KSZ8864RMN
Integrated 4-Port 10/100 Managed Switch
with Two MACs MII or RMII Interfaces
Rev. 1.4
General Description
The KSZ8864RMN is a highly-integrated, Layer 2
managed 4-port switch with optimized design, plentiful
features and smallest package size. It is designed for
cost-sensitive 10/100Mbps 4-port switch systems with
on-chip termination, lowest-power consumption, and
small package to save system cost. It has 1.4Gbps highperformance memory bandwidth, shared memory-based
switch fabric with full non-blocking configuration. It also
provides an extensive feature set such as the power
management, programmable rate limiting and priority
ratio, tag/port-based VLAN, packet filtering, quality of
service (QoS), four queue prioritization, management
interface, MIB counters. Port 3 and Port 4 support either
MII or RMII interfaces with SW3-MII/RMII and SW4MII/RMII (see Functional Diagram) for KSZ8864RMN
data interface.
The KSZ8864RMN provides multiple CPU control/data
interfaces to effectively address both current and
emerging fast Ethernet applications.
The KSZ8864RMN consists of 10/100 fast Ethernet
PHYs with patented and enhanced mixed-signal
technology, media access control (MAC) units, a highspeed non-blocking switch fabric, a dedicated address
lookup engine, and an on-chip frame buffer memory.
The KSZ8864RMN contains four MACs and two PHYs.
The two PHYs support the 10/100Base-T/TX.
All registers of MACs and PHYs units can be managed
by the control interface of SPI or the SMI. MIIM registers
of the PHYs can be accessed through the MDC/MDIO
interface. EEPROM can set all control registers by I2C
controller interface for the unmanaged mode.
Functional Diagram
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
September 2011
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Micrel, Inc.
KSZ8864RMN
Integrated 4-Port 10/100 Ethernet Switch
Features
Advanced Switch Features
New generation switch with five MACs and five
PHYs that are fully compliant with the IEEE 802.3u
standard.
Non-blocking switch fabric assures fast packet
delivery by utilizing an 1K MAC address lookup table
and a store-and-forward architecture.
IEEE 802.1q VLAN support for up to 128 VLAN
groups (full-range 4096 of VLAN IDs).
Static MAC table supports up to 32 entries.
VLAN ID tag/untag options, per port basis.
IEEE 802.1p/q tag insertion or removal on a per port
basis based on ingress port (egress).
On-chip 64Kbyte memory for frame buffering (not
shared with 1K unicast address table).
Programmable rate limiting at the ingress and egress
on a per port basis.
Full-duplex IEEE 802.3x flow control (PAUSE) with
force mode option.
Jitter-free per packet based rate limiting support.
Half-duplex back pressure flow control.
Broadcast storm protection with percentage control
(global and per port basis).
HP Auto MDI/MDI-X and IEEE Auto crossover
support.
IEEE 802.1d rapid spanning tree protocol RSTP
support.
MII interface of MAC supports both MAC mode and
PHY mode.
Tail tag mode (1 byte added before FCS) support at
Port 4 to inform the processor which ingress port
receives the packet.
Per port LED Indicators for link, activity, and 10/100
speed.
1.4Gbps high-performance memory bandwidth and
shared memory based switch fabric with fully nonblocking configuration.
Register port status support for link, activity, full/half
duplex and 10/100 speed.
On-chip terminations and internal biasing technology
for cost down and lowest power consumption.
Dual MII/RMII with MAC 3 SW3-MII/RMII and MAC 4
SW4-MII/RMII interfaces.
Enable/Disable option for huge frame size up to
2000 Bytes per frame.
IGMP v1/v2 snooping (Ipv4) support for multicast
packet filtering.
IPv4/IPv6 QoS support.
Support unknown unicast/multicast address and
unknown VID packet filtering.
Switch Monitoring Features
Port mirroring/monitoring/sniffing: ingress
egress traffic to any port or MII/RMII.
MIB counters for fully-compliant statistics gathering
34 MIB counters per port.
Loop-back support for MAC, PHY and remote
diagnostic of failure.
and/or
Interrupt for the link change on any ports.
Low-Power Dissipation:
Self-address filtering.
Comprehensive Configuration Register Access
Serial management interface (MDC/MDIO) to all
PHYs registers and SMI interface (MDC/MDIO) to all
registers.
Full-chip hardware power-down.
Full-chip software power-down and per port software
power down.
Energy-detect mode support <0.1W full-chip power
consumption when all ports have no activity.
High-speed SPI (up to 25MHz) and I2C master
Interface to all internal registers.
I/0 pins strapping and EEPROM to program selective
registers in unmanaged switch mode.
Very-low full-chip power consumption (<0.3W),
without extra power consumption on transformers.
Dynamic clock tree shutdown feature.
Voltages:
Control registers configurable on the fly (port-priority,
802.1p/d/q, AN…).
Analog VDDAT 3.3V only.
QoS/CoS Packet Prioritization Support
VDDIO support 3.3V, 2.5V and 1.8V.
Per port, 802.1p and DiffServ-based.
Low 1.2V core power.
1/2/4-queue QoS prioritization selection.
0.13um CMOS technology.
Programmable weighted fair queuing for ratio
control.
Industrial Temperature Range: –40°C to +85°C.
Re-mapping of 802.1p priority field per port basis.
Available in 64-pin QFN, lead-free small package.
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Commercial temperature range: 0°C to +70°C.
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KSZ8864RMN
Applications
Typical
VoIP Phone
Set-top/Game Box
Automotive
Industrial Control
IPTV POF
SOHO Residential Gateway
Broadband Gateway / Firewall / VPN
Integrated DSL/Cable Modem
Wireless LAN access point + gateway
Standalone 10/100 switch
Ordering Information
Part Number
Temperature Range
Package
Lead Finish/Grade
KSZ8864RMN
0°C to 70°C
64-Pin QFN
Pb-Free/Commercial
KSZ8864RMNI
40°C to 85°C
64-Pin QFN
Pb-Free/Industrial
Revision History
Revision
Date
Description
1.0
10/29/10
Intiial document created.
1.1
12/16/10
Correct typo issue and others.
1.2
01/20/11
Update ordering information and junction thermal data.
1.3
03/18/11
Update the registers numbers, descriptions and typo error.
1.4
07/28/11
Update some descriptions of MDC/MDIO SMI mode and IGMP, update
the port register status 2 default value from 0x00 to 0x01 and a test
register 191 default value from 0x00 to 0x80. Remove the note for
ordering information table.
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Contents
Pin Configuration ..........................................................................................................................................................13
Pin Description ..............................................................................................................................................................14
Pin for Strap-in Options................................................................................................................................................19
Introduction ...................................................................................................................................................................22
Functional Overview: Physical Layer Transceiver ....................................................................................................22
100BASE-TX Transmit ...............................................................................................................................................22
100BASE-TX Receive ................................................................................................................................................22
PLL Clock Synthesizer................................................................................................................................................22
Scrambler/De-Scrambler (100BASE-TX only)............................................................................................................23
10BASE-T Transmit ....................................................................................................................................................23
10BASE-T Receive .....................................................................................................................................................23
MDI/MDI-X Auto Crossover ........................................................................................................................................23
Straight Cable .........................................................................................................................................................24
Crossover Cable .....................................................................................................................................................25
Auto-Negotiation .........................................................................................................................................................25
On-Chip Termination Resistors ..................................................................................................................................27
Functional Overview: Power Management.................................................................................................................27
Normal Operation Mode .............................................................................................................................................27
Energy Detect Mode ...................................................................................................................................................27
Soft Power-Down Mode..............................................................................................................................................28
Power Saving Mode....................................................................................................................................................28
Port-Based Power-Down Mode ..................................................................................................................................28
Functional Overview: Switch Core ..............................................................................................................................28
Address Look-Up ........................................................................................................................................................28
Learning ......................................................................................................................................................................28
Migration .....................................................................................................................................................................28
Aging...........................................................................................................................................................................29
Forwarding ..................................................................................................................................................................29
Switching Engine ........................................................................................................................................................29
Media Access Controller (MAC) Operation ................................................................................................................29
Inter-Packet Gap (IPG) ...............................................................................................................................................29
Backoff Algorithm........................................................................................................................................................29
Late Collision ..............................................................................................................................................................29
Illegal Frames .............................................................................................................................................................29
Flow Control................................................................................................................................................................29
Half-Duplex Back Pressure.........................................................................................................................................32
Broadcast Storm Protection........................................................................................................................................32
MII Interface Operation ...............................................................................................................................................32
Switch MAC3/MAC4 SW3/SW4-MII Interface ............................................................................................................33
Switch MAC3/MAC4 SW3/SW4-RMII Interface..........................................................................................................34
Advanced Functionality................................................................................................................................................36
QoS Priority Support...................................................................................................................................................36
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Port-Based Priority..................................................................................................................................................36
802.1p-Based Priority .............................................................................................................................................36
DiffServ-Based Priority ...........................................................................................................................................37
Spanning Tree Support...............................................................................................................................................37
Rapid Spanning Tree Support ....................................................................................................................................38
Tail Tagging Mode ......................................................................................................................................................39
IGMP Support .............................................................................................................................................................40
Port Mirroring Support ................................................................................................................................................40
VLAN Support .............................................................................................................................................................40
Rate Limiting Support .................................................................................................................................................41
Ingress Rate Limit...................................................................................................................................................41
Egress Rate Limit ...................................................................................................................................................42
Transmit Queue Ratio Programming......................................................................................................................42
Filtering for Self-Address, Unknown Unicast/Multicast Address and Unknown VID Packet/IP Multicast ..................42
Configuration Interface ...............................................................................................................................................42
I2C Master Serial Bus Configuration.......................................................................................................................42
SPI Slave Serial Bus Configuration ........................................................................................................................43
MII Management Interface (MIIM) ..............................................................................................................................46
Serial Management Interface (SMI)............................................................................................................................46
Register Description .....................................................................................................................................................48
Global Registers .........................................................................................................................................................50
Register 0 (0x00): Chip ID0 ....................................................................................................................................50
Register 1 (0x01): Revision ID / Start Switch .........................................................................................................50
Register 2 (0x02): Global Control 0 ........................................................................................................................50
Register 3 (0x03): Global Control 1 ........................................................................................................................51
Register 4 (0x04): Global Control 2 ........................................................................................................................52
Register 5 (0x05): Global Control 3 ........................................................................................................................53
Register 6 (0x06): Global Control 4 ........................................................................................................................54
Register 7 (0x07): Global Control 5 ........................................................................................................................55
Register 8 (0x08): Global Control 6 ........................................................................................................................55
Register 9 (0x09): Global Control 7 ........................................................................................................................55
Register 10 (0x0A): Global Control 8......................................................................................................................56
Register 11 (0x0B): Global Control 9......................................................................................................................56
Register 12 (0x0C): Global Control 10 ...................................................................................................................57
Register 13 (0x0D): Global Control 11 ...................................................................................................................57
Register 14 (0x0E): Power Down Management Control 1 .....................................................................................57
Register 15 (0x0F): Power Down Management Control 2......................................................................................58
Port Registers .............................................................................................................................................................59
Register 16 (0x10): Reserved.................................................................................................................................59
Register 32 (0x20): Port 1 Control 0.......................................................................................................................59
Register 48 (0x30): Port 2 Control 0.......................................................................................................................59
Register 64 (0x40): Port 3 Control 0.......................................................................................................................59
Register 80 (0x50): Port 4 Control 0.......................................................................................................................59
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Register 17 (0x11): Reserved.................................................................................................................................60
Register 33 (0x21): Port 1 Control 1.......................................................................................................................60
Register 49 (0x31): Port 2 Control 1.......................................................................................................................60
Register 65 (0x41): Port 3 Control 1.......................................................................................................................60
Register 81 (0x51): Port 4 Control 1.......................................................................................................................60
Register 18 (0x12): Reserved.................................................................................................................................61
Register 34 (0x22): Port 1 Control 2.......................................................................................................................61
Register 50 (0x32): Port 2 Control 2.......................................................................................................................61
Register 66 (0x42): Port 3 Control 2.......................................................................................................................61
Register 82 (0x52): Port 4 Control 2.......................................................................................................................61
Register 19 (0x13): Reserved.................................................................................................................................62
Register 35 (0x23): Port 1 Control 3.......................................................................................................................62
Register 51 (0x33): Port 2 Control 3.......................................................................................................................62
Register 67 (0x43): Port 3 Control 3.......................................................................................................................62
Register 83 (0x53): Port 4 Control 3.......................................................................................................................62
Register 20 (0x14): Reserved.................................................................................................................................62
Register 36 (0x24): Port 1 Control 4.......................................................................................................................62
Register 52 (0x34): Port 2 Control 4.......................................................................................................................62
Register 68 (0x44): Port 3 Control 4.......................................................................................................................62
Register 84 (0x54): Port 4 Control 4.......................................................................................................................62
Register 87 (0x57): RMII Management Control Register .......................................................................................63
Register 25 (0x19): Reserved.................................................................................................................................63
Register 41 (0x29): Port 1 Status 0 ........................................................................................................................63
Register 57 (0x39): Port 2 Status 0 ........................................................................................................................63
Register 73 (0x49): Port 3 Status 0 for SPD/DPX ..................................................................................................63
Register 89 (0x59): Port 4 Status 0 for SPD/DPX ..................................................................................................63
Register 26 (0x1A): Reserved ................................................................................................................................64
Register 42 (0x2A): Port 1 PHY Special Control/Status.........................................................................................64
Register 58 (0x3A): Port 2 PHY Special Control/Status.........................................................................................64
Register 74 (0x4A): Reserved ................................................................................................................................64
Register 90 (0x5A): Reserved ................................................................................................................................64
Register 27 (0x1B): Reserved ................................................................................................................................64
Register 43 (0x2B): Reserved ................................................................................................................................64
Register 59 (0x3B): Reserved ................................................................................................................................64
Register 75 (0x4B): Reserved ................................................................................................................................64
Register 91 (0x5B): Reserved ................................................................................................................................64
Register 28 (0x1C): Reserved ................................................................................................................................65
Register 44 (0x2C): Port 1 Control 5 ......................................................................................................................65
Register 60 (0x3C): Port 2 Control 5 ......................................................................................................................65
Register 76 (0x4C): Reserved ................................................................................................................................65
Register 92 (0x5C): Reserved ................................................................................................................................65
Register 29 (0x1D): Reserved ................................................................................................................................66
Register 45 (0x2D): Port 1 Control 6 ......................................................................................................................66
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Register 61 (0x3D): Port 2 Control 6 ......................................................................................................................66
Register 77 (0x4D): Port 3 Control 6 for MAC Loop-back ......................................................................................66
Register 93 (0x5D): Port 4 Control 6 for MAC Loop-back ......................................................................................66
Register 30 (0x1E): Reserved ................................................................................................................................67
Register 46 (0x2E): Port 1 Status 1........................................................................................................................67
Register 62 (0x3E): Port 2 Status 1........................................................................................................................67
Register 78 (0x4E): Reserved ................................................................................................................................67
Register 94 (0x5E): Reserved ................................................................................................................................67
Register 31 (0x1F): Reserved ................................................................................................................................67
Register 47 (0x2F): Port 1 Control 7 and Status 2 .................................................................................................67
Register 63 (0x3F): Port 2 Control 7 and Status 2 .................................................................................................67
Register 79 (0x4F): Reserved ................................................................................................................................67
Register 95 (0x5F): Reserved ................................................................................................................................67
Advanced Control Registers .......................................................................................................................................69
Register 104 (0x68): MAC Address Register 0 ......................................................................................................69
Register 105 (0x69): MAC Address Register 1 ......................................................................................................69
Register 106 (0x6A): MAC Address Register 2......................................................................................................69
Register 107 (0x6B): MAC Address Register 3......................................................................................................69
Register 108 (0x6C): MAC Address Register 4......................................................................................................69
Register 109 (0X6D): MAC Address Register 5 .....................................................................................................69
Register 110 (0x6E): Indirect Access Control 0 .....................................................................................................69
Register 111 (0x6F): Indirect Access Control 1......................................................................................................69
Register 112 (0x70): Indirect Data Register 8 ........................................................................................................69
Register 113 (0x71): Indirect Data Register 7 ........................................................................................................69
Register 114 (0x72): Indirect Data Register 6 ........................................................................................................69
Register 115 (0x73): Indirect Data Register 5 ........................................................................................................70
Register 116 (0x74): Indirect Data Register 4 ........................................................................................................70
Register 117 (0x75): Indirect Data Register 3 ........................................................................................................70
Register 118 (0x76): Indirect Data Register 2 ........................................................................................................70
Register 119 (0x77): Indirect Data Register 1 ........................................................................................................70
Register 120 (0x78): Indirect Data Register 0 ........................................................................................................70
Register 124 (0x7C): Interrupt Status Register ......................................................................................................70
Register 125 (0x7D): Interrupt Mask Register........................................................................................................70
Register 128 (0x80): Global Control 12 ..................................................................................................................71
Register 129 (0x81): Global Control 13 ..................................................................................................................71
Register 130 (0x82): Global Control 14 ..................................................................................................................71
Register 131 (0x83): Global Control 15 ..................................................................................................................72
Register 132 (0x84): Global Control 16 ..................................................................................................................72
Register 133(0x85): Global Control 17 ...................................................................................................................72
Register 134 (0x86): Global Control 18 ..................................................................................................................73
