KSZ8862-32
GND
A[1]
HA[15:2]
A[15:2]
HA[15:2]
A[15:2]
HA[15:2]
A[15:2]
HD[7:0]
D[7:0]
HD[7:0]
D[7:0]
HD[7:0]
D[7:0]
D[15:8]
HD[15:8]
D[15:8]
HD[15:8]
D[15:8]
HD[23:16]
D[23:16]
HD[31:24]
D[31:24]
HA[0]
VDD
BE0N
BE1N
8-bit Data Bus
HA[0]
BE0N
nHBE[0]
BE0N
nSBHE
BE1N
nHBE[1]
BE1N
nHBE[2]
BE2N
nHBE[3]
BE3N
16-bit Data Bus
(for example: ISA-like)
32-bit Data Bus
(for example: EISA-like)
Figure 10. KSZ8862M 8-Bit, 16-Bit, and 32-Bit Data Bus Connections
BIU Implementation Principles
Since the KSZ8862M is an I/O device with 16 addressable locations, address decoding is based on the values of A15-A4
and AEN. Whenever DATACSN is asserted, the address decoder is disabled and a 32-bit transfer to Data Register is
assumed (BE3N – BE0N are ignored).
If address latching is required, the address is latched on the rising edge of ADSN and is transparent when ADSN=0.
1. Byte, word, and double-word data buses and accesses (transfers) are supported.
2. Internal byte swapping is not implemented and word swapping is supported internally. Refer to Figure 12 for the
appropriate 8-bit, 16-bit, and 32-bit data bus connection.
3. Since independent sets of synchronous and asynchronous signals are provided, synchronous and asynchronous
cycles can be mixed or interleaved as long as they are not active simultaneously.
4. The asynchronous interface uses RDN and WRN signal strobes for data latching. If necessary, ARDY is deasserted on the leading edge of the strobe.
5. The VLBUS-like synchronous interface uses BCLK, ADSN, and SWR and CYCLEN to control read and write
operations and generate SRDYN to insert the wait state, if necessary, when VLBUSN = 0. For read, the data must
be held until RDYRTNN is asserted.
6. The EISA-like burst transfer is supported using synchronous interface signals and DATACSN when I/O signal
VLBUSN = 1. Both the system/host/memory and KSZ8862M are capable of inserting wait states. To set the
system/host/memory to insert a wait state, assert RDYRTNN signal. To set the KSZ8862M to insert a wait state,
assert SRDYN signal.
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Queue Management Unit (QMU)
The Queue Management Unit (QMU) manages packet traffic between the MAC/PHY interface and the system host. It has
built-in packet memory for receive and transmit functions called TXQ (Transmit Queue) and RXQ (Receive Queue). Each
queue contains 4KB of memory for back-to-back, non-blocking frame transfer performance. It provides a group of control
registers for system control, frame status registers for current packet transmit/receive status, and interrupts to inform the
host of the real time TX/RX status.
Transmit Queue (TXQ) Frame Format
The frame format for the transmit queue is shown in the following Table 3. The first word contains the control information
for the frame to transmit. The second word is used to specify the total number of bytes of the frame. The packet data
follows. The packet data area holds the frame itself. It may or may not include the CRC checksum depending on whether
hardware CRC checksum generation is enabled.
Multiple frames can be pipelined in both the transmit queue and receive queue as long as there is enough queue memory,
thus avoiding overrun. For each transmitted frame, the transmit status information for the frame is located in the TXSR
register.
Packet Memory
Address Offset
Bit 15
nd
2 Byte
Bit 0
st
1 Byte
0
Control Word
2
Byte Count
4 - up
Packet Data
(maximum size is 1916)
Table 3. Transmit Queue Frame Format
Since multiple packets can be pipelined into the TX packet memory for transmit, the transmit status reflects the
status of the packet that is currently being transferred on the MAC interface (which may or may not be the last
queued packet in the TX queue).
The transmit control word is the first 16-bit word in the TX packet memory, followed by a 16-bit byte count. It must
be word aligned. Each control word corresponds to one TX packet. Table 4 gives the transmit control word bit
fields.
Bit
Description
15
TXIC Transmit Interrupt on Completion
When bit is set, the KSZ8862M sets the transmit interrupt after the present frame has been
transmitted.
14-10
Reserved
9-8
TXDPN Transmit Destination Port Number
When bit is set, this field indicates the destination port(s) where the packet is forwarded
from host system. Set bit 8 to indicate that port 1 is the destination port. Set bit 9 to
indicate that port 2 is the destination port.
Setting all ports to 1 causes the switch engine to broadcast the packet to both ports.
Setting all bits to 0 has no effect. The internal switch engine forwards the packets
according to the switching algorithm in its MAC lookup table.
7-6
Reserved
5-0
TXFID Transmit Frame ID
This field specifies the frame ID that is used to identify the frame and its associated status
information in the transmit status register TXSR[5:0].
Table 4. Transmit Control Word Bit Fields
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The transmit Byte Count specifies the total number of bytes to be transmitted from the TXQ. Its format is given in Table 5.
Bit
Description
15-11
Reserved
10-0
TXBC Transmit Byte Count
Transmit Byte Count. Hardware uses the byte count information to conserve the TX buffer
memory for better utilization of the packet memory.
Note: The hardware behavior is unknown if an incorrect byte count information is written to
this field. Writing a 0 value to this field is not permitted.
Table 5. Transmit Byte Count Format
The data area contains six bytes of Destination Address (DA) followed by six bytes of Source Address (SA), followed by a
variable-length number of bytes. On transmit, all bytes are provided by the CPU, including the source address. The
KSZ8862M does not insert its own source address. The 802.3 Frame Length word (Frame Type in Ethernet) is not
interpreted by the KSZ8862M. It is treated transparently as data for transmit operations.
Receive Queue (RXQ) Frame Format
The frame format for the receive queue is shown in Table 6. The first word contains the status information for the frame
received. The second word is the total number of bytes of the RX frame. Following that is the packet data area. The
packet data area holds the frame itself. It may or may not include the CRC checksum depending on whether hardware
CRC stripping is enabled.
Packet Memory
Address Offset
Bit 15
nd
2 Byte
Bit 0
st
1 Byte
0
Status Word
2
Byte Count
4 - up
Packet Data
(maximum size is 1916)
Table 6. Receive Queue Frame Format
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For receive, the packet receive status always reflects the receive status of the packet received in the current RX packet
memory (see Table 7). The RXSR register indicates the status of the current received frame.
Bit
Description
15
RXFV Receive Frame Valid
When bit is set, indicates that the present frame in the receive packet memory is valid and
received from MAC/PHY. The status information currently in this location is also valid.
When bit is reset, indicates that there is either no pending receive frame or current frame is
still in the process of receiving and has not completed yet.
14-10
Reserved
9-8
RXSPN Receive Source Port Number
When bit is set, this field indicates the source port where the packet was received. (Setting
bit 9 = 0 and bit 8 = 1 indicates the packet was received from port 1. Setting bit 9 = 1 and bit
8 = 0 indicates that the packet was received from port 2. Valid port is either port 1 or port 2.
7
RXBF Receive Broadcast Frame
When bit is set, indicates that this frame has a broadcast address.
6
RXMF Receive Multicast Frame
When bit is set, it indicates that this frame has a multicast address (including the broadcast
address).
5
RXUF Receive Unicast Frame
When bit is set, indicates that this frame has a unicast address.
4
Reserved
3
RXFT Receive Frame Type
When bit is set, indicates that the frame is an Ethernet-type frame (frame length is greater
than 1500 bytes). When clear, indicate that the frame is an IEEE 802.3 frame.
This bit is not valid for runt frames.
2
RXTL Receive Frame Too Long
When bit is set, indicates that the frame length exceeds the maximum size of 1518 bytes.
Frames too long are passed to the host only if the pass bad frame bit is set.
Note: Frame too long is only a frame length indication and does not cause any frame
truncation.
1
RXRF Receive Runt Frame
When bit is set, indicates that a frame was damaged by a collision or premature termination
before the collision window has passed. Runt frames are passed to the host only if the pass
bad frame bit is set.
0
RXCE Receive CRC Error
When bit is set, indicates that a CRC error has occurred on the current received frame. CRC
error frame are passed to the host only if the pass bad frame bit is set.
Table 7. FRXQ Packet Receive Status
Table 8 gives the format of the RX byte count field.
Bit
Description
15-11
Reserved
10-0
RXBC Receive Byte Count
Receive Byte Count.
Table 8. FRXQ RX Byte Count Field
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Advanced Switch Functions
Spanning Tree Support
To support spanning tree, the host port is the designated port for the processor.
The other ports can be configured in one of the five spanning tree states via “transmit enable”, “receive enable” and
“learning disable” register settings in registers P1CR2 and P2CR2 for ports 1 and 2, respectively. Table 9 shows the port
setting and software actions taken for each of the five spanning tree states.
Disable State
Port Setting
Software Action
The port should
not forward or
receive any
packets. Learning
is disabled.
“transmit
enable = 0,
receive
enable = 0,
learning
disable =1”
The processor should not send any packets to the port. The switch may still
send specific packets to the processor (packets that match some entries in
the “static MAC table” with “overriding bit” set) and the processor should
discard those packets. Address learning is disabled on the port in this
state.
Blocking State
Port Setting
Software Action
Only packets to
the processor are
forwarded.
“transmit
enable = 0,
receive
enable = 0,
learning
disable =1”
The processor should not send any packets to the port(s) in this state. The
processor should program the “Static MAC table” with the entries that it
needs to receive (for example, BPDU packets). The “overriding” bit should
also be set so that the switch will forward those specific packets to the
processor. Address learning is disabled on the port in this state.
Listening State
Port Setting
Software Action
Only packets to
and from the
processor are
forwarded.
Learning is
disabled.
“transmit
enable = 0,
receive
enable = 0,
learning
disable =1”
The processor should program the “Static MAC table” with the entries that it
needs to receive (for example, BPDU packets). The “overriding” bit should
be set so that the switch will forward those specific packets to the
processor. The processor may send packets to the port(s) in this state.
Address learning is disabled on the port in this state.
Learning State
Port Setting
Software Action
Only packets to
and from the
processor are
forwarded.
Learning is
enabled.
“transmit
enable = 0,
receive
enable = 0,
learning
disable = 0”
The processor should program the “Static MAC table” with the entries that it
needs to receive (for example, BPDU packets). The “overriding” bit should
be set so that the switch will forward those specific packets to the
processor. The processor may send packets to the port(s) in this state.
Address learning is enabled on the port in this state.
Forwarding State
Port Setting
Software Action
Packets are
forwarded and
received normally.
Learning is
enabled.
“transmit
enable = 1,
receive enable
= 1, learning
disable = 0”
The processor programs the “Static MAC table” with the entries that it
needs to receive (for example, BPDU packets). The “overriding” bit is set so
that the switch forwards those specific packets to the processor. The
processor can send packets to the port(s) in this state. Address learning is
enabled on the port in this state.
Table 9. Spanning Tree States
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IGMP Support
For Internet Group Management Protocol (IGMP) support in Layer 2, the KSZ8862M provides two components:
“IGMP” Snooping
The KSZ8862M traps IGMP packets and forwards them only to the processor (host port). The IGMP packets are
identified as IP packets (either Ethernet IP packets, or IEEE 802.3 SNAP IP packets) with IP version = 0x4 and
protocol version number = 0x2.
“Multicast Address Insertion” in the Static MAC Table
Once the multicast address is programmed in the Static MAC Table, the multicast session is trimmed to the
subscribed ports, instead of broadcasting to all ports.
IPv6 MLD Snooping
The KSZ8862M traps IPv6 Multicast Listener Discovery (MLD) packets and forwards them only to the processor
(host port). MLD snooping is controlled by SGCR2 [13] (MLD snooping enable) and SGCR2 [12] (MLD option).
Setting SGCR2 [13] causes the KSZ8862M to trap packets that meet all of the following conditions:
•
IPv6 multicast packets
•
Hop count limit = 1
•
IPv6 next header = 1 or 58 (or = 0 with hop-by-hop next header = 1 or 58)
•
If SGCR2[12] = 1, IPv6 next header = 43, 44, 50, 51, or 60 (or =0 with hop-by-hop next header = 43, 44,
50, 51, or 60)
Port Mirroring Support
KSZ8862M supports “Port Mirroring” comprehensively as:
“Receive only” mirror on a port
All the packets received on the port are mirrored on the sniffer port. For example, port 1 is programmed to be
“receive sniff” and the host port is programmed to be the “sniffer port”. A packet received on port 1 is destined to
port 2 after the internal lookup. The KSZ8862M forwards the packet to both port 2 and the host port. The
KSZ8862M can optionally even forward “bad” received packets to the “sniffer port”.
“Transmit only” mirror on a port
All the packets transmitted on the port are mirrored on the sniffer port. For example, port 1 is programmed to be
“transmit sniff” and the host port is programmed to be the “sniffer port”. A packet received on port 2 is destined to
port 1 after the internal lookup. The KSZ8862M forwards the packet to both port 1 and the host port.
“Receive and transmit” mirror on two ports
All the packets received on port A and transmitted on port B are mirrored on the sniffer port. To turn on the “AND”
feature, set register SGCR2, bit 8 to “1”. For example, port 1 is programmed to be “receive sniff”, port 2 is
programmed to be “transmit sniff”, and the host port is programmed to be the “sniffer port”. A packet received on
port 1 is destined to port 2 after the internal lookup. The KSZ8862M forwards the packet to both port 2 and the
host port.
Multiple ports can be selected as “receive sniff” or “transmit sniff”. In addition, any port can be selected as the “sniffer
port”. All these per port features can be selected through registers P1CR2, P2CR2, and P3CR2 for ports 1, 2, and the
host port, respectively.
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IEEE 802.1Q VLAN Support
The KSZ8862M supports 16 active VLANs out of the 4096 possible VLANs specified in the IEEE 802.1Q specification.
KSZ8862M provides a 16-entry VLAN table, which converts the 12-bits VLAN ID (VID) to the 4-bits Filter ID (FID) for
address lookup. If a non-tagged or null-VID-tagged packet is received, the ingress port default VID is used for lookup. In
VLAN mode, the lookup process starts with VLAN table lookup to determine whether the VID is valid. If the VID is not
valid, the packet is dropped and its address is not learned. If the VID is valid, the FID is retrieved for further lookup. The
FID + Destination Address (FID+DA) are used to determine the destination port. The FID + Source Address (FID+SA) are
used for address learning. (See Tables 10 and 11.)
DA found in
Static MAC
Table?
Use FID flag?
FID match?
DA+FID found in
Dynamic MAC
Table?
Action
No
Don’t care
Don’t care
No
Broadcast to the membership ports
defined in the VLAN Table bits [18:16]
No
Don’t care
Don’t care
Yes
Send to the destination port defined in the
Dynamic MAC Address Table bits [53:52]
Yes
0
Don’t care
Don’t care
Send to the destination port(s) defined in
the Static MAC Address Table bits [50:48]
Yes
1
No
No
Broadcast to the membership ports
defined in the VLAN Table bits [18:16]
Yes
1
No
Yes
Send to the destination port defined in the
Dynamic MAC Address Table bits [53:52]
Yes
1
Yes
Don’t care
Send to the destination port(s) defined in
the Static MAC Address Table bits [50:48]
Table 10. FID+DA Lookup in VLAN Mode
FID+SA found in Dynamic MAC Table?
Action
No
Learn and add FID+SA to the Dynamic MAC Address Table
Yes
Update time stamp
Table 11. FID+SA Lookup in VLAN Mode
QoS Priority Support
The KSZ8862M provides Quality of Service (QoS) for applications such as VoIP and video conferencing. Offering four
priority queues per port, the per-port transmit queue can be split into four priority queues: Queue 3 is the highest priority
queue and Queue 0 is the lowest priority queue. Bit 0 of registers P1CR1, P2CR1, and P3CR1 is used to enable split
transmit queues for ports 1, 2, and the host port, respectively.
Port-Based Priority
With port-based priority, each ingress port is individually classified as a high-priority receiving port. All packets received at
the high-priority receiving port are marked as high priority and are sent to the high-priority transmit queue if the
corresponding transmit queue is split. Bit 4 and 3 of registers P1CR1, P2CR1, and P3CR1 is used to enable port-based
priority for ports 1, 2, and the host port, respectively.
802.1p-Based Priority
For 802.1p-based priority, the KSZ8862M examines the ingress (incoming) packets to determine whether they are tagged.
If tagged, the 3-bit priority field in the VLAN tag is retrieved and compared against the “priority mapping” value, as
specified by the register SGCR6. The “priority mapping” value is programmable.
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7
1
6
6
2
2
2
46-1500
4
Preamble
DA
SA
VPID
TCI
length
Data
FCS
Bits
802.1q VLAN Tag
16
Tagged Packet Type
(8100 for Ethernet)
3
1
802.1p
CFI
Bytes
SFD
Figure 11 illustrates how the 802.1p priority field is embedded in the 802.1Q VLAN tag.
12
VLAN ID
Figure 11. 802.1p Priority Field Format
802.1p-based priority is enabled by bit 5 of registers P1CR1, P2CR1, and P3CR1 for ports 1, 2, and the host port,
respectively.
The KSZ8862M provides the option to insert or remove the priority tagged frame's header at each individual egress port.
This header, consisting of the 2 bytes VLAN protocol ID (VPID) and the 2 bytes tag control information field (TCI), is also
referred to as the 802.1Q VLAN tag.
Tag insertion is enabled by bit 2 of registers P1CR1, P2CR1, and P3CR1 for ports 1, 2, and the host port, respectively.
At the egress port, untagged packets are tagged with the ingress port’s default tag. The default tags are programmed in
register sets P1VIDCR, P2VIDCR, and P3VIDCR for ports 1, 2 and the host port, respectively. The KSZ8862M does not
add tags to already tagged packets.
Tag removal is enabled by bit 1 of registers P1CR1, P2CR1, and P3CR1 for ports 1, 2, and the host port, respectively. At
the egress port, tagged packets will have their 802.1Q VLAN Tags removed. The KSZ8862M will not modify untagged
packets.
The CRC is recalculated for both tag insertion and tag removal.
802.1p priority field re-mapping is a QoS feature that allows the KSZ8862M to set the “User Priority Ceiling” at any
ingress port. If the ingress packet’s priority field has a higher priority value than the default tag’s priority field of the ingress
port, the packet’s priority field is replaced with the default tag’s priority field. The “User Priority Ceiling” is enabled by bit 3
of registers P1CR2, P2CR2, and P3CR2 for ports 1, 2, and the host port, respectively.
DiffServ-Based Priority
DiffServ-based priority uses the ToS registers shown in the Priority Control Registers section. The ToS priority control
registers implement a fully decoded, 128-bit Differentiated Services Code Point (DSCP) register to determine packet
priority from the 6-bit ToS field in the IP header. When the most significant 6 bits of the ToS field are fully decoded, the
resultant of the 64 possibilities is compared with the corresponding bits in the DSCP register to determine priority.
Rate Limiting Support
The KSZ8862M supports hardware rate limiting from 64 Kbps to 88 Mbps, independently on the “receive side” and on the
“transmit side” on a per port basis. For 10-base T, a rate setting above 10 Mbps means the rate is not limited. On the
receive side, the data receive rate for each priority at each port can be limited by setting up Ingress Rate Control
Registers. On the transmit side, the data transmit rate for each priority queue at each port can be limited by setting up
Egress Rate Control Registers. The size of each frame has options to include minimum IFG (Inter Frame Gap) or
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Preamble byte, in addition to the data field (from packet DA to FCS).
For ingress rate limiting, KSZ8862M provides options to selectively choose frames from all types, multicast, broadcast,
and flooded unicast frames. The KSZ8862M counts the data rate from those selected type of frames. Packets are
dropped at the ingress port when the data rate exceeds the specified rate limit.
For egress rate limiting, the Leaky Bucket algorithm is applied to each output priority queue for shaping output traffic. Inter
frame gap is stretched on a per frame base to generate smooth, non-burst egress traffic. The throughput of each output
priority queue is limited by the egress rate specified.
If any egress queue receives more traffic than the specified egress rate throughput, packets may be accumulated in the
output queue and packet memory. After the memory of the queue or the port is used up, packet dropping or flow control
will be triggered. As a result of congestion, the actual egress rate may be dominated by flow control/dropping at the
ingress end, and may be therefore slightly less than the specified egress rate.
To reduce congestion, it is good practice to make sure the egress bandwidth exceeds the ingress bandwidth.
MAC Filtering Function
Use the static table to assign a dedicated MAC address to a specific port. When a unicast MAC address is not recorded in
the static table, it is also not learned in the dynamic MAC table. The KSZ8862M includes an option that can filter or
forward unicast packets for an unknown MAC address. This option is enabled by SGCR7 [7].
The unicast MAC address filtering function is useful in preventing the broadcast of unicast packets that could degrade the
quality of this port in applications such as voice over Internet Protocol (VoIP).
Configuration Interface
The KSZ8862M operates only as a managed switch.
EEPROM Interface
It is optional in the KSZ8862M to use an external EEPROM. In the case that an EEPROM is not used, the EEEN pin must
be tied Low or floating.