Register 135 (0x87): Global Control 19 ..................................................................................................................73
Register 144 (0x90): TOS Priority Control Register 0 ............................................................................................73
Register 145 (0x91): TOS Priority Control Register 1 ............................................................................................74
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Register 146 (0x92): TOS Priority Control Register 2 ............................................................................................74
Register 147 (0x93): TOS Priority Control Register 3 ............................................................................................74
Register 148 (0x94): TOS Priority Control Register 4 ............................................................................................74
Register 149 (0x95): TOS Priority Control Register 5 ............................................................................................74
Register 150 (0x96): TOS Priority Control Register 6 ............................................................................................75
Register 151 (0x97): TOS Priority Control Register 7 ............................................................................................75
Register 152 (0x98): TOS Priority Control Register 8 ............................................................................................75
Register 153 (0x99): TOS Priority Control Register 9 ............................................................................................75
Register 154 (0x9A): TOS Priority Control Register 10..........................................................................................75
Register 155 (0x9B): TOS Priority Control Register 11..........................................................................................75
Register 156 (0x9C): TOS Priority Control Register 12..........................................................................................75
Register 157 (0x9D): TOS Priority Control Register 13..........................................................................................76
Register 158 (0x9E): TOS Priority Control Register 14..........................................................................................76
Register 159 (0x9F): TOS Priority Control Register 15 ..........................................................................................76
Register 176 (0xB0): Reserved ..............................................................................................................................76
Register 192 (0xC0): Port 1 Control 8 ....................................................................................................................76
Register 208 (0xD0): Port 2 Control 8 ....................................................................................................................76
Register 224 (0xE0): Port 3 Control 8 ....................................................................................................................76
Register 240 (0xF0): Port 4 Control 8.....................................................................................................................76
Register 177 (0xB1): Reserved ..............................................................................................................................77
Register 193 (0xC1): Port 1 Control 9 ....................................................................................................................77
Register 209 (0xD1): Port 2 Control 9 ....................................................................................................................77
Register 225 (0xE1): Port 3 Control 9 ....................................................................................................................77
Register 241 (0xF1): Port 4 Control 9.....................................................................................................................77
Register 178 (0xB2): Reserved ..............................................................................................................................77
Register 194 (0xC2): Port 1 Control 10 ..................................................................................................................77
Register 210 (0xD2): Port 2 Control 10 ..................................................................................................................77
Register 226 (0xE2): Port 3 Control 10 ..................................................................................................................77
Register 242 (0xF2): Port 4 Control 10...................................................................................................................77
Register 179 (0xB3): Reserved ..............................................................................................................................78
Register 195 (0xC3): Port 1 Control 11 ..................................................................................................................78
Register 211 (0xD3): Port 2 Control 11 ..................................................................................................................78
Register 227 (0xE3): Port 3 Control 11 ..................................................................................................................78
Register 243 (0xF3): Port 4 Control 11...................................................................................................................78
Register 180 (0xB4): Reserved ..............................................................................................................................78
Register 196 (0xC4): Port 1 Control 12 ..................................................................................................................78
Register 212 (0xD4): Port 2 Control 12 ..................................................................................................................78
Register 228 (0xE4): Port 3 Control 12 ..................................................................................................................78
Register 244 (0xF4): Port 4 Control 12...................................................................................................................78
Register 181 (0xB5): Reserved ..............................................................................................................................78
Register 197 (0xC5): Port 1 Control 13 ..................................................................................................................78
Register 213 (0xD5): Port 2 Control 13 ..................................................................................................................78
Register 229 (0xE5): Port 3 Control 13 ..................................................................................................................78
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Register 245 (0xF5): Port 4 Control 13...................................................................................................................78
Register 182 (0xB6): Reserved ..............................................................................................................................79
Register 198 (0xC6): Port 1 Rate Limit Control......................................................................................................79
Register 214 (0xD6): Port 2 Rate Limit Control......................................................................................................79
Register 230 (0xE6): Port 3 Rate Limit Control ......................................................................................................79
Register 246 (0xF6): Port 4 Rate Limit Control ......................................................................................................79
Register 183 (0xB7): Reserved ..............................................................................................................................79
Register 199 (0xC7): Port 1 Priority 0 Ingress Limit Control 1 ...............................................................................79
Register 215 (0xD7): Port 2 Priority 0 Ingress Limit Control 1 ...............................................................................79
Register 231 (0xE7): Port 3 Priority 0 Ingress Limit Control 1................................................................................79
Register 247 (0xF7): Port 4 Priority 0 Ingress Limit Control 1................................................................................79
Register 184 (0xB8): Reserved ..............................................................................................................................80
Register 200 (0xC8): Port 1 Priority 1 Ingress Limit Control 2 ...............................................................................80
Register 216 (0xD8): Port 2 Priority 1 Ingress Limit Control 2 ...............................................................................80
Register 232 (0xE8): Port 3 Priority 1 Ingress Limit Control 2................................................................................80
Register 248 (0xF8): Port 4 Priority 1 Ingress Limit Control 2................................................................................80
Register 185 (0xB9): Reserved ..............................................................................................................................80
Register 201 (0xC9): Port 1 Priority 2 Ingress Limit Control 3 ...............................................................................80
Register 217 (0xD9): Port 2 Priority 2 Ingress Limit Control 3 ...............................................................................80
Register 233 (0xE9): Port 3 Priority 2 Ingress Limit Control 3................................................................................80
Register 249 (0xF9): Port 4 Priority 2 Ingress Limit Control 3................................................................................80
Register 186 (0xBA): Reserved..............................................................................................................................80
Register 202 (0xCA): Port 1 Priority 3 Ingress Limit Control 4 ...............................................................................80
Register 218 (0xDA): Port 2 Priority 3 Ingress Limit Control 4 ...............................................................................80
Register 234 (0xEA): Port 3 Priority 3 Ingress Limit Control 4 ...............................................................................80
Register 250 (0xFA): Port 4 Priority 3 Ingress Limit Control 4 ...............................................................................80
Register 187 (0xBB): Reserved..............................................................................................................................81
Register 203 (0xCB): Port 1 Queue 0 Egress Limit Control 1 ................................................................................81
Register 219 (0xDB): Port 2 Queue 0 Egress Limit Control 1 ................................................................................81
Register 235 (0xEB): Port 3 Queue 0 Egress Limit Control 1 ................................................................................81
Register 251 (0xFB): Port 4 Queue 0 Egress Limit Control 1 ................................................................................81
Register 188 (0xBC): Reserved..............................................................................................................................81
Register 204 (0xCC): Port 1 Queue 1 Egress Limit Control 2................................................................................81
Register 220 (0xDC): Port 2 Queue 1 Egress Limit Control 2................................................................................81
Register 236 (0xEC): Port 3 Queue 1 Egress Limit Control 2 ................................................................................81
Register 252 (0xFC): Port 4 Queue 1 Egress Limit Control 2 ................................................................................81
Register 189 (0xBD): Reserved..............................................................................................................................81
Register 205 (0xCD): Port 1 Queue 2 Egress Limit Control 3................................................................................81
Register 221 (0xDD): Port 2 Queue 2 Egress Limit Control 3................................................................................81
Register 237 (0xED): Port 3 Queue 2 Egress Limit Control 3 ................................................................................81
Register 253 (0xFD): Port 4 Queue 2 Egress Limit Control 3 ................................................................................81
Register 190 (0xBE): Reserved..............................................................................................................................82
Register 206 (0xCE): Port 1 Queue 3 Egress Limit Control 4 ................................................................................82
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Register 222 (0xDE): Port 2 Queue 3 Egress Limit Control 4 ................................................................................82
Register 238 (0xEE): Port 3 Queue 3 Egress Limit Control 4 ................................................................................82
Register 254 (0xFE): Port 4 Queue 3 Egress Limit Control 4 and Chip ID ............................................................82
Data Rate Selection Table in 100BT ..........................................................................................................................82
Data Rate Selection Table in 10BT ............................................................................................................................83
Register 191(0xBF): Testing Register ....................................................................................................................83
Register 207(0xCF): Port3 Control Register 1 ......................................................................................................83
Register 223(0xDF): Port3 Control Register 2 .......................................................................................................84
Register 239(0xEF): Test Register 3 ......................................................................................................................84
Register 255(0xFF): Testing and Port 4 Control Register ......................................................................................84
Static MAC Address Table ...........................................................................................................................................85
VLAN Table ....................................................................................................................................................................88
Dynamic MAC Address Table ......................................................................................................................................90
MIB (Management Information Base) Counters.........................................................................................................92
MIIM Registers ...............................................................................................................................................................95
Register 0h: MII Control..............................................................................................................................................95
Register 1h: MII Status ...............................................................................................................................................96
Register 2h: PHYID HIGH ..........................................................................................................................................96
Register 3h: PHYID LOW ...........................................................................................................................................96
Register 4h: Advertisement Ability..............................................................................................................................96
Register 5h: Link Partner Ability .................................................................................................................................97
Register 1dh: Reserved .............................................................................................................................................97
Register 1fh: PHY Special Control/Status ..................................................................................................................98
Absolute Maximum Ratings(1) ......................................................................................................................................99
Operating Ratings(2) ......................................................................................................................................................99
Electrical Characteristics(4, 5) ........................................................................................................................................99
Timing Diagrams .........................................................................................................................................................101
EEPROM Timing.......................................................................................................................................................101
MII Timing.....................................................................................................................................................................102
RMII Timing...............................................................................................................................................................104
SPI Timing ................................................................................................................................................................105
Auto-Negotiation Timing ...........................................................................................................................................107
MDC/MDIO Timing....................................................................................................................................................108
Reset Timing.............................................................................................................................................................109
Reset Circuit Diagram...........................................................................................................................................110
Selection of Isolation Transformer(1) .........................................................................................................................111
Selection of Reference Crystal ..................................................................................................................................111
Package Information ...................................................................................................................................................112
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List of Figures
Figure 1. Typical Straight Cable Connection ............................................................................................................... 24
Figure 2. Typical Crossover Cable Connection ........................................................................................................... 25
Figure 3. Auto-Negotiation ........................................................................................................................................... 26
Figure 4. Destination Address Lookup Flow Chart, Stage 1 ........................................................................................ 30
Figure 5. Destination Address Resolution Flow Chart – Stage 2................................................................................. 31
Figure 6. 802.1p Priority Field Format.......................................................................................................................... 37
Figure 7. Tail Tag Frame Format .................................................................................................................................. 39
Figure 8. KSZ8864RMN EEPROM Configuration Timing Diagram ............................................................................. 43
Figure 9. SPI Write Data Cycle .................................................................................................................................... 44
Figure 10. SPI Read Data Cycle .................................................................................................................................. 44
Figure 11. SPI Multiple Write ....................................................................................................................................... 45
Figure 12. SPI Multiple Read ....................................................................................................................................... 45
Figure 13. EEPROM Interface Input Receive Timing Diagram.................................................................................. 101
Figure 14. EEPROM Interface Output Transmit Timing Diagram.............................................................................. 101
Figure 15. MAC Mode MII Timing – Data Received from MII ..................................................................................... 102
Figure 16. MAC Mode MII Timing – Data Transmitted from MII ................................................................................. 102
Figure 17. PHY Mode MII Timing – Data Received from MII...................................................................................... 103
Figure 18. PHY Mode MII Timing – Data Transmitted from MII.................................................................................. 103
Figure 19. RMII Timing – Data Received from RMII .................................................................................................. 104
Figure 20. RMII Timing – Data Transmitted to RMII .................................................................................................. 104
Figure 21. SPI Input Timing ....................................................................................................................................... 105
Figure 22. SPI Output Timing..................................................................................................................................... 106
Figure 23: Auto-Negotiation Timing ........................................................................................................................... 107
Figure 24. MDC/MDIO Timing.................................................................................................................................... 108
Figure 25. Reset Timing ............................................................................................................................................. 109
Figure 26. Recommended Reset Circuit .................................................................................................................... 110
Figure 27. Recommended Circuit for Interfacing with CPU/FPGA Reset.................................................................. 110
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KSZ8864RMN
List of Tables
Table 1. MDI/MDI-X Pin Definitions ............................................................................................................................. 23
Table 2. Internal Function Block Status ........................................................................................................................ 27
Table 3. Switch MAC 3 SW3-MII and MAC 4 SW4- MII Signals ................................................................................. 33
Table 4. MAC3 SW3-RMII and MAC4 SW4-RMII Connection..................................................................................... 35
Table 5. Tail Tag Rules ................................................................................................................................................. 39
Table 6. FID+DA Look-Up in the VLAN Mode ............................................................................................................. 41
Table 7. FID+SA Look-Up in the VLAN Mode.............................................................................................................. 41
Table 8. SPI Connections ............................................................................................................................................ 44
Table 9. MII Management Interface Frame Format ..................................................................................................... 46
Table 10. Serial Management Interface (SMI) Frame Format ..................................................................................... 46
Table 11. 100BT Rate Selection for the Rate limit....................................................................................................... 82
Table 12. 10BT Rate Selection for the Rate Limit........................................................................................................ 83
Table 13. Static MAC Address Table ........................................................................................................................... 86
Table 14. VLAN Table .................................................................................................................................................. 88
Table 15. VLAN ID and Indirect Registers ................................................................................................................... 89
Table 16. Dynamic MAC Address Table ...................................................................................................................... 90
Table 17. Port-1 MIB Counter Indirect Memory Offsets............................................................................................... 92
Table 18. Format of “Per Port” MIB Counter................................................................................................................ 93
Table 19. All Port Dropped Packet MIB Counters........................................................................................................ 93
Table 20. Format of “All Dropped Packet” MIB Counter .............................................................................................. 93
Table 21. EEPROM Timing Parameters .................................................................................................................... 101
Table 22. MAC Mode MII Timing Parameters............................................................................................................ 102
Table 23. PHY Mode MII Timing Parameters ............................................................................................................ 103
Table 24. RMII Timing Parameters ............................................................................................................................ 104
Table 25. SPI Input Timing Parameters ..................................................................................................................... 105
Table 26. SPI Output Timing Parameters .................................................................................................................. 106
Table 27. Auto-Negotiation Timing Parameters......................................................................................................... 107
Table 28. MDC/MDIO Typical Timing Parameters..................................................................................................... 108
Table 29. Reset Timing Parameters .......................................................................................................................... 109
Table 30. Transformer Selection Criteria ................................................................................................................... 111
Table 31. Qualified Magnetic Vendors ....................................................................................................................... 111
Table 32. Typical Reference Crystal Characteristics ................................................................................................. 111
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KSZ8864RMN
Pin Configuration
64-Pin QFN
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KSZ8864RMN
Pin Description
Pin Number
Pin Name
Type(1)
Port
Pin Function(2)
1
RXP1
I
1
Physical receive signal + (differential).
2
RXM1
I
1
Physical receive signal – (differential).
3
TXP1
O
1
Physical transmit signal + (differential).
4
TXM1
O
1
Physical transmit signal – (differential).
5
VDDA12
P
6
GND
GND
7
ISET
8
VDDAT
P
9
RXP2
I
2
Physical receive signal + (differential).
10
RXM2
I
2
Physical receive signal - (differential).
11
TXP2
O
2
Physical transmit signal + (differential).
12
TXM2
O
2
Physical transmit signal – (differential).
13
VDDAT
P
14
INTR_N
OPU
15
VDDC
P
16
SM3TXEN
IPD
3
MAC3 Switch MII/RMII transmit enable.
17
SM3TXD3
IPD
3
MAC3 Switch MII transmit bit 3.
18
SM3TXD2
IPD
3
MAC3 Switch MII transmit bit 2.
19
SM3TXD1
IPD
3
MAC3 Switch MII/RMII transmit bit 1.
20
SM3TXD0
IPD
3
MAC3 Switch MII/RMII transmit bit 0.
1.2V analog power.
Ground with all grounding of die bottom.
Set physical transmit output current. Pull-down with a
12.4kΩ1% resistor.
3.3V analog VDD.
3.3V analog VDD.
Interrupt. This pin is Open-Drain output pin.
1.2V digital core VDD.
MAC3 Switch MII transmit clock:
21
SM3TXC/SM3REFCLK
I/O
3
Input: SW3-MII MAC mode.
Output: SW3-MII PHY mode.
Input: SW3-RMII reference clock.
22
VDDIO
P
3.3V, 2.5V or 1.8V digital VDD for digital I/O circuitry.
MAC3 Switch MII Receive clock:
Input: SW3-MII MAC mode.
23
SM3RXC
I/O
3
Output: SW3-MII PHY mode.
Output: SW3-RMII reference clock.
Unused RMII clock can be pull-down or disable by register 87.
SM3RXDV: MAC3 Switch SW3-MII receive data valid.
24
SM3RXDV/SM3CRSDV
IPD/O
3
SM3CRSDV: MAC3 Switch SW3-RMII Carrier Sense/Receive
Data Valid.
MAC3 Switch MII receive bit 3.
Strap option:
25
SM3RXD3
IPD/O
3
PD (default) = enable flow control;
PU = disable flow control.
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KSZ8864RMN
Pin Number
Pin Name
Type(1)
Port
26
SM3RXD2
IPD/O
3
Pin Function(2)
MAC3 Switch MII receive bit 2 and Strap option:
PD (default) = disable back pressure;
PU = enable back pressure.
MAC3 Switch MII/RMII receive bit 1.
27
SM3RXD1
IPD/O
3
Strap option:
PD (default) = drop excessive collision packets;
PU = does not drop excessive collision packets.
MAC3 Switch MII/RMII receive bit 0.
Strap option:
28
SM3RXD0
IPD/O
3
PD (default) = disable aggressive back-off algorithm in halfduplex mode;
PU = enable for performance enhancement.
29
SM3CRS
IPD/O
3
MAC3 Switch MII carrier sense.
30
GND
GND
31
SM3COL
IPD/O
3
MAC3 Switch MII collision detect.
Ground with all grounding of die bottom.
32
SM4TXEN
IPD
4
MAC4 Switch MII/RMII transmit enable.
33
SM4TXD3
IPD
4
MAC4 Switch MII transmit bit 3.
34
SM4TXD2
IPD
4
MAC4 Switch MII transmit bit 2.
35
SM4TXD1
IPD
4
MAC4 Switch MII/RMII transmit bit 1.
36
SM4TXD0
IPD
4
MAC4 Switch MII/RMII transmit bit 0.
MAC4 Switch MII transmit clock:
Input: SW4-MII MAC mode clock.
37
SM4TXC/SM4REFCLK
I/O
4
Input: SW4-RMII reference clock, please also see the strap-in
pin P1LED1 for the clock mode and normal mode.
Output: SW4-MII PHY modes.
38
VDDIO
P
3.3V, 2.5V or 1.8V digital VDD for digital I/O circuitry.
MAC4 Switch MII Receive clock:
Input: SW4-MII MAC mode.
Output: SW4-MII PHY mode.
39
SM4RXC
I/O
4
Output: SW4-RMII 50MHz reference clock (the device is
default clock mode, the clock source comes from X1/X2 pins
25MHz crystal).
When set the device as normal mode (the chip’s clock source
comes from SM4TXC), the SM4RXC reference clock output
should be disabled by the register 87. Please also see the
strap-in pin P1LED1 for the selection of the clock mode and
normal mode.
SM4RXDV: MAC4 Switch SW4-MII receive data valid.
40
September 2011
SM4RXDV/SM4CRSDV
IPD/O
4
SM4CRSDV: MAC4 Switch SW4-RMII Carrier Sense/Receive
Data Valid
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Micrel, Inc.
Pin Number
KSZ8864RMN
Pin Name
Type(1)
Port
Pin Function(2)
MAC4 Switch MII receive bit 3.
41
SM4RXD3
IPD/O
4
Strap option:
PD (default) = Disable Switch MII/RMII full-duplex flow control;
PU = Enable Switch MII/RMII full-duplex flow control.
MAC4 Switch MII receive bit 2.
42
SM4RXD2
IPD/O
4
Strap option:
PD (default) = Switch MII/RMII in full-duplex mode;
PU = Switch MII/RMII in half-duplex mode.
MAC4 Switch MII/RMII receive bit 1.