The external serial EEPROM with a standard microwire bus interface is used for non-volatile storage of information such
as the host MAC address, base address, and default configuration settings. The KSZ8862M can detect if the EEPROM is
a 1KB (93C46) or 4KB (93C66) EEPROM device (the 93C46 and the 93C66 are typical EEPROM devices). The
EEPROM is organized as 16-bit mode.
If the EEEN pin is pulled high, the KSZ8862M performs an automatic read of the external EEPROM words 0H to 6H after
the de-assertion of Reset. The EEPROM values are placed in certain host-accessible registers. EEPROM read/write
functions can also be performed by software read/writes to the EEPCR registers.
The KSZ8862M EEPROM format is given below.
WORD
15
8
7
0H
Base Address
1H
Host MAC Address Byte 2
Host MAC Address Byte 1
2H
Host MAC Address Byte 4
Host MAC Address Byte 3
3H
Host MAC Address Byte 6
Host MAC Address Byte 5
4H
Reserved
5H
Reserved
6H
ConfigParam (see Table 13)
7H-3FH
Not used for KSZ8862M (available for user to use)
0
Table 12. EEPROM Format
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The format for ConfigParam is shown in Table 13.
Bit
Bit Name
Description
15 -2
Reserved
Reserved
1
Clock_Rate
Internal clock rate selection
0: 125 MHz
1: 25 MHz
Note: At power up, this chip operates on 125 MHz clock. The internal frequency can be
dropped to 25 MHz via the external EEPROM.
0
ASYN_8bit
Async 8-bit or 16-bit bus select
1= bus is configured for 16-bit width
0= bus is configured for 8-bit width
(32-bit width, KSZ8862-32, don’t care this bit setting)
Table 13. ConfigParam Word in EEPROM Format
Loopback Support
The KSZ8862M provides loopback support for remote diagnostic of failure. In loopback mode, the speed at both PHY
ports will be set to 100BASE-TX full-duplex mode. Two types of loopback are supported: Far-end Loopback and Near-end
(Remote) Loopback.
Far-end Loopback
Far-end loopback is conducted between the KSZ8862M’s two PHY ports. The loopback path starts at the “Originating.”
PHY port’s receive inputs (RXP/RXM), wraps around at the “loopback” PHY port’s PMD/PMA, and ends at the
“Originating” PHY port’s transmit outputs (TXP/TXM).
Bit [8] of registers P1CR4 and P2CR4 is used to enable far-end loopback for ports 1 and 2, respectively. Alternatively, Bit
[14] of registers P1MBCR and P2MBCR can also be used to enable far-end loopback. The port 2 far-end loopback path is
illustrated in the Figure 12.
Near-end (Remote) Loopback
Near-end (Remote) loopback is conducted at either PHY port 1 or PHY port 2 of the KSZ8862M. The loopback path starts
at the PHY port receiving inputs (RXPx/RXMx), wraps around at the same PHY port’s PMD/PMA, and ends at the PHY
port’s transmit outputs (TXPx/TXMx).
Bit [1] of registers P1PHYCTRL and P2PHYCTRL is used to enable near-end loopback for ports 1 and 2, respectively.
Alternatively, Bit [9] of registers P1SCSLMD and P2SCSLMD can also be used to enable near-end loopback. The both
ports 1 and 2 near-end loopback paths are illustrated in the following Figure 13.
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R X P 1 /
R X M 1
O r ig in a tin g
P H Y P o r t 1
T X P 1 /
T X M 1
P M D 1 /P M A 1
P C S 1
M A C 1
S w it c h
M A C 2
P C S 2
P M D 2 /P M A 2
P H Y P o r t 2
F a r-e n d L o o p b a ck
Figure 12. Port 2 Far-End Loopback Path
R X P 1 /
R X M 1
P H Y P o rt 1
N e a r -e n d (re m o te )
L o o p b a c k
T X P 1 /
T X M 1
P M D 1 /P M A 1
P C S 1
M A C 1
S w itc h
M A C 2
P C S 2
P M D 2 /P M A 2
T X P 2 /
T X M 2
P H Y P o rt 2
N e a r-e n d (re m o te )
L o o p b a c k
R X P 2 /
R X M 2
Figure 13. Port 1 and port 2 Near-End (Remote) Loopback Path
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CPU Interface I/O Registers
The KSZ8862M provides an EISA-like, ISA-like, or VLBUS-like bus interface for the CPU to access its internal I/O
registers. I/O registers serve as the address that the microprocessor uses when communicating with the device. This is
used for configuring operational settings, reading or writing control, status information, and transferring packets by reading
and writing through the packet data registers.
I/O Registers
Input/Output (I/O) registers are limited to 16 locations as required by most ISA bus-based systems; therefore, registers
are assigned to different banks. The last word of the I/O register locations (0xE - 0xF) is shared by all banks and can be
used to change the bank in use.
The following I/O Space Mapping Tables apply to 8, 16 or 32-bit bus products. Depending on the bus interface used and
byte enable signals (BE[3:0]N control byte access), each I/O access can be performed as an 8-bit, 16-bit, or 32-bit
operation. (The KSZ8862M is not limited to 8/16-bit performance and 32-bit read/write are also supported).
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Internal I/O Space Mapping
I/O Register Location
32-Bit
16-Bit
8-Bit
0x0
0x0
- 0x1
0x1
0x0
To
0x3
Bank 0
Base
Address
[7:0]
Base
Address
[15:8]
Bank Location
Bank 1
Reserved
0x2
0x2
Reserved
- 0x3
Reserved
0x3
0x4
0x4
- 0x5
0x4
0x5
To
0x7
0x6
0x6
- 0x7
0x7
0x8
0x8
- 0x9
0x9
0x8
QMU
RX
Flow Control
Watermark
[7:0]
QMU
RX
Flow Control
Watermark
[15:8]
Bus
Error
Status
[7:0]
Bus
Error
Status
[15:8]
Bus
Burst
Length
[7:0]
Bus
Burst
Length
[15:8]
Reserved
Bank 2
Bank 3
Bank 4
Host
MAC On-Chip Bus
Address Low Control
[7:0]
[7:0]
Host
MAC On-Chip Bus
Address Low Control
[15:8]
[15:8]
Host
MAC EEPROM
Address Mid Control
[7:0]
[7:0]
Host
MAC EEPROM
Address Mid Control
[15:8]
[15:8]
Host
MAC Memory BIST
Address High Info
[7:0]
[7:0]
Bank 5
Bank 6
Bank 7
Reserved
Reserved
Reserved
Host
MAC Memory BIST
Address High Info
[15:8]
[15:8]
Reserved
Reserved
Reserved
Reserved
Global
Reset
[7:0]
Global
Reset
[15:8]
Bus
Configuration
[7:0]
Bus
Configuration
[15:8]
Reserved
Reserved
To
0xB
0xA
0xA
Reserved
- 0xB
0xB
0xC
0xC
Reserved
- 0xD
0xD
0xC
To
0xF
0xE
Bank Select [7:0]
0xF
Bank Select [15:8]
0xE
- 0xF
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Internal I/O Space Mapping (continued)
I/O Register Location
32-Bit
16-Bit
8-Bit
Bank Location
Bank 8
Bank 9
Bank 10
Bank 11
Bank 12
Bank 13
Bank 14
Bank 15
0x0
0x0
Reserved
- 0x1
0x1
0x0
To
0x3
0x2
0x2
Reserved
- 0x3
0x3
0x4
0x4
Reserved
- 0x5
0x5
0x4
To
0x7
0x6
0x6
Reserved
- 0x7
0x7
0x8
0x8
Reserved
- 0x9
0x9
0x8
To
0xB
0xA
0xA
Reserved
- 0xB
0xB
0xC
0xC
Reserved
- 0xD
0xD
0xC
To
0xF
0xE
Bank Select [7:0]
0xF
Bank Select [15:8]
0xE
- 0xF
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Internal I/O Space Mapping (continued)
I/O Register Location
32-Bit
16-Bit
8-Bit
0x0
0x0
- 0x1
0x1
0x0
To
0x3
0x2
0x2
- 0x3
0x3
0x4
0x4
- 0x5
0x5
0x4
To
0x7
Bank Location
Bank 16
Transmit
Control
[7:0]
Transmit
Control
[15:8]
Transmit
Status
[7:0]
Transmit
Status
[15:8]
Receive
Control
[7:0]
Receive
Control
[15:8]
0x6
0x6
Reserved
- 0x7
0x7
0x8
0x8
- 0x9
0x9
0x8
To
0xB
0xA
0xA
- 0xB
0xB
Bank 17
TXQ
Command
[7:0]
TXQ
Command
[15:8]
RXQ
Command
[7:0]
RXQ
Command
[15:8]
TX Frame
Data Pointer
[7:0]
TX Frame
Data Pointer
[15:8]
RX Frame
Data Pointer
[7:0]
RX Frame
Data Pointer
[15:8]
TXQ Memory
Information
[7:0]
TXQ Memory
Information
[15:8]
QMU Data
Low
[7:0]
QMU Data
Low
[15:8]
RXQ Memory QMU Data
Information
High
[7:0]
[7:0]
RXQ Memory
Information
[15:8]
Bank 18
Interrupt
Enable
[7:0]
Interrupt
Enable
[15:8]
Interrupt
Status
[7:0]
Interrupt
Status
[15:8]
Receive
Status
[7:0]
Receive
Status
[15:8]
Receive Byte
Counter
[7:0]
Receive Byte
Counter
[15:8]
Reserved
Bank 19
Bank 20
Bank 21
Multicast
Table 0
[7:0]
Multicast
Table 0
[15:8]
Multicast
Table 1
[7:0]
Multicast
Table 1
[15:8]
Multicast
Table 2
[7:0]
Multicast
Table 2
[15:8]
Multicast
Table 3
[7:0]
Multicast
Table 3
[15:8]
Bank 22
Bank 23
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
QMU Data
High
[15:8]
0xC
0xC
Reserved
- 0xD
0xD
0xC
To
0xF
0xE
Bank Select [7:0]
0xF
Bank Select [15:8]
0xE
- 0xF
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Internal I/O Space Mapping (continued)
I/O Register Location
32-Bit
16-Bit
8-Bit
Bank Location
Bank 24
Bank 25
Bank 26
Bank 27
Bank 28
Bank 29
Bank 30
Bank 31
0x0
0x0
Reserved
- 0x1
0x1
0x0
To
0x3
0x2
0x2
Reserved
- 0x3
0x3
0x4
0x4
Reserved
- 0x5
0x5
0x4
To
0x7
0x6
0x6
Reserved
- 0x7
0x7
0x8
0x8
Reserved
- 0x9
0x9
0x8
To
0xB
0xA
0xA
Reserved
- 0xB
0xB
0xC
0xC
Reserved
- 0xD
0xD
0xC
To
0xF
0xE
Bank Select [7:0]
0xF
Bank Select [15:8]
0xE
- 0xF
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Internal I/O Space Mapping (continued)
I/O Register Location
32-Bit
16-Bit
8-Bit
0x0
0x0
- 0x1
0x1
0x0
To
0x3
0x2
0x2
- 0x3
0x3
0x4
0x4
- 0x5
0x5
0x4
To
0x7
0x6
0x6
- 0x7
0x7
0x8
0x8
- 0x9
0x9
0x8
To
0xB
0xA
0xA
- 0xB
0xB
Bank Location
Bank 32
Bank 33
Switch ID and
Enable
[7:0]
Switch ID and
Enable
[15:8]
Switch Global
Control 1
[7:0]
Switch Global
Control 1
[15:8]
Switch Global
Control 2
[7:0]
Switch Global
Control 2
[15:8]
Switch Global
Control 3
[7:0]
Switch Global
Control 3
[15:8]
Switch Global
Control 4
[7:0]
Switch Global
Control 4
[15:8]
Switch Global
Control 5
[7:0]
Switch Global
Control 6
[7:0]
Switch Global
Control 6
[15:8]
Switch Global
Control 7
[7:0]
Switch Global
Control 7
[15:8]
Bank 34
Bank 35
Bank 36
Reserved
Reserved
Reserved
Bank 37
Bank 38
Bank 39
MAC
Address 1
[7:0]
MAC
Address 1
[15:8]
MAC
Address 2
[7:0]
MAC
Address 2
[15:8]
MAC
Address 3
[7:0]
MAC
Address 3
[15:8]
Reserved
Reserved
Reserved
Switch Global
Control 5
[15:8]
0xC
0xC
Reserved
- 0xD
0xD
0xC
To
0xF
0xE
Bank Select [7:0]
0xF
Bank Select [15:8]
0xE
- 0xF
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Internal I/O Space Mapping (continued)
I/O Register Location
32-Bit
16-Bit
8-Bit
Bank 40
Bank 41
Bank 42
0x0
TOS Priority TOS Priority Indirect
Control 1
Control 7
Access Ctrl.
[7:0]
[7:0]
[7:0]
0x1
TOS Priority TOS Priority Indirect
Control 1
Control 7
Access
[15:8]
[15:8]
[15:8]
0x2
TOS Priority TOS Priority Indirect
Control 2
Control 8
Access Data 1
[7:0]
[7:0]
[7:0]
0x3
TOS Priority TOS Priority Indirect
Control 2
Control 8
Access Data 1
[15:8]
[15:8]
[15:8]
0x0
- 0x1
0x0
Bank Location
Bank 43
Bank 44
Digital Test
Status
[7:0]
Reserved
Ctrl.
Digital Test
Status
[15:8]
To
0x3
0x2
- 0x3
0x4
TOS Priority
Control 3
[7:0]
Analog Test
Status
[7:0]
Reserved
Indirect
Access Data 2
[7:0]
Analog Test
Status
[15:8]
Digital Test
Control
[7:0]
Bank 45
Bank 46
PHY1 MIIRegister
Basic Control
[7:0]
PHY1 MIIRegister
Basic Control
[15:8]
PHY1 MIIRegister
Basic Status
[7:0]
PHY1 MIIRegister
Basic Status
[15:8]
PHY1 PHYID
Low
[7:0]
PHY2 MIIRegister
Basic Control
[7:0]
PHY2 MIIRegister
Basic Control
[15:8]
PHY2 MIIRegister
Basic Status
[7:0]
PHY2 MIIRegister
Basic Status
[15:8]
PHY2 PHYID
Low
[7:0]
0x4
Reserved
- 0x5
0x4
0x5
To
0x7
0x6
0x6
- 0x7
0x7
0x8
0x8
- 0x9
0x9
0x8
To
0xB
0xA
0xA
- 0xB
0xB
Reserved
TOS Priority
Control 3
[15:8]
Indirect
Access Data 2
[15:8]
Digital Test
Control
[15:8]
TOS Priority
Control 4
[7:0]
TOS Priority
Control 4
[15:8]
TOS Priority
Control 5
[7:0]
TOS Priority
Control 5
[15:8]
TOS Priority
Control 6
[7:0]
Indirect
Access Data 3
[7:0]
Analog Test
Control 0
[7:0]
Analog Test
Control 0
[15:8]
Analog Test
Control 1
[7:0]
Analog Test
Control 1
[15:8]
Analog Test
Control 2
[7:0]
PHY1 A.N.
Advertisement
[7:0]
PHY1 A.N.
Advertisement
[15:8]
PHY1 A.N.
Link Partner
Ability [7:0]
PHY2 A.N.
Advertisement
[7:0]
PHY2 A.N.
Advertisement
[15:8]
PHY2 A.N.
Link Partner
Ability [7:0]
Analog Test
Control 2
[15:8]
PHY1 A.N.
Link Partner
Ability [15:8]
PHY2 A.N.
Link Partner
Ability [15:8]
TOS Priority
Control 6
[15:8]
Reserved
Reserved
Indirect
Access Data 3
[15:8]
Indirect
Access Data 4
[7:0]
Reserved
Reserved
Indirect
Access Data 4
[15:8]
Indirect
Access Data 5
[7:0]
Reserved
Indirect
Access Data 5
[15:8]
Reserved
Bank 47
Reserved
PHY1 Special
Control/Status
[7:0]
PHY1 Special
Control/Status
[15:8]
PHY2
LinkMD®
Control/Status
[7:0]
PHY1 PHYID PHY2 PHYID PHY2
Low
Low
LinkMD®
Control/Status
[15:8]
[15:8]
[15:8]
PHY1 PHYID PHY2 PHYID PHY2 Special
High
High
Control/Status
[7:0]
[7:0]
[7:0]
PHY1 PHYID PHY2 PHYID PHY2 Special
High
High
Control/Status
[15:8]
[15:8]
[15:8]
Reserved
Reserved
0xC
0xC
Reserved
- 0xD
0xD
0xC
To
0xF
0xE
Bank Select [7:0]
0xF
Bank Select [15:8]
0xE
- 0xF
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Internal I/O Space Mapping (continued)
I/O Register Location
32-Bit
16-Bit
8-Bit
0x0
Bank Location
Bank 48
Port 1
Control 1
[7:0]
0x0
- 0x1
0x0
0x1
To
0x3
0x2
0x2
- 0x3
0x3
0x4
0x4
- 0x5
0x5
0x4
To
0x7
0x6
0x6
- 0x7
0x7
0x8
0x8
- 0x9
0x9
0x8
To
0xB
0xA
0xA
- 0xB
0xB
Port 1
Control 1
[15:8]
Bank 49
Port 1 PHY
Special
Control/Status,
LinkMD® [7:0]
Port 1 PHY
Special
Control/Status,
LinkMD®
[15:8]
Port 1
Control 4
[7:0]
Port 1
Control 4
[15:8]
Bank 50
Bank 51
Port 2 PHY
Special
Control/Status,
LinkMD® [7:0]
Port 1 PHY
Special
Control/Status,
LinkMD®
[15:8]
Port 2
Control 4
[7:0]
Port 2
Control 4
[15:8]
Port 2
Control 1
[7:0]
Port 2
Control 1
[15:8]
Bank 52
Host Port
Control 1
[15:8]
Port 2
Control 2
[7:0]
Port 2
Control 2
[15:8]
Port 2 VID Port 2
Control
Status
[7:0]
[7:0]
Host Port
Control 2
[7:0]
Host Port
Control 2
[15:8]
Host
Port
VID Control
[7:0]
Port 1 VID Port 1
Control
Status
[15:8]
[15:8]
Port 1
Control 3
[7:0]
Reserved
Port 1
Control 3
[15:8]
Port1 Ingress
Rate Control
[7:0]
Reserved
Port1 Ingress
Rate Control
[15:8]
Port1 Egress
Rate Control
[7:0]
Reserved
Port1 Egress
Rate Control
[15:8]
Port 2
Control
[15:8]
Host
Port
VID Control
[15:8]
Port 2
Control 3
[7:0]
Port 2
Control 3
[15:8]
Port2 Ingress
Rate Control
[7:0]
Port2 Ingress
Rate Control
[15:8]
Port2 Egress
Rate Control
[7:0]
Port2 Egress
Rate Control
[15:8]
Reserved
Reserved
Bank 54
Bank 55
Host Port
Control 1
[7:0]
Port 1
Control 2
[7:0]
Port 1
Control 2
[15:8]
Port 1 VID Port 1
Control
Status
[7:0]
[7:0]
VID Port 2
Status
[15:8]
Bank 53
Host Port
Control 3
[7:0]
Host Port
Control 3
[15:8]
Host
Port
Ingress Rate
Control [7:0]
Host
Port
Ingress Rate
Control [15:8]
Reserved
Reserved
Reserved
Reserved
Reserved
Host
Port
Egress Rate
Control [7:0]
Reserved
Host
Port
Egress Rate
Control [15:8]
Reserved
0xC
0xC
Reserved
- 0xD
0xD
0xC
To
0xF
0xE
Bank Select [7:0]
0xF
Bank Select [15:8]
0xE
- 0xF
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Internal I/O Space Mapping (continued)
I/O Register Location
32-Bit
16-Bit
8-Bit
Bank Location
Bank 56
Bank 57
Bank 58
Bank 59
Bank 60
Bank 61
Bank 62
Bank 63
0x0
0x0
Reserved
- 0x1
0x1
0x0
To
0x3
0x2
0x2
Reserved
- 0x3
0x3
0x4
0x4
Reserved
- 0x5
0x5
0x4
To
0x7
0x6
0x6
Reserved
- 0x7
0x7
0x8
0x8
Reserved
- 0x9
0x9
0x8
To
0xB
0xA
0xA
Reserved
- 0xB
0xB
0xC
0xC
Reserved
- 0xD
0xD
0xC
To
0xF
0xE
Bank Select [7:0]
0xF
Bank Select [15:8]
0xE
- 0xF
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Register Map: Switch and MAC/PHY
Do not write to bit values or to registers defined as Reserved. Manipulating reserved bits or registers causes
unpredictable and often fatal results. If the user wants to write to these reserved bits, the user has to read back these
reserved bits (RO or RW) first, then “OR” with the read value of the reserved bits and write back to these reserved bits.
Bit Type Definition
RO = Read only.
RW = Read/Write.
W1C = Write 1 to Clear (writing a one to this bit clears it).
Bank 0-63 Bank Select Register (0x0E): BSR (same location in all Banks)
The bank select register is used to select or to switch between different sets of register banks for I/O access.
There are a total of 64 banks available to select, including the built-in switch engine registers.