43
SM4RXD1
IPD/O
4
Strap option:
PD (default) =MAC4 Switch SW4-MII/RMII in 100Mbps mode;
PU = MAC4 Switch SW-5MII/RMII in 10Mbps mode.
MAC4 Switch MII/RMII receive bit 0.
Strap option: LED mode
PD (default) = mode 0;
PU = Mode 1.
44
SM4RXD0
IPD/O
4
See “Register 11.”
Mode 0
Mode 1
PxLED1
Lnk/Act
100Lnk/Act
PxLED0
Speed
Full duplex
MAC4 Switch MII collision detect:
45
SM4COL
IPD/O
4
Input: SW4-MII MAC modes.
Output: SW4-MII PHY modes.
MAC4 Switch MII modes carrier sense:
46
SM4CRS
IPD/O
4
Input: SW4-MII MAC modes.
Output: SW4-MII PHY modes.
MAC4 Switch SW4-MII enabled with PHY mode or MAC mode,
have to configure SCONF1 Pin 47 with SCONF0 Pin 48
together.
See pins configutation table below:
47
SCONF1
Pin# (47,48)
IPD
00 (Default)
48
SCONF0
Port 4 Switch MAC4
SW4- MII
SW4-MII PHY mode
01
Disabled
10
Disabled
11
SW4-MII MAC mode
Port 4 Switch SW4-MII enabled with PHY mode or MAC mode,
have to configure SCONF0 pin 48 with SCONF1 Pin 47
together.
IPD
See Pin 47 description.
LED indicator for Port 2.
49
September 2011
P2LED1
IPU/O
2
This pin has to be pulled down by 1K resistor in the design for
KSZ8864RMN.
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Pin Number
KSZ8864RMN
Pin Name
Type(1)
Port
Pin Function(2)
LED indicator for Port 2.
Strap option: Switch MAC3 used only.
50
P2LED0
IPU/O
2
PU (default) = Select MII interface for the Switch MAC3 SW3MII.
PD = Select RMII interface for the Switch MAC3 SW3-RMII.
LED indicator for Port 1.
Strap option: Switch RMII used only.
PU (default) = Select the device as clock mode, when use
RMII interface, all clock source come from pin x1/x2 crystal
25MHz.
51
P1LED1
IPU/O
1
PD = Select the device as normal mode when use RMII
interface. All clock source comes from SW4-RMII SM4TXC pin
with an external input 50MHz clock. In the normal mode, the
25MHz crystal clock from pin X1/X2 doesn’t take affect and
should disable SW4-RMII SW4RXC 50MHz clock output by the
register 87.
The normal mode is used when SW4-RMII receive an external
50MHz RMII reference clock from pin SM4TXC.
LED indicator for Port 1.
Strap option: for Switch MAC4 only.
52
P1LED0
IPU/O
1
PU (default) = Select MII interface for the Switch MAC4 SW4MII.
PD = Select RMII interface for the Switch MAC4 SW4-RMII.
53
MDC
IPU
All
MII management interface clock. Or SMI interface clock
54
MDIO
IPU/O
All
MII management data I/O. Or SMI interface data I/O
Features internal pull down to define pin state when not driven.
Note: Need an external pull-up when driven.
55
SPIQ
IPU/O
SPIC/SCL
IPU/O
All
SPI serial data output in SPI slave mode.
Note: Need an external pull-up when driven.
(1) Input clock up to 25MHz in SPI slave mode,
56
All
(2) output clock at 61KHz in I2C master mode.
Note: Need an external pull-up when driven.
(1) Serial data input in SPI slave mode;
57
SPID/SDA
IPU/O
All
(2) serial data input/output in I2C master mode.
Note: Need an external pull-up when driven.
Active low.
58
SPIS_N
IPU
All
(1) SPI data transfer start in SPI slave mode. When SPIS_N is
high, the device is deselected and SPIQ is held in high
impedance state, a high-to-low transition to initiate the SPI data
transfer.
2
(2) Not used in I C master mode.
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Pin Number
KSZ8864RMN
Pin Name
Type(1)
Port
Pin Function(2)
Serial bus configuration pin.
For this case, if the EEPROM is not present, the Switch will
start itself with the PS[1.0] = 00 default register values.
59
PS1
IPD
Pin Configuration
Serial Bus Configuration
PS[1.0]=00
I2C Master Mode for EEPROM
PS[1.0]=01
SMI Interface Mode
PS[1.0]=10
SPI Slave Mode for CPU Interface
PS[1.0]=11
Factory Test Mode (BIST)
60
PS0
IPD
Serial bus configuration pin.
61
RST_N
IPU
Reset the device. Active low.
62
VDDC
P
1.2V digital core VDD.
63
X1
I
25MHz crystal clock connection/or 3.3V Oscillator input.
Crystal/Oscillator should be <= ±50ppm tolerance.
64
X2
O
25MHz crystal clock connection.
Notes:
1.
P = Power supply.
I = Input.
O = Output.
I/O = Bidirectional.
GND = Ground.
IPU = Input w/internal pull-up.
IPD = Input w/internal pull-down.
IPD/O = Input w/internal pull-down during reset, output pin otherwise.
IPU/O = Input w/internal pull-up during reset, output pin otherwise.
NC = No connect.
2.
PU = Strap pin pull-up.
PD = Strap pull-down.
OTRI = Output tristated.
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KSZ8864RMN
Pin for Strap-in Options
The KSZ8864RMN can function as a managed switch or unmanaged switch. If no EEPROM or micro-controller
exists, the KSZ8864RMN will operate from its default setting. The strap-in option pins can be configures by external
pull-up/down resistors and take the effect after power up reset or warm reset, the functions are described in the
following table:
Pin Number
Pin Name
Type(1)
Port
Pin Function(2)
MAC3 Switch MII receive bit 3
25
SM3RXD3
IPD/O
Strap option:
PD (default) = enable flow control;
PU = disable flow control.
MAC3 Switch MII receive bit 2 and Strap option:
26
SM3RXD2
IPD/O
PD (default) = disable back pressure;
PU = enable back pressure.
MAC3 Switch MII/RMII receive bit 1
27
SM3RXD1
IPD/O
Strap option:
PD (default) = drop excessive collision packets;
PU = does not drop excessive collision packets.
MAC3 Switch MII/RMII receive bit 0
28
SM3RXD0
IPD/O
Strap option:
PD (default) = disable aggressive back-off algorithm in half-duplex mode;
PU = enable for performance enhancement.
MAC4 Switch MII receive bit 3.
41
SM4RXD3
IPD/O
Strap option:
PD (default) = Disable Switch MII/RMII full-duplex flow control;
PU = Enable Switch MII/RMII full-duplex flow control.
MAC4 Switch MII receive bit 2.
42
SM4RXD2
IPD/O
Strap option:
PD (default) = Switch MII/RMII in full-duplex mode;
PU = Switch MII/RMII in half-duplex mode.
MAC4 Switch MII/RMII receive bit 1.
43
SM4RXD1
IPD/O
Strap option:
PD (default) =MAC4 Switch SW4-MII/RMII in 100Mbps mode;
PU = MAC4 Switch SW-5MII/RMII in 10Mbps mode.
MAC4 Switch MII/RMII receive bit 0.
Strap option: LED mode
PD (default) = mode 0;
44
47
September 2011
SM4RXD0
SCONF1
IPD/O
IPD
PU = mode 1.
See “Register 11.”
Mode 0
Mode 1
PxLED1
Lnk/Act
100Lnk/Act
PxLED0
Speed
Full duplex
MAC4 Switch SW4-MII enabled with PHY mode or MAC mode, have to
configure SCONF1 Pin 47 with SCONF0 Pin 48 together.
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Pin Number
KSZ8864RMN
Pin Name
Type(1)
Port
Pin Function(2)
See pins configuration table below:
Switch MAC4
Pin# (47,48)
SW4- MII/RMII
00 (Default)
48
SCONF0
SW4-MII PHY mode
01
Disabled
10
Disabled
11
SW4-MII MAC mode
Port 4 Switch SW4-MII enabled with PHY mode or MAC mode, have to
configure SCONF0 Pin 48 with SCONF1 Pin 47 together.
IPD
See pin 47 description.
LED indicator for Port 2.
49
P2LED1
IPU/O
2
This pin has to be pulled down by 1K resistor in the design for
KSZ8864RMN.
LED indicator for Port 2.
50
P2LED0
IPU/O
2
Strap option: Switch MAC3 used only.
PU (default) = Select MII interface for the Switch MAC3 SW3-MII.
PD = Select RMII interface for the Switch MAC3 SW3-RMII.
LED indicator for Port 1.
Strap option: Switch RMII used only.
PU (default) = Select the device as clock mode. When use RMII interface, all
clock source come from Pin x1/x2 crystal 25MHz.
51
P1LED1
IPU/O
1
PD = Select the device as normal mode when use RMII interface. All clock
source comes from SW4-RMII SM4TXC pin with an external input 50MHz
clock. In the normal mode, the 25MHz crystal clock from pin X1/X2 doesn’t
take affect and should disable SW4-RMII SW4RXC 50MHz clock output by
the register 87.
The normal mode is used when SW4-RMII receive an external 50MHz RMII
reference clock from pin SM4TXC.
LED indicator for Port 1.
52
P1LED0
IPU/O
1
Strap option: for Switch MAC4 only.
PU (default) = Select MII interface for the Switch MAC4 SW4-MII.
PD = Select RMII interface for the Switch MAC4 SW4-RMII.
Serial bus configuration pin.
For this case, if the EEPROM is not present, the Switch will start itself with
the PS[1.0] = 00 default register values.
59
September 2011
PS1
IPD
Pin Configuration
Serial Bus Configuration
PS[1.0]=00
I2C Master Mode for EEPROM
PS[1.0]=01
SMI Interface Mode
PS[1.0]=10
SPI Slave Mode for CPU Interface
PS[1.0]=11
Factory Test Mode (BIST)
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KSZ8864RMN
Notes:
1.
P = Power supply.
I = Input.
O = Output.
I/O = Bidirectional.
GND = Ground.
IPU = Input w/internal pull-up.
IPD = Input w/internal pull-down.
IPD/O = Input w/internal pull-down during reset, output pin otherwise.
IPU/O = Input w/internal pull-up during reset, output pin otherwise.
NC = No connect.
2.
PU = Strap pin pull-up.
PD = Strap pull-down.
OTRI = Output tristated.
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KSZ8864RMN
Introduction
The KSZ8864RMN contains two 10/100 physical layer transceivers and four media access control (MAC) units with
an integrated Layer 2 managed switch. The device runs in multiple modes. They are two copper + two MAC MII, two
copper + two MAC RMII, two copper + 1 MAC MII+ 1 MAC RMII and two copper + 1 MAC MII or 1 MAC RMII. Those
are useful for implementing multiple products in many applications.
The KSZ8864RMN has the flexibility to reside in a managed or unmanaged design. In a managed design, a host
processor has complete control of the KSZ8864RMN via the SPI bus, or partial control via the MDC/MDIO interface.
An unmanaged design is achieved through I/O strapping or EEPROM programming at system reset time.
On the media side, the KSZ8864RMN supports IEEE 802.3 10BASE-T, 100BASE-TX on all ports with Auto
MDI/MDIX. The KSZ8864RMN can be used as fully managed 4-port switch through two microprocessors by its two
MII interface or RMII interface for an advance management application.
Physical signal transmission and reception are enhanced through the use of patented analog circuitry with enhanced
mix signal technology that makes the design more efficient and allows for lower power consumption and smaller chip
die size.
The major enhancements of the KSZ8864RMN is small package with configuble of two MII and RMII modes for two
MAC interfaces. The KSZ8864RMN supports more new features for host processor management, multiple kind of
packets filtering, tag as well as port based VLAN, rapid spanning tree support, IGMP snooping support, port mirroring
support and more flexible rate limiting and more functionality.
Functional Overview: Physical Layer Transceiver
100BASE-TX Transmit
The 100BASE-TX transmit function performs parallel-to-serial conversion, 4B/5B coding, scrambling, NRZ-to-NRZI
conversion, MLT3 encoding and transmission. The circuit 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 external 1% 12.4kΩ resistor for the 1:1
transformer ratio. It 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 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 starts 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 length of the cable, the equalizer has to
adjust its characteristics to optimize the performance. In this design, the variable equalizer will make an initial
estimation based on comparisons of incoming signal strength against some known cable characteristics, then tunes
itself for optimization. This is an ongoing process and can self-adjust against environmental changes such as
temperature variations.
The equalized signal then goes through a DC restoration and data conversion block. The DC restoration circuit is
used to compensate for the effect of baseline wander and 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. The signal is then 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.
PLL Clock Synthesizer
The KSZ8864RMN generates 125MHz, 83MHz, 41MHz, 25MHz and 10MHz clocks for system timing. Internal clocks
are generated from an external 25MHz crystal or oscillator.
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KSZ8864RMN
Scrambler/De-Scrambler (100BASE-TX only)
The purpose of the scrambler is to spread the power spectrum of the signal in order to reduce EMI and baseline
wander. The data is scrambled through the use of an 11-bit wide linear feedback shift register (LFSR). This can
generate a 2047-bit non-repetitive sequence. The receiver will then de-scramble the incoming data stream with the
same sequence at the transmitter.
10BASE-T Transmit
The output 10BASE-T driver is incorporated into the 100BASE-T driver to allow transmission with the same
magnetics. They are internally wave-shaped and pre-emphasized into outputs with a typical 2.3V amplitude. The
harmonic contents are at least 27dB below the fundamental when driven by an all-ones Manchester-encoded signal.
10BASE-T Receive
On the receive side, input buffer and level detecting squelch circuits are employed. A differential input receiver circuit
and a 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 pulsewidths in order to prevent
noises 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 KSZ8864RMN decodes a data frame. The receiver clock is maintained
active during idle periods in between data reception.
MDI/MDI-X Auto Crossover
To eliminate the need for crossover cables between similar devices, the KSZ8864RMN supports HP Auto MDI/MDI-X and IEEE
802.3u standard MDI/MDI-X auto crossover. HP Auto MDI/MDI-X is the default.
The auto-sense function detects remote transmit and receive pairs and correctly assigns transmit and receive pairs for the
KSZ8898MQ/TMQ device. This feature is extremely useful when end users are unaware of cable types, and also, saves on an
additional uplink configuration connection. The auto-crossover feature can be disabled through the port control registers, or MIIM
PHY registers. The IEEE 802.3u standard MDI and MDI-X definitions are:
MDI
MDI-X
RJ-45 Pins
Signals
RJ-45 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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KSZ8864RMN
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 depicts a typical straight cable connection between a NIC card (MDI) and a switch, or hub (MDI-X).
Figure 1. Typical Straight Cable Connection
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KSZ8864RMN
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).
Figure 2. Typical Crossover Cable Connection
Auto-Negotiation
The KSZ8864RMN conforms to the auto-negotiation protocol as described by the 802.3 committee. Auto-negotiation
allows unshielded twisted pair (UTP) link partners to select the highest common mode of operation. Link partners
advertise their capabilities to each other, and then compare their own capabilities with those they received from their
link partners. The highest speed and duplex setting that is common to the two link partners is selected as the mode
of operation.
The following list shows the speed and duplex operation mode from highest to lowest.
Highest: 100Base-TX, full-duplex
High: 100Base-TX, half-duplex
Low: 10Base-T, full-duplex
Lowest: 10Base-T, half-duplex
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If auto-negotiation is not supported or the KSZ8864RMN link partner is forced to bypass auto-negotiation, then the
KSZ8864RMN sets its operating mode by observing the signal at its receiver. This is known as parallel detection, and
allows the KSZ8864RMN to establish link by listening for a fixed signal protocol in the absence of auto-negotiation
advertisement protocol. The auto-negotiation link up process is shown in the following flow chart:
Figure 3. Auto-Negotiation
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On-Chip Termination Resistors
The KSZ8864RMN reduces board cost and simplifies board layout by using on-chip termination resistors for RX/TX
differential pairs without the external termination resistors. The solution of the on chip termination and internal biasing
will enhance much power consumption compare with using external biasing and termination resistors, and the
transformer will not consume power any longer. The center tap doesn’t need to be tied to analog power, just leave
them floating or connect the capacitors to ground separately.
Functional Overview: Power Management
The KSZ8864RMN can also use multiple power level of 3.3V, 2.5V or 1.8V for VDDIO to support different I/O voltage.
The KSZ8864RMN supports enhanced power management feature in low power state with energy detection to
ensure low-power dissipation during device idle periods. There are five operation modes under the power
management function which is controlled by the Register 14 bit [4:3] and the Port Register Control 13 bit3 as shown
below:
Register 14 bit [4:3] = 00 Normal Operation Mode
Register 14 bit [4:3] = 01 Energy Detect Mode
Register 14 bit [4:3] = 10 Soft Power Down Mode
Register 14 bit [4:3] = 11 Power Saving Mode
The Port Register Control 13 bit 3 =1 is for the Port Based Power-Down Mode
Table 2 indicates all internal function blocks status under four different power management operation modes.
Power Management Operation Modes
KSZ8864RMN
Function Blocks
Normal Mode
Power Saving Mode
Energy Detect Mode
Soft Power Down Mode
Internal PLL Clock
Enabled
Enabled
Disabled
Disabled
Tx/Rx PHY
Enabled
Rx unused block
disabled
Energy detect at Rx
Disabled
MAC
Enabled
Enabled
Disabled
Disabled
Host Interface
Enabled
Enabled
Disabled
Disabled
Table 2. Internal Function Block Status
Normal Operation Mode
This is the default setting bit [4:3] =00 in register 14 after the chip power-up or hardware reset. When KSZ8864RMN
is in this normal operation mode, all PLL clocks are running, PHY and MAC are on and the host interface is ready for
CPU read or write.
During the normal operation mode, the host CPU can set the bit [4:3] in register 14 to transit the current normal
operation mode to any one of the other three power management operation modes.
Energy Detect Mode
The energy detect mode provides a mechanism to save more power than in the normal operation mode when the
KSZ8864RMN is not connected to an active link partner. In this mode, if the cable is not plugged, then the
KSZ8864RMN can automatically enter to a low power state, i.e., the energy detect mode. In this mode,
KSZ8864RMN will keep transmitting 120ns width pulses at 1 pulse/s rate. Once activity resumes due to plugging a
cable or attempting by the far end to establish link, the KSZ8864RMN can automatically power up to normal power
state in energy detect mode.
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Energy detect mode consists of two states, normal power state and low power state. While in low power state, the
KSZ8864RMN reduces power consumption by disabling all circuitry except the energy detect circuitry of the receiver.