Bit
Default Value
R/W
Description
15-6
0x000
RO
Reserved
5-0
0x00
R/W
BSA Bank Select Address Bits
BSA bits select the I/O register bank in use.
This register is always accessible regardless of the register bank currently selected.
Notes:
The bank select register can be accessed as a doubleword (32-bit) at offset 0xC, as a word
(16-bit) at offset 0xE, or as a byte (8-bit) at offset 0xE.
A doubleword write to offset 0xC writes to the BANK Select Register but does not write to
registers 0xC and 0xD; it only writes to register 0xE.
Bank 0 Base Address Register (0x00): BAR
This register holds the base address for decoding a device access. Its value is loaded from the external EEPROM (0x0H)
upon a power-on reset if the EEPROM Enable (EEEN) pin is tied to High. Its value can also be modified after reset.
Writing to this register does not store the value into the EEPROM. When the EEEN pin is tied to Low, the default base
address is 0x0300.
Bit
Default Value
R/W
Description
15-8
0x03 if EEEN
is Low or, the
value from
EEPROM if
EEEN is High
RW
BARH Base Address High
These bits are compared against the address on the bus ADDR[15:8] to determine the BASE
for the KSZ8862M registers.
7-5
0x0 if EEEN is
Low or, the
value from
EEPROM if
EEEN is High
RW
BARL Base Address Low
These bits are compared against the address on the bus ADDR[7:5] to determine the BASE
for the KSZ8862M registers.
4-0
0x00
RO
Reserved
Bank 0 QMU RX Flow Control High Watermark Configuration Register (0x04): QRFCR
This register contains the user defined QMU RX Queue high watermark configuration bit as below.
Bit
Default Value
R/W
Description
15-13
0x0
RO
Reserved
12
0
RW
QMU RX Flow Control High Watermark Configuration
0: To select 3 Kbytes, 1: To select 2 Kbytes
11-0
0x000
RO
Reserved
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Bank 0 Bus Error Status Register (0x06): BESR
This register flags the different kinds of errors on the host bus.
Bit
Default Value
R/W
Description
15
0
RO
IBEC Illegal Byte Enable Combination
1: illegal byte enable combination occurs. The illegal combination value can be found from bit
14 to bit 11.
0: legal byte enable combination.
Write 1 to clear.
14-11
-
RO
IBECV Illegal Byte Enable Combination Value
Bit 14: byte enable 3.
Bit 13: byte enable 2.
Bit 12: byte enable 1.
Bit 11: byte enable 0.
This value is valid only when bit 15 is set to 1.
10
0
RO
SSAXFER Simultaneous Synchronous and Asnychronous Transfers
1: Synchronous and Asnychronous Transfers occur simultaneously.
0: normal.
Write 1 to clear.
9-0
0x000
RO
Reserved
Bank 0 Bus Burst Length Register (0x08): BBLR
Before the burst can be sent, the burst length needs to be programmed.
Bit
Default Value
R/W
Description
15
0
RO
Reserved
14-12
0x0
RW
BRL Burst Length (for burst read and write)
000: single.
011: fixed burst read length of 4.
101: fixed burst read length of 8.
111: fixed burst read length of 16.
11-0
0x000
RO
Reserved
Bank 1 Reserved
Except Bank Select Register (0xE).
Bank 2 Host MAC Address Register Low (0x00): MARL
This register along with the other two Host MAC address registers are loaded starting at word location 0x1 of the
EEPROM upon hardware reset. The software driver can modify the register, but it will not modify the original Host MAC
address value in the EEPROM. These six bytes of Host MAC address in external EEPROM are loaded to these three
registers as mapping below:
MARL[15:0] = EEPROM 0x1(MAC Byte 2 and 1)
MARM[15:0] = EEPROM 0x2(MAC Byte 4 and 3)
MARH[15:0] = EEPROM 0x3(MAC Byte 6 and 5)
The Host MAC address is used to define the individual destination address that the KSZ8862M responds to when
receiving frames. Network addresses are generally expressed in the form of 01:23:45:67:89:AB, where the bytes are
received from left to right, and the bits within each byte are received from right to left (LSB to MSB). For example, the
actual transmitted and received bits are on the order of 10000000 11000100 10100010 11100110 10010001 11010101.
These three registers value for Host MAC address 01:23:45:67:89:AB will be held as below:
MARL[15:0] = 0x89AB
MARM[15:0] = 0x4567
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MARH[15:0] = 0x0123
The following table shows the register bit fields:
Bit
Default Value
R/W
Description
15-0
-
RW
MARL MAC Address Low
The least significant word of the MAC address.
Bank 2 Host MAC Address Register Middle (0x02): MARM
The middle word of Host MAC address.
The following table shows the register bit fields:
Bit
Default Value
R/W
Description
15-0
-
RW
MARM MAC Address Middle
The middle word of the MAC address.
Bank 2 Host MAC Address Register High (0x04): MARH
The high word of Host MAC address.
The following table shows the register bit fields.
Bit
Default Value
R/W
Description
15-0
-
RW
MARH MAC Address High
The Most significant word of the MAC address.
Bank 3 On-Chip Bus Control Register (0x00): OBCR
This register controls the on-chip bus speed for the KSZ8862M. It is used for power management when the external host
CPU is running at a slow frequency. The default of the on-chip bus speed is 125 MHz without EEPROM. When the
external host CPU is running at a higher clock rate, the on-chip bus should be adjusted for the best performance.
Bit
Default Value
R/W
Description
15-2
-
RO
Reserved
1-0
0x0
RW
OBSC On-Chip Bus Speed Control
00: 125MHz.
01: 62.5MHz.
10: 41.66MHz.
11: 25MHz.
Note: When external EEPROM is enabled, the bit 1 in Configparm word (0x6H) is used to
contol this speed as below:
Bit 1 = 0 , this value will be 00 for 125 MHz.
Bit 1 = 1 , this value will be 11 for 25 MHz.
(User still can write these two bits to change speed after EEPROM data loaded)
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Bank 3 EEPROM Control Register (0x02): EEPCR
To support an external EEPROM, tie the EEPROM Enable (EEEN) pin to High; otherwise, tie it to Low. If an external
EEPROM is not used, the default chip Base Address (0x300), and the software programs the host MAC address. If an
EEPROM is used in the design (EEPROM Enable pin to High), the chip Base Address and host MAC address are loaded
from the EEPROM immediately after reset. The KSZ8862M allows the software to access (read and write) the EEPROM
directly; that is, the EEPROM access timing can be fully controlled by the software if the EEPROM Software Access bit is
set.
Bit
Default Value
R/W
Description
15-5
-
RO
Reserved
4
0
RW
EESA EEPROM Software Access
1: enable software to access EEPROM through bit 3 to bit 0.
0: disable software to access EEPROM.
3
-
RO
EECB EEPROM Status Bit
Data Receive from EEPROM. This bit directly reads the EEDI pin.
2-0
0x0
RW
EECB EEPROM Control Bits
Bit 2: Data Transmit to EEPROM. This bit directly controls the device’s EEDO pin.
Bit 1: Serial Clock. This bit directly controls the device’s EESK pin.
Bit 0: Chip Select for EEPROM. This bit directly controls the device’s EECS pin.
Bank 3 Memory BIST INFO Register (0x04): MBIR
Bit
Default Value
R/W
Description
15-13
0x0
RO
Reserved
12
-
RO
TXMBF TX Memory Bist Finish
When set, it indicates the Memory Built In Self Test completion for the TX Memory.
11
-
RO
TXMBFA TX Memory Bist Fail
When set, it indicates the Memory Built In Self Test has failed.
10-5
-
RO
Reserved
4
-
RO
RXMBF RX Memory Bist Finish
When set, it indicates the Memory Built In Self Test completion for the RX Memory.
3
-
RO
RXMBFA RX Memory Bist Fail
When set, it indicates the Memory Built In Self Test has failed.
2-0
-
RO
Reserved
Bank 3 Global Reset Register (0x06): GRR
This register controls the global reset function with information programmed by the CPU.
Bit
Default Value
R/W
Description
15-1
0x0000
RO
Reserved
0
0
RW
Global Soft Reset
1: software reset is active.
0: software reset is inactive.
Software reset will affect PHY, MAC, QMU, DMA, and the switch core, only the BIU (base
address registers) remains unaffected by a software reset.
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Bank 3 Bus Configuration Register (0x08): BCFG
This register is a read-only register. The bit 0 is automatically downloaded from bit 0 Configparm word of EEPROM, if pin
EEEN is high (enabled EEPROM)
Bit
Default Value
R/W
Description
15-1
0x0000
RO
Reserved
0
-
RO
Bus Configuration (only for KSZ8862-16 device)
1: bus width is 16 bits.
0: bus width is 8 bits.
(this bit is only avaiable when EEPROM is enabled)
Banks 4 – 15: Reserved
Except Bank Select Register (0xE).
Bank 16 Transmit Control Register (0x00): TXCR
This register holds control information programmed by the CPU to control the QMU transmit module function.
Bit
Default Value
R/W
Description
15
-
RO
Reserved
14
0x0
RW
Reserved
13
0x0
RW
Reserved
12-4
-
RO
Reserved
3
0x0
RW
TXFCE Transmit Flow Control Enable
When this bit is set, the QMU sends flow control pause frames from the host port if the RX
FIFO has reached its threshold.
Note: the SGCR3[5] in Bank 32 also needs to be enabled.
2
0x0
RW
TXPE Transmit Padding Enable
When this bit is set, the KSZ8862M automatically adds a padding field to a packet shorter
than 64 bytes.
Note: Setting this bit requires enabling the ADD CRC feature to avoid CRC errors for the
transmit packet.
1
0x0
RW
TXCE Transmit CRC Enable
When this bit is set, the KSZ8862M automatically adds a CRC checksum field to the end of
a transmit frame.
0
0x0
RW
TXE Transmit Enable
When this bit is set, the transmit module is enabled and placed in a running state. When
reset, the transmit process is placed in the stopped state after the transmission of the
current frame is completed.
Bank 16 Transmit Status Register (0x02): TXSR
This register keeps the status of the last transmitted frame.
Bit
Default Value
R/W
Description
15-6
0x000
RO
Reserved
5-0
-
RO
TXFID Transmit Frame ID
This field identifies the transmitted frame. All of the transmit status information in this
register belongs to the frame with this ID.
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Bank 16 Receive Control Register (0x04): RXCR
This register holds control information programmed by the CPU to control the receive function.
Bit
Default Value
R/W
Description
15-11
-
RO
Reserved
10
0x0
RW
RXFCE Receive Flow Control Enable
When this bit is set, the KSZ8862M will acknowledge a PAUSE frame from the receive
interface; i.e., the outgoing packets are pending in the transmit buffer until the PAUSE
frame control timer expires. When this bit is cleared, flow control is not enabled.
9
0x0
RW
RXEFE Receive Error Frame Enable
When this bit is set, CRC error frames are allowed to be received into the RX queue. When
reset, all CRC error frames are discarded.
8
-
RO
Reserved
7
0x0
RW
RXBE Receive Broadcast Enable
When this bit is set, the RX module receives all the broadcast frames.
6
0x0
RW
RXME Receive Multicast Enable
When this bit is set, the RX module receives all the multicast frames (including broadcast
frames).
5
0x0
RW
RXUE Receive Unicast
When this bit is set, the RX module receives unicast frames that match the 48-bit Station
MAC address of the module.
4
0x0
RW
RXRA Receive All
When this bit is set, the KSZ8862M receives all incoming frames, regardless of the frame’s
destination address.
3
0x0
RW
RXSCE Receive Strip CRC
When this bit is set, the KSZ8862M strips the CRC on the received frames. Once cleared,
the CRC is stored in memory following the packet.
2
0x0
RW
QMU Receive Multicast Hash-Table Enable
When this bit is set, this bit enables the RX function to receive multicast frames that pass
the CRC Hash filtering mechanism.
1
-
RO
Reserved
0
0x0
RW
RXE Receive Enable
When this bit is set, the RX block is enabled and placed in a running state. When reset, the
receive process is placed in the stopped state upon completing reception of the current
frame.
Bank 16 TXQ Memory Information Register (0x08): TXMIR
This register indicates the amount of free memory available in the TXQ of the QMU module.
Bit
Default Value
R/W
Description
15-13
-
RO
Reserved
12-0
-
RO
TXMA Transmit Memory Available
The amount of memory available is represented in units of byte. The TXQ memory is used
for both frame payload, control word. There is total 4096 bytes in TXQ.
Note: Software must be written to ensure that there is enough memory for the next transmit
frame including control information before transmit data is written to the TXQ.
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Bank 16 RXQ Memory Information Register (0x0A): RXMIR
This register indicates the amount of receive data available in the RXQ of the QMU module.
Bit
Default Value
R/W
Description
15-13
12-0
-
RO
RO
Reserved
RXMA Receive Packet Data Available
The amount of Receive packet data available is represented in units of byte. The RXQ
memory is used for both frame payload, status word. There is total 4096 bytes in RXQ.
This counter will update after a complete packet is received and also issues an interrupt
when receive interrupt enable IER[13] in Bank 18 is set.
Note: Software must be written to empty the RXQ memory to allow for the new RX
frame. If this is not done, the frame may be discarded as a result of insufficient RXQ
memory.
Bank 17 TXQ Command Register (0x00): TXQCR
This register is programmed by the Host CPU to issue a transmit command to the TXQ. The present transmit frame in the
TXQ memory is queued for transmit.
Bit
Default Value
R/W
Description
15-1
0
0x0
RO
RW
Reserved
TXETF Enqueue TX Frame
When this bit is set as 1, the current TX frame prepared in the TX buffer is queued for
transmit.
Note: This bit is self-clearing after the frame is finished transmitting. The software should
wait for the bit to be cleared before setting up another new TX frame.
Bank 17 RXQ Command Register (0x02): RXQCR
This register is programmed by the Host CPU to issue release command to the RXQ. The current frame in the RXQ frame
buffer is read out by the host and the memory space is released.
Bit
Default Value
R/W
Description
15-1
0
0x0
RO
RW
Reserved Do not write to this register.
RXRRF Release RX Frame
When this bit is set as 1, the current RX frame buffer is released.
Note: This bit is self-clearing after the frame memory is released. The software should
wait for the bit to be cleared before processing new RX frames.
Bank 17 TX Frame Data Pointer Register (0x04): TXFDPR
The value of this register determines the address to be accessed within the TXQ frame buffer. When the AUTO increment
is set, it will automatically increment the pointer value on Write accesses to the data register.
The counter is incremented by one for every byte access, by two for every word access, and by four for every double
word access.
Bit
Default Value
R/W
Description
15
14
0x0
RO
RW
13-11
10-0
0x0
RO
RW
Reserved
TXFPAI TX Frame Data Pointer Auto Increment
When this bit is set, the TX Frame data pointer register increments automatically on
accesses to the data register. The increment is by one for every byte access, by two for
every word access, and by four for every doubleword access.
When this bit is reset, the TX frame data pointer is manually controlled by user to access
the TX frame location.
Reserved
TXFP TX Frame Pointer
TX Frame Pointer index to the Frame Data register for access.
This field reset to next available TX frame location when the TX Frame Data has been
enqueued through the TXQ command register.
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Bank 17 RX Frame Data Pointer Register (0x06): RXFDPR
The value of this register determines the address to be accessed within the RXQ frame buffer. When the Auto Increment
is set, it will automatically increment the RXQ Pointer on read accesses to the data register.
The counter is incremented is by one for every byte access, by two for every word access, and by four for every double
word access.
Bit
Default Value
R/W
Description
15
-
RO
Reserved
14
0x0
RW
RXFPAI RX Frame Pointer Auto Increment
When this bit is set, the RXQ Address register increments automatically on accesses to
the data register. The increment is by one for every byte access, by two for every word
access, and by four for every double word access.
When this bit is reset, the RX frame data pointer is manually controlled by user to access
the RX frame location.
13-11
-
RO
Reserved
10-0
0x0
RW
RXFP RX Frame Pointer
RX Frame data pointer index to the Data register for access.
This field reset to next available RX frame location when RX Frame release command is
issued (through the RXQ command register).
Bank 17 QMU Data Register Low (0x08): QDRL
This register QDRL(0x08-0x09) contains the Low data word presently addressed by the pointer register. Reading maps
from the RXQ, and writing maps to the TXQ.
Bit
Default Value
R/W
Description
15-0
-
RW
QDRL Queue Data Register Low
This register is mapped into two uni-directional buffers for 16-bit buses, and one unidirectional buffer for 32-bit buses, (TXQ when Write, RXQ when Read) that allow moving
words to and from the KSZ8862M regardless of whether the pointer is even, odd, or
Dword aligned. Byte, word, and Dword access can be mixed on the fly in any order. This
register along with DQRH is mapped into two consecutive word locations for 16-bit
buses, or one word location for 32-bit buses, to facilitate Dword move operations.
Bank 17 QMU Data Register High (0x0A): QDRH
This register QDRH(0x0A-0x0B) contains the High data word presently addressed by the pointer register. Reading maps
from the RXQ, and writing maps to the TXQ.
Bit
Default Value
R/W
Description
15-0
-
RW
QDRL Queue Data Register High
This register is mapped into two uni-directional buffers for 16-bit buses, and one unidirectional buffer for 32-bit buses, (TXQ when Write, RXQ when Read) that allow moving
words to and from the KSZ8862M regardless of whether the pointer is even, odd, or
dword aligned. Byte, word, and Dword access can be mixed on the fly in any order. This
register along with DQRL is mapped into two consecutive word locations for 16-bit
buses, or one word location for 32-bit buses, to facilitate Dword move operations.
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Bank 18 Interrupt Enable Register (0x00): IER
This register enables the interrupts from the QMU and other sources.
Bit
Default Value
R/W
Description
15
0x0
RW
LCIE Link Change Interrupt Enable
When this bit is set, the link change interrupt is enabled.
When this bit is reset, the link change interrupt is disabled.
14
0x0
RW
TXIE Transmit Interrupt Enable
When this bit is set, the transmit interrupt is enabled.
When this bit is reset, the transmit interrupt is disabled.
13
0x0
RW
RXIE Receive Interrupt Enable
When this bit is set, the receive interrupt is enabled.
When this bit is reset, the receive interrupt is disabled.
12
0x0
RW
Reserved
11
0x0
RW
RXOIE Receive Overrun Interrupt Enable
When this bit is set, the Receive Overrun interrupt is enabled.
When this bit is reset, the Receive Overrun interrupt is disabled.
10
0x0
RW
Reserved
9
0x0
RW
TXPSIE Transmit Process Stopped Interrupt Enable
When this bit is set, the Transmit Process Stopped interrupt is enabled.
When this bit is reset, the Transmit Process Stopped interrupt is disabled.
8
0x0
RW
RXPSIE Receive Process Stopped Interrupt Enable
When this bit is set, the Receive Process Stopped interrupt is enabled.
When this bit is reset, the Receive Process Stopped interrupt is disabled.
7
0x0
RW
RXEFIE Receive Error Frame Interrupt Enable
When this bit is set, the Receive error frame interrupt is enabled.
When this bit is reset, the Receive error frame interrupt is disabled.
6-0
-
RO
Reserved
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Bank 18 Interrupt Status Register (0x02): ISR
This register contains the status bits for all QMU and other interrupt sources.
When the corresponding enable bit is set, it causes the interrupt pin to be asserted.
This register is usually read by the host CPU and device drivers during interrupt service routine or polling. The register bits
are not cleared when read. The user has to write “1” to clear.
Bit
Default Value
R/W
Description
15
0x0
RO (W1C)
LCIS Link Change Interrupt Status
When this bit is set, it indicates that the link status has changed from link up to link down,
or link down to link up.
This edge-triggered interrupt status is cleared by writing 1 to this bit.
14
0x0
RO (W1C)
TXIS Transmit Status
When this bit is set, it indicates that the TXQ MAC has transmitted at least a frame on
the MAC interface and the QMU TXQ is ready for new frames from the host.
This edge-triggered interrupt status is cleared by writing 1 to this bit.
13
0x0
RO (W1C)
RXIS Receive Interrupt Status
When this bit is set, it indicates that the QMU RXQ has received a frame from the MAC
interface and the frame is ready for the host CPU to process.
This edge-triggered interrupt status is cleared by writing 1 to this bit.
12
0x0
RO
Reserved
11
0x0
RO (W1C)
RXOIS Receive Overrun Interrupt Status
When this bit is set, it indicates that the Receive Overrun status has occurred.
This edge-triggered interrupt status is cleared by writing 1 to this bit.
10
0x0
RO
Reserved
9
0x1
RO (W1C)
TXPSIE Transmit Process Stopped Status
When this bit is set, it indicates that the Transmit Process has stopped.
This edge-triggered interrupt status is cleared by writing 1 to this bit.
8
0x1
RO (W1C)
RXPSIE Receive Process Stopped Status
When this bit is set, it indicates that the Receive Process has stopped.
This edge-triggered interrupt status is cleared by writing 1 to this bit.
7
0x0
RO (W1C)
RXEFIE Receive Error Frame Interrupt Status
When this bit is set, it indicates that the Receive error frame status has occurred.
This edge-triggered interrupt status is cleared by writing 1 to this bit.
6-0
-
RO
Reserved
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Bank 18 Receive Status Register (0x04): RXSR
This register indicates the status of the current received frame and mirrors the Receive Status word of the Receive Frame
in the RXQ.