The energy detect mode is entered by setting bit [4:3] = 01 in register 14. When the KSZ8864RMN is in this mode, it
will monitor the cable energy. If there is no energy on the cable for a time longer than pre-configured value at bit [7:0]
Go-Sleep time in register 15, then the KSZ8864RMN will go into a low power state. When KSZ8864RMN is in low
power state, it will keep monitoring the cable energy. Once the energy is detected from the cable, KSZ8864RMN will
enter normal power state. When KSZ8864RMN is at normal power state, it is able to transmit or receive packet from
the cable.
Soft Power-Down Mode
The soft power-down mode is entered by setting bit [4:3] =10 in register 14. When KSZ8864RMN is in this mode, all
PLL clocks are disabled, also all of PHYs and the MACs are off. Any dummy host access will wake-up this device
from current soft power down mode to normal operation mode and internal reset will be issued to make all internal
registers go to the default values.
Power Saving Mode
The power saving mode is entered when auto-negotiation mode is enabled, cable is disconnected, and by setting bit
[4:3] =11 in register 14. When KSZ8864RMN is in this mode, all PLL clocks are enabled, MAC is on, all internal
registers value will not change, and host interface is ready for CPU read or write. In this mode, it mainly controls the
PHY transceiver on or off based on line status to achieve power saving. The PHY remains transmitting and only turns
off the unused receiver block. Once activity resumes due to plugging a cable or attempting by the far end to establish
link, the KSZ8864RMN can automatically enabled the PHY power up to normal power state from power saving mode.
During this power saving mode, the host CPU can set bit [4:3] in register 14 to transit the current power saving mode
to any one of the other three power management operation modes.
Port-Based Power-Down Mode
In addition, the KSZ8864RMN features a per-port power down mode. To save power, a PHY port that is not in use
can be powered down by the port registers control 13 bit3, or MIIM PHY registers 0 bit11.
Functional Overview: Switch Core
Address Look-Up
The internal look-up table stores MAC addresses and their associated information. It contains a 1K unicast address
table plus switching information. The KSZ8864RMN is guaranteed to learn 1K addresses and distinguishes itself
from a hash-based look-up table which, depending upon the operating environment and probabilities, may not
guarantee the absolute number of addresses it can learn.
Learning
The internal look-up engine updates its table with a new entry if the following conditions are met:
The received packet’s source address (SA) does not exist in the look-up table.
The received packet is good; the packet has no receiving errors and is of legal length.
The look-up engine inserts the qualified SA into the table, along with the port number and time stamp. If the table is
full, the last entry of the table is deleted first to make room for the new entry.
Migration
The internal look-up engine also monitors whether a station is moved. If this occurs, it updates the table accordingly.
Migration happens when the following conditions are met:
The received packet’s SA is in the table but the associated source port information is different.
The received packet is good; the packet has no receiving errors and is of legal length.
The look-up engine will update the existing record in the table with the new source port information.
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Aging
The look-up engine will update 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 will
remove the record from the table. The look-up engine constantly performs the aging process and will continuously
remove aging records. The aging period is 300 +/- 75 seconds. This feature can be enabled or disabled through
Register 3. See “Register 3” section.
Forwarding
The KSZ8864RMN will forward packets using an algorithm that is depicted in the following flowcharts. Figure 6
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 the spanning tree, IGMP snooping, port mirroring, and port VLAN processes to come up with “port to
forward 2” (PTF2), as shown in Figure 7. This is where the packet will be sent.
KSZ8864RMN will not forward the Following Packets:
Error packets. These include framing errors, FCS errors, alignment errors, and illegal size packet errors.
802.3x pause frames. The KSZ8864RMN will intercept these packets and perform the appropriate actions.
“Local” packets. Based on destination address (DA) look-up. If the destination port from the look-up table
matches the port where the packet was from, the packet is defined as “local.”
Switching Engine
The KSZ8864RMN 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
KSZ8864RMN has a 64kB internal frame buffer. This resource is shared between all five ports. There are a total of
512 buffers available. Each buffer is sized at 128B.
Media Access Controller (MAC) Operation
The KSZ8864RMN strictly abides by IEEE 802.3 standards to maximize compatibility.
Inter-Packet Gap (IPG)
If a frame is successfully transmitted, the 96-bit time IPG is measured between the two consecutive MTXEN. If the
current packet is experiencing collision, the 96-bit time IPG is measured from MCRS and the next MTXEN.
Backoff Algorithm
The KSZ8864RMN implements the IEEE Std. 802.3 binary exponential back-off algorithm, and optional “aggressive
mode” back off. After 16 collisions, the packet will be optionally dropped depending on the chip configuration in
Register 3. See “Register 3.”
Late Collision
If a transmit packet experiences collisions after 512-bit times of the transmission, the packet will be dropped.
Illegal Frames
The KSZ8864RMN discards frames less than 64 bytes and can be programmed to accept frames up to 1536 bytes in
Register 4. For special applications, the KSZ8864RMN can also be programmed to accept frames up to 1916 bytes
in Register 4. Since the KSZ8864RMN supports VLAN tags, the maximum sizing is adjusted when these tags are
present.
Flow Control
The KSZ8864RMN supports standard 802.3x flow control frames on both transmit and receive sides.
On the receive side, if the KSZ8864RMN receives a pause control frame, the KSZ8864RMN 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
(being flow controlled), only flow control packets from the KSZ8864RMN will be transmitted.
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On the transmit side, the KSZ8864RMN 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 KSZ8864RMN flow controls a port that has just received a packet if the destination port resource is busy. The
KSZ8864RMN issues a flow control frame (XOFF), containing the maximum pause time defined in IEEE standard
802.3x. Once the resource is freed up, the KSZ8864RMN 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 also provided to
prevent over-activation and deactivation of the flow control mechanism.
The KSZ8864RMN flow controls all ports if the receive queue becomes full.
Figure 4. Destination Address Lookup Flow Chart, Stage 1
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Figure 5. Destination Address Resolution Flow Chart – Stage 2
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The KSZ8864RMN 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. IEEE802.3x PAUSE Frames.
KSZ8864RMN intercepts these packets and performs full duplex flow control accordingly.
3. "Local" Packets.
Based on destination address (DA) lookup, if the destination port from the lookup table matches the port from
which the packet originated, the packet is defined as "local."
Half-Duplex Back Pressure
The KSZ8864RMN also provides a half-duplex back pressure option (note: this is not listed in IEEE 802.3 standards).
The activation and deactivation conditions are the same as the ones given for full-duplex mode. If back pressure is
required, the KSZ8864RMN sends preambles to defer the other station's transmission (carrier sense deference). To
avoid jabber and excessive deference as defined in IEEE 802.3 standard, after a certain period of time, the
KSZ8864RMN discontinues carrier sense but raises it quickly after it drops packets to inhibit other transmissions.
This short silent time (no carrier sense) is to prevent other stations from sending out packets and keeps other
stations in a carrier sense deferred state. If the port has packets to send during a back pressure situation, the carriersense-type back pressure is interrupted and those packets are transmitted instead. If there are no more packets to
send, carrier-sense-type back pressure becomes active again until switch resources are free. If a collision occurs, the
binary exponential backoff algorithm is skipped and carrier sense is generated immediately, reducing the chance of
further colliding and maintaining carrier sense to prevent reception of packets.To ensure no packet loss in 10BASE-T
or 100BASE-TX half-duplex modes, the user must enable the following:
Aggressive backoff (Register 3, bit 0)
No excessive collision drop (Register 4, bit 3)
Back pressure (Register 4, bit 5)
These bits are not set as the default because this is not the IEEE standard.
Broadcast Storm Protection
The KSZ8864RMN has an intelligent option to protect the switch system from receiving too many broadcast packets.
Broadcast packets are normally forwarded to all ports except the source port and thus use too many switch
resources (bandwidth and available space in transmit queues). The KSZ8864RMN 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. The rate is based on a 50ms interval for 100BT and a 500ms interval for
10BT. At the beginning of each interval, the counter is cleared to zeroand the rate limit mechanism starts to count the
number of bytes during the interval. The rate definition is described in Registers 6 and 7. The default setting for
Registers 6 and 7 is 0 x 4 A (74 decimal). This is equal to a rate of 1%, calculated as follows: 148,800 frames/sec ¥
50ms/interval ¥ 1% = 74 frames/interval (approx.) = 0x4A.
MII Interface Operation
The media independent interface (MII) is specified by the IEEE 802.3 committee and provides a common interface
between physical layer and MAC layer devices. The KSZ8864RMN provides two MAC layer interfaces for MAC 3
and MAC 4. Each of these MII/RMII interfaces contains two distinct groups of signals, one for transmission and the
other for receiving.
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Switch MAC3/MAC4 SW3/SW4-MII Interface
Table 3 shows two connection manners,
1. The first is an external MAC connects to SW3/SW4-MII PHY mode.
2. The second is an external PHY connects to SW3/SW4-MII MAC mode.
Please see the pins [47, 48] description for detail configuration for the MAC mode and PHY mode of the port 4 MAC4
SW4-MII, the default is SW4-MII with PHY mode. Please see the strap pin P2LED0 and the register 223 bit 6 for the
MAC mode and PHY mode of the port 3 MAC3 SW3-MII, the default is SW3-MII with PHY mode also.
KSZ8864RMN PHY Mode Connection
KSZ8864RMN MAC Mode Connection
Description
External
PHY
KSZ8864RMN
SW3/4-MII Signals
Type
Transmit enable
MTXEN
SMxRXDV
Output
Input
Transmit data bit 3
MTXD3
SMxRXD[3]
Output
SMxTXD[2]
Input
Transmit data bit 2
MTXD2
SMxRXD[2]
Output
MTXD1
SMxTXD[1]
Input
Transmit data bit 1
MTXD1
SMxRXD[1]
Output
MTXD0
SMxTXD[0]
Input
Transmit data bit 0
MTXD0
SMxRXD[0]
Output
MTXC
SMxTXC
Output
Transmit clock
MTXC
SMxRXC
Input
MCOL
SMxCOL
Output
Collision detection
MCOL
SMxCOL
Input
MCRS
SMxCRS
Output
Carrier sense
MCRS
SMxCRS
Input
MRXDV
SMxRXDV
Output
Receive data valid
MRXDV
SMxTXEN
Input
MRXD3
SMxRXD[3]
Output
Receive data bit 3
MRXD3
SMxTXD[3]
Input
MRXD2
SMxRXD[2]
Output
Receive data bit 2
MRXD2
SMxTXD[2]
Input
MRXD1
SMxRXD[1]
Output
Receive data bit 1
MRXD1
SMxTXD[1]
Input
MRXD0
SMxRXD[0]
Output
Receive data bit 0
MRXD0
SMxTXD[0]
Input
MRXC
SMxRXC
Output
Receive clock
MRXC
SMxTXC
Input
External
MAC
KSZ8864RMN
SW3/4-MII Signals
Type
MTXEN
SMxTXEN
Input
MTXD3
SMxTXD[3]
MTXD2
Note:
‘x’ is 3 or 4 for SW3 or SW4 in the table.
Table 3. Switch MAC 3 SW3-MII and MAC 4 SW4- MII Signals
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The switch MII interface operates in either MAC mode or PHY mode for KSZ8864RMN. These interfaces are nibblewide data interfaces and therefore run at one-quarter the network bit rate (not encoded). Additional signals on the
transmit side indicate when data is valid or when an error occurs during transmission. Likewise, the receive side has
indicators that convey when the data is valid and without physical layer errors. For half-duplex operation, there is a
signal that indicates a collision has occurred during transmission.
Note that the signal MRXER is not provided on the SWx-MII interface and the signal MTXER is not provided on the
SWx-MII interface for both PHY and MAC mode operation. Normally MRXER would indicate a receive error coming
from the physical layer device. MTXER would indicate a transmit error from the MAC device. These signals are not
appropriate for this configuration. For PHY mode operation, if the device interfacing with the KSZ8864RMN has an
MRXER pin, it should be tied low. For MAC mode operation, if the device interfacing with the KSZ8864RMN has an
MTXER pin, it should be tied low.
Switch MAC3/MAC4 SW3/SW4-RMII Interface
The Reduced Media Independent Interface (RMII) specifies a low pin count Media Independent Interface (MII). The
KSZ8864RMN supports RMII interface at Port 3 and port 4 switch sides and provides a common interface at MAC3
and MAC4 layer in the device, and has the following key characteristics:
Supports 10Mbps and 100Mbps data rates.
Uses a single 50 MHz clock reference (provided internally or externally): in internal mode, the chip provides
reference clock from SMxRXC pin to SMxTXC/SMxREFCLK pin and the reference clock-in pin of the opposite
RMII; in external mode, the chip receives 50MHz reference clock from an external oscillator or opposite RMII
interface to SW4TXC/SM4REFCLK pin only.
Provides independent 2-bit wide (bi-bit) transmit and receive data paths.
Table 4 shows two types of RMII connections of MAC to MAC and MAC to PHY,
The first is an external MAC connects to SW3/4-RMII with ‘PHY mode’.
The second is an external PHY connects to SW3/4-RMII with ‘MAC mode’.
When the strap pin P1LED0 is pulled down, the switch MAC4 is SW4-RMII mode after power up reset or warm reset.
When the strap pin P2LED0 is pulled down, the switch MAC3 is SW3-RMII mode after power up reset or warm reset.
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SW3/4-RMII MAC to MAC Connection
(“PHY” Mode)
SW3/4-RMII MAC to PHY Connection
(“MAC” Mode)
Description
External
MAC
KSZ8864RMN
Signal
KSZ8864RMN SW
Signal Type
KSZ8864RMN
Signal
KSZ8864RMN SW
Signal Type
REF_CLK
SMxRXC
Output
(Clock mode
with 50MHz)
SMxTXC
/SMxREFCLK
Input
(Clock comes from
SMxRXC in clock
mode or external
50MHz clock)
Reference
Clock
CRS_DV
SMxRXDV
/SMxCRSDV
Output
Carrier
Sense/Receive
Data Valid
CRS_DV
SMxTXEN
Input
RXD1
SMxRXD[1]
Output
Receive
Data Bit 1
RXD1
SMxTXD[1]
Input
RXD0
SMxRXD[0]
Output
Receive
Data Bit 0
RXD0
SMxTXD[0]
Input
TX_EN
SMxTXEN
Input
Transmit Data
Enable
TX_EN
TXD1
SMxTXD[1]
Input
Transmit
Data Bit 1
TXD1
SMxRXD[1]
Output
TXD0
SMxTXD[0]
Input
Transmit
Data
Bit 0
TXD0
SMxRXD[0]
Output
(Not
Used)
(Not Used)
Receive
Error
(Not Used)
(not used)
Reference
Clock
REF_CLK
SMxRXC
SMxTXC
/SMxREFCLK
Input
(Clock comes from
SMxRXC in clock
mode or external
50MHz clock)
External
PHY
SMxRXDV
/SMxCRSDV
Output
Output
(Clock mode
with 50MHz )
Note:
1.
‘x’ is 3 or 4 for SW3 or SW4 in the table.
2.
MAC/PHY mode in RMII is difference with MAC/PHY mode in MII, there is no strap pin and register configuration request in RMII, just follow
the signals connection in the table.
Table 4. MAC3 SW3-RMII and MAC4 SW4-RMII Connection
KSZ8864RMN provides two RMII interfaces for MAC3 and MAC4:
Switch MAC4 SW4-RMII interface can be used to provide 50MHz clock to opposite RMII from SM4RXC pin with
loop back to SM4TXC pin. The SW4-RMII interface can be used to accept 50MHz from external 50MHz clock to
SM4TXC when KSZ8864RMN is configured to normal mode by the strap pin P1LED1 pull-down. In the normal
mode, the clock source of the KSZ8864RMN comes from the SM4TXC.
Switch MAC3 SW3-RMII interface can be used to provide 50MHz clock to opposite RMII from SM3RXC pin with
loop back to SM3TXC pin. The SW3-RMII interface can not be used to accept 50MHz from external to SM3TXC
with the normal mode configuration.
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The default of the device is clock mode because the P1LED1 is pulled up internally, the clock mode means the clock
source comes from 25MHz crystal/oscillator on pins X1/X2, and the 50MHz clock will be output from the SMxRXC pin
in RMII interface to be used, the 50MHz can be disabled by the register 87 bit 3 and bit 2 for SM4RXC and SM3RXC
if the reference clock is not used. For the detail RMII connection samples, please refer to the application note in the
design kit.
Advanced Functionality
QoS Priority Support
The KSZ8864RMN provides Quality of Service (QoS) for applications such as VoIP and video conferencing. The
KSZ8864RMN offer 1/2/4 priority queues option per port by setting the port registers xxx control 9 bit1 and the port
registers xxx control 0 bit0, the 1/2/4 queues split as follows:
[Port registers xxx control 9 bit1, control 0 bit0]=00 single output queue as default.
[Port registers xxx control 9 bit1, control 0 bit0]=01 egress port can be split into two priority transmit queues.
[Port registers xxx control 9 bit1, control 0 bit0]=10 egress port can be split into four priority transmit queues.
The four priority transmit queues is a new feature in the KSZ8864RMN. The queue 3 is the highest priority queue and
Queue 0 is the lowest priority queue. The port registers xxx control 9 bit1 and the port registers xxx control 0 bit0 are
used to enable split transmit queues for ports 1and 2, respectively. If a port's transmit queue is not split, high priority
and low priority packets have equal priority in the transmit queue.
There is an additional option to either always deliver high priority packets first or use programmable weighted fair
queuing for the four priority queues scale by the port registers control 10, 11, 12 and 13 (default value are 8, 4, 2, 1
by their bit[6:0].
Register 130 bit[7:6] Prio_2Q[1:0] is used when the 2 Queue configuration is selected, these bits are used to map the
2-bit result of IEEE 802.1p from the registers 128, 129 or TOS/DiffServ mapping from registers 144-159 (for four
Queues) into two queues mode with priority high or low.
Please see the descriptions of the register 130 bits [7:6] for details.
Port-Based Priority
With port-based priority, each ingress port is individually classified as a priority 0-3 receiving port. All packets
received at the priority 3 receiving port are marked as high priority and are sent to the high-priority transmit queue if
the corresponding transmit queue is split. The Port Registers Control 0 Bits [4:3] is used to enable port-based priority
for ports 1and 2, respectively.
802.1p-Based Priority
For 802.1p-based priority, the KSZ8864RMN 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 registers 128 and 129, both register 128/129 can map 3-bit priority field of 0-7 value to 2-bit
result of 0-3 priority levels. The “priority mapping” value is programmable.
Figure 6 illustrates how the 802.1p priority field is embedded in the 802.1Q VLAN tag.
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Figure 6. 802.1p Priority Field Format
802.1p-based priority is enabled by bit [5] of the port registers control 0 for Ports 1 and 2, respectively.
The KSZ8864RMN 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-byte Tag Control Information
field (TCI), is also referred to as the IEEE 802.1Q VLAN tag.
Tag Insertion is enabled by bit [2] of the port registers control 0 and the port register control 8 to select which source
port (ingress port) PVID can be inserted on the egress port for Ports 1, 2, 3 and 4, respectively. At the egress port,
untagged packets are tagged with the ingress port’s default tag. The default tags are programmed in the port
registers control 3 and control 4 for ports 1,2,3 and 4, respectively. The KSZ8864RMN will not add tags to already
tagged packets.
Tag Removal is enabled by bit [1] of the port registers control 0 for Ports 1, 2, 3 and 4, respectively. At the egress
port, tagged packets will have their 802.1Q VLAN Tags removed. The KSZ8864RMN 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 KSZ8864RMN to set the “User Priority Ceiling” at
any ingress port by the port register control 2 bit 7. 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.
DiffServ-Based Priority
DiffServ-based priority uses the ToS registers (registers 144 to 159) in the Advanced 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 of DSCP decoded is compared with the corresponding bits in
the DSCP register to determine priority.
Spanning Tree Support
Port 4 is the designated port for spanning tree support.
The other ports (Port 1 – Port 3) can be configured in one of the five spanning tree states via “transmit enable,”
“receive enable,” and “learning disable” register settings in Registers 34, 50 for Ports 1, 2 and 3, respectively. The
following description shows the port setting and software actions taken for each of the five spanning tree states.
Disable state: the port should not forward or receive any packets. Learning is disabled.
Port setting: "transmit enable = 0, receive enable = 0, learning disable = 1."
Software action: 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 table with “overriding bit” set) and the processor should
discard those packets. Note: processor is connected to Port 4 through MAC4 SW4-MII/RMII interface. Address
learning is disabled on the port in this state.
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Blocking state: only packets to the processor are forwarded. Learning is disabled.
Port setting: "transmit enable = 0, receive enable = 0, learning disable = 1"
Software action: 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 (e.g., 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: only packets to and from the processor are forwarded. Learning is disabled.
Port setting: "transmit enable = 0, receive enable = 0, learning disable = 1.
"Software action: The processor should program the static MAC table with the entries that it needs to receive (e.g.,
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, see the “Tail Tagging Mode” section for
details. Address learning is disabled on the port in this state.
Learning state: only packets to and from the processor are forwarded. Learning is enabled.
Port setting: “transmit enable = 0, receive enable = 0, learning disable = 0.”
Software action: The processor should program the static MAC table with the entries that it needs to receive (e.g.,
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, see the “Tail Tagging Mode” section for
details. Address learning is enabled on the port in this state.
Forwarding state: packets are forwarded and received normally. Learning is enabled.
Port setting: “transmit enable = 1, receive enable = 1, learning disable = 0.”
Software action: The processor should program the static MAC table with the entries that it needs to receive (e.g.,
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, see “Tail Tagging Mode” section for details.
Address learning is enabled on the port in this state.
Rapid Spanning Tree Support
There are three operational states of the Discarding, Learning, and Forwarding assigned to each port for RSTP:
Discarding ports Do not participate in the active topology and Do not learn MAC addresses.
Discarding state: the state includs three states of the disable, blocking and listening of STP.
Port setting: "transmit enable = 0, receive enable = 0, learning disable = 1."
Software action: 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 table with “overriding bit” set) and the processor should
discard those packets. When disable the port’s learning capability (learning disable=’1’), set the register 1 bit5 and
bit4 will flush rapidly with the port related entries in the dynamic MAC table and static MAC table.
Note: processor is connected to Port 4 MAC 4 SW4-MII/RMII interface. Address learning is disabled on the port in
this state.
Ports in Learning states learn MAC addresses, but Do not forward user traffic.
Learning state: only packets to and from the processor are forwarded. Learning is enabled.
Port setting: “transmit enable = 0, receive enable = 0, learning disable = 0.”
Software action: The processor should program the static MAC table with the entries that it needs to receive (e.g.,
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, see “Tail Tagging Mode” section for details.
Address learning is enabled on the port in this state.
Ports in Forwarding states fully participate in both data forwarding and MAC learning.
Forwarding state: packets are forwarded and received normally. Learning is enabled.
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Port setting: “transmit enable = 1, receive enable = 1, learning disable = 0.”
Software action: The processor should program the static MAC table with the entries that it needs to receive (e.g.,
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, see “Tail Tagging Mode” section for details.
Address learning is enabled on the port in this state.
RSTP uses only one type of BPDU called RSTP BPDUs. They are similar to STP Configuration BPDUs with the
exception of a type field set to “version 2” for RSTP and “version 0” for STP, and a flag field carrying additional
information.
Tail Tagging Mode
The Tail Tag is only seen and used by the Port 4 interface, which should be connected to a processor by MAC 4
SW4-MII/RMII interface. The one byte tail tagging is used to indicate the source/destination port in Port 4. Only bit
[31] are used for the destination in the tail tagging byte. Bit 0 is not used. The Tail Tag feature is enabled by setting
register 12 bit 1.
Figure 7. Tail Tag Frame Format
Ingress to Port 4 (Host
KSZ8864RMN)
Bit [3:1]
Destination
0,0,0
Normal (Address Look up for destination)
0,0,1
Port 1 (direct forward to port1)
0,1,0
Port 2 (direct forward to port2)
1,0,0
Port 3 (direct forward to port3)
1,1,1
Port 1,2 and 3 (direct forward to port 1,2,3)
Bit [7:4]
0,0,0,0
Queue 0 is used at destination port
0,0,0,1
Queue 1 is used at destination port
0,0,1,0
Queue 2 is used at destination port
0,0,1,1
Queue 3 is used at destination port
x, 1,x,x
Whatever send packets to specified port in bit[3:1]
1, x,x,x
Bit[6:0] will be ignored
Egress from Port 4 (KSZ8864RMN
Host )
Bit [1:0]
Source
0,0
Reserved
0,1
Port 1 (packets from port 1)
1,0
Port 2 (packets from port 2)
1,1
Port 3 (packets from port 3)
Table 5. Tail Tag Rules
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IGMP Support
There are two parts involved to support the Internet Group Management Protocol (IGMP) in Layer 2. The first part is
IGMP snooping, the second part is this IGMP packet to be sent back to the subscribed port. Describe them as
follows.
IGMP Snooping
The KSZ8864RMN traps IGMP packets and forwards them only to the processor (Port 4 SW4-MII/RMII). 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. Set register 5 bit [6] to ‘1’ to enable IGMP snooping.
IGMP Send Back to the Subscribed Port
Once the host responds the received IGMP packet, the host should knows the original IGMP ingress port and
send back the IGMP packet to this port only, otherwise this IGMP packet will be broadcasted to all port to
downgrade the performance.
Enable the tail tag mode, the host will know the IGMP packet received port from tail tag bits [1:0] and can send
back the response IGMP packet to this subscribed port by setting the bits [3:1] in the tail tag. Enable “Tail tag
mode” by setting Register 12 bit 1.
Port Mirroring Support
KSZ8864RMN supports “port mirror” comprehensively as:
“Receive Only” Mirror on a Port
All the packets received on the port will be mirrored on the sniffer port. For example, Port 1 is programmed to be
“rx sniff,” and Port 2 is programmed to be the “sniffer port.” A packet, received on Port 1, is destined to Port 3
after the internal look-up. The KSZ8864RMN will forward the packet to both Port 2 and Port 3. KSZ8864RMN can
optionally forward even “bad” received packets to Port 3.
“Transmit Only” Mirror on a Port
All the packets transmitted on the port will be mirrored on the sniffer port. For example, Port 1 is programmed to
be “tx sniff,” and Port 2 is programmed to be the “sniffer port.” A packet, received on any of the ports, is destined
to port 1 after the internal look-up. The KSZ8864RMN will forward the packet to both Ports 1 and 2.
“Receive and Transmit” Mirror on a Port
All the packets received on port A AND transmitted on port B will be mirrored on the sniffer port. To turn on the
“AND” feature, set Register 5 bit 0 to 1. For example, Port 1 is programmed to be “rx sniff and tx sniff,” and Port 2
is programmed to be the “sniffer port.” A packet, received and transmit on port 1. The KSZ8864RMN will monitor
port 1 packets on Port 2.
Multiple ports can be selected to be “rx sniffed” or “tx sniffed.” And any port can be selected to be the “sniffer port.”
All these per port features can be selected through Register 17.
VLAN Support
KSZ8864RMN supports 128 active VLANs and 4096 possible VIDs specified in IEEE 802.1q. The KSZ8864RMN
provides a 128-entry VLAN table, which correspond to 4096 possible VIDs and converts to FID (7 bits) for address
look-up maximum of 128 active VLANs. If a non-tagged or null-VID-tagged packet is received, the ingress port VID is
used for look-up when 802.1q is enabled by the global register 5 control 3 bit 7. In the VLAN mode, the look-up
process starts from VLAN table look-up to determine whether the VID is valid. If the VID is not valid, the packet will
be dropped and its address will not be learned. If the VID is valid, then FID is retrieved for further look-up by the
static MAC table or dynamic MAC table. FID+DA is used to determine the destination port. The followed table
describles the difference actions at different situstions of DA and FID+DA in the static MAC table and dynamic MAC
table after the VLAN table finish a look-up action. FID+SA is used for learning purposes. Table 6 also describles how
to learning in the dynamic MAC table when VLAN table has done a look-up and the static MAC table without a valid
entry.
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DA Found in
Static MAC Table
USE FID
Flag?
FID Match?
DA+FID Found in
Dynamic MAC
Table
No
Do not Care
Do not Care
No
Broadcast to the membership ports defined in
the VLAN table bit [11:7].
No
Do not Care
Do not Care
Yes
Send to the destination port defined in the
dynamic MAC table bit [57:55].
Yes
0
Do not Care
Do not Care
Send to the destination port(s) defined in the
static MAC table bit [52:48].
Yes
1
No
No
Broadcast to the membership ports defined in
the VLAN table bit [11:7].
Yes
1
No
Yes
Send to the destination port defined in the
dynamic MAC table bit [57:55].
Yes
1
Yes
Do not Care
Action
Send to the destination port(s) defined in the
static MAC table bit [52:48].
Table 6. FID+DA Look-Up in the VLAN Mode
SA+FID Found in
Dynamic MAC Table
Action
No
The SA+FID will be learned into the dynamic table.
Yes
Time stamp will be updated.
Table 7. FID+SA Look-Up in the VLAN Mode
Advanced VLAN features are also supported in KSZ8864RMN, such as “VLAN ingress filtering” and “discard non
PVID” defined in bits [6:5] of the port Register Control 2. These features can be controlled on a port basis.
Rate Limiting Support
The KSZ8864RMN provides a fine resolution hardware rate limiting. The rate step is 64Kbps when the rate limit is
less than 1Mbps rate for 100BT or 10BT. The rate step is 1Mbps when the rate limit is more than 1Mbps rate for
100BT or 10BT (refer to Data Rate Selection Table which follow the end of the Port Register Queue 03
Ingress/Egress Limit Control section). The rate limit is independently on the “receive side” and on the “transmit side”
on a per port basis. For 10BASE-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 Preamble byte,
in addition to the data field (from packet DA to FCS).
Ingress Rate Limit
For ingress rate limiting, KSZ8864RMN provides options to selectively choose frames from all types, multicast,
broadcast, and flooded unicast frames by bits [32] of the port rate limit control register. The KSZ8864RMN 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 or when the flow control takes effect without packet dropped. This occurs when the
ingress rate limit flow control is enabled by the port rate limit control register bit 4. The ingress rate limiting supports
the port-based, 802.1p and DiffServ-based priorities, the port-based priority is fixed priority 03 selection by bits [43]
of the port register control 0. The 802.1p and DiffServ-based priority can be mapped to priority 03 by default of the
register 128 and 129. In the ingress rate limit, set register 135 global control 19 bit3 in order for the queue-based rate
limit to be enabled if use two queues or four queues mode, all related ingress ports and egress port should be split
into two or four queues mode by the port registers control 9 and control 0. The four queues mode will use Q0Q3 for
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priority 03 by bit [6-0] of the port register ingress limit control 14. The two queues mode will use Q0Q1 for priority
01by bit [60] of the port register ingress limit control 12. The priority levels in the packets of the 802.1p and
DiffServ can be programmed to priority 0-3 by the register 128 and 129 for a re-mapping.
Egress 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 by the data rate selection table followed the egress
rate limit control registers.
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. The egress rate limiting
supports the port-based, 802.1p and DiffServ-based priorities, the port-based priority is fixed priority 03 selection by
bits [43] of the port register control 0. The 802.1p and DiffServ-based priority can be mapped to priority 03 by
default of the register 128 and 129. In the egress rate limit, set register 135 global control 19 bit3 for queue-based
rate limit to be enabled if using two queues or four queues mode. All related ingress ports and egress port should be
split into two or four queues mode by the port registers control 9 and control 0. The four queues mode will use Q0-Q3
for priority 0-3 by bit [6-0] of the port register egress limit control 14. The two queues mode will use Q0Q1 for
priority 01by bit [60] of the port register egress limit control 12. The priority levels in the packets of the 802.1p and
DiffServ can be programmed to priority 03 by the register 128 and 129 for a re-mapping.
With egress rate limit just use one queue per port for the egress port rate limit, the priority packets will be based on
the data rate selection table with the rate limit exact number. If egress rate limit use more than one queue per port for
the egress port rate limit, the highest priority packets will be based on the data rate selection table for the rate limit
exact number and other lower priority packet rate will be limited based on 8:4:2:1 (default) priority ratio based on the
highest priority rate. The transmit queue priority ratio is programmable.
To reduce congestion, it is a good practice to make sure the egress bandwidth exceeds the ingress bandwidth.
Transmit Queue Ratio Programming
In transmit queues 0-3 of the egress port, the default priority ratio is 8:4:2:1, the priority ratio can be programmed by
the port registers control 10, 11, 12 and 13. When the transmit rate exceed the ratio limit in the transmit queue, the
transmit rate will be limited by the transmit queue 0-3 ratio of the port register control 10, 11, 12 and 13. The highest
priority queue will be no limited, other lower priority queues will be limited based on the transmit queue ratio.
Filtering for Self-Address, Unknown Unicast/Multicast Address and Unknown VID Packet/IP Multicast
Enable Self-address filtering, the unknown unicast packet filtering and forwarding by the Register 131 Global Control
15. Enable Unknown multicast packet filtering and forwarding by the Register 132 Global Control 16.
Enable Unknown VID packet filtering and forwarding by the Register 133 Global Control 17.
Enable Unknown IP multicast packet filtering and forwarding by the Register 134 Global Control 18.
This function is very useful in preventing those kinds of packets that could degrade the quality of the port in
applications such as voice over Internet Protocol (VoIP) and the daisy chain connection to prevent packets into
endless loop.
Configuration Interface
I2C Master Serial Bus Configuration
If a 2-wire EEPROM exists, the KSZ8864RMN can perform more advanced features like broadcast storm protection
and rate control. The EEPROM should have the entire valid configuration data from Register 0 to Register 255
defined in the “Memory Map,” except the status registers and indirect registers. After reset, the KSZ8864RMN will
start to read all control registers sequentially from the EEPROM. The configuration access time (tprgm) is less than
30ms, as shown in Figure 12.
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Figure 8. KSZ8864RMN EEPROM Configuration Timing Diagram
To configure the KSZ8864RMN with a pre-configured EEPROM use the following steps:
1. At the board level, connect pin 56 on the KSZ8864RMN to the SCL pin on the EEPROM. Connect pin 57 on the
KSZ8864RMN to the SDA pin on the EEPROM.
2. Set the input signals PS[1:0] (pins 59 and 60, respectively) to “00.” This puts the KSZ8864RMN serial bus
configuration into I2C master mode.
3. Be sure the board-level reset signal is connected to the KSZ8864RMN reset signal on pin 61 (RST_N).
4. Program the contents of the EEPROM before placing it on the board with the desired configuration data. Note
that the first byte in the EEPROM must be “95” and the register1 chip ID bit[7-4] = 0 for the loading to occur
properly. If this value is not correct, all other data will be ignored.
5. Place EEPROM on the board and power up the board. Assert the active-low board level reset to RST_N on the
KSZ8864RMN. After the reset is de-asserted, the KSZ8864RMN will begin reading configuration data from the
EEPROM. The configuration access time (tprgm) is less than 30ms.
SPI Slave Serial Bus Configuration
The KSZ8864RMN can also act as an SPI slave device. Through the SPI, the entire feature set can be enabled,
including “VLAN,” “IGMP snooping,” “MIB counters,” etc. The external master device can access any register from
Register 0 to Register 127 randomly. The system should configure all the desired settings before enabling the switch
in the KSZ8864RMN. To enable the switch, write a "1" to Register 1 bit 0.
Two standard SPI commands are supported (00000011 for “READ DATA,” and 00000010 for “WRITE DATA”). To
speed configuration time, the KSZ8864RMN also supports multiple reads or writes. After a byte is written to or read
from the KSZ8864RMN, the internal address counter automatically increments if the SPI Slave Select Signal
(SPIS_N) continues to be driven low. If SPIS_N is kept low after the first byte is read, the next byte at the next
address will be shifted out on SPIQ. If SPIS_N is kept low after the first byte is written, bits on the Master Out Slave
Input (SPID) line will be written to the next address. Asserting SPIS_N high terminates a read or write operation. This
means that the SPIS_N signal must be asserted high and then low again before issuing another command and
address. The address counter wraps back to zero once it reaches the highest address. Therefore the entire register
set can be written to or read from by issuing a single command and address.
The default SPI clock speed is 12.5MHz. The KSZ8864RMN is able to support a SPI bus up to 25MHz (set register
12 bit [5:4]=0x10). A high performance SPI master is recommended to prevent internal counter overflow.
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To use the KSZ8864RMN SPI:
1. At the board level, connect KSZ8864RMN pins as follows:
KSZ8864RMN Pin
Number
KSZ8864RMN Signal
Name
58
SPIS_N
56
SCL
57
SPID/SDA
Master Out Slave Input
55
SPIQ
Master In Slave Output
Microprocessor Signal Description
SPI Slave Select
SPI Clock
Table 8. SPI Connections
2. Set the input signals PS[1:0] (pins 59 and 60, respectively) to “10” to set the serial configuration to SPI slave
mode.
3. Power up the board and assert a reset signal. After reset wait 100µs, the start switch bit in Register 1 will be set
to ‘0’. Configure the desired settings in the KSZ8864RMN before setting the start register to ‘1.'
4. Write configuration to registers using a typical SPI write data cycle as shown in Figure 9 or SPI multiple write as
shown in Figure 11. Note that data input on SPID is registered on the rising edge of SPIC.
5. Registers can be read and configuration can be verified with a typical SPI read data cycle as shown in Figure 10
or a multiple read as shown in Figure 12. Note that read data is registered out of SPIQ on the falling edge of
SPIC.