Bit
Default Value
R/W
Description
RXFV Receive Frame Valid
When set, it indicates that the present frame in the receive packet memory is valid. The
status information currently in this location is also valid.
When clear, it indicates that there is either no pending receive frame or that the current
frame is still in the process of receiving.
15
-
RO
14-10
-
RO
Reserved
9-8
-
RO
RXSPN Receive Source Port Number
When bit is set, this field indicates the source port where the packet was received.
(Setting bit 9 = 0 and bit 8 = 1 indicates the packet was received from port 1. Setting bit
9 = 1 and bit 8 = 0 indicates that the packet was received from port 2. Valid port is either
port 1 or port 2.
7
-
RO
RXBF Receive Broadcast Frame
When set, it indicates that this frame has a broadcast address.
6
-
RO
RXMF Receive Multicast Frame
When set, it indicates that this frame has a multicast address (including the broadcast
address).
5
-
RO
RXUF Receive Unicast Frame
When set, it indicates that this frame has a unicast address.
4
-
RO
Reserved
3
-
RO
RXFT Receive Frame Type
When set, it indicates that the frame is an Ethernet-type frame (frame length is greater
than 1500 bytes).
When clear, it indicate that the frame is an IEEE 802.3 frame.
This bit is not valid for runt frames.
2
-
RO
RXTL Receive Frame Too Long
When set, it indicates that the frame length exceeds the maximum size of 1916 bytes.
Frames that are too long are passed to the host only if the pass bad frame bit is set (bit 9
in RXCR register)
Note: Frame too long is only a frame length indication and does not cause any frame
truncation.
1
-
RO
RXRF Receive Runt Frame
When set, it indicates that a frame was damaged by a collision or premature termination
before the collision window has passed. Runt frames are passed to the host only if the
pass bad frame bit is set (bit 9 in RXCR register).
0
-
RO
RXCE Receive CRC Error
When set, it indicates that a CRC error has occurred on the current received frame. A
CRC error frame is passed to the host only if the pass bad frame bit is set (bit 9 in RXCR
register).
Bank 18 Receive Byte Counter Register (0x06): RXBC
This register indicates the status of the current received frame and mirrors the Receive Byte Count word of the Receive
Frame in the RXQ.
Bit
Default Value
R/W
Description
15-11
-
RO
Reserved
10-0
-
RO
RXBC Receive Byte Count
Receive Byte Count.
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Bank 19 Multicast Table Register 0 (0x00): MTR0
The 64-bit multicast table is used for group address filtering. This value is defined as the six most significant bits from
CRC circuit calculation result that is based on 48-bit of DA input. The two most significant bits select one of the four
registers to be used, while the others determine which bit within the register.
Multicast table register 0.
Bit
Default Value
R/W
Description
15-0
0x0000
RW
MTR0 Multicast Table 0
When the appropriate bit is set, if the packet received with DA matches the CRC, the
hashing function is received without being filtered.
When the appropriate bit is cleared, the packet will drop.
Note: When the receive all (RXRA) or receive multicast (RXRM) bit is set in the RXCR,
all multicast addresses are received regardless of the multicast table value.
Bank 19 Multicast Table Register 1 (0x02): MTR1
Multicast table register 1.
Bit
Default Value
R/W
Description
15-0
0x0000
RW
MTR0 Multicast Table 1
When the appropriate bit is set, if the packet received with DA matches the CRC, the
hashing function is received without being filtered.
When the appropriate bit is cleared, the packet will drop.
Note: When the receive all (RXRA) or receive multicast (RXRM) bit is set in the RXCR,
all multicast addresses are received regardless of the multicast table value.
Bank 19 Multicast Table Register 2 (0x04): MTR2
Multicast table register 2.
Bit
Default Value
R/W
Description
15-0
0x0000
RW
MTR0 Multicast Table 2
When the appropriate bit is set, if the packet received with DA matches the CRC, the
hashing function is received without being filtered.
When the appropriate bit is cleared, the packet will drop.
Note: When the receive all (RXRA) or receive multicast (RXRM) bit is set in the RXCR,
all multicast addresses are received regardless of the multicast table value.
Bank 19 Multicast Table Register 3 (0x06): MTR3
Multicast table register 3.
Bit
Default Value
R/W
Description
15-0
0x0000
RW
MTR0 Multicast Table 3
When the appropriate bit is set, if the packet received with DA matches the CRC, the
hashing function is received without being filtered.
When the appropriate bit is cleared, the packet will drop.
Note: When the receive all (RXRA) or receive multicast (RXRM) bit is set in the RXCR,
all multicast addresses are received regardless of the multicast table value.
Banks 20 – 31: Reserved
Except Bank Select Register (0xE).
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Bank 32 Switch ID and Enable Register (0x00): SIDER
This register contains the switch ID and the switch enable control.
Bit
Default
R/W
Description
15-8
0x88
RO
Family ID
Chip family ID
7-4
0x8
RO
Chip ID
0x8 is assigned to KSZ8862M
3-1
0x1
RO
Revision ID
0
0
RW
Start Switch
1 = start the chip.
0 = switch is disabled.
Bank 32 Switch Global Control Register 1 (0x02): SGCR1
This register contains the global control for the switch function.
Bit
Default
R/W
Description
15
0
RW
Pass All Frames
1 = switch all packets including bad ones. Used solely for debugging purposes. Works in
conjunction with Sniffer mode only.
14
0
RW
Reserved
13
1
RW
IEEE 802.3x Transmit Direction Flow Control Enable
1 = enables transmit direction flow control feature.
0 = will not enable transmit direction flow control feature. The switch will not generate any flow
control packets.
12
1
RW
IEEE 802.3x Receive Direction Flow Control Enable
1 = enables receive direction flow control feature.
0 = will not enable receive direction flow control feature. The switch will not react to any received
flow control packets.
11
0
RW
Frame Length Field Check
1 = checks frame length field in the IEEE packets. If the actual length does not match, the packet
will be dropped (for Length/Type field < 1500).
10
1
RW
Aging Enable
1 = enable age function in the chip.
0 = disable age function in the chip.
9
0
RW
Fast Age Enable
1 = turn on fast age (800us).
8
0
RW
Aggressive Back-Off Enable
1 = enable more aggressive back off algorithm in half-duplex mode to enhance performance. This
is not an IEEE standard.
7-4
-
RW
Reserved
3
0x0
RW
Pass Flow Control Packet
1 = switch will not filter 802.1x “flow control” packets.
2-1
-
RW
Reserved
0
0
RW
Link Change Age
1 = link change from “link” to “no link” will cause fast aging (<800us) to age address table faster.
After an age cycle is complete, the age logic will return to normal (300 + 75 seconds).
Note: If any port is unplugged, all addresses will be automatically aged out.
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Bank 32 Switch Global Control Register 2 (0x04): SGCR2
This register contains the global control for the switch function.
Bit
Default
R/W
Description
15
0
RW
802.1Q VLAN Enable
1 = 802.1Q VLAN mode is turned on. VLAN table must be set up before the operation.
0 = 802.1Q VLAN is disabled.
14
0
RW
IGMP Snoop Enable On Switch Host port
1 = IGMP snoop is enabled.
All the IGMP packets are forwarded to the Switch host port.
0 = IGMP snoop is disabled.
13
0
RW
Ipv6 MLD Snooping Enable
1 = enable IPv6 MLD snooping
12
0
RW
Ipv6 MLD Snooping Option
1 = enable IPv6 MLD snooping option
11
0
RW
Priority Scheme Select
0 = always TX higher priority packets first.
1 = Weighted Fair Queueing enabled. When all four queues have packets waiting to transmit, the
bandwidth allocation is q3:q2:q1:a0 = 8:4:2:1.
If any queues are empty, the highest non-empty queue gets one more weighting. For example, if q2
is empty, q3:q1:q0 becomes (8+1): 0:2:1.
10-9
0x0
RW
Reserved
8
0
RW
Sniff Mode Select
1 =performs RX and TX sniff (both the source port and destination port need to match).
0 = performs RX or TX sniff (either the source port or destination port needs to match). This is the
mode used to implement RX only sniff.
7
1
RW
Unicast Port-VLAN Mismatch Discard
1 = no packets can cross the VLAN boundary.
0 = unicast packets (excluding unknown/multicast/broadcast) can cross the VLAN boundary.
6
1
RW
Multicast Storm Protection Disable
1 = “Broadcast Storm Protection” does not include multicast packets. Only DA = FFFFFFFFFFFF
packets are regulated.
0 = “Broadcast Storm Protection” includes DA = FFFFFFFFFFFF and DA[40] = 1 packets.
5
1
RW
Back Pressure Mode
1 = carrier sense-based Back Pressure is selected.
0 = collision-based Back Pressure is selected.
4
1
RW
Flow Control And Back Pressure Fair Mode
1 = fair mode is selected. In this mode, if a flow control port and a non-flow control port talk to the
same destination port, packets from the non-flow control port may be dropped. This prevents the
flow control port from being flow controlled for an extended period of time.
0 = in this mode, if a flow control port and a non-flow control port talk to the same destination port,
the flow control port is flow controlled. This may not be “fair” to the flow control port.
3
0
RW
No Excessive Collision Drop
1 = the switch does not drop packets when 16 or more collisions occur.
0 = the switch drops packets when 16 or more collisions occur.
2
0
RW
Huge Packet Support
1 = accepts packet sizes up to 1916 bytes (inclusive). This bit setting overrides setting from bit 1 of
the same register.
0 = the max packet size is determined by bit 1 of this register.
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Bit
Default
R/W
Description
1
0
RW
Legal Maximum Packet Size Check Enable
0 = accepts packet sizes up to 1536 bytes (inclusive).
1 = 1522 bytes for tagged packets, 1518 bytes for untagged packets. Any packets larger than the
specified value are dropped.
0
1
RW
Priority Buffer Reserve
1 = each port is pre-allocated 48 buffers, used exclusively for high priority (q3, q2, and q1) packets.
Effective only when the multiple queue feature is turned on.
0 = each port is pre-allocated 48 buffers used for all priority packets (q3, q2,q1, and q0).
Bank 32 Switch Global Control Register 3 (0x06): SGCR3
This register contains the global control for the switch function.
Bit
Default
R/W
Description
15-8
0x63
RW
Broadcast Storm Protection Rate Bit [7:0]
These bits, along with SGCR3[2:0], determine how many 64-byte blocks of packet data are allowed
on an input port in a preset period. The period is 67ms for 100BT or 670ms for 10BT. The default is
1%.
7
0
RW
Reserved
6
0
RW
5
0
RW
4
0
RW
Switch Host Half-Duplex Mode
1 = enable host port interface half-duplex mode.
0 = enable host port interface full-duplex mode.
Switch Flow Control Enable
1 = enable full-duplex flow control on Switch Host port.
0 = disable full-duplex flow control on Switch Host port.
Reserved
3
0
RW
2-0
0x0
RW
Null VID Replacement
1 = replaces NULL VID with port VID(12 bits).
0 = no replacement for NULL VID.
Broadcast Storm Protection Rate Bit [10:8]
These bits, along with SGCR3[15:8] determine how many 64-byte blocks of packet data are allowed
on an input port in a preset period. The period is 67ms for 100BT or 670ms for 10BT. The default is
1%.
Rate: 148,800 frames/sec * 67 ms/interval * 1% = 99 frames/interval (approx.) = 0x63.
Bank 32 Switch Global Control Register 4 (0x08): SGCR4
This register contains the global control for the switch function.
Bit
Default
R/W
Description
15-0
0x2400
RW
Reserved
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Bank 32 Switch Global Control Register 5 (0x0A): SGCR5
This register contains the global control for the switch function.
Bit
Default
R/W
Description
15
0
RW
LEDSEL1
See the description in bit 9.
14-12
0x0
RW
Reserved
11-10
0x2
RW
Reserved
9
0
RW
LEDSEL0
These two bits, LEDSEL1 and LEDSEL0, are used to select LED mode.
Port n LED indicators, (where n = 1 for port 1 and n =2 for port 2) defined as below:
PnLED3
PnLED2
PnLED1
PnLED0
[LEDSEL1, LEDSEL0]
[0, 0]
[0, 1]
----------LINK/ACT
100LINK/ACT
FULL_DPX/COL
10LINK/ACT
SPEED
FULL_DPX
PnLED3
PnLED2
PnLED1
PnLED0
[LEDSEL1, LEDSEL0]
[1, 0]
[1, 1]
ACT
-----LINK
-----FULL_DPX/COL
-----SPEED
------
8
0
RW
Reserved
7-0
0x35
RW
Reserved
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Bank 33 Switch Global Control Register 6 (0x00): SGCR6
Bit
Default
R/W
Description
15-14
0x3
R/W
Tag_0x7
IEEE 802.1p mapping. The value in this field is used as the frame’s priority when its IEEE Tag has
a value of 0x7.
13-12
0x3
R/W
Tag_0x6
IEEE 802.1p mapping. The value in this field is used as the frame’s priority when its IEEE Tag has
a value of 0x6.
11-10
0x2
R/W
Tag_0x5
IEEE 802.1p mapping. The value in this field is used as the frame’s priority when its IEEE Tag has
a value of 0x5.
9-8
0x2
R/W
Tag_0x4
IEEE 802.1p mapping. The value in this field is used as the frame’s priority when its IEEE Tag has
a value of 0x4.
7-6
0x1
R/W
Tag_0x3
IEEE 802.1p mapping. The value in this field is used as the frame’s priority when its IEEE Tag has
a value of 0x3.
5-4
0x1
R/W
Tag_0x2
IEEE 802.1p mapping. The value in this field is used as the frame’s priority when its IEEE Tag has
a value of 0x2.
3-2
0x0
R/W
Tag_0x1
IEEE 802.1p mapping. The value in this field is used as the frame’s priority when its IEEE Tag has
a value of 0x1.
1-0
0x0
R/W
Tag_0x0
IEEE 802.1p mapping. The value in this field is used as the frame’s priority when its IEEE Tag has
a value of 0x0.
Bank 33 Switch Global Control Register 7 (0x02): SGCR7
Bit
Default
R/W
Description
15-8
0x00
R/W
Reserved
7
0
R/W
Unknown Default Port Enable
Send packets with unknown destination address to specified ports in bits [2:0].
1 = enable to send unknown DA packet
6-3
-
R/W
Reserved
2-0
0x7
R/W
Unknown Packet Default Port(s)
Specify which ports to send packets with unknown destination addresses. Feature is enabled by bit
[7].
Bit 2 for the host port, bit 1 for port 2, and bit 0 for port 1
Banks 34 – 38: Reserved
Except Bank Select Register (0xE)
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Bank 39 MAC Address Register 1 (0x00): MACAR1
This register contains the MAC address for the switch function. This MAC address is used for sending PAUSE frame.
Bit
15-0
Default
0x0010
R/W
Description
RW
MACA[47:32]
Specifies MAC address 1. This value has to be same as MARH in Bank2.
Bank 39 MAC Address Register 2 (0x02): MACAR2
This register contains the MAC address for the switch function. This MAC address is used for sending PAUSE frame.
Bit
Default
R/W
Description
15-0
0xA1FF
RW
MACA[31:16]
Specifies MAC address 2. This value has to be same as MARM in Bank2.
Bank 39 MAC Address Register 3 (0x04): MACAR3
This register contains the MAC address for the switch function. This MAC address is used for sending PAUSE frame.
Bit
Default
R/W
Description
15-0
0xFFFF
RW
MACA[15:0]
Specifies MAC address 3. This value has to be same as MARL in Bank2.
Bank 40 TOS Priority Control Register 1 (0x00): TOSR1
The Ipv4/Ipv6 ToS priority control registers implement a fully decoded,128-bit DSCP (Differentiated Services Code Point)
register used to determine priority from the 6-bit ToS (Type of Service) field in the IP header. The most significant 6 bits
of the ToS field are fully decoded into 64 possibilities, and the singular code that results is compared against the
corresponding bits in the DSCP register to determine the priority.
This register contains the ToS priority control for the switch function.
Bit
Default
R/W
Description
15-14
0
RW
DSCP[15:14]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x1c.
13-12
0
R/W
DSCP[13:12]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x18.
11-10
0
R/W
DSCP[11:10]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x14.
9-8
0
R/W
DSCP[9:8]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x10.
7-6
0
R/W
DSCP[7:6]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x0c.
5-4
0
R/W
DSCP[5:4]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x08.
3-2
0
R/W
DSCP[3:2]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x04.
1-0
0
R/W
DSCP[1:0]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x00.
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Bank 40 TOS Priority Control Register 2 (0x02): TOSR2
This register contains the TOS priority control for the switch function.
Bit
Default
R/W
Description
DSCP[31:30]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x3c.
DSCP[29:28]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x38.
DSCP[27:26]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x34.
DSCP[25:24]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x30.
DSCP[23:22]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x2c.
DSCP[21:20]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x28.
DSCP[19:18]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x24.
DSCP[17:16]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x20.
15-14
0
RW
13-12
0
R/W
11-10
0
R/W
9-8
0
R/W
7-6
0
R/W
5-4
0
R/W
3-2
0
R/W
1-0
0
R/W
Bank 40 TOS Priority Control Register 3 (0x04): TOSR3
This register contains the TOS priority control for the switch function.
Bit
Default
R/W
Description
15-14
0
RW
13-12
0
R/W
11-10
0
R/W
9-8
0
R/W
7-6
0
R/W
5-4
0
R/W
3-2
0
R/W
1-0
0
R/W
DSCP[47:46]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x5c.
DSCP[45:44]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x58.
DSCP[43:42]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x54.
DSCP[41:40]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x50.
DSCP[39:38]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x4c.
DSCP[37:36]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x48.
DSCP[35:34]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x44.
DSCP[33:32]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x40.
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Bank 40 TOS Priority Control Register 4 (0x06): TOSR4
This register contains the TOS priority control for the switch function.
Bit
Default
R/W
Description
15-14
0
RW
DSCP[63:62]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x7c.
13-12
0
R/W
DSCP[61:60]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x78.
11-10
0
R/W
DSCP[59:58]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x74.
9-8
0
R/W
DSCP[57:56]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x70.
7-6
0
R/W
DSCP[55:54]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x6c.
5-4
0
R/W
DSCP[53:52]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x68.
3-2
0
R/W
DSCP[51:50]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x64.
1-0
0
R/W
DSCP[49:48]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x60.
Bank 40 TOS Priority Control Register 5 (0x08): TOSR5
This register contains the TOS priority control for the switch function.
Bit
Default
R/W
Description
15-14
0
RW
DSCP[79:78]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x9c.
13-12
0
R/W
DSCP[77:76]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x98.
11-10
0
R/W
DSCP[75:74]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x94.
9-8
0
R/W
DSCP[73:72]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x90.
7-6
0
R/W
DSCP[71:70]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x8c.
5-4
0
R/W
DSCP[69:68]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x88.
3-2
0
R/W
DSCP[67:66]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x84.
August 2010
76
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Bit
Default
R/W
Description
1-0
0
R/W
DSCP[65:64]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0x80.
Bank 40 TOS Priority Control Register 6 (0x0A): TOSR6
This register contains the TOS priority control for the switch function.
Bit
Default
R/W
Description
15-14
0
RW
DSCP[95:94]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xbc.
13-12
0
R/W
DSCP[93:92]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xb8.
11-10
0
R/W
DSCP[91:90]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xb4.
9-8
0
R/W
DSCP[89:88]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xb0.
7-6
0
R/W
DSCP[87:86]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xac.
5-4
0
R/W
DSCP[85:84]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xa8.
3-2
0
R/W
DSCP[83:82]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xa4.
1-0
0
R/W
DSCP[81:80]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xa0.
Bank 41 TOS Priority Control Register 7 (0x00): TOSR7
This register contains the TOS priority control for the switch function.
Bit
Default
R/W
Description
15-14
0
RW
DSCP[111:110]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xdc.
13-12
0
R/W
DSCP[109:108]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xd8.
11-10
0
R/W
DSCP[107:106]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xd4.
9-8
0
R/W
DSCP[105:104]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xd0.
7-6
0
R/W
DSCP[103:102]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xcc.
August 2010
77
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Bit
Default
R/W
Description
5-4
0
R/W
DSCP[101:100]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xc8.
3-2
0
R/W
DSCP[99:98]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xc4.
1-0
0
R/W
DSCP[97:96]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xc0.
Bank 41 TOS Priority Control Register 8 (0x02): TOSR8
This register contains the TOS priority control for the switch function.
Bit
Default
R/W
Description
15-14
0
RW
DSCP[127:126]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xfc
13-12
0
R/W
DSCP[125:124]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xf8.
11-10
0
R/W
DSCP[123:122]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xf4.
9-8
0
R/W
DSCP[121:120]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xf0.
7-6
0
R/W
DSCP[119:118]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xec.
5-4
0
R/W
DSCP[117:116]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xe8.
3-2
0
R/W
DSCP[115:114]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xe4.
1-0
0
R/W
DSCP[113:112]
The value in this field is used as the frame’s priority when bits [7:2] of it IP TOS/DiffServ/Traffic
Class value is 0xe0.
Bank 42 Indirect Access Control Register (0x00): IACR
This register contains the indirect control for the switch function.