6. After configuration is written and verified, write a ‘1’ to Register 1 bit 0 to begin KSZ8864RMN switch operation.
Figure 9. SPI Write Data Cycle
Figure 10. SPI Read Data Cycle
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Figure 11. SPI Multiple Write
Figure 12. SPI Multiple Read
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MII Management Interface (MIIM)
The KSZ8864RMN supports the standard IEEE 802.3 MII Management Interface, also known as the Management
Data Input/Output (MDIO) Interface. This interface allows upper-layer devices to monitor and control the states of the
KSZ8864RMN. An external device with MDC/MDIO capability is used to read the PHY status or configure the PHY
settings. Further detail on the MIIM interface is found in Clause 22.2.4.5 of the IEEE 802.3u Specification.
The MIIM interface consists of the following:
A physical connection that incorporates the data line (pin 54 MDIO) and the clock line (pin 53 MDC).
A specific protocol that operates across the aforementioned physical connection that allows an external
controller to communicate with the KSZ8864RMN device.
Access to a set of eight 16-bit registers, consisting of 8 standard MIIM registers [0:5h], 1d and 1f MIIM
registers per port.
The MIIM Interface can operate up to a maximum clock speed of 10MHz MDC clock.
Table 9 depicts the MII Management Interface frame format.
Preamble
Start of Frame
Read/Write
OP Code
PHY
Address
Bits [4:0]
REG
Address
Bits [4:0]
TA
Data Bits [15:0]
Idle
Read
32 1’s
01
10
AAAAA
RRRRR
Z0
DDDDDDDD_DDDDDDDD
Z
Write
32 1’s
01
01
AAAAA
RRRRR
10
DDDDDDDD_DDDDDDDD
Z
Table 9. MII Management Interface Frame Format
The MIIM interface does not have access to all the configuration registers in the KSZ8864RMN. It can only access
the standard MIIM registers. See “MIIM Registers”. The SPI interface and MDC/MDIO SMI mode, on the other hand,
can be used to access the entire KSZ8864RMN feature set.
Serial Management Interface (SMI)
The SMI is the KSZ8864RMN non-standard MIIM interface that provides access to all KSZ8864RMN configuration
registers. This interface allows an external device with MDC/MDIO interface to completely monitor and control the
states of the KSZ8864RMN.
The SMI interface consists of the following:
A physical connection that incorporates the data line (MDIO) and the clock line (MDC).
A specific protocol that operates across the aforementioned physical connection that allows an external controller to
communicate with the KSZ8864RMN device.
Access all KSZ8864RMN configuration registers. Register access includes the Global, Port and Advanced Control
Registers 0-255 (0x00 – 0xFF), and indirect access to the standard MIIM registers [0:5] and custom MIIM registers
[29, 31].
The SMI Interface can operate up to a maximum clock speed of 10MHz MDC clock.
Table 10 depicts the SMI frame format.
Preamble
Start of Frame
Read/Write
OP Code
PHY
Address
Bits [4:0]
REG
Address
Bits [4:0]
TA
Data
Bits [15:0]
Idle
Read
32 1’s
01
10
RR11R
RRRRR
Z0
0000_0000_DDDD_DDDD
Z
Write
32 1’s
01
01
RR11R
RRRRR
10
xxxx_xxxx_DDDD_DDDD
Z
Table 10. Serial Management Interface (SMI) Frame Format
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SMI register Read access is selected when OP Code is set to “10” and bits [2:1] of the PHY address is set to ‘11’.
The 8-bit register address is the concatenation of {PHY address bits [4:3], PHY address bits [0], REG address bit
[4:0]}. TA is turn-around bits. TA bits [1:0] are ’Z0’ means the processor MDIO pin is changed to input Hi-Z from
output mode and the followed ‘0’ is the read response from device, as the switch configuration registers are 8-bit
wide, only the lower 8 bits of data bits [15:0] are used
SMI register Write access is selected when OP Code is set to “01” and bits [2:1] of the PHY address is set to ‘11’.
The 8-bit register address is the concatenation of {PHY address bits [4:3], PHY address bits [0], REG address bit
[4:0]}. TA bits [1:0] are set to ’10’, as the switch configuration registers are 8-bit wide, only the lower 8 bits of data bits
[15:0] are used.
To access the KSZ8864RMN registers 0-255 (0x00 – 0xFF), the following applies:
PHYAD [4, 3, 0] and REGAD [4:0] are concatenated to form the 8-bit address; that is, {PHYAD [4,3,0], REGAD[4:0]}
= bits [7:0] of the 8-bit address.
Registers are eight data bits wide. For read operation, data bits [15:8] are read back as 0’s. For write operation, data
bits [15:8] are not defined, and hence can be set to either 0s or 1s.
SMI register access is the same as the MIIM register access, except for the register access requirements presented
in this section.
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Register Description
Offset
Decimal
Hex
Description
0-1
0x00-0x01
Chip ID Registers
2-13
0x02-0x0D
Global Control Registers
14-15
0x0E-0x0F
Power Down Management Control Registers
16-20
0x10-0x14
Reserved
21-23
0x15-0x17
Reserved (Factory Test Registers)
24-31
0x18-0x1F
Reserved
32-36
0x20-0x24
Port 1 Control Registers
37-39
0x25-0x27
Port 1 Reserved (Factory Test Registers)
40-47
0x28-0x2F
Port 1 Control/Status Registers
48-52
0x30-0x34
Port 2 Control Registers
53-55
0x35-0x37
Port 2 Reserved (Factory Test Registers)
56-63
0x38-0x3F
Port 2 Control/Status Registers
64-68
0x40-0x44
Reserved
69-71
0x45-0x47
Reserved (Factory Test Registers)
72-79
0x48-0x4F
Reserved
80-84
0x50-0x54
Reserved
85-87
0x55-0x57
Reserved (Factory Test Registers)
88-95
0x58-0x5F
Reserved
96-103
0x60-0x67
Reserved (Factory Testing Registers)
104-109
0x68-0x6D
MAC Address Registers
110-111
0x6E-0x6F
Indirect Access Control Registers
112-120
0x70-0x78
Indirect Data Registers
121-123
0x79-0x7B
Reserved (Factory Testing Registers)
124-125
0x7C-0x7D
Port Interrupt Registers
126-127
0x7E-0x7F
Reserved (Factory Testing Registers)
128-135
0x80-0x87
Global Control Registers
136
0x88
Switch Self Test Control Register
137-143
0x89-0x8F
QM Global Control Registers
144-145
0x90-0x91
TOS Priority Control Registers
146-159
0x92-0x9F
TOS Priority Control Registers
160-175
0xA0-0xAF
Reserved (Factory Testing Registers)
176-190
0xB0-0xBE
Reserved
191
September 2011
0xBF
Reserved (Factory Testing Register)
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KSZ8864RMN
Offset
Decimal
192-206
Hex
0xC0-0xCE
207
208-222
0xCF
0xD0-0xDE
223
224-238
0xDF
0xE0-0xEE
239
240-254
Description
0xEF
0xF0-0xFE
255
September 2011
0xFF
Port 1 Control Registers
Reserved (Factory Testing Register)
Port 2 Control Registers
Reserved (Factory Testing Register)
Port 3 Control Registers
Reserved (Factory Testing Register)
Port 4 Control Registers
Reserved (Factory Testing Register)
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KSZ8864RMN
Global Registers
Address
Name
Description
Mode
Default
Chip family.
RO
0x95
RO
0100
RO
0x0
Register 0 (0x00): Chip ID0
7-0
family ID
Register 1 (0x01): Revision ID / Start Switch
7-4
Reserved
3-1
Revision ID
Reserved (Chip ID to see register 254 bit7)
Note: Port4 RMII mode will be 0110.
Revision ID
1, start the chip when external pins (PS1, PS0) = (1,0)
Note: in (PS1,PS0) = (0,0) mode, the chip will
start automatically, after trying to read the external
EEPROM. If EEPROM does not exist, the chip will use
default values for all internal registers. If EEPROM is
present, the contents in the EEPROM will be checked.
The switch will check:
0
Start Switch
(1) Register 0 = 0x95,
(2) Register 1 [7:4] = Availible chip ID.
R/W
0
If this check is OK, the contents in the EEPROM will
override chip register default values =0, chip will not
start when external pins
(PS1, PS0) = (1,0) or (0,1).
Note: (PS1, PS0) = (1,1) for Factory test only.
0, stop the switch function of the chip
Register 2 (0x02): Global Control 0
New Back-off algorithm designed for UNH
7
New Back-off Enable
1 = Enable
R/W
0
RO
0
0 = Disable
6
Reserved
Reserved.
Flush the entire dynamic MAC table for RSTP
1 = Trigger the flush dynamic MAC table operation.
This bit is self clear
5
Flush dynamic MAC table
September 2011
0 = normal operation
R/W
Note: All the entries associated with a port that has its
learning capability being turned off (Learning Disable)
will be flushed. If you want to flush the entire Table, all
ports learning capability must be turned off.
(SC)
50
0
M9999-092011-1.4
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Address
KSZ8864RMN
Name
Description
Mode
Default
Flush the matched entries in static MAC table for
RSTP
1 = Trigger the flush static MAC table operation. This
bit is self clear
4
Flush static MAC table
3
Reserved
2
Reserved
0 = normal operation
R/W
Note: The matched entry is defined as the entry whose
Forwarding Ports field contains a single port and MAC
address with unicast. This port, in turn, has its learning
capability being turned off (Learning Disable). Per port,
multiple entries can be qualified as matched entries.
(SC)
N/A Do not change.
RO
1
N/A Do not change.
RO
1
R/W
0
R/W
0
R/W
0
R/W
0
0
1, the switch will drop packets with 0x8808 in T/L filed,
or DA=01-80-C2-00-00-01.
1
0
UNH Mode
Link Change Age
0, the switch will drop packets qualified as “flow
control” packets.
1, link change from “link” to “no link” will cause fast
aging (<800µs) 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.
Register 3 (0x03): Global Control 1
7
Pass All Frames
1, switch all packets including bad ones. Used solely
for debugging purpose. Works in conjunction with
sniffer mode.
1 = enable support 2K Byte packet
6
2K Byte packet support
0 = disable support 2K Byte packet
0
Pin SM3RXD3
strap option.
0, will enable transmit flow control based on AN result.
5
IEEE 802.3x Transmit
Flow Control Disable
1, will not enable transmit flow control regardless of
AN result.
R/W
PD(0): Enable Tx
flow control
(default).
PU(1): Disable
Tx/Rx flow
control.
Note: SM3RXD3
has internal pulldown.
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Address
KSZ8864RMN
Name
Description
Mode
Default
0
Pin SM3RXD3
strap option.
0, will enable receive flow control based on AN result.
PD (0): Enable
Rx flow control
(default).
1, will not enable receive flow control regardless of
4
IEEE 802.3x Receive
AN result.
Flow Control Disable
Note: Bit 5 and bit 4 default values are controlled by
PU(1): Disable
Tx/Rx flow
the same pin, but they can be programmed
independently.
control.
R/W
Note: SM3RXD3
has internal pulldown.
1, will check frame length field in the IEEE packets
3
Frame Length Field Check
If the actual length does not match, the packet will be
R/W
0
R/W
1
R/W
0
dropped (for L/T <1500) .
2
Aging Enable
1
fast age Enable
1, Enable age function in the chip.
0, Disable aging function.
1 = Turn on fast age (800µs).
0
Pin SM3RXD0
strap option.
0
Aggressive Back Off
Enable
1 = Enable more aggressive back-off algorithm in half
duplex mode to enhance performance. This is not an
IEEE standard.
R/W
PD(0): Disable
aggressive back
off (default).
PU(1):
Aggressive back
off.
Note: SM3RXD0
has internal pull
down.
Register 4 (0x04): Global Control 2
7
6
Unicast Port-VLAN
Mismatch Discard
Multicast Storm Protection
Disable
This feature is used for port VLAN (described in
Register 17, Register 33...).
1, all packets can not cross VLAN boundary.
R/W
1
R/W
1
R/W
1
0, unicast packets (excluding unknown/
multicast/broadcast) can cross VLAN boundary.
1, “Broadcast Storm Protection” does not include
multicast packets. Only DA=FFFFFFFFFFFF packets
will be regulated.
0, “Broadcast Storm Protection” includes
DA = FFFFFFFFFFFF and DA[40] = 1 packets.
5
Back Pressure Mode
September 2011
1, carrier sense based backpressure is selected.
0, collision based backpressure is selected.
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Address
4
KSZ8864RMN
Name
Description
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 is to prevent the flow control
port from being flow controlled for an extended period
of time.
Mode
Default
R/W
1
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 will be flow controlled. This may not be
“fair” to the flow control port.
0
Pin SM3RXD1
strap option.
3
2
No Excessive
Collision Drop
Huge Packet Support
1, the switch will not drop packets when 16 or more
collisions occur.
0, the switch will drop packets when 16 or more
collisions occur.
1, will accept packet sizes up to 1916 bytes (inclusive).
This bit setting will override setting from bit 1 of the
same register.
0, the max packet size will be determined by bit 1 of
this register.
R/W
R/W
PD(0): (default )
Drop excessive
collision packets.
PU(1): Do not
drop excessive
collision packets.
Note: SM3RXD1
has internal pull
down.
0
1, will accept packet sizes up to 1536 bytes (inclusive).
1
0
Legal Maximum Packet
Size Check Disable
Reserved
0, 1522 bytes for tagged packets (not including
packets with STPID from CPU to ports 1-4), 1518
bytes for untagged packets. Any packets larger than
the specified value will be dropped.
R/W
N/A
RO
0
1, 802.1q VLAN mode is turned on. VLAN table needs
to set up before the operation.
R/W
0
R/W
0
R/W
0
0
Register 5 (0x05): Global Control 3
7
802.1q VLAN Enable
0, 802.1q VLAN is disabled.
6
IGMP Snoop Enable on
1, IGMP snoop enabled. All the IGMP packets will be
forwarded to Switch MII port.
Switch SW4-MII Interface
0, IGMP snoop disabled.
1, direct mode on Port 4. This is a special mode for the
5
Enable Direct Mode on
Switch SW4-MII Interface
Switch MII interface. Using preamble before MRXDV
to direct switch to forward packets, bypassing internal
look-up.
0, normal operation.
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Address
KSZ8864RMN
Name
Description
Mode
Default
R/W
0
RO
00
R/W
0
R/W
0
R/W
0
1, packets forwarded to Switch MII interface will be
4
Enable Pre-Tag on
pre-tagged with the source port number (preamble
Switch SW4-MII Interface
before MRXDV).
0, normal operation.
3-2
Reserved
N/A
1, the last 5 digits in the VID field are used as a mask
to determine which port(s) the packet should be
forwarded to.
1
Enable “Tag” Mask
0, no tag masks.
Note: you need to turn off the 802.1q VLAN mode
(reg0x5, bit 7 = 0) for this bit to work.
1, will do Rx AND Tx sniff (both source port and
destination port need to match).
0
Sniff Mode Select
0, will do Rx OR Tx sniff (Either source port or
destination port needs to match).
This is the mode used to implement Rx only sniff.
Register 6 (0x06): Global Control 4
7
Switch SW4-MII/RMII
Back Pressure Enable
1, enable half-duplex back pressure on switch
MII/RMII interface.
0, disable back pressure on switch MII/RMII interface.
0
Pin SM4RXD2
strap option.
PD(0): (default)
Full-duplex
mode.
6
Switch SW4-MII/RMII
Half-Duplex Mode
September 2011
1, enable MII/RMII interface half-duplex mode.
0, enable MII/RMII interface full-duplex mode.
54
R/W
PU(1): Halfduplex mode.
Note: SMRXD2
has internal pulldown.
M9999-092011-1.4
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Address
KSZ8864RMN
Name
Description
Mode
Default
0
Pin SM4RXD3
strap option.
5
Switch SW4-MII/RMII
Flow Control Enable
1, enable full-duplex flow control on switch MII/RMII
interface.
0, disable full-duplex flow control on switch MII/RMII
interface.
R/W
PD(0): (default)
Disable flow
control.
PU(1): enable
flow control.
Note: SMRXD3
has internal pulldown.
0
Pin SM4RXD1
strap option.
4
Switch SW4-MII/RMII
Speed
1, the switch SW4-MII/RMII is in 10Mbps mode.
0, the switch SW4-MII/RMII is in 100Mbps mode
R/W
PD(0): (default)
Enable 100Mbps.
PU(1): Enable
10Mbps.
Note: SMRXD1
has internal pulldown.
3
Null VID Replacement
1, will replace null VID with port VID (12 bits).
R/W
0
R/W
000
R/W
0x4A(1)
N/A Do not change.
RO
0x00
N/A Do not change.
RO
0x4C
0, no replacement for null VID.
This along with the next register determines how many
2-0
Broadcast Storm
Protection Rate Bit [10:8]
“64 byte blocks” of packet data allowed on an input
port in a preset period. The period is 50ms for 100BT
or 500ms for 10BT. The default is 1%.
Register 7 (0x07): Global Control 5
7-0
Broadcast Storm
Protection Rate Bit [7:0]
This along with the previous register determines how
many “64 byte blocks” of packet data are allowed on an
input port in a preset period. The period is 50ms for
100BT or 500ms for 10BT. The default is 1%.
Register 8 (0x08): Global Control 6
7-0
Factory Testing
Register 9 (0x09): Global Control 7
7-0
Factory Testing
Note:
1.
148,800 frames/sec × 50ms/interval × 1% = 74 frames/interval (approx.) = 0x4A.
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Address
KSZ8864RMN
Name
Description
Mode
Default
Register 10 (0x0A): Global Control 8
7-0
Factory Testing
N/A Do not change
RO
0x00
R/W
0
R/W
0
Register 11 (0x0B): Global Control 9
7
Port 3 SW3-RMII
reference clock edge
select
Select the data sampling edge of Switch MAC3 SW3RMII reference clock:
1 = data sampling on negative edge of refclk
0 = data sampling on positive edge of refclk (default)
6
Port 4 SW4- RMII
reference clock edge
select
Select the data sampling edge of Switch MAC4 SW4RMII reference clock:
1 = data sampling on negative edge of refclk
0 = data sampling on positive edge of refclk (default)
5
Reserved
N/A Do not change.
RO
0
4
Reserved
N/A Do not change.
RO
0
3
PHY Power
Save
1 = disable PHY power save mode.
0 = enable PHY power save mode.
R/W
0
2
Reserved
N/A Do not change.
RO
0
0 = led mode 0.
1 = led mode 1.
1
LED Mode
0
Mode 0
Mode 1
PxLED1
Lnk/Act
100Lnk/Act
PxLED0
Speed
Fullduplex
R/W
Pin SM4RXD0 strap option. Pulldown(0): Enabled
led mode 0. Pullup(1): Enabled
led mode 1.