Bit
Default
R/W
Description
15-13
0x0
RW
Reserved
12
0
RW
Read High. Write Low
1 = read cycle.
0 = write cycle.
11-10
0x0
RW
Table Select
00 = static MAC address table selected.
01 = VLAN table selected.
10 = dynamic address table selected.
11 = MIB counter selected.
August 2010
78
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Bit
Default
R/W
Description
9-0
0x000
RW
Indirect Address
Bit 9-0 of indirect address.
Note: Write IACR triggers a command. Read or write access is determined by Register bit 12.
Bank 42 Indirect Access Data Register 1 (0x02): IADR1
This register contains the indirect data for the switch function.
Bit
Default
R/W
Description
15-8
0x00
RO
Reserved
7
0
RO
CPU Read Status
Only for dynamic and statistics counter reads.
1 = read is still in progress.
0 = read has completed.
6-3
0x0
RO
Reserved
2-0
0x0
RO
Indirect Data
Bit 66-64 of indirect data.
Bank 42 Indirect Access Data Register 2 (0x04): IADR2
This register contains the indirect data for the switch function.
Bit
Default
R/W
Description
15-0
0x0000
RW
Indirect Data
Bit 47-32 of indirect data.
Bank 42 Indirect Access Data Register 3 (0x06): IADR3
This register contains the indirect data for the switch function.
Bit
Default
R/W
Description
15-0
0x0000
RW
Indirect Data
Bit 63-48 of indirect data.
Bank 42 Indirect Access Data Register 4 (0x08): IADR4
This register contains the indirect data for the switch function.
Bit
Default
R/W
Description
15-0
0x0000
RW
Indirect Data
Bit 15-0 of indirect data.
Bank 42 Indirect Access Data Register 5 (0x0A): IADR5
This register contains the indirect data for the switch function.
Bit
Default
R/W
Description
15-0
0x0000
RW
Indirect Data
Bit 31-16 of indirect data.
Bank 43: Reserved
Except Bank Select Register (0xE)
August 2010
79
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Bank 44 Digital Testing Status Register (0x00): DTSR
This register contains the user defined register for the switch function.
Bit
Default
R/W
Description
15-3
0x0000
RO
Reserved
2-0
0x0
RO
Reserved
Bank 44 Analog Testing Status Register (0x02): ATSR
This register contains the user defined register for the switch function.
Bit
Default
R/W
Description
15-8
0x00
RO
Reserved
7-0
0x00
RO
Reserved
Bank 44 Digital Testing Control Register (0x04): DTCR
This register contains the user defined register for the switch function.
Bit
Default
R/W
Description
15-8
0x00
RO
Reserved
7-0
0x3F
RW
Reserved
Bank 44 Analog Testing Control Register 0 (0x06): ATCR0
This register contains the user defined register for the switch function.
Bit
Default
R/W
Description
15-8
7-6
0x00
0x00
RO
RW
5-0
0x00
RW
Reserved
LED Driver Current Set
00 = 60 mA
01 = 80 mA
10 = 97 mA
11 = 40 mA
Reserved
Bank 44 Analog Testing Control Register 1 (0x08): ATCR1
This register contains the user defined register for the switch function.
Bit
Default
R/W
Description
15-0
0x0000
RW
Reserved
Bank 44 Analog Testing Control Register 2 (0x0A): ATCR2
This register contains the user defined register for the switch function.
Bit
Default
R/W
Description
15-0
0x0000
RW
Reserved
Bank 45 PHY 1 MII-Register Basic Control Register (0x00): P1MBCR
This register contains Media Independent Interface (MII) register for switch port 1 as defined in the IEEE 802.3
specification.
Bit
Default
R/W
Description
15
0
RO
Soft reset
Not supported.
14
0
RW
Far-End Loopback
1 = perform loopback as follows:
August 2010
Bit is same as:
Bank 49 0x02 bit 8
80
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Bit
Default
R/W
Description
Start: RXP2/RXM2 (port 2)
Loop back: PMD/PMA of port 1’s PHY
End: TXP2/TXM2 (port 2)
0 = normal operation.
Bit is same as:
13
0
RW
Force 100
1 = force 100Mbps if AN is disabled (bit 12)
0 = force 10Mbps if AN is disabled (bit 12)
Bank 49 0x02 bit 6
12
1
RW
AN Enable (Note 1)
1 = auto-negotiation enabled.
0 = auto-negotiation disabled.
Bank 49 0x02 bit 7
11
0
RW
Power-Down
1 = power-down.
0 = normal operation.
Bank 49 0x02 bit 11
10
0
RO
Isolate
Not supported.
9
0
RW
Restart AN (Note 1)
1 = restart auto-negotiation.
0 = normal operation.
Bank 49 0x02 bit 13
8
0
RW
Force Full Duplex
1 = force full duplex.
0 = force half duplex.
if AN is disabled (bit 12) or AN is enabled but failed.
Bank 49 0x02 bit 5
7
0
RO
Collision test
Not supported.
6
0
RO
Reserved.
5
1
R/W
HP_mdix
1 = HP Auto MDI-X mode.
0 = Micrel Auto MDI-X mode.
Bank 49 0x04 bit 15
4
0
RW
Force MDI-X
1 = force MDI-X.
0 = normal operation.
Bank 49 0x02 bit 9
3
0
RW
Disable MDI-X
1 = disable auto MDI-X.
0 = normal operation.
Bank 49 0x02 bit 10
2
0
RW
Disable Far-End-Fault
1 = disable far-end-fault detection.
0 = normal operation.
Bank 49 0x02 bit 12
1
0
RW
Disable Transmit
1 = disable transmit.
0 = normal operation.
Bank 49 0x02 bit 14
0
0
RW
Disable LED
1 = disable LED.
0 = normal operation.
Bank 49 0x02 bit 15
Note 1: Auto Negotiation is not supporting on port 1.
August 2010
81
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Bank 45 PHY 1 MII-Register Basic Status Register (0x02): P1MBSR
This register contains the MII register status for the switch port 1 function.
Bit
Default
R/W
Description
Bit is same as:
15
0
RO
T4 Capable
1 = 100 BASE-T4 capable.
0 = not 100 BASE-T4 capable.
14
1
RO
100 Full Capable
1 = 100BASE-TX full-duplex capable.
0 = not 100BASE-TX full duplex capable.
13
1
RO
100 Half Capable
1 = 100BASE-TX half-duplex capable.
0 = not 100BASE-TX half-duplex capable.
12
1
RO
10 Full Capable
1 = 10BASE-T full-duplex capable.
0 = not 10BASE-T full-duplex capable.
11
1
RO
10 Half Capable
1 = 10BASE-T half-duplex capable.
0 = not 10BASE-T half-duplex capable.
10-7
0x0
RO
Reserved
6
0
RO
Preamble Suppressed
Not supported.
5
0
RO
Reserved
Bank 49 0x04 bit 6
4
0
RO
Far-End-Fault
1 = far-end-fault detected.
0 = no far-end-fault detected.
Bank 49 0x04 bit 8
3
1
RO
Reserved
2
0
RO
Link Status
1 = link is up.
0 = link is down.
1
0
RO
Jabber test
Not supported.
0
0
RO
Extended Capable
1 = extended register capable.
0 = not extended register capable.
Bank49 0x04 bit 5
Bank 45 PHY 1 PHYID Low Register (0x04): PHY1ILR
This register contains the PHY ID (low) for the switch port 1 function.
Bit
Default
R/W
Description
15-0
0x1430
RO
PHYID Low
Low order PHYID bits.
Bank 45 PHY 1 PHYID High Register (0x06): PHY1IHR
This register contains the PHY ID (high) for the switch port 1 function.
Bit
Default
R/W
Description
15-0
0x0022
RO
PHYID High
High order PHYID bits.
August 2010
82
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Bank 45 PHY 1 Auto-Negotiation Advertisement Register (0x08): P1ANAR
This register contains the auto-negotiation advertisement for the switch port 1 function.
Bit
Default
R/W
Description
Bit is same as:
15
0
RO
Next page
Not supported.
14
0
RO
Reserved
13
0
RO
Remote fault
Not supported.
12-11
0x0
RO
Reserved
10
1
RW
Pause (flow control capability)
1 = advertise pause ability.
0 = do not advertise pause capability.
9
0
RW
Reserved
8
1
RW
Adv 100 Full
1 = advertise 100 full-duplex capable.
0 = do not advertise 100 full-duplex capability.
Bank49 0x02 bit 3
7
1
RW
Adv 100 Half
1= advertise 100 half-duplex capable.
0 = do not advertise 100 half-duplex capability.
Bank49 0x02 bit 2
6
1
RW
Adv 10 Full
1 = advertise 10 full-duplex capable.
0 = do not advertise 10 full-duplex capability.
Bank49 0x02 bit 1
5
1
RW
Adv 10 Half
1 = advertise 10 half-duplex capable.
0 = do not advertise 10 half-duplex capability.
Bank49 0x02 bit 0
4-0
0x01
RO
Selector Field
802.3
Bank 49 0x02 bit 4
Bank 45 PHY 1 Auto-Negotiation Link Partner Ability Register (0x0A): P1ANLPR
This register contains the auto-negotiation link partner ability for the switch port 1 function.
Bit
Default
R/W
Description
15
0
RO
Next page
Not supported.
14
0
RO
LP ACK
Not supported.
13
0
RO
Remote fault
Not supported.
12-11
0x0
RO
Reserved
10
0
RO
Pause
Link partner pause capability.
9
0
RO
Reserved
8
0
RO
Adv 100 Full
Link partner 100 full capability.
Bank 49 0x04 bit 3
7
0
RO
Adv 100 Half
Link partner 100 half capability.
Bank 49 0x04 bit 2
6
0
RO
Adv 10 Full
Link partner 10 full capability.
Bank 49 0x04 bit 1
5
0
RO
Adv 10 Half
Link partner 10 half capability.
Bank 49 0x04 bit 0
4-0
0x01
RO
Reserved
August 2010
Bit is same as:
Bank 49 0x04 bit 4
83
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Bank 46 PHY 2 MII-Register Basic Control Register (0x00): P2MBCR
This register contains Media Independent Interface (MII) control for the switch function as defined in the IEEE 802.3
specification.
Bit
Default
R/W
Description
15
0
RO
Soft reset
Not supported.
14
0
RW
Far-End Loopback
1 = perform loop back, as indicated (see Figure14):
Start: RXP1/RXM1 (port 1)
Loop back: PMD/PMA of port 2’s PHY
End: TXP1/TXM1 (port 1)
0 = normal operation.
Bank 51 0x02 bit 8
13
0
RW
Force 100
1 = 100 Mbps.
0 = 10 Mbps.
Bank 51 0x02 bit 6
12
1
RW
AN Enable
1 = auto-negotiation enabled.
0 = auto-negotiation disabled.
Bank 51 0x02 bit 7
11
0
RW
Power Down
1 = power down.
0 = normal operation.
Bank 51 0x02 bit 11
10
0
RO
Isolate
Not supported.
9
0
RW
Restart AN
1 = restart auto-negotiation.
0 = normal operation,
Bank 51 0x02 bit 13
8
0
RW
Force Full Duplex
1 = full duplex.
0 = half duplex.
Bank 51 0x02 bit 5
7
0
RO
Collision test
Not supported.
6
0
RO
Reserved
5
1
R/W
HP_mdix
1 = HP Auto MDI-X mode.
0 = Micrel Auto MDI-X mode.
Bank 51 0x04 bit 15
4
0
RW
Force MDI-X
1 = force MDI-X.
0 = normal operation.
Bank 51 0x02 bit 9
3
0
RW
Disable MDI-X
1 = disable auto MDI-X.
0 = normal operation.
Bank 51 0x02 bit 10
2
0
RW
Reserved
Bank 51 0x02 bit 12
1
0
RW
Disable Transmit
1 = disable transmit.
0 = normal operation.
Bank 51 0x02 bit 14
0
0
RW
Disable LED
1 = disable LED.
0 = normal operation.
Bank 51 0x02 bit 15
August 2010
Bit is same as:
84
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Bank 46 PHY 2 MII-Register Basic Status Register (0x02): P2MBSR
This register contains the MII register for the switch port 2 function.
Bit
Default
R/W
Description
Bit is same as:
15
0
RO
T4 Capable
0 = not 100 BASE-T4 capable.
14
1
RO
100 Full Capable
1 = 100BASE-TX full-duplex capable.
0 = not 100BASE-TX full-duplex capable.
13
1
RO
100 Half Capable
1 = 100BASE-TX half-duplex capable.
0 = not 100BASE-TX half-duplex capable.
12
1
RO
10 Full Capable
1 = 10BASE-T full-duplex capable.
0 = not 10BASE-T full-duplex capable.
11
1
RO
10 Half Capable
1 = 10BASE-T half-duplex capable.
0 = not 10BASE-T half-duplex capable.
10-7
0x0
RO
Reserved
6
0
RO
Preamble suppressed
Not supported.
5
0
RO
AN Complete
1 = auto-negotiation complete.
0 = auto-negotiation not complete.
Bank 51 0x04 bit 6
4
0
RO
Reserved
Bank 51 0x04 bit 8
3
1
RO
AN Capable
1 = auto-negotiation capable.
0 = not auto-negotiation capable.
2
0
RO
Link Status
1 = link is up.
0 = link is down.
1
0
RO
Jabber test
Not supported.
0
0
RO
Extended Capable
0 = not extended register capable.
Bank 51 0x04 bit 5
Bank 46 PHY 2 PHYID Low Register (0x04): PHY2ILR
This register contains the PHY ID (low) for the switch port 2 function.
Bit
Default
R/W
Description
15-0
0x1430
RO
PHYID Low
Low order PHYID bits.
Bank 46 PHY 2 PHYID High Register (0x06): PHY2IHR
This register contains the PHY ID (high) for the switch port 2 function.
Bit
Default
R/W
Description
15-0
0x0022
RO
PHYID High
High order PHYID bits.
August 2010
85
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Bank 46 PHY 2 Auto-Negotiation Advertisement Register (0x08): P2ANAR
This register contains the auto-negotiation advertisement for the switch port 2 function.
Bit
Default
R/W
Description
Bit is same as:
15
0
RO
Next page
Not supported.
14
0
RO
Reserved
13
0
RO
Remote fault
Not supported.
12-11
0x0
RO
Reserved
10
1
RW
Pause
1 = advertise pause capability.
0 = do not advertise pause capability.
9
0
RW
Reserved
8
1
RW
Adv 100 Full
1 = advertise 100 full-duplex capability.
0 = do not advertise 100 full-duplex capability.
Bank 51 0x02 bit 3
7
1
RW
Adv 100 Half
1 = advertise 100 half-duplex capability.
0 = do not advertise 100 half-duplex capability.
Bank 51 0x02 bit 2
6
1
RW
Adv 10 Full
1 = advertise 10 full-duplex capability.
0 = do not advertise 10 full-duplex capability.
Bank 51 0x02 bit 1
5
1
RW
Adv 10 Half
1= advertise 10 half-duplex capability.
0 = do not advertise 10 half-duplex capability.
Bank 51 0x02 bit 0
4-0
0x01
RO
Selector Field
802.3
Bank 51 0x02 bit 4
Bank 46 PHY 2 Auto-Negotiation Link Partner Ability Register (0x0A): P2ANLPR
This register contains the auto-negotiation link partner ability for the switch port 2 function.
Bit
Default
R/W
Description
15
0
RO
Next page
Not supported.
14
0
RO
LP ACK
Not supported.
13
0
RO
Remote fault
Not supported.
12-11
0x0
RO
Reserved
10
0
RO
Pause
Link partner pause capability.
9
0
RO
Reserved
8
0
RO
Adv 100 Full
Link partner 100 full capability.
Bank 51 0x04 bit 3
7
0
RO
Adv 100 Half
Link partner 100 half capability.
Bank 51 0x04 bit 2
6
0
RO
Adv 10 Full
Link partner 10 full capability.
Bank 51 0x04 bit 1
5
0
RO
Adv 10 Half
Link partner 10 half capability.
Bank 51 0x04 bit 0
4-0
0x01
RO
Reserved
August 2010
Bit is same as:
Bank 51 0x04 bit 4
86
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Bank 47 PHY1 Special Control/Status Register (0x02): P1PHYCTRL
This register contains the control and status information of PHY1.
Bit
Default
R/W
Description
Bit is same as:
15-6
0x000
RO
Reserved
5
0
RO
Polarity Reverse (polrvs)
1 = polarity is reversed.
0 = polarity is not reversed.
Bank 49 0x04 bit 13
4
0
RO
MDI-X Status (mdix_st)
1 = MDI
0 = MDI-X
Bank 49 0x04 bit 7
3
0
RW
Force Link (force_lnk)
1 = force link pass.
0 = normal operation.
Bank 49 0x00 bit 11
2
1
RW
Power Saving (pwrsave)
1 = disable power saving.
0 = enable power saving.
Bank 49 0x00 bit 10
1
0
RW
Bank 49 0x00 bit 9
0
0
RW
Remote (Near-End) Loopback (rlb)
1 = perform remote loopback at Port 1's PHY (RXP1/RXM1 ->
TXP1/TXM1, see Figure 15)
0 = normal operation
Reserved
®
Bank 47 PHY2 LinkMD Control/Status (0x04): P2VCT
®
This register contains the LinkMD control and status information of PHY 2.
Bit
Default
R/W
Description
Bit is same as:
15
0
(SelfClear)
RW
Vct_enable
1 = the cable diagnostic test is enabled. It is self-cleared after
the VCT test is done.
0 = it indicates the cable diagnostic test is completed and the
status information is valid for read.
Bank 51 0x00 bit 12
14-13
0x0
RO
Vct_result
[00] = normal condition.
[01] = open condition detected in the cable.
[10] = short condition detected in the cable.
[11] = cable diagnostic test failed.
Bank 51 0x00 bit 14-13
12
-
RO
Vct 10M Short
1 = Less than 10m short.
Bank 51 0x00 bit 15
11-9
0x0
RO
Reserved
8-0
0x000
RO
Vct_fault_count
Distance to the fault. The distance is approximately
0.4m*vct_fault_count.
August 2010
87
Bank 51 0x00 bit 8-0
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Bank 47 PHY2 Special Control/Status Register (0x06): P2PHYCTRL
This register contains the control and status information of PHY2.
Bit
Default
R/W
Description
Bit is same as:
15-6
0x000
RO
Reserved
5
0
RO
Polarity reverse (polrvs)
1 = polarity is reversed.
0 = polarity is not reversed.
Bank 51 0x04 bit 13
4
0
RO
MDIX Status (mdix_st)
1 = MDI
0 = MDI-X
Bank 51 0x04 bit 7
3
0
RW
Force Link (force_lnk)
1 = force link pass.
0 = normal operation.
Bank 51 0x00 bit 11
2
1
RW
Power Saving (pwrsave)
1 = disable power saving.
0 = enable power saving.
Bank 51 0x00 bit 10
1
0
RW
Remote (Near-End) Loopback (rlb)
1 = perform remote loopback at Port 2's PHY(RXP2/RXM2 ->
TXP2/TXM2. see Figure 15)
0 = normal operation
Bank 51 0x00 bit 9
0
0
RW
Reserved
Bank 48 Port 1 Control Register 1 (0x00): P1CR1
This register contains the global per port control for the switch function.
Bit
Default
R/W
Description
15-8
0x00
RO
Reserved
7
0
RW
Broadcast Storm Protection Enable
1 = enable broadcast storm protection for ingress packets on the port.
0 = disable broadcast storm protection.
6
0
RW
Diffserv Priority Classification Enable
1= enable DiffServ priority classification for ingress packets on the port.
0 = disable DiffServ function.
5
0
RW
802.1p Priority Classification Enable
1= enable 802.1p priority classification for ingress packets on the port.
0 = disable 802.1p.
4-3
0x0
RW
Port-Based Priority Classification
00 - ingress packets on port are classified as priority 0 queue if “DiffServ” or “802.1p” classification
is not enabled or fails to classify.
01 - ingress packets on port are classified as priority 1 queue if “DiffServ” or “802.1p” classification
is not enabled or fails to classify.
10 - ingress packets on port are classified as priority 2 queue if “DiffServ” or “802.1p” classification
is not enabled or fails to classify.
11 - ingress packets on port are classified as priority 3 queue if “Diffserv” or “802.1p” classification is
not enabled or fails to classify.
Note: “DiffServ”, “802.1p” and port priority can be enabled at the same time. The OR’ed result of
802.1p and DSCP overwrites the port priority.
2
0
RW
Tag Insertion
1 = when packets are output on the port, the switch adds 802.1p/q tags to packets without 802.1p/q
tags when received. The switch will not add tags to packets already tagged. The tag inserted is the
ingress port’s “port VID”.
0 = disable tag insertion.
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KSZ8862-16/32MQL
Bit
Default
R/W
Description
1
0
RW
Tag Removal
1 = when packets are output on the port, the switch removes 802.1p/q tags from packets with
802.1p/q tags when received. The switch will not modify packets received without tags.
0 = disable tag removal.
0
0
RW
TX Multiple Queues Select Enable
1 = the port output queue is split into four priority queues.
0 = single output queue on the port. There is no priority differentiation even though packets are
classified into high or low priority.
Bank 48 Port 1 Control Register 2 (0x02): P1CR2
This register contains the global per port control for the switch function.
Bit
Default
R/W
Description
15
0
RW
Reserved
14
0
RW
Ingress VLAN Filtering
1= the switch discards packets whose VID port membership in VLAN table bits [18:16] does not
include the ingress port VID.
0 = no ingress VLAN filtering.
13
0
RW
Discard Non PVID Packets
1 = the switch discards packets whose VID does not match the ingress port default VID.
0 = no packets are discarded.
12
0
RW
Force Flow Control
1 = always enable flow control on the port, regardless of AN result.
0 = the flow control is enabled based on AN result.
11
0
RW
Back Pressure Enable
1 = enable port’s half-duplex back pressure.
0 = disable port’s half-duplex back pressure.
10
1
RW
Transmit Enable
1 = enable packet transmission on the port.
0 = disable packet transmission on the port.
9
1
RW
Receive Enable
1 = enable packet reception on the port.
0 = disable packet reception on the port.
8
0
RW
Learning Disable
1 = disable switch address learning capability.
0 = enable switch address learning.
7
0
RW
Sniffer Port
1 = port is designated as a sniffer port and transmits packets that are monitored.
0 = port is a normal port.
6
0
RW
Receive Sniff
1 = all packets received on the port are marked as “monitored packets” and forwarded to the
designated “sniffer port.”
0 = no receive monitoring.
5
0
RW
Transmit Sniff
1 = all packets transmitted on the port are marked as “monitored packets” and forwarded to the
designated “sniffer port.”
0 = no transmit monitoring.
4
0
RW
Reserved
August 2010
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Micrel, Inc.
KSZ8862-16/32MQL
Bit
Default
R/W
Description
3
0
RW
User Priority Ceiling
1 = if the packet’s “priority field” is greater than the “user priority field” in the port VID control register
bit[15:13], replace the packet’s “priority field” with the “user priority field” in the port VID control
register bit[15:13].
0 = do no compare and replace the packet’s “priority field.”
2-0
0x7
RW
Port VLAN Membership
Define the port’s Port VLAN membership. Bit 2 stands for the host port, bit 1 for port 2, and bit 0 for
port 1. The port can only communicate within the membership. A ‘1’ includes a port in the
membership; a ‘0’ excludes a port from the membership.
Bank 48 Port 1 VID Control Register (0x04): P1VIDCR
This register contains the global per port control for the switch function.
Bit
Default
R/W
Description
15-13
0x0
RW
Default Tag[15:13]
Port’s default tag, containing “User Priority Field” bits.
12
0
RW
Default Tag[12]
Port’s default tag, containing CFI bit.
11-0
0x001
RW
Default Tag[11:0]
Port’s default tag, containing VID[11:0].
Note: This VID Control register serves two purposes:
1. Associated with the ingress untagged packets, and used for egress tagging.
2. Default VID for the ingress untagged or null-VID-tagged packets, and used for address lookup.
Bank 48 Port 1 Control Register 3 (0x06): P1CR3
Bit
Default
R/W
Description
15-5
0x000
RO
Reserved
4
0x0
RW
Reserved
3-2
0x0
RW
Ingress Limit Mode
These bits determine what kinds of frames are limited and counted against Ingress limiting as
follows:
00 = Limit and count all frames.
01 = Limit and count Broadcast, Multicast, and flooded unicast frames.
10 = Limit and count Broadcast and Multicast frames only.
11 = Limit and count Broadcast frames only.
1
0
RW
Count IFG
Count IFG Bytes.
1= each frame’s minimum inter frame gap.
(IFG) bytes (12 per frame) are included in Ingress and Egress rate limiting calculations.
0= IFG bytes are not counted.
0
0
RW
Count Preamble
Count preamble Bytes.
1 = each frame’s preamble bytes (8 per frame) are included in Ingress and Egress rate limiting
calculations.
0 = preamble bytes are not counted.
August 2010
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Micrel, Inc.
KSZ8862-16/32MQL
Bank 48 Port 1 Ingress Rate Control Register (0x08): P1IRCR
Bit
Default
R/W
Description
15-12
0x0
RW
Ingress Pri3 Rate
Priority 3 frames will be discarded after the ingress rate selected as shown below is reached or
exceeded.
0000 = Not limited (default)
0001 = 64Kbps
0010 = 128Kbps
0011 = 256Kbps
0100 = 512Kbps
0101 = 1Mbps
0110 = 2Mbps
0111 = 4Mbps
1000 = 8Mbps
1001 = 16Mbps
1010 = 32Mbps
1011 = 48Mbps
1100 = 64 Mbps
1101 = 72Mbps
1110 = 80Mbps
1111 = 88Mbps
Note: For 10BT, rate settings above 10Mbps are set to the default value 0000 (not limited).
11-8
0x0
RW
Ingress Pri2 Rate
Priority 2 frames will be discarded after the ingress rate selected as shown below is reached or
exceeded.
0000 = Not limited (default)
0001 = 64Kbps
0010 = 128Kbps
0011 = 256Kbps
0100 = 512Kbps
0101 = 1Mbps
0110 = 2Mbps
0111 = 4Mbps
1000 = 8Mbps
1001 = 16Mbps
1010 = 32Mbps
1011 = 48Mbps
1100 = 64 Mbps
1101 = 72Mbps
1110 = 80Mbps
1111 = 88Mbps
Note: For 10BT, rate settings above 10Mbps are set to the default value 0000 (not limited).
7-4
0x0
August 2010
RW
Ingress Pri1 Rate
Priority 1 frames will be discarded after the ingress rate selected as shown below is reached or
exceeded.
0000 = Not limited (default)
0001 = 64Kbps
0010 = 128Kbps
0011 = 256Kbps
0100 = 512Kbps
0101 = 1Mbps
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KSZ8862-16/32MQL
Bit
Default
R/W
Description
0110 = 2Mbps
0111 = 4Mbps
1000 = 8Mbps
1001 = 16Mbps
1010 = 32Mbps
1011 = 48Mbps
1100 = 64 Mbps
1101 = 72Mbps
1110 = 80Mbps
1111 = 88Mbps
Note: For 10BT, rate settings above 10Mbps are set to the default value 0000 (not limited).
3-0
0x0
RW
Ingress Pri0 Rate
Priority 0 frames will be discarded after the ingress rate selected as shown below is reached or
exceeded.
0000 = Not limited (default)
0001 = 64Kbps
0010 = 128Kbps
0011 = 256Kbps
0100 = 512Kbps
0101 = 1Mbps
0110 = 2Mbps
0111 = 4Mbps
1000 = 8Mbps
1001 = 16Mbps
1010 = 32Mbps
1011 = 48Mbps
1100 = 64 Mbps
1101 = 72Mbps
1110 = 80Mbps
1111 = 88Mbps
Note: For 10BT, rate settings above 10Mbps are set to the default value 0000 (not limited).
August 2010
92
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
Bank 48 Port 1 Egress Rate Control Register (0x0A): P1ERCR
Bit
Default
R/W
Description
15-12
0x0
RW
Egress Pri3 Rate
Egress data rate limit for priority 3 frames.
Output traffic from this priority queue is shaped according to the egress rate selected below:
0000 = Not limited (default)
0001 = 64Kbps
0010 = 128Kbps
0011 = 256Kbps
0100 = 512Kbps
0101 = 1Mbps
0110 = 2Mbps
0111 = 4Mbps
1000 = 8Mbps
1001 = 16Mbps
1010 = 32Mbps
1011 = 48Mbps
1100 = 64 Mbps
1101 = 72Mbps
1110 = 80Mbps
1111 = 88Mbps
Notes: For 10BT, rate settings above 10Mbps are set to the default value 0000 (not limited).
When multiple queue select enable is off (only 1 queue per port), rate limiting applies only to priority
0 queue.
11-8
0x0
RW
Egress Pri2 Rate
Egress data rate limit for priority 2 frames.
Output traffic from this priority queue is shaped according to the egress rate selected below:
0000 = Not limited (default)
0001 = 64Kbps
0010 = 128Kbps
0011 = 256Kbps
0100 = 512Kbps
0101 = 1Mbps
0110 = 2Mbps
0111 = 4Mbps
1000 = 8Mbps
1001 = 16Mbps
1010 = 32Mbps
1011 = 48Mbps
1100 = 64 Mbps
1101 = 72Mbps
1110 = 80Mbps
1111 = 88Mbps
Notes: For 10BT, rate settings above 10Mbps are set to the default value 0000 (not limited).
When multiple queue select enable is off (only 1 queue per port), rate limiting applies only to priority
0 queue.
7-4
0x0
RW
Egress Pri1 Rate
Egress data rate limit for priority 1 frames.
Output traffic from this priority queue is shaped according to the egress rate selected below:
0000 = Not limited (default)
0001 = 64Kbps
0010 = 128Kbps
0011 = 256Kbps
0100 = 512Kbps
0101 = 1Mbps
August 2010
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Bit
Default
KSZ8862-16/32MQL
R/W
Description
0110 = 2Mbps
0111 = 4Mbps
1000 = 8Mbps
1001 = 16Mbps
1010 = 32Mbps
1011 = 48Mbps
1100 = 64 Mbps
1101 = 72Mbps
1110 = 80Mbps
1111 = 88Mbps
Notes: For 10BT, rate settings above 10Mbps are set to the default value 0000 (not limited).
When multiple queue select enable is off (only 1 queue per port), rate limiting applies only to priority
0 queue.
3-0
0x0
August 2010
RW
Egress Pri0 Rate
Egress data rate limit for priority 0 frames.
Output traffic from this priority queue is shaped according to the egress rate selected below:
0000 = Not limited (default)
0001 = 64Kbps
0010 = 128Kbps
0011 = 256Kbps
0100 = 512Kbps
0101 = 1Mbps
0110 = 2Mbps
0111 = 4Mbps
1000 = 8Mbps
1001 = 16Mbps
1010 = 32Mbps
1011 = 48Mbps
1100 = 64 Mbps
1101 = 72Mbps
1110 = 80Mbps
1111 = 88Mbps
Notes: For 10BT, rate settings above 10Mbps are set to the default value 0000 (not limited).
When multiple queue select enable is off (only 1 queue per port), rate limiting applies only to priority
0 queue.
94
M9999-081310-3.1
Micrel, Inc.
KSZ8862-16/32MQL
®
Bank 49 Port 1 PHY Special Control/Status, LinkMD (0x00): P1SCSLMD
Bit
Default
R/W
Description
Bit is same as:
15
0
RO
Reserved
14-13
0x0
RO
Reserved
12
0
RW
Reserved
11
0
RW
Force_lnk
Force link.
1 = force link pass.
0 = normal operation.
Bank 47 0x02 bit 3
10
1
RW
pwrsave
Power-saving.
1 = disable power saving.
0 = enable power saving.
Bank 47 0x02 bit 2
9
0
RW
Remote (Near-End) Loopback (rlb)
1 = perform remote loopback at Port 1's PHY (RXP1/RXM1 ->
TXP1/TXM1, see Figure 15)
0 = normal operation
Bank 47 0x02 bit 1
8-0
0x000
RO
Reserved
Bank 49 Port 1 Control Register 4 (0x02): P1CR4
This register contains the global per port control for the switch function.
Bit
Default
R/W
Description
Bit is same as:
15
0
RW
LED Off
1 = Turn off all of the port 1 LEDs (P1LED3, P1LED2, P1LED1,
P1LED0). These pins are driven high if this bit is set to one.
0 = normal operation.
Bank 45 0x00 bit 0
14
0
RW
Txids
1 = disable the port’s transmitter.
0 = normal operation.
Bank 45 0x00 bit1
13
0
RW
Restart AN (Note 1)
1 = restart auto-negotiation.
0 = normal operation.
Bank 45 0x00 bit 9
12
0
RW
Disable Far-End-Fault
1 = disable far-end-fault detection and pattern transmission.
0 = enable far end fault detection and pattern transmission.
Bank 45 0x00 bit 2
11
0
RW
Power Down
1 = power down.
0 = normal operation.
Bank 45 0x00 bit 11
10
0
RW
Disable auto MDI/MDI-X
1 = disable auto MDI/MDI-X function.
0 = enable auto MDI/MDI-X function.
Bank 45 0x00 bit 3
9
0
RW
Force MDI-X
1= if auto MDI/MDI-X is disabled, force PHY into MDI-X mode.
0 = do not force PHY into MDI-X mode.
Bank 45 0x00 bit 4
8
0
RW
Far-End Loopback
1 = perform loopback, as indicated:
Start: RXP2/RXM2 (port 2).
Loopback: PMD/PMA of port 1’s PHY.
End: TXP2/TXM2 (port 2).
0 = normal operation.
Bank 45 0x00 bit 14
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KSZ8862-16/32MQL
Bit
Default
R/W
Description
Bit is same as:
7
1
RW
Auto Negotiation Enable (Note 1)
1 = auto negotiation is enabled.
0 = disable auto negotiation, speed, and duplex are decided by bits 6
and 5 of the same register.
Bank 45 0x00 bit 12
6
0
RW
Force Speed
1 = force 100BT if AN is disabled (bit 7).
0 = force 10BT if AN is disabled (bit 7).
Bank 45 0x00 bit 13
5
0
RW
Force Duplex
1 = force full duplex if (1) AN is disabled or (2) AN is enabled but failed.
0 = force half duplex if (1) AN is disabled or (2) AN is enabled but failed.
Bank 45 0x00 bit 8
4
1
RW
Advertised flow control capability.
1 = advertise flow control (pause) capability.
0 = suppress flow control (pause) capability from transmission to link
partner.
Bank 45 0x08 bit 10
3
1
RW
Advertised 100BT full-duplex capability.
1 = advertise 100BT full-duplex capability.
0 = suppress 100BT full-duplex capability from transmission to link
partner.
Bank 45 0x08 bit 8
2
1
RW
Advertised 100BT half-duplex capability.
1 = advertise 100BT half-duplex capability.
0 = suppress 100BT half-duplex capability from transmission to link
partner.
Bank 45 0x08 bit 7
1
1
RW
Advertised 10BT full-duplex capability.
1 = advertise 10BT full-duplex capability.
0 = suppress 10BT full-duplex capability from transmission to link
partner.
Bank 45 0x08 bit 6
0
1
RW
Advertised 10BT half-duplex capability.
1 = advertise 10BT half-duplex capability.
0 = suppress 10BT half-duplex capability from transmission to link
partner.
Bank 45 0x08 bit 5
Bank 49 Port 1 Status Register (0x04): P1SR
This register contains the global per port status for the switch function.
Bit
Default
R/W
Description
Bit is same as:
15
1
RW
HP_mdix
1 = HP Auto MDI-X mode.
0 = Micrel Auto MDI-X mode.
Bank 45 0x00 bit 5
14
0
RO
Reserved
13
0
RO
Polarity Reverse
1 = polarity is reversed.
0 = polarity is not reversed.
12
0
RO
Receive Flow Control Enable
1 = receive flow control feature is active.
0 = receive flow control feature is inactive.
11
0
RO
Transmit Flow Control Enable
1 = transmit flow control feature is active.
0 = transmit flow control feature is inactive.
10
0
RO
Operation Speed
1 = link speed is 100Mbps.
0 = link speed is 10Mbps.
August 2010
Bank 47 0x02 bit 5
96
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Micrel, Inc.
KSZ8862-16/32MQL
Bit
Default
R/W
Description
9
0
RO
Operation Duplex
1 = link duplex is full.
0 = link duplex is half.
Bit is same as:
8
0
RO
Far-End-Fault
1 = far-end-fault status detected.
0 = no Far-end-fault status detected.
Bank 45 0x02 bit 4
7
0
RO
MDI-X status
1 = MDI.
0 = MDI-X.
Bank 47 0x02 bit 4
6
0
RO
Reserved
Bank 45 0x02 bit 5
5
0
RO
Link Good
1 = link good.
0 = link not good.
Bank 45 0x02 bit 2
4
0
RO
Partner flow control capability.
1 = link partner flow control (pause) capable.
0 = link partner not flow control (pause) capable.
Bank 45 0x0A bit 10
3
0
RO
Partner 100BT full-duplex capability.
1 = link partner 100BT full-duplex capable.
0 = link partner not 100BT full-duplex capable.
Bank 45 0x0A bit 8
2
0
RO
Partner 100BT half-duplex capability.
1 = link partner 100BT half-duplex capable.
0= link partner not 100BT half-duplex capable.
Bank 45 0x0A bit 7
1
0
RO
Partner 10BT full-duplex capability.
1= link partner 10BT full-duplex capable.
0 = link partner not 10BT full-duplex capable.
Bank 45 0x0A bit 6
0
0
RO
Partner 10BT half-duplex capability.
1 = link partner 10BT half-duplex capable.
0 = link partner not 10BT half-duplex capable.
Bank 45 0x0A bit 5
Bank 50 Port 2 Control Register 1 (0x00): P2CR1
This register contains the global per port control for the switch function. See description in P1CR1, Bank 48 (0x00)
Bank 50 Port 2 Control Register 2 (0x02): P2CR2
This register contains the global per port control for the switch function. See description in P1CR2, Bank 48 (0x02)
Bank 50 Port 2 VID Control Register (0x04): P2VIDCR
This register contains the global per port control for the switch function. See description in P1VIDCR, Bank 48 (0x04)
Bank 50 Port 2 Control Register 3 (0x06): P2CR3
This register contains the global per port control for the switch function. See description in P1CR3, Bank 48 (0x06)
Bank 50 Port 2 Ingress Rate Control Register (0x08): P2IRCR
This register contains per port ingress rate control. See description in P1IRCR, Bank 48 (0x08)
Bank 50 Port 2 Egress Rate Control Register (0x0A): P2ERCR
This register contains per port egress rate control. See description in P1ERCR, Bank 48 (0x0A)
August 2010
97
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Micrel, Inc.
KSZ8862-16/32MQL
®
Bank 51 Port 2 PHY Special Control/Status, LinkMD (0x00): P2SCSLMD
Bit
Default
R/W
Description
Bit is same as:
15
0
RO
Vct_10m_short
1 = Less than 10 meter short.
Bank 47 0x04 bit 12
14-13
0x0
RO
Vct_result
VCT result.
[00] = normal condition.
[01] = open condition has been detected in the cable.
[10] = short condition has been detected in the cable.
[11] = cable diagnostic test has failed.
Bank 47 0x04 bit 14-13
12
0
RW
SC
Vct_en
VCT enable.
1 = the cable diagnostic test is enabled. It is self-cleared after the VCT
test is done.
0 = it indicates the cable diagnostic test is completed and the status
information is valid for read
Bank 47 0x04 bit 15
11
0
RW
Force_lnk
Force link.
1 = force link pass.
0 = normal operation.
Bank 47 0x06 bit 3
10
1
RW
Pwrsave
Power-saving.
1 = disable power saving.
0 = enable power saving.
Bank 47 0x06 bit 2
9
0
RW
Remote (Near-End) Loopback (rlb)
1 = perform remote loopback at Port 2's PHY (RXP2/RXM2 ->
TXP2/TXM2, see Figure 15)
0 = normal operation
Bank 47 0x06 bit 1
8-0
0x000
RO
Vct_fault_count
VCT fault count.
The distance to the fault is approximately 0.4m*vct_fault_count.
Bank 47 0x04 bit 8-0
August 2010
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Bank 51 Port 2 Control Register 4 (0x02): P2CR4
This register contains the global per port control for the switch function.
Bit
Default
R/W
Description
Bit is same as:
15
0
RW
LED Off
1 = turn off all of the port 2 LEDs (P2LED3, P2LED2, P2LED1,
P2LED0). These pins are driven High if this bit is set to 1.
0 = normal operation.
Bank 46 0x00 bit 0
14
0
RW
Txids
1 = disable port’s transmitter.
0 = normal operation.
Bank 46 0x00 bit 1
13
0
RW
Restart AN
1 = restart auto-negotiation.
0 = normal operation.
Bank 46 0x00 bit 9
12
0
RW
Reserved
Bank 46 0x00 bit 2
11
0
RW
Power Down
1 = power-down.
0 = normal operation.
Bank 46 0x00 bit 11
10
0
RW
Disable Auto MDI/MDI-X
1= disable auto MDI/MDI-X function.
0= enable auto MDI/MDI-X function.
Bank 46 0x00 bit 3
9
0
RW
Force MDI-X
1 = if auto MDI/MDI-X is disabled, force PHY into MDI-X mode.
0 = do not force PHY into MDI-X mode.
Bank 46 0x00 bit 4
8
0
RW
Far-End Loopback
1 = perform loopback, as indicated (see Figure 14):
Start: RXP1/RXM1 (port 1).
Loopback: PMD/PMA of port 2’s PHY.
End: TXP1/TXM1 (port 1).
0 = normal operation.
Bank 46 0x00 bit 14
7
1
RW
Auto Negotiation Enable
0 = disable auto negotiation, speed and duplex are decided by bits 6
and 5 of the same register.
1 = auto negotiation is ON.
Bank 46 0x00 bit 12
6
0
RW
Force Speed
1 = force 100BT if AN is disabled (bit 7).
0 = force 10BT if AN is disabled (bit 7).
Bank 46 0x00 bit 13
5
0
RW
Force Duplex
1 = force full duplex if (1) AN is disabled or (2) AN is enabled but failed.