Note: SM4RXD0
has internal pulldown 0.
Select the SPI/SMI clock edge for sampling SPI/SMI
read data
0
SPI/SMI read sampling
clock edge select
1 = trigger by rising edge of SPI/SMI clock (for high
speed SPI about 25MHz and SMI about 10MHz)
R/W
0
0 = trigger by falling edge of SPI/SMI clock
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Address
KSZ8864RMN
Name
Description
Mode
Default
Register 12 (0x0C): Global Control 10
7
Reserved
Reserved
RO
1
1 = The device is in clock mode when use RMII
interface, 25 MHz Crystal clock input as clock source
for internal PLL. This internal PLL will provide the 50
MHz output on the pin SMRXC for RMII reference
clock (Default).
6
Satus of device with RMII
interface at clock mode or
normal mode, default is
clock mode with 25MHz
Crystal clock from pins
X1/X2
0 = The device is in normal mode when use SW4-RMII
interface and 50 MHz clock input from external clock
through pin SM4TXC as device’s clock source and
internal PLL clock source from this pin not from the
25MHz crystal.
0
Pin P1LED1
strap option.
RO
PD(0): Select
device at normal
mode when use
SW4-RMII and
accept 50MHz
clock from
external.
PU(1): (default)
The device is at
clock mode,
provide 50MHz
clock in RMII.
Note: P1LED1
has internal pullup.
Note: This bit is set by strap onption only. Write to this
bit has no effect on mode selection
Note: The normal mode is used in SW4-RMII interface
reference clock from external.
Select the internal clock speed for SPI, MDI interface:
00 = 41.67MHz (SPI up to 6.25MHz, MDC up to
6MHz)
5-4
CPU interface clock select
01 = 83.33MHz Default (SPI SCL up to 12.5MHz,
MDC up to 12MHz)
R/W
01
10 = 125MHz (for hign speed SPI about 25MHz)
11 = Reserved
3
Reserved
N/A Do not change.
RO
00
2
Reserved
N/A Do not change.
RO
1
R/W
0
R/W
0
RO
00000000
Tail Tag feature is applied for Port 4 only.
1
Tail Tag Enable
1 = Insert 1 Byte of data right before FCS
0 = Do not insert
0
Pass Flow Control Packet
1 = Switch will not filter 802.1x “flow control” packets
0 = Switch will filter 802.1x “flow control” packets
Register 13 (0x0D): Global Control 11
7-0
Factory Testing
N/A Do not change.
Register 14 (0x0E): Power Down Management Control 1
7
Reserved
N/A Do not change.
RO
0
6
Reserved
N/A Do not change.
RO
0
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Address
KSZ8864RMN
Name
Description
Mode
Default
Pll power down enable:
5
PLL Power Down
1 = Disable
0 = Enable
R/W
0
R/W
00
RO
000
R/W
01010000
PLL power down takes effect in Energy Detect mode
Power management mode:
00 = Normal mode (D0)
4-3
Power Management Mode
01 = Energy Detection mode (D2)
10 = soft Power Down mode (D3)
11 = Power Saving mode (D1)
2-0
Reserved
N/A Do not change.
Register 15 (0x0F): Power Down Management Control 2
7-0
Go_sleep_time[7:0]
September 2011
When the Energy Detect mode is on, this value is
used to control the minimum period that the no energy
event has to be detected consecutively before the
device enters the low power state. The unit is 20 ms.
The default of go_sleep time is 1.6 seconds (80Dec x
20ms).
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KSZ8864RMN
Port Registers
The following registers are used to enable features that are assigned on a per port basis. The register bit
assignments are the same for all ports, but the address for each port is different, as indicated.
Register 16 (0x10): Reserved
Register 32 (0x20): Port 1 Control 0
Register 48 (0x30): Port 2 Control 0
Register 64 (0x40): Port 3 Control 0
Register 80 (0x50): Port 4 Control 0
Address
Name
Description
Mode
Default
7
Broadcast Storm
Protection Enable
1, enable broadcast storm protection for ingress
packets on the port.
0, disable broadcast storm protection.
R/W
0
6
DiffServ Priority
Classification Enable
1, enable DiffServ priority classification for ingress
packets on port.
0, disable DiffServ function.
R/W
0
5
802.1p Priority
Classification Enable
1, enable 802.1p priority classification for ingress
packets on port.
0, disable 802.1p.
R/W
0
R/W
00
R/W
0
R/W
0
= 00, ingress packets on port will be
classified as priority 0 queue if “Diffserv” or “802.1p”
classification is not enabled or fails to classify.
= 01, ingress packets on port will be
classified as priority 1 queue if “Diffserv” or “802.1p”
classification is not enabled or fails to classify.
4-3
Port-Based Priority
Classification Enable
= 10, ingress packets on port will be
classified as priority 2 queue if “Diffserv” or “802.1p”
classification is not enabled or fails to classify.
= 11, ingress packets on port will be
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
1
Tag insertion
Tag Removal
1, when packets are output on the port, the switch will
add 802.1q tags to packets without 802.1q 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.
1, when packets are output on the port, the switch will
remove 802.1q tags from packets with 802.1q tags
when received. The switch will not modify packets
received without tags.
0, disable tag removal.
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Address
KSZ8864RMN
Name
Description
Mode
Default
R/W
0
Mode
Default
This bit0 in the register16/32/48/64/80 should be
combination with Register177/193/209/225/241 bit 1
for port 1-5 will select the split of 1/2/4 queues:
For port 1, [Register177 bit 1, Register16 bit 0] =
[11], Reserved
0
Two Queues Split Enable
[10], the port output queue is split into four priority
queues or if map 802.1p to priority 0-3 mode.
[01], the port output queue is split into two priority
queues or if map 802.1p to priority 0-3 mode.
[00], single output queue on the port. There is no
priority differentiation even though packets are
classified into high or low priority.
Register 17 (0x11): Reserved
Register 33 (0x21): Port 1 Control 1
Register 49 (0x31): Port 2 Control 1
Register 65 (0x41): Port 3 Control 1
Register 81 (0x51): Port 4 Control 1
Address
Name
Description
7
Sniffer Port
1, port is designated as sniffer port and will transmit
packets that are monitored.
0, port is a normal port.
R/W
0
6
Receive Sniff
1, all the packets received on the port will be marked
as “monitored packets” and forwarded to the
designated “sniffer port.”
0, no receive monitoring.
R/W
0
Transmit Sniff
1, all the packets transmitted on the port will be marked
as “monitored packets” and forwarded to the
designated “sniffer port.”
0, no transmit monitoring.
R/W
0
Port VLAN Membership
Define the port’s Port VLAN membership. Bit 4 stands
for port 4, bit 3 for port 3...bit 1 for port 1, bit 0 is
reserved. The port can only communicate within the
membership. A ‘1’ includes a port in the membership, a
‘0’ excludes a port from membership.
R/W
0x1f
5
4-0
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Register 18 (0x12): Reserved
Register 34 (0x22): Port 1 Control 2
Register 50 (0x32): Port 2 Control 2
Register 66 (0x42): Port 3 Control 2
Register 82 (0x52): Port 4 Control 2
Address
7
Name
Description
User Priority Ceiling
1, If 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 control 3.
Mode
Default
R/W
0
R/W
0
0
0, no replace packet’s priority filed with port default tag
priority filed of the port register control 3 bit [7:5].
6
Ingress VLAN Filtering.
1, the switch will discard packates whose VID port
membership in VLAN table bit[20:16] does not include
the ingress port.
0, no ingress VLAN filtering.
5
Discard Non-PVID
packets
1, the switch will discard packets whose VID does not
match ingress port default VID.
0, no packets will be discarded.
R/W
Force Flow Control
1, will always enable Rx and Tx flow control on the
port, regardless of AN result.
0, the flow control is enabled based on AN result
(Default)
R/W
4
0
0
Pin SM3RXD2
strap option.
3
Back Pressure Enable
1, enable port half-duplex back pressure.
0, disable port half-duplex back pressure.
R/W
Pull-down (0):
disable back
pressure.
Pull-up(1): enable
back pressure.
Note: SM3RXD2
has internal pulldown.
2
Transmit Enable
1, enable packet transmission on the port.
0, disable packet transmission on the port.
R/W
1
1
Receive Enable
1, enable packet reception on the port.
0, disable packet reception on the port.
R/W
1
0
Learning Disable
1, disable switch address learning capability.
0, enable switch address learning.
R/W
0
Note:
Bits 2-0 are used for spanning tree support. See “Spanning Tree Support” section.
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Register 19 (0x13): Reserved
Register 35 (0x23): Port 1 Control 3
Register 51 (0x33): Port 2 Control 3
Register 67 (0x43): Port 3 Control 3
Register 83 (0x53): Port 4 Control 3
Address
7-0
Name
Description
Default Tag [15:8]
Port’s default tag, containing:
7-5: user priority bits
4: CFI bit
3-0 : VID[11:8]
Mode
Default
R/W
0
Mode
Default
R/W
1
Register 20 (0x14): Reserved
Register 36 (0x24): Port 1 Control 4
Register 52 (0x34): Port 2 Control 4
Register 68 (0x44): Port 3 Control 4
Register 84 (0x54): Port 4 Control 4
Address
Name
Description
7-0
Default Tag [7:0]
Default port 1’s tag, containing:
7-0: VID[7:0]
Note:
Registers 35 and 36 (and those corresponding to other ports) serve 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 look up.
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KSZ8864RMN
Register 87 (0x57): RMII Management Control Register
Address
Name
7-4
Reserved
3
Port 4 MAC4 SW4-RMII
50MHz clock output
disable
Description
Disable the output of port 4 SW4-RMII 50 MHz output
clock on RXC pin when 50MHz clock is not being used
by the device and the 50MHz clock from external
oscillator or opposite device in RMII mode
Mode
Default
RO
0000
R/W
0
RO
000
Mode
Default
R/W
1
RO
0
RO
0
RO
0
RO
0
RO
0
RO
0
RO
0
1 = Disable clock output when RXC pin is not used in
RMII mode
0 = Enable clock output in RMII mode
2-0
Reserved
N/A Do not change
Register 25 (0x19): Reserved
Register 41 (0x29): Port 1 Status 0
Register 57 (0x39): Port 2 Status 0
Register 73 (0x49): Port 3 Status 0 for SPD/DPX
Register 89 (0x59): Port 4 Status 0 for SPD/DPX
Address
Name
7
Hp_mdix
6
Reserved
5
Polrvs
4
Transmit Flow Control
Enable
1 = Transmit flow control feature is active
3
Receive Flow Control
Enable
1 = Receive flow control feature is active
2
Operation Speed
1
Operation Duplex
0
Reserved
September 2011
Description
1 = HP Auto MDI/MDI-X mode
0 = Micrel Auto MDI/MDI-X mode
N/A Do not change
1 = Polarity is reversed
0 = Polarity is not reversed
0 = Transmit flow control feature is inactive
0 = Receive flow control feature is inactive
1 = Link speed is 100Mbps
0 = Link speed is 10Mbps
1 = Link duplex is full
0 = Link duplex is half
N/A Do not change
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KSZ8864RMN
Register 26 (0x1A): Reserved
Register 42 (0x2A): Port 1 PHY Special Control/Status
Register 58 (0x3A): Port 2 PHY Special Control/Status
Register 74 (0x4A): Reserved
Register 90 (0x5A): Reserved
Address
Name
Description
7-4
Reserved
N/A Do not change
3
Force_lnk
2
Pwrsave
1 = Force link pass
0 = Normal Operation
1 = Enable power saving
0 = Disable power saving
Mode
Default
RO
0000
R/W
0
R/W
0
R/W
0
RO
0
Mode
Default
RO
0x00
1 = Perform Remote loopback, loopback on port 1 as
follows:
Port 1 (reg. 26, bit 1 = ‘1’)
Start: RXP1/RXM1 (port 1)
1
Remote Loopback
Loopback: PMD/PMA of port 1’s PHY
End: TXP1/TXM1 (port 1)
Setting reg. 42, 58, 74, 90, bit 1 = ‘1’ will perform
remote loopback on port 2, 3, 4, 5.
0 = Normal Operation.
0
Reserved
N/A Do not change
Register 27 (0x1B): Reserved
Register 43 (0x2B): Reserved
Register 59 (0x3B): Reserved
Register 75 (0x4B): Reserved
Register 91 (0x5B): Reserved
Address
Name
Description
7-0
Reserved
N/A Do not change
September 2011
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KSZ8864RMN
Register 28 (0x1C): Reserved
Register 44 (0x2C): Port 1 Control 5
Register 60 (0x3C): Port 2 Control 5
Register 76 (0x4C): Reserved
Register 92 (0x5C): Reserved
Address
Name
Description
Mode
Default
7
Disable Auto-Negotiation
1, disable auto-negotiation, speed and duplex are
decided by bit 6 and 5 of the same register.
0, auto-negotiation is on.
R/W
0
6
Forced Speed
1, forced 100BT if AN is disabled (bit 7).
0, forced 10BT if AN is disabled (bit 7).
R/W
1
5
Forced Duplex
1, forced full-duplex if (1) AN is disabled or (2) AN is
enabled but failed.
0, forced half-duplex if (1) AN is disabled or (2) AN is
enabled but failed (Default).
R/W
4
Advertised Flow Control
Capability
1, advertise flow control capability.
0, suppress flow control capability from transmission to
link partner.
R/W
1
3
Advertised 100BT FullDuplex Capability
1, advertise 100BT full-duplex capability.
0, suppress 100BT full-duplex capability from
transmission to link partner.
R/W
1
2
Advertised 100BT HalfDuplex Capability
1, advertise 100BT half-duplex capability.
0, suppress 100BT half-duplex capability from
transmission to link partner.
R/W
1
1
Advertised 10BT FullDuplex Capability
1, advertise 10BT full-duplex capability.
0, suppress 10BT full-duplex capability from
transmission to link partner.
R/W
1
0
Advertised 10BT HalfDuplex Capability
1, advertise 10BT half-duplex capability.
0, suppress 10BT half-duplex capability from
transmission to link partner.
R/W
1
September 2011
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Micrel, Inc.
KSZ8864RMN
Register 29 (0x1D): Reserved
Register 45 (0x2D): Port 1 Control 6
Register 61 (0x3D): Port 2 Control 6
Register 77 (0x4D): Port 3 Control 6 for MAC Loop-back
Register 93 (0x5D): Port 4 Control 6 for MAC Loop-back
Address
Name
Description
Mode
Default
7
LED Off
1, turn off all port’s LEDs (PxLED0, PxLED1, where “x”
is the port number). These pins will be driven high if
this bit is set to one.
0, normal operation.
R/W
0
6
Txids
1, disable port’s transmitter.
0, normal operation.
R/W
0
5
Restart AN
1, restart auto-negotiation.
R/W
0
0, normal operation.
(SC)
4
Reserved
N/A
RO
0
3
Power Down
1, power down.
0, normal operation.
R/W
0
2
Disable Auto MDI/MDI-X
1, disable auto MDI/MDI-X function.
0, enable auto MDI/MDI-X function.
R/W
0
1
Forced MDI
1, if auto MDI/MDI-X is disabled, force PHY into MDIX
mode.
0, MDI mode.
R/W
0
0
MAC Loopback
1 = Perform MAC loopback, loop back path as follows:
E.g. set port 1 MAC Loopback (reg. 45, bit 0 = ‘1’), use
port 2 as monitor port. The packets will transfer
R/W
0
Start: Port 2 receiving (also can start to receive
packets from port 1).
Loop-back: Port 1’s MAC.
End: Port 2 transmitting (also can end at port 1).
Setting reg. 77, 93, bit 0 = ‘1’ will perform MAC
loopback on port 3, 4 respectively with monitor port 2.
0 = Normal Operation.
Note: From bit [7-1] are reserved for the Port 3 and Port 4.
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Register 30 (0x1E): Reserved
Register 46 (0x2E): Port 1 Status 1
Register 62 (0x3E): Port 2 Status 1
Register 78 (0x4E): Reserved
Register 94 (0x5E): Reserved
Address
Name
Description
Mode
Default
7
MDIX Status
1, MDI-X.
0, MDI.
RO
0
6
AN Done
1, AN done.
0, AN not done.
RO
0
5
Link Good
1, link good.
0, link not good.
RO
0
4
Partner Flow Control
Capability
1, link partner flow control capable.
0, link partner not flow control capable.
RO
0
3
Partner 100BT FullDuplex Capability
1, link partner 100BT full-duplex capable.
0, link partner not 100BT full-duplex capable.
RO
0
2
Partner 100BT HalfDuplex Capability
1, link partner 100BT half-duplex capable.
0, link partner not 100BT half-duplex capable.
RO
0
1
Partner 10BT Full-Duplex
Capability
1, link partner 10BT full-duplex capable.
0, link partner not 10BT full-duplex capable.
RO
0
0
Partner 10BT Half-Duplex
Capability
1, link partner 10BT half-duplex capable.
0, link partner not 10BT half-duplex capable.
RO
0
Mode
Default
R/W
0
RO
0
Register 31 (0x1F): Reserved
Register 47 (0x2F): Port 1 Control 7 and Status 2
Register 63 (0x3F): Port 2 Control 7 and Status 2
Register 79 (0x4F): Reserved
Register 95 (0x5F): Reserved
Address
Name
7
PHY Loopback
Description
1 = Perform PHY loopback, loop back path as follows:
E.g. set port 1 PHY Loopback (reg. 47, bit 7 = ‘1’)
Use the port 2 as monitor port. The packets will
transfer
Start: Port 2 receiving (also can start from port 1).
Loopback: PMD/PMA of port 1’s PHY
End: Port 2 transmitting (also can end at port 1).
Setting reg. 63 bit 7 = ‘1’ will perform PHY
loopback on port 2 with monitor port 1.
0 = Normal Operation.
6
Reserved
September 2011
N/A Do not change
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KSZ8864RMN
Address
Name
Description
Mode
Default
5
PHY Isolate
1, electrical isolation of PHY from MII and TX+/TX-.
0, normal operation.
R/W
0
4
Soft Reset
1, PHY soft reset. This bit is self clear.
0, normal operation.
R/W
(SC)
0
3
Force Link
1, force link in the PHY.
0, normal operation
R/W
0
2-0
Port Operation Mode
Indication
Indicate the current state of port operation mode:
RO
001
[000] = Reseved
[001] = still in auto-negotiation
[010] = 10BASE-T half duplex
[011] = 100BASE-TX half duplex
[100] = Reserved
[101] = 10BASE-T full duplex
[110] = 100BASE-TX full duplex
[111] = Reserved
Note:
Port Control 12 and 13, 14 and Port Status 1,2 contents can be accessed by MIIM (MDC/MDIO) interface via the standard MIIM register definition.