0 = force half duplex if (1) AN is disabled or (2) AN is enabled but failed.
Bank 46 0x00 bit 8
4
1
RW
Advertised flow control capability.
1 = advertise flow control (pause) capability.
0 = suppress flow control (pause) capability from transmission to the
link partner.
Bank 46 0x08 bit 10
3
1
RW
Advertised 100BT Full-duplex capability.
1 = advertise 100BT full-duplex capability.
0 = suppress 100BT full-duplex capability from transmission to the link
partner.
Bank 46 0x08 bit 8
2
1
RW
Advertised 100BT half-duplex capability.
1 = advertise 100BT half-duplex capability.
1 = suppress 100BT half-duplex capability from transmission to the link
partner.
Bank 46 0x08 bit 7
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Bit
Default
R/W
Description
Bit is same as:
1
1
RW
Advertised 10BT full-duplex capability.
1 = advertise 10BT full-duplex capability.
0 = suppress 10BT full-duplex capability from transmission to the link
partner.
Bank 46 0x08 bit 6
0
1
RW
Advertised 10BT half-duplex capability.
1 = advertise 10BT half-duplex capability.
0 = suppress 10BT half-duplex capability from transmission to the link
partner.
Bank 46 0x08 bit 5
Bank 51 Port 2 Status Register (0x04): P2SR
This register contains the global per port status for the switch function.
Bit
Default
R/W
Description
Bit is same as:
15
1
RW
HP_mdix
1 = HP Auto MDI-X mode.
0 = Micrel Auto MDI-X mode.
Bank 46 0x00 bit 5
14
0
RO
Reserved
13
0
RO
Polarity Reverse
1 = polarity is reversed.
0 = polarity is not reversed.
12
0
RO
Receive Flow Control Enable
1 = receive flow control feature is active.
0 = receive flow control feature is inactive.
11
0
RO
Transmit Flow Control Enable
1 = transmit flow control feature is active.
0 = transmit flow control feature is inactive.
10
0
RO
Operation Speed
1 = link speed is 100Mbps.
0 = link speed is 10Mbps.
9
0
RO
Operation Duplex
1 = link duplex is full.
0 = link duplex is half.
8
0
RO
Reserved
Bank 46 0x02 bit 4
7
0
RO
MDI-X Status
1 = MDI.
0 = MDI-X.
Bank 47 0x06 bit 4
6
0
RO
AN Done
1 = AN done.
0 = AN not done.
Bank 46 0x02 bit 5
5
0
RO
Link Good
1 = link good.
0 = link not good.
Bank 46 0x02 bit 2
4
0
RO
Partner flow control capability.
1 = link partner flow control (pause) capable.
0 = link partner not flow control (pause) capable.
Bank 46 0x0A bit 10
3
0
RO
Partner 100BT full-duplex capability.
1 = link partner 100BT full-duplex capable.
0 = link partner not 100BT full-duplex capable.
Bank 46 0x0A bit 8
August 2010
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Bit
Default
R/W
Description
Bit is same as:
2
0
RO
Partner 100BT half duplex capability.
1 = link partner 100BT half-duplex capable.
0 = link partner not 100BT half-duplex capable.
Bank 46 0x0A bit 7
1
0
RO
Partner 10BT full-duplex capability.
1 = link partner 10BT full-duplex capable.
0 = link partner not 10BT full-duplex capable.
Bank 46 0x0A bit 6
0
0
RO
Partner 10BT half-duplex capability.
1 = link partner 10BT half-duplex capable.
0 = link partner not 10BT half-duplex capable.
Bank 46 0x0A bit 5
Bank 52 Host Port Control Register 1 (0x00): P3CR1
This register contains the global per port control for the switch function. See description in P1CR1, Bank 48 (0x00)
Bank 52 Host Port Control Register 2 (0x02): P3CR2
This register contains the global per port control for the switch function.
Bit
Default
15
0
14
0
RW
Ingress VLAN Filtering
1 = the switch discards packets whose VID port membership in VLAN table bits [18:16] does not
include the ingress port.
0 = no ingress VLAN filtering.
13
0
RW
Discard Non PVID Packets
1 = the switch discards packets whose VID does not match the ingress port default VID.
0 = no packets are discarded.
12
0
RO
Reserved
11
0
RO
Reserved
10
1
RW
Transmit Enable
1 = enable packet transmission on the port.
0 = disable packet transmission on the port.
9
1
RW
Receive Enable
1 = enable packet reception on the port.
0 = disable packet reception on the port.
8
0
RW
Learning Disable
1 = disable switch address learning capability.
0 = enable switch address learning.
7
0
RW
Sniffer Port
1 = port is designated as the sniffer port and transmits packets that are monitored.
0 = port is a normal port.
6
0
RW
Receive Sniff
1 = all packets received on the port are marked as “monitored packets” and forwarded to the
designated “sniffer port”.
0 = no receive monitoring.
5
0
RW
Transmit Sniff
1 = all packets transmitted on the port are marked as “monitored packets” and forwarded to the
designated “sniffer port”.
0 = no transmit monitoring.
4
0
RW
Reserved
August 2010
R/W
Description
Reserved
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Bit
Default
R/W
Description
3
0
RW
User Priority Ceiling
1 = if the packet’s “user priority field” is greater than the “user priority field” in the port default tag
register, replace the packet’s “user priority field” with the “user priority field” in the port default tag
register.
0 = do no compare and replace the packet’s ‘user priority field.”
2-0
0x7
RW
Port VLAN Membership
Define the port’s Port VLAN membership. Bit 2 stands for host port, bit 1 for port 2, and bit 0 for port
1. The port can only communicate within the membership. A ‘1’ includes a port in the membership; a
‘0’ excludes a port from the membership.
Bank 52 Host Port VID Control Register (0x04): P3VIDCR
This register contains the global per port control for the switch function. See description in P1VIDCR, Bank 48 (0x04)
Bank 52 Host Port Control Register 3 (0x06): P3CR3
This register contains the global per port control for the switch function. See description in P1CR3, Bank 48 (0x06)
Bank 52 Host Port Ingress Rate Control Register (0x08): P3IRCR
This register contains per port ingress rate control. See description in P1IRCR, Bank 48 (0x08)
Bank 52 Host Port Egress Rate Control Register (0x0A): P3ERCR
This register contains per port egress rate control. See description in P1ERCR, Bank 48 (0x0A)
Banks 53 – 63: Reserved
Except Bank Select Register (0xE)
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MIB (Management Information Base) Counters
The KSZ8862M provides 34 MIB counters for each port. These counters are used to monitor the port activity for network
management. The MIB counters are formatted “per port” as shown in Table 14 and “all ports dropped packet” as shown in
Table 16.
Bit
Name
R/W
Description
Default
31
Overflow
RO
1: counter overflow.
0: no counter overflow.
0
30
Count valid
RO
1: counter value is valid.
0: counter value is not valid.
0
29-0
Counter values
RO
Counter value (read clear)
0x00000000
Table 14. Format of Per Port MIB Counters
“Per Port” MIB counters are read using indirect memory access. The base address offsets and address ranges for both
Ethernet ports are:
Port 1, base address is 0x00 and range is from 0x00 to 0x1f.
Port 2, base address is 0x20 and range is from 0x20 to 0x3f.
Per port MIB counters are read using indirect access control register in IACR, Bank 42 (0x00) and indirect access data
registers in IADR4[15:0], IADR5[31:16]. Table 15 shows the port 1 MIB counters address memory offset.
Offset
Counter Name
Description
0x0
RxLoPriorityByte
Rx lo-priority (default) octet count including bad packets
0x1
RxHiPriorityByte
Rx hi-priority octet count including bad packets
0x2
RxUndersizePkt
Rx undersize packets w/ good CRC
0x3
RxFragments
Rx fragment packets w/ bad CRC, symbol errors or alignment errors
0x4
RxOversize
Rx oversize packets w/ good CRC (max: 1536 or 1522 bytes)
0x5
RxJabbers
Rx packets longer than 1522 bytes w/ either CRC errors, alignment errors, or symbol
errors (depends on max packet size setting)
0x6
RxSymbolError
Rx packets w/ invalid data symbol and legal packet size.
0x7
RxCRCError
Rx packets within (64,1522) bytes w/ an integral number of bytes and a bad CRC
(upper limit depends on max packet size setting)
0x8
RxAlignmentError
Rx packets within (64,1522) bytes w/ a non-integral number of bytes and a bad CRC
(upper limit depends on max packet size setting)
0x9
RxControl8808Pkts
Number of MAC control frames received by a port with 88-08h in EtherType field
0xA
RxPausePkts
Number of PAUSE frames received by a port. PAUSE frame is qualified with EtherType
(88-08h), DA, control opcode (00-01), data length (64B min), and a valid CRC
0xB
RxBroadcast
Rx good broadcast packets (not including error broadcast packets or valid multicast
packets)
0xC
RxMulticast
Rx good multicast packets (not including MAC control frames, error multicast packets
or valid broadcast packets)
0xD
RxUnicast
Rx good unicast packets
0xE
Rx64Octets
Total Rx packets (bad packets included) that were 64 octets in length
0xF
Rx65to127Octets
Total Rx packets (bad packets included) that are between 65 and 127 octets in length
0x10
Rx128to255Octets
Total Rx packets (bad packets included) that are between 128 and 255 octets in length
0x11
Rx256to511Octets
Total Rx packets (bad packets included) that are between 256 and 511 octets in length
0x12
Rx512to1023Octets
Total Rx packets (bad packets included) that are between 512 and 1023 octets in length
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Offset
Counter Name
Description
0x13
Rx1024to1522Octets
Total Rx packets (bad packets included) that are between 1024 and 1522 octets in
length (upper limit depends on max packet size setting)
0x14
TxLoPriorityByte
Tx lo-priority good octet count, including PAUSE packets
0x15
TxHiPriorityByte
Tx hi-priority good octet count, including PAUSE packets
0x16
TxLateCollision
The number of times a collision is detected later than 512 bit-times into the Tx of a
packet
0x17
TxPausePkts
Number of PAUSE frames transmitted by a port
0x18
TxBroadcastPkts
Tx good broadcast packets (not including error broadcast or valid multicast packets)
0x19
TxMulticastPkts
Tx good multicast packets (not including error multicast packets or valid broadcast
packets)
0x1A
TxUnicastPkts
Tx good unicast packets
0x1B
TxDeferred
Tx packets by a port for which the 1st Tx attempt is delayed due to the busy medium
0x1C
TxTotalCollision
Tx total collision, half duplex only
0x1D
TxExcessiveCollision
A count of frames for which Tx fails due to excessive collisions
0x1E
TxSingleCollision
Successfully Tx frames on a port for which Tx is inhibited by exactly one collision
0x1F
TxMultipleCollision
Successfully Tx frames on a port for which Tx is inhibited by more than one collision
Table 15. Port 1 MIB Counters Indirect Memory Offset
Format of “All Ports Dropped Packet” MIB Counters
Bit
Default
R/W
Description
30-16
-
N/A
Reserved
15-0
0x0000
RO
Counter Value
Table 16. “All Ports Dropped Packet” MIB Counters Format
Note: “All Ports Dropped Packet” MIB Counters do not indicate overflow or validity; therefore, the application must keep track of
overflow and valid conditions.
“All Ports Dropped Packet” MIB counters are read using indirect memory access. The address offsets for these counters
are shown in Table 17.
Offset
Counter Name
Description
0x100
Port1 TX Drop Packets
TX packets dropped due to lack of resources
0x101
Port2 TX Drop Packets
TX packets dropped due to lack of resources
0x103
Port1 RX Drop Packets
RX packets dropped due to lack of resources
0x104
Port2 RX Drop Packets
RX packets dropped due to lack of resources
Table 17. “All Ports Dropped Packet” MIB Counters Indirect Memory Offsets
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Examples:
1. MIB Counter Read (read port 1 “Rx64Octets” counter at indirect address offset 0x0E)
Write to reg. IACR with 0x1c0e (set indirect address and trigger a read MIB counters operation)
Then
Read reg. IADR5 (MIB counter value 31-16) // If bit 31 = 1, there was a counter overflow
// If bit 30 = 0, restart (reread) from this register
Read reg. IADR4 (MIB counter value 15-0)
2. MIB Counter Read (read port 2 “Rx64Octets” counter at indirect address offset 0x2E)
Write to reg. IACR with 0x1c2e (set indirect address and trigger a read MIB counters operation)
Then
Read reg. IADR5 (MIB counter value 31-16) // If bit 31 = 1, there was a counter overflow
// If bit 30 = 0, restart (reread) from this register
Read reg. IADR4 (MIB counter value 15-0)
3. MIB Counter Read (read “Port1 TX Drop Packets” counter at indirect address offset 0x100)
Write to reg. IACR with 0x1d00 (set indirect address and trigger a read MIB counters operation)
Then
Read reg. IADR4 (MIB counter value 15-0)
Additional MIB Information
Per Port MIB counters are designed as “read clear”. That is, these counters will be cleared after they are read.
All Ports Dropped Packet MIB counters are not cleared after they are accessed. The application needs to keep
track of overflow and valid conditions on these counters.
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Static MAC Address Table
The KSZ8862M supports both a static and a dynamic MAC address table. In response to a Destination Address (DA) look
up, The KSZ8862M searches both tables to make a packet forwarding decision. In response to a Source Address (SA)
look up, only the dynamic table is searched for aging, migration and learning purposes.
The static DA look up result takes precedence over the dynamic DA look up result. If there is a DA match in both tables,
the result from the static table is used. These entries in the static table will not be aged out by the KSZ8862M.
Bit
Default Value
R/W
Description
57-54
0000
RW
FID
Filter VLAN ID - identifies one of the 16 active VLANs.
53
0
R/W
Use FID
1: specifies the useof FID+MAC for static table look ups
0: specifies only the use of MAC for static table look ups
52
0
R/W
Override
1: overrides the port setting “transmit enable = 0” or “receive enable = 0” setting.
0: specifies no override
51
0
R/W
Valid
1: specifies that this entry is valid, the look up result will be used
0: specifies that this entry is not valid
50-48
000
R/W
Forwarding ports
These 3 bits control the forwarding port(s):
000: no forward
001: forward to port 1
010: forward to port 2
100: forward to port 3
011: forward to port 1 and port 2
110: forward to port 2 and port 3
101: forward to port 1 and port 3
111: broadcasting (excluding the ingress port)
47-0
0
R/W
MAC address
48 bits MAC Address
Table 18. Static MAC Table Format (8 Entries)
Static MAC Table Lookup Examples:
1. Static Address Table Read (read the second entry at indirect address offset 0x01)
Write to reg. IACR with 0x1001 (set indirect address and trigger a read static MAC table operation)
Then
Read reg. IADR3 (static MAC table bits 57-48)
Read reg. IADR2 (static MAC table bits 47-32)
Read reg. IADR5 (static MAC table bits 31-16)
Read reg. IADR4 (static MAC table bits 15-0)
2. Static Address Table Write (write the eighth entry at indirect address offset 0x07)
Write to reg. IADR3 (static MAC table bits 57-48)
Write to reg. IADR2 (static MAC table bits 47-32)
Write to reg. IADR5 (static MAC table bits 31-16)
Write to reg. IADR4 (static MAC table bits 15-0)
Write to reg. IACR with 0x0007 (set indirect address and trigger a write static MAC table operation)
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Dynamic MAC Address Table
The Dynamic MAC address is a read only table.
Bit
Default Value
R/W
Description
71
RO
Data not ready
1: specifies that the entry is not ready, continue retrying until bit is set to 0
0: specifies that the entry is ready
70-67
RO
Reserved
66
1
RO
MAC empty
1: specifies that there is no valid entry in the table
0: specifies that there are valid entries in the table
65-56
0x000
RO
No of valid entries
Indicates how many valid entries in the table
0x3ff means 1 K entries
0x001 means 2 entries
0x000 and bit 66 = 0 means 1 entry
0x000 and bit 66 = 1 means 0 entry
RO
Time Stamp
Specifies the 2-bit counter for internal aging.
Source port
Identifies the source port where FID+MAC is learned:
00: port 1
01: port 2
10: port 3
55-54
53-52
00
RO
51-48
0x0
RO
FID
Specifies the filter ID.
47-0
0x0000_0000_0000
RO
MAC Address
Specifies the 48-bit MAC address.
Table 19. Dynamic MAC Address Table Format (1024 Entries)
Dynamic MAC Address Lookup Example:
Dynamic MAC Address Table Read (read the first entry at indirect address offset 0 and retrieve the MAC
table size)
Write to reg. IACR with 0x1800 (set indirect address and trigger a read dynamic MAC table operation)
Then
Read reg. IADR1 (dynamic MAC table bits 71-64) // If bit 71 = 1, restart (reread) from this register
Read reg. IADR3 (dynamic MAC table bits 63-48)
Read reg. IADR2 (dynamic MAC table bits 47-32)
Read reg. IADR5 (dynamic MAC table bits 31-16)
Read reg. IADR4 (dynamic MAC table bits 15-0)
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VLAN Table
The KSZ8862M uses the VLAN table to perform look-ups. If 802.1Q VLAN mode is enabled (SGCR2[15]), this table will
be used to retrieve the VLAN information that is associated with the ingress packet. This information includes FID (filter
ID), VID (VLAN ID), and VLAN membership as described in Table 20:
Bit
Default Value
R/W
Description
19
1
RW
Valid
1: specifies that this entry is valid, the look up result will be used
0: specifies that this entry is not valid
18-16
111
R/W
Membership
Specifies which ports are members of the VLAN. If a DA look up fails (no match in
both static and dynamic tables), the packet associated with this VLAN will be
forwarded to ports specified in this field. For example: 101 means port 3 and 1 are in
this VLAN.
15-12
0x0
R/W
FID
Specifies the Filter ID. The KSZ8862M supports 16 active VLANs represented by
these four bit fields. The FID is the mapped ID. If 802.1Q VLAN is enabled, the look
up will be based on FID+DA and FID+SA.
11-0
0x001
R/W
VID
Specifies the IEEE 802.1Q 12 bits VLAN ID.
Table 20. VLAN Table Format (16 Entries)
If 802.1Q VLAN mode is enabled, then the KSZ8862M will assign a VID to every ingress packet. If the packet is untagged
or tagged with a null VID, then the packet is assigned with the default port VID of the ingress port. If the packet is tagged
with non null VID, the VID in the tag will be used. The look up process will start from the VLAN table look up. If the VID is
not valid, the packet will be dropped and no address learning will take place. If the VID is valid, the FID is retrieved. The
FID+DA and FID+SA lookups are performed. The FID+DA look up determines the forwarding ports. If FID+DA fails, the
packet will be broadcast to all the members (excluding the ingress port) of the VLAN. If FID+SA fail, the FID+SA will be
learned.
VLAN Table Lookup Examples:
Examples:
1. VLAN Table Read (read the third entry, at the indirect address offset 0x02)
Write to reg. IACR with 0x1402 (set indirect address and trigger a read VLAN table operation)
Then
Read reg. IADR5 (VLAN table bits 19-16)
Read reg. IADR4 (VLAN table bits 15-0)
2. VLAN Table Write (write the seventh entry, at the indirect address offset 0x06)
Write to reg. IADR5 (VLAN table bits 19-16)
Write to reg. IADR4 (VLAN table bits 15-0)
Write to reg. IACR with 0x1406 (set indirect address and trigger a read VLAN table operation)
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Absolute Maximum Ratings(1)
Description
Pins
Value
Supply Voltage
VDDATX, VDDARX, VDDIO
–0.5V to 4.0V
Input Voltage
All Inputs
–0.5V to 5V
Output Voltage
All Outputs
–0.5V to 4.0V
Lead Temperature (soldering, 10 sec)
N/A
270°C
Storage Temperature (Ts)
N/A
–55°C to 150°C
Table 21. Maximum Ratings
Note: Exceeding the absolute maximum rating may damage the device. Stresses greater than those listed in the table above may cause permanent
damage to the device. Operation of the device at these or any other conditions above those specified in the operating sections of this specification is not
implied. Maximum conditions for extended periods may affect reliability. Unused inputs must always be tied to an appropriate logic voltage level.
Operating Ratings(1)
Parameter
Symbol
Min
Typ
Max
Supply Voltages
VDDATX,VDDARX
VDDIO
3.1V
3.1V
3.3V
3.3V
3.5V
3.5V
Ambient Operating
Temperature
TA
0°C
Maximum Junction
Temperature
TJ
Thermal Resistance Junction to
(2)
Ambient
θJA
42.91 °C/W
Thermal Resistance Junction to
(2)
Case
θJC
19.6 °C/W
+70°C
+125°C
Table 22. Operating Ratings
Notes:
1. The device is not guaranteed to function outside its operating rating. Unused inputs must always be tied to an appropriate logic voltage level (Ground
to VDD).
2. No (HS) heat spreader in this package. The θJC/θJA is under air velocity 0 m/s.
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Electrical Characteristics(1)
Parameter
Symbol
Condition
Min
Typ
Max
Supply Current for 100BASE-SX/FX and 100BASE-TX Operation (All Ports@ Full Duplex and 100% Utilization)
100BASE-TX /SX/FX
(analog core + PLL + digital core +
transceiver + digital I/O)
Iddxio
VDDATX, VDDARX, VDDIO = 3.3V
153mA
Supply Current for 10BASE-FL and 10BASE-T Operation (All [email protected] Duplex and 100% Utilization)
10BASE-T/FL
(analog core + PLL + digital core +
transceiver + digital I/O)
Iddxio
VDDATX, VDDARX, VDDIO = 3.3V
97mA
TTL Inputs
Input High Voltage
Vih
Input Low Voltage
V
Input Current
Iin
Vin = GND ~ VDDIO
Output High Voltage
Voh
Ioh = -8 mA
Output Low Voltage
Vol
Iol = 8 mA
Output Tri-state Leakage
|Ioz|
2.0V
0.8V
il
-10µA
10µA
TTL Outputs
2.4V
0.4V
10µA
100Base-TX Transmit (measured differentially after 1:1 transformer)
Peak Differential Output Voltage
Vo
100Ω termination on the differential
output.
Output Voltage Imbalance
Vimb
100Ω termination on the differential
output
Rise/Fall Time
Tr/Tf
Rise/Fall Time Imbalance
+0.95V
+1.05V
2%
3ns
5ns
0ns
0.5ns
Duty Cycle Distortion
+0.25ns
Overshoot
Reference Voltage of ISET
5%
Vset
0.5V
Output Jitter
Peak to peak
0.7ns
1.4ns
10Base-T Transmit (measured differentially after 1:1 transformer)
Peak Differential Output Voltage
Vo
Output Jitter
100Ω termination on the differential
output
2.4V
Peak to peak
1.8ns
3.5ns
60mA
97mA
10Base-FL/100Base-SX Transmit
Transmit ouput current on pin TXM1
IFO (+/- 5%)
VDDATX, VDDARX, VDDIO = 3.3V
40mA
V10FL
RMS
2.5mV
V100SX
RMS
16mV
Vsq
5MHz square wave
10Base-FL Receive on pin RXM1
Signal detect assertion threshold
100Base-SX Receive on pin RXM1
Signal detect assertion threshold
10Base-T Receive
Squelch Threshold
400mV
Note 1: TA = 25°C, specification for packaged product only.
Note 2: Port 2’s transformer consumes an additional 45mA @ 3.3V for 100BASE-TX and 70mA @ 3.3V for 10BASE-T.
Table 23. Electrical Characteristics
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Timing Specifications
Asynchronous Timing without using Address Strobe (ADSN = 0)
t2
valid
Addr, AEN, BExN
ADSN
t3
t4
Read Data
valid
t1
t5
RDN, WRN
t6
Write Data
valid
t7
ARDY
(Read Cycle)
t9
t8
ARDY
( Write Cycle)
t10
Figure 14. Asynchronous Cycle – ADSN = 0
Symbol
Parameter
Min
Typ
Max
Unit
t1
A1-A15, AEN, BExN[3:0] valid to RDN, WRN active
0
ns
t2
A1-A15, AEN, BExN[3:0] hold after RDN inactive
(assume ADSN tied Low)
0
ns
A1-A15, AEN, BExN[3:0] hold after WRN inactive
(assume ADSN tied Low)
1
ns
t3
Read data valid to ARDY rising
t4
Read data to hold RDN inactive
4
ns
t5
Write data setup to WRN inactive
4
ns
t6
Write data hold after WRN inactive
2
t7
Read active to ARDY Low
8
ns
t8
Write inactive to ARDY Low
8
ns
t9
ARDY low (wait time) in read cycle (Note1)
(It is 0ns to read bank select register and 40ns to
read QMU data register in turbo mode) (Note2)
0
40
ns
ARDY low (wait time) in read cycle (Note1)
(It is 0ns to read bank select register and 80ns to
read QMU data register in normal mode)
0
80
ns
ARDY low (wait time) in write cycle (Note1)
(It is 0ns to write bank select register)
(It is 36ns to write QMU data register)
0
50
ns
t10
0.8
ns
ns
Note1: When CPU finished current Read or Write operation, it can do next Read or Write operation even the
ARDY is low. During Read or Write operation if the ADRY is low, the CPU has to keep the RDN/WRN low until the
ARDY returns to high.
Note2: In order to speed up the ARDY low time to 40 ns, user has to use the turbo software driver which is only
supported in the A6 device. Please refer to the “KSZ88xx Programmer's Guide” for detail.
Table 24. Asynchronous Cycle (ADSN = 0) Timing Parameters
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Asynchronous Timing Using Address Strobe (ADSN)
t8
valid
Addr, AEN, BExN
t6
ADSN
Read Data
valid
t1
t4
t3
RDN, WRN
t5
Write Data
valid
t7
ARDY
(Read Cycle)
t2
t10
t9
ARDY
( Write Cycle)
t11
Figure 15. Asynchronous Cycle – Using ADSN
Symbol
Parameter
Min
Typ
Max
t1
A1-A15, AEN, BExN[3:0] valid to RDN, WRN active
t2
Read data valid to ARDY rising
t3
Read data hold to RDN inactive
4
ns
t4
Write data setup to WRN inactive
4
ns
t5
Write data hold after WRN inactive
2
ns
t6
A1-A15, AEN, nBE[3:0] setup to ADSN rising
4
t7
Read active to ARDY Low
t8
A1-A15, AEN, BExN[3:0] hold after ADSN rising
t9
Write inactive to ARDY Low
t10
ARDY low (wait time) in read cycle (Note1)
(It is 0ns to read bank select register and 40ns to
read QMU data register in turbo mode) (Note2)
ARDY low (wait time) in read cycle (Note1)
(It is 0ns to read bank select register and 80ns to
read QMU data register in normal mode)
ARDY low (wait time) in write cycle (Note1)
(It is 0ns to write bank select register)
(It is 36ns to write QMU data register)
t11
0
Unit
ns
0.8
ns
ns
8
2
ns
ns
8
ns
0
40
ns
0
80
ns
0
50
ns
Note1: When CPU finished current Read or Write operation, it can do next Read or Write operation even the
ARDY is low. During Read or Write operation if the ADRY is low, the CPU has to keep the RDN/WRN low until
the ARDY returns to high.
Note2: In order to speed up the ARDY low time to 40 ns, user has to use the turbo software driver which is only
supported in the A6 device. Please refer to the “KSZ88xx Programmer's Guide” for detail.
Table 25. Asynchronous Cycle using ADSN Timing Parameters
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Asynchronous Timing Using DATACSN
t2
DATACSN
Read Data
valid
t1
t5
t4
RDN, WRN
t6
valid
Write Data
t7
ARDY
(Read Cycle)
t3
t9
t8
ARDY
( Write Cycle)
t10
Figure 16. Asynchronous Cycle – Using DATACSN
Symbol
Parameter
Min
Typ
Max
Unit
t1
DATACSN setup to RDN, WRN active
2
ns
t2
DATACSN hold after RDN, WRN inactive (assume
ADSN tied Low)
0
ns
t3
Read data hold to ARDY rising
t4
Read data to RDN hold
4
ns
t5
Write data setup to WRN inactive
4
ns
t6
Write data hold after WRN inactive
2
ns
0.8
ns
t7
Read active to ARDY Low
8
ns
t8
Write inactive to ARDY Low
8
ns
t9
ARDY low (wait time) in read cycle (Note1)
(It is 0ns to read bank select register and 40ns to
read QMU data register in turbo mode) (Note2)
ARDY low (wait time) in read cycle (Note1)
(It is 0ns to read bank select register and 80ns to
read QMU data register in normal mode)
ARDY low (wait time) in write cycle (Note1)
(It is 0ns to write bank select register)
(It is 36ns to write QMU data register)
t10
0
40
ns
0
80
ns
0
50
ns
Note 1: When CPU finished current Read or Write operation, it can do next Read or Write operation even the
ARDY is low. During Read or Write operation if the ADRY is low, the CPU has to keep the RDN/WRN low until
the ARDY returns to high.
Note2: In order to speed up the ARDY low time to 40 ns, user has to use the turbo software driver which is only
supported in the A6 device. Please refer to the “KSZ88xx Programmer's Guide” for detail.
Table 26. Asynchronous Cycle using DATACSN Timing Parameters
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Address Latching Timing for All Modes
t1
ADSN
t2
Address, AEN, BExN
t3
LDEVN
Figure 17. Address Latching Cycle for All Modes
Symbol
Parameter
Min
t1
A1-A15, AEN, BExN[3:0] setup to ADSN
4
t2
A1-A15, AEN, BExN[3:0] hold after ADSN rising
2
t3
A4-A15, AEN to LDEVN delay
Typ
Max
Unit
ns
ns
5
ns
Table 27. Address Latching Timing Parameters
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Synchronous Timing in Burst Write (VLBUSN = 1)
Figure 18. Synchronous Burst Write Cycles – VLBUSN = 1
Symbol
Parameter
Min
Typ
Max
Unit
t1
SWR setup to BCLK falling
4
ns
t2
DATDCSN setup to BCLK rising
4
ns
t3
CYCLEN setup to BCLK rising
4
ns
t4
Write data setup to BCLK rising
6
ns
t5
Write data hold to BCLK rising
2
ns
t6
RDYRTNN setup to BCLK falling
5
ns
t7
RDYRTNN hold to BCLK falling
3
ns
t8
SRDYN setup to BCLK rising
4
ns
t9
SRDYN hold to BCLK rising
3
ns
t10
DATACSN hold to BCLK rising
2
ns
t11
SWR hold to BCLK falling
2
ns
t12
CYCLEN hold to BCLK rising
2
ns
Table 28. Synchronous Burst Write Timing Parameters
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Synchronous Timing in Burst Read (VLBUSN = 1)
BCLK
t10
t2
DATACSN
t11
t1
SWR
t12
t3
CYCLEN
t5
t4
data0
Read Data
data1
data2
data3
t7
t6
RDYRTNN
t8
t9
SRDYN
Figure 19. Synchronous Burst Read Cycles – VLBUSN = 1
Symbol
Parameter
Min
Typ
Max
Unit
t1
SWR setup to BCLK falling
4
ns
t2
DATDCSN setup to BCLK rising
4
ns
t3
CYCLEN setup to BCLK rising
4
ns
t4
Read data setup to BCLK rising
6
ns
t5
Read data hold to BCLK rising
2
ns
t6
RDYRTNN setup to BCLK falling
5
ns
t7
RDYRTNN hold to BCLK falling
3
ns
t8
SRDYN setup to BCLK rising
4
ns
t9
SRDYN hold to BCLK rising
3
ns
t10
DATACSN hold to BCLK rising
2
ns
t11
SWR hold to BCLK falling
2
ns
t12
CYCLEN hold to BCLK rising
2
ns
Table 29. Synchronous Burst Read Timing Parameters
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Synchronous Write Timing (VLBUSN = 0)
BCLK
t2
Address, AEN, BExN
valid
t1
ADSN
t5
t6
SWR
t4
t3
CYCLEN
t7
Write Data
t8
valid
t9
t10
SRDYN
t11
t12
RDYRTNN
Figure 20. Synchronous Write Cycle – VLBUSN = 0
Symbol
Parameter
Min
Typ
Max
Unit
t1
A1-A15, AEN, BExN[3:0] setup to ADSN rising
4
ns
t2
A1-A15, AEN, BExN[3:0] hold after ADSN rising
2
ns
t3
CYCLEN setup to BCLK rising
4
ns
t4
CYCLEN hold after BCLK rising (non-burst mode)
2
ns
t5
SWR setup to BCLK
4
ns
t6
SWR hold after BCLK rising with SRDYN active
0
ns
t7
Write data setup to BCLK rising
5
ns
t8
Write data hold from BCLK rising
1
ns
t9
SRDYN setup to BCLK
8
ns
t10
SRDYN hold to BCLK
1
ns
t11
RDYRTNN setup to BCLK
4
ns
t12
RDYRTNN hold to BCLK
1
ns
Table 30. Synchronous Write (VLBUSN = 0) Timing Parameters
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Synchronous Read Timing (VLBUSN = 0)
BCLK
t2
Address, AEN, BExN
valid
t1
ADSN
t5
SWR
t4
t3
CYCLEN
t7
Read Data
t6
valid
t8
t9
SRDYN
t10
t11
RDYRTNN
Figure 21. Synchronous Read Cycle – VLBUSN = 0
Symbol
Parameter
Min
Typ
Max
Unit
t1
A1-A15, AEN, BExN[3:0] setup to ADSN rising
4
ns
t2
A1-A15, AEN, BExN[3:0] hold after ADSN rising
2
ns
t3
CYCLEN setup to BCLK rising
4
ns
t4
CYCLEN hold after BCLK rising (non-burst mode)
2
ns
t5
SWR setup to BCLK
4
ns
t6
Read data hold from BCLK rising
1
ns
t7
Read data setup to BCLK
8
ns
t8
SRDYN setup to BCLK
8
ns
t9
SRDYN hold to BCLK
1
ns
t10
RDYRTNN setup to BCLK rising
4
ns
t11
RDYRTNN hold after BCLK rising
1
ns
Table 31. Synchronous Read (VLBUSN = 0) Timing Parameters
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EEPROM Timing
EECS
*1
EESK
1
tcyc
EEDO
11
0
An
A0
ts
th
EEDI
High-Z
D15
D14
D1
D13
D0
*1 Start bit
Figure 22. EEPROM Read Cycle Timing Diagram
Timing
Parameter
Description
Min
Typ
tcyc
Clock cycle
ts
Setup time
20
ns
th
Hold time
20
ns
4 (OBCR[1:0]=11 on-chip
bus speed @ 25 MHz)
or
0.8 (OBCR[1:0]=00 on-chip
bus speed @ 125 MHz)
Max
Unit
μs
Table 32. EEPROM Timing Parameters
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Auto Negotiation Timing
Figure 23. Auto-Negotiation Timing
Timing
Parameter
Description
Min
Typ
Max
Unit
tBTB
FLP burst to FLP
burst
8
16
24
ms
tFLPW
FLP burst width
tPW
Clock/Data pulse
width
tCTD
Clock pulse to
data pulse
55.5
64
69.5
µs
tCTC
Clock pulse to
clock pulse
111
128
139
µs
Number of
Clock/Data
pulses per burst
17
2
ms
100
ns
33
Table 33. Auto Negotiation Timing Parameters
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Reset Timing
As long as the stable supply voltages to reset High timing (minimum of 10ms) are met, there is no power-sequencing
requirement for the KSZ8862M supply voltage (3.3V).
The reset timing requirement is summarized in the Figure 26 and Table 34.
Figure 24. Reset Timing
Symbol
Parameter
Min
tsr
Stable supply voltages to reset High
10
Max
Unit
ms
Table 34. Reset Timing Parameters
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Selection of Isolation Transformers
A 1:1 isolation transformer is required at the line interface. An isolation transformer with integrated common-mode choke
is recommended to exceed FCC requirements.
Table 35 gives recommended transformer characteristics.
Parameter
Value
Test Condition
Turns ratio
1 CT : 1 CT
Open-circuit inductance (min)
350μH
100mV, 100kHz, 8mA
Leakage inductance (max)
0.4μH
1MHz (min)
Inter-winding capacitance (max)
12pF
D.C. resistance (max)
0.9Ω
Insertion loss (max)
1.0dB
HIPOT (min)
1500Vrms
0MHz – 65MHz
Table 35. Transformer Selection Criteria
Magnetic Manufacturer
Part Number
Auto MDI-X
Number of Port
Pulse
H1102
Yes
1
Pulse (low cost)
H1260
Yes
1
Transpower
HB726
Yes
1
Bel Fuse
S558-5999-U7
Yes
1
Delta
LF8505
Yes
1
LanKom
LF-H41S
Yes
1
Table 36. Qualified Single Port Magnetic
Selection of Reference Crystal
Chacteristics
Value
Units
Frequency
25
MHz
Frequency tolerance (max)
±50
ppm
Load capacitance (max)
20
pF
Series resistance
25
Ω
Table 37. Typical Reference Crystal Characteristics
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Package Information
Figure 25. 128-Pin PQFP Package
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Acronyms and Glossary
BIU
Bus Interface Unit
BPDU Bridge Protocol Data Unit
CMOS
CRC Cyclic Redundancy Check
The host interface function that performs code conversion, buffering,
and the like required for communications to and from a network.
A packet containing ports, addresses, etc. to make sure data being
passed through a bridged network arrives at its proper destination.
Complementary Metal Oxide Semiconductor A common semiconductor
manufacturing technique in which positive and negative types of
transistors are combined to form a current gate that in turn forms an
effective means of controlling electrical current through a chip.
A common technique for detecting data transmission errors. CRC for
Ethernet is 32 bits long.
Cut-through switch
A switch typically processes received packets by reading in the full
packet (storing), then processing the packet to determine where it
needs to go, then forwarding it. A cut-through switch simply reads in the
first bit of an incoming packet and forwards the packet. Cut-through
switches do not store the packet.
DA
The address to send packets.
Destination Address
DMA Direct Memory Access
A design in which memory on a chip is controlled independently of the
CPU.
EEPROM Electronically Erasable Programmable Read-only Memory
A design in which memory on a chip can be erased by exposing it to an
electrical charge.
EISA Extended Industry Standard Architecture
A bus architecture designed for PCs using 80x86 processors, or an Intel
80386, 80486 or Pentium microprocessor. EISA buses are 32 bits wide
and support multiprocessing.
A naturally occurring phenomena when the electromagnetic field of one
device disrupts, impedes or degrades the electromagnetic field of
another device by coming into proximity with it. In computer technology,
computer devices are susceptible to EMI because electromagnetic
fields are a byproduct of passing electricity through a wire. Data lines
that have not been properly shielded are susceptible to data corruption
by EMI.
EMI
Electro-Magnetic Interference
FCS
FID
IGMP
IPG
Frame Check Sequence
Frame or Filter ID
Internet Group Management Protocol
Inter-Packet Gap
See CRC.
Specifies the frame identifier. Alternately is the filter identifier.
The protocol defined by RFC 1112 for IP multicast transmissions.
A time delay between successive data packets mandated by the
network standard for protocol reasons. In Ethernet, the medium has to
be "silent" (i.e., no data transfer) for a short period of time before a node
can consider the network idle and start to transmit. IPG is used to
correct timing differences between a transmitter and receiver. During
the IPG, no data is transferred, and information in the gap can be
discarded or additions inserted without impact on data integrity.
ISI
Inter-Symbol Interference
The disruption of transmitted code caused by adjacent pulses
affecting or interfering with each other.
ISA Industry Standard Architecture
Jumbo Packet
MDI
Medium Dependent Interface
August 2010
A bus architecture used in the IBM PC/XT and PC/AT.
A packet larger than the standard Ethernet packet (1500 bytes). Large
packet sizes allow for more efficient use of bandwidth, lower overhead,
less processing, etc.
An Ethernet port connection that allows network hubs or switches to
connect to other hubs or switches without a null-modem, or crossover,
cable. MDI provides the standard interface to a particular media (copper
or fiber) and is therefore 'media dependent.'
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MDI-X Medium Dependent Interface Crossover
MIB
Management Information Base
MII
Media Independent Interface
NIC
Network Interface Card
NPVID Non Port VLAN ID
PLL
Phase-Locked Loop
PME Power Management Event
QMU Queue Management Unit
SA
Source Address
TDR Time Domain Reflectometry
UTP
Unshielded Twisted Pair
VLAN Virtual Local Area Network
An Ethernet port connection that allows networked end stations (i.e.,
PCs or workstations) to connect to each other using a null-modem, or
crossover, cable. For 10/100 full-duplex networks, an end point (such as
a computer) and a switch are wired so that each transmitter connects to
the far end receiver. When connecting two computers together, a cable
that crosses the TX and RX is required to do this. With auto MDI-X, the
PHY senses the correct TX and RX roles, eliminating any cable
confusion.
The MIB comprises the management portion of network devices. This
can include things like monitoring traffic levels and faults (statistical),
and can also change operating parameters in network nodes (static
forwarding addresses).
The MII accesses PHY registers as defined in the IEEE 802.3
specification.
An expansion board inserted into a computer to allow it to be connected
to a network. Most NICs are designed for a particular type of network,
protocol, and media, although some can serve multiple networks.
The Port VLAN ID value is used as a VLAN reference.
An electronic circuit that controls an oscillator so that it maintains a
constant phase angle (i.e., lock) on the frequency of an input, or
reference, signal. A PLL ensures that a communication signal is locked
on a specific frequency and can also be used to generate, modulate,
and demodulate a signal and divide a frequency.
An occurrence that affects the directing of power to different
components of a system.
Manages packet traffic between MAC/PHY interface and the system
host. The QMU has built-in packet memories for receive and transmit
functions called TXQ (Transmit Queue) and RXQ (Receive Queue).
The address from which information has been sent.
TDR is used to pinpoint flaws and problems in underground and aerial
wire, cabling, and fiber optics. They send a signal down the conductor
and measure the time it takes for the signal -- or part of the signal -- to
return.
Commonly a cable containing 4 twisted pairs of wires. The wires are
twisted in such a manner as to cancel electrical interference generated
in each wire, therefore shielding is not required.
A configuration of computers that acts as if all computers are connected
by the same physical network but which may be located virtually
anywhere.
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use.
Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into
the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s
use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
© 2006 Micrel, Incorporated.
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