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KSZ8864RMN
Advanced Control Registers
Registers 104 to 109 define the switching engine’s MAC address. This 48-bit address is used as the source address in MAC pause control frames,
or is used for self MAC address filtering, see the register 134 also.
Address
Name
Description
Mode
Default
R/W
0x00
R/W
0x10
R/W
0xA1
R/W
0xff
R/W
0xff
R/W
0xff
Register 104 (0x68): MAC Address Register 0
7-0
MACA[47:40]
Register 105 (0x69): MAC Address Register 1
7-0
MACA[39:32]
Register 106 (0x6A): MAC Address Register 2
7-0
MACA[31:24]
Register 107 (0x6B): MAC Address Register 3
7-0
MACA[23:16]
Register 108 (0x6C): MAC Address Register 4
7-0
MACA[15:8]
Register 109 (0X6D): MAC Address Register 5
7-0
MACA[7:0]
Use registers 110 and 111 to read or write data to the static MAC address table, VLAN table, dynamic address table, or the MIB counters.
Address
Name
Description
Mode
Default
Reserved.
R/W
000
1, read cycle.
R/W
0
R/W
0
R/W
00
R/W
00000000
Mode
Default
R/W
00000
R/W
00000000
R/W
00000000
Register 110 (0x6E): Indirect Access Control 0
7-5
Reserved
4
Read High Write Low
0, write cycle.
3-2
Table Select
00 = static mac address table selected.
01 = VLAN table selected.
10 = dynamic address table selected.
11 = MIB counter selected.
1-0
Indirect Address High
Bit 9-8 of indirect address.
Register 111 (0x6F): Indirect Access Control 1
7-0
Indirect Address Low
Bit 7-0 of indirect address.
Note:
Write to Register 111 will actually trigger a command. Read or write access will be decided by bit 4 of Register 110.
Address
Name
Description
Register 112 (0x70): Indirect Data Register 8
68-64
Indirect Data
Bit 68-64 of indirect data.
Register 113 (0x71): Indirect Data Register 7
63-56
Indirect Data
Bit 63-56 of indirect data.
Register 114 (0x72): Indirect Data Register 6
55-48
Indirect Data
September 2011
Bit 55-48 of indirect data.
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Address
KSZ8864RMN
Name
Description
Mode
Default
R/W
00000000
R/W
00000000
R/W
00000000
R/W
00000000
R/W
00000000
R/W
00000000
Register 115 (0x73): Indirect Data Register 5
47-40
Indirect Data
Bit 47-40 of indirect data.
Register 116 (0x74): Indirect Data Register 4
39-32
Indirect Data
Bit 39-32 of indirect data.
Register 117 (0x75): Indirect Data Register 3
31-24
Indirect Data
Bit of 31-24 of indirect data
Register 118 (0x76): Indirect Data Register 2
23-16
Indirect Data
Bit 23-16 of indirect data.
Register 119 (0x77): Indirect Data Register 1
15-8
Indirect Data
Bit 15-8 of indirect data.
Register 120 (0x78): Indirect Data Register 0
7-0
Indirect Data
Bit 7-0 of indirect data.
Register 124 (0x7C): Interrupt Status Register
7-3
Reserved
Reserved.
RO
000
2
Port 2 Interrupt Status
1, Port 2 interrupt request
RO
0
RO
0
RO
0
0, normal
Note: This bit is set by port 2 link change. Write a “1” to
clear this bit
1
Port 1 Interrupt Status
1, Port 1 interrupt request
0, normal
Note: This bit is set by port 1 link change. Write a “1” to
clear this bit
0
Reserved
Reserved.
Register 125 (0x7D): Interrupt Mask Register
7-3
Reserved
Reserved.
RO
000
2
Port 2 Interrupt Mask
1, Port 2 interrupt mask
R/W
0
R/W
0
RO
0
0, normal
1
Port 1 Interrupt Mask
1, Port 1 interrupt mask
0, normal
0
Reserved
September 2011
Reserved.
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KSZ8864RMN
The registers 128, 129 can be used to map from 802.1p priority field 0-7 to switch’s four priority queues 0-3, 0x3 is highest priority
queues as priority 3, 0x0 is lowest priority queues as priority 0.
Address
Name
Description
Mode
Default
Register 128 (0x80): Global Control 12
7-6
Tag_0x3
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE 802.1p
tag has a value of 0x3.
R/W
0x1
5-4
Tag_0x2
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE 802.1p
tag has a value of 0x2.
R/W
0x1
3-2
Tag_0x1
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE 802.1p
tag has a value of 0x1.
R/W
0x0
1-0
Tag_0x0
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE 802.1p
tag has a value of 0x0.
R/W
0x0
Register 129 (0x81): Global Control 13
7-6
Tag_0x7
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE 802.1p
tag has a value of 0x7.
R/W
0x3
5-4
Tag_0x6
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE 802.1p
tag has a value of 0x6.
R/W
0x3
3-2
Tag_0x5
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE 802.1p
tag has a value of 0x5.
R/W
0x2
1-0
Tag_0x4
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE 802.1p
tag has a value of 0x4.
R/W
0x2
When the 2 Queue configuration is selected, these
Pri_2Q[1:0] bits are used to map the 2-bit result of
IEEE 802.1p from register 128/129 or TOS/DiffServ
from register 144- 159 mapping (for 4 Queues) into
two queues low/high priorities.
R/W
10
RO
0
Register 130 (0x82): Global Control 14
7-6
Pri_2Q[1:0]
(Note that program
Prio_2Q[1:0] = 01 is not
supported and should be
avoided)
2-bit result of IEEE 802.1p or TOS/DiffServ
00 (0) = map to Low priority queue
01 (1) = Prio_2Q[0] map to Low/High priority queue
10 (2) = Prio_2Q[1] map to Low/High priority queue
11 (3) = map to High priority queue
Pri_2Q[1:0] =
00: Result 0,1,2 are low priority. 3 is high priority.
10: Result 0,1 are low priority. 2,3 are high priority
(default).
11: Result 0 is low priority. 1,2,3 are high priority.
5
Reserved
September 2011
N/A Do not change.
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KSZ8864RMN
Address
Name
Description
Mode
Default
4
Reserved
N/A Do not change.
RO
0
3-2
Reserved
N/A Do not change.
RO
01
1
Reserved
N/A Do not change.
RO
0
0
Reserved
N/A Do not change.
RO
0.
Register 131 (0x83): Global Control 15
7
Reserved
N/A
RO
0
6
Reserved
N/A
RO
0
5
Unknown unicast packet
forward
1 = enable supporting unknown unicast packet
forward
R/W
0
R/W
00000
R/W
01
R/W
0
R/W
00000
RO
00
R/W
0
R/W
00000
0 = disable
4-0
Unknown unicast packet
forward port map
00000 = filter uknown unicast packet
00001 = forward uknown unicast packet to Port 1
00011 = forward uknown unicast packet to Port 1,
Port 2
11111 = broadcast uknown unicast packet to all
ports
Register 132 (0x84): Global Control 16
7-6
Chip I/O output drive strength
select[1:0]
Output drive strength select[1:0] =
00 = 4mA drive strength
01 = 8mA drive strength (default)
10 = 12mA drive strength
11 = 16 mA drive strength
5
4-0
Unknown multicast packet
forward (not including IP
multicast packet)
1 = enable supporting unknown multicast packet
forward
Unknown multicast packet
forward port map
00000 = filter uknown multiicast packet
0 = disable
00001 = forward uknown multicast packet to Port 1
00011 = forward uknown multicast packet to Port 1,
Port 2
11111 = broadcast uknown multicast packet to all
ports
Register 133(0x85): Global Control 17
7-6
Reserved
5
Unknown VID packet forward
4-0
Unknown VID packet forward
port map
1 = enable supporting unknown VID packet forward
0 = disable
00000 = filter uknown VID packet
00001 = forward uknown VID packet to Port 1
00011 = forward uknown VID packet to Port 1, Port
2
11111 = broadcast uknown VID packet to all ports
September 2011
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Address
KSZ8864RMN
Name
Description
Mode
Default
Register 134 (0x86): Global Control 18
7
Reserved
N/A
RO
0
6
Self Address Filter Enable
1 = Enable filtering of self-address unicast and
multicast packet
R/W
0
R/W
0
R/W
00000
0 = Do not filter self-address packet
Note: The self-address filtering will filter packets on
the egress port , self MAC address is assigned in
the register 104-109.
5
Unknown IP multicast packet
forward
1 = enable supporting unknown IP multicast packet
forward
0 = disable
4-0
Unknown IP multicast packet
forward port map
00000 = filter uknown IP multiicast packet
00001 = forward uknown IP multicast packet to Port
1
00011 = forward uknown IP multicast packet to Port
1, Port 2
11111 = broadcast uknown IP multicast packet to
all ports
Register 135 (0x87): Global Control 19
7
Reserved
N/A Do not change.
RO
0
6
Reserved
N/A Do not change.
RO
0
5-4
Ingress Rate Limit Period
The unit period for calculating Ingress Rate Limit
R/W
01
R/W
0
R/W
0
RO
00
00 = 16 ms
01 = 64 ms
1x = 256 ms
3
Queue-based Egress Rate
Limit Enabled
Enable Queue-based Egress Rate Limit
0 = port-base Egress Rate Limit (default)
1 = queue-based Egress Rate Limit
2
Insertion Source Port PVID
Tag Selection Enable
1 = enable source port PVID tag insertion or noninsertion option on the egress port for each source
port PVID based on the ports registers control 8.
0 = disable, all packets from any ingress port will be
inserted PVID based on port register control 0 bit 2.
1-0
Reserved
N/A Do not change.
Register 144 (0x90): TOS Priority Control Register 0
The IPv4/IPv6 TOS priority control registers implement a fully decoded 64 bit differentiated services code point (DSCP) register used to
determine priority from the 6 bit TOS 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 mapped to the value in the corresponding bit in the DSCP register.
7-6
DSCP[7:6]
IPv4 and IPv6 mapping
R/W
00
The value in this field is used as the frame’s priority
when bits[7:2] of the frame’s IP TOS/DiffServ/Traffic
Class value is 0x03.
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Address
Name
Description
5-4
DSCP[5:4]
IPv4 and IPv6 mapping
Mode
Default
R/W
00
R/W
00
R/W
00
The value in this field is used as the frame’s priority
when bits[7:2] of the frame’s IP TOS/DiffServ/Traffic
Class value is 0x02
3-2
DSCP[3:2]
IPv4 and IPv6 mapping
The value in this field is used as the frame’s priority
when bits[7:2] of the frame’s IP TOS/DiffServ/Traffic
Class value is 0x01
1-0
DSCP[1:0]
IPv4 and IPv6 mapping
The value in this field is used as the frame’s priority
when bits[7:2] of the frame’s IP TOS/DiffServ/Traffic
Class value is 0x00
Register 145 (0x91): TOS Priority Control Register 1
7-6
DSCP[15:14]
IPv4 and IPv6 mapping _ for value 0x07
R/W
00
5-4
DSCP[13:12]
IPv4 and IPv6 mapping _ for value 0x06
R/W
00
3-2
DSCP[11:10]
IPv4 and IPv6 mapping _ for value 0x05
R/W
00
1-0
DSCP[9:8]
IPv4 and IPv6 mapping _ for value 0x04
R/W
00
Register 146 (0x92): TOS Priority Control Register 2
7-6
DSCP[23:22]
IPv4 and IPv6 mapping _ for value 0x0B
R/W
00
5-4
DSCP[21:20]
IPv4 and IPv6 mapping _ for value 0x0A
R/W
00
3-2
DSCP[19:18]
IPv4 and IPv6 mapping _ for value 0x09
R/W
00
1-0
DSCP[17:16]
IPv4 and IPv6 mapping _ for value 0x08
R/W
00
Register 147 (0x93): TOS Priority Control Register 3
7-6
DSCP[31:30]
IPv4 and IPv6 mapping _ for value 0x0F
R/W
00
5-4
DSCP[29:28]
IPv4 and IPv6 mapping _ for value 0x0E
R/W
00
3-2
DSCP[27:26]
IPv4 and IPv6 mapping _ for value 0x0D
R/W
00
1-0
DSCP[25:24]
IPv4 and IPv6 mapping _ for value 0x0C
R/W
00
Register 148 (0x94): TOS Priority Control Register 4
7-6
DSCP[39:38]
IPv4 and IPv6 mapping _ for value 0x13
R/W
00
5-4
DSCP[37:36]
IPv4 and IPv6 mapping _ for value 0x12
R/W
00
3-2
DSCP[35:34]
IPv4 and IPv6 mapping _ for value 0x11
R/W
00
1-0
DSCP[33:32]
IPv4 and IPv6 mapping _ for value 0x10
R/W
00
Register 149 (0x95): TOS Priority Control Register 5
7-6
DSCP[47:46]
IPv4 and IPv6 mapping _ for value 0x17
R/W
00
5-4
DSCP[45:44]
IPv4 and IPv6 mapping _ for value 0x16
R/W
00
3-2
DSCP[43:42]
IPv4 and IPv6 mapping _ for value 0x15
R/W
00
1-0
DSCP[41:40]
IPv4 and IPv6 mapping _ for value 0x14
R/W
00
September 2011
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Address
KSZ8864RMN
Name
Description
Mode
Default
Register 150 (0x96): TOS Priority Control Register 6
7-6
DSCP[55:54]
IPv4 and IPv6 mapping _ for value 0x1B
R/W
00
5-4
DSCP[53:52]
IPv4 and IPv6 mapping _ for value 0x1A
R/W
00
3-2
DSCP[51:50]
IPv4 and IPv6 mapping _ for value 0x19
R/W
00
1-0
DSCP[49:48]
IPv4 and IPv6 mapping _ for value 0x18
R/W
00
Register 151 (0x97): TOS Priority Control Register 7
7-6
DSCP[63:62]
IPv4 and IPv6 mapping _ for value 0x1F
R/W
00
5-4
DSCP[61:60]
IPv4 and IPv6 mapping _ for value 0x1E
R/W
00
3-2
DSCP[59:58]
IPv4 and IPv6 mapping _ for value 0x1D
R/W
00
1-0
DSCP[57:56]
IPv4 and IPv6 mapping _ for value 0x1C
R/W
00
Register 152 (0x98): TOS Priority Control Register 8
7-6
DSCP[71:70]
IPv4 and IPv6 mapping _ for value 0x23
R/W
00
5-4
DSCP[69:68]
IPv4 and IPv6 mapping _ for value 0x22
R/W
00
3-2
DSCP[67:66]
IPv4 and IPv6 mapping _ for value 0x21
R/W
00
1-0
DSCP[65:64]
IPv4 and IPv6 mapping _ for value 0x20
R/W
00
Register 153 (0x99): TOS Priority Control Register 9
7-6
DSCP[79:78]
IPv4 and IPv6 mapping _ for value 0x27
R/W
00
5-4
DSCP[77:76]
IPv4 and IPv6 mapping _ for value 0x26
R/W
00
3-2
DSCP[75:74]
IPv4 and IPv6 mapping _ for value 0x25
R/W
00
1-0
DSCP[73:72]
IPv4 and IPv6 mapping _ for value 0x24
R/W
00
Register 154 (0x9A): TOS Priority Control Register 10
7-6
DSCP[87:86]
IPv4 and IPv6 mapping _ for value 0x2B
R/W
00
5-4
DSCP[85:84]
IPv4 and IPv6 mapping _ for value 0x2A
R/W
00
3-2
DSCP[83:82]
IPv4 and IPv6 mapping _ for value 0x29
R/W
00
1-0
DSCP[81:80]
IPv4 and IPv6 mapping _ for value 0x28
R/W
00
Register 155 (0x9B): TOS Priority Control Register 11
7-6
DSCP[95:94]
IPv4 and IPv6 mapping _ for value 0x2F
R/W
00
5-4
DSCP[93:92]
IPv4 and IPv6 mapping _ for value 0x2E
R/W
00
3-2
DSCP[91:90]
IPv4 and IPv6 mapping _ for value 0x2D
R/W
00
1-0
DSCP[89:88]
IPv4 and IPv6 mapping _ for value 0x2C
R/W
00
Register 156 (0x9C): TOS Priority Control Register 12
7-6
DSCP[103:102]
IPv4 and IPv6 mapping _ for value 0x33
R/W
00
5-4
DSCP[101:100]
IPv4 and IPv6 mapping _ for value 0x32
R/W
00
3-2
DSCP[99:98]
IPv4 and IPv6 mapping _ for value 0x31
R/W
00
1-0
DSCP[97:96]
IPv4 and IPv6 mapping _ for value 0x30
R/W
00
September 2011
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Address
KSZ8864RMN
Name
Description
Mode
Default
Register 157 (0x9D): TOS Priority Control Register 13
7-6
DSCP[111:110]
IPv4 and IPv6 mapping _ for value 0x37
R/W
00
5-4
DSCP[109:108]
IPv4 and IPv6 mapping _ for value 0x36
R/W
00
3-2
DSCP[107:106]
IPv4 and IPv6 mapping _ for value 0x35
R/W
00
1-0
DSCP[105:104]
IPv4 and IPv6 mapping _ for value 0x34
R/W
00
Register 158 (0x9E): TOS Priority Control Register 14
7-6
DSCP[119:118]
IPv4 and IPv6 mapping _ for value 0x3B
R/W
00
5-4
DSCP[117:116]
IPv4 and IPv6 mapping _ for value 0x3A
R/W
00
3-2
DSCP[115:114]
IPv4 and IPv6 mapping _ for value 0x39
R/W
00
1-0
DSCP[113:112]
IPv4 and IPv6 mapping _ for value 0x38
R/W
00
Register 159 (0x9F): TOS Priority Control Register 15
7-6
DSCP[127:126]
IPv4 and IPv6 mapping _ for value 0x3F
R/W
00
5-4
DSCP[125:124]
IPv4 and IPv6 mapping _ for value 0x3E
R/W
00
3-2
DSCP[123:122]
IPv4 and IPv6 mapping _ for value 0x3D
R/W
00
1-0
DSCP[121:120]
IPv4 and IPv6 mapping _ for value 0x3C
R/W
00
RO
0000
R/W
0
R/W
0
Register 176 (0xB0): Reserved
Register 192 (0xC0): Port 1 Control 8
Register 208 (0xD0): Port 2 Control 8
Register 224 (0xE0): Port 3 Control 8
Register 240 (0xF0): Port 4 Control 8
7-4
Reserved
3
Insert Source Port PVID for
Untagged Packet Destination
to Highest Egress Port
Note: Enabled by the register
135 bit 2
2
Insert Source Port PVID for
Untagged Packet Destination
to Second Highest Egress Port
Note: Enabled by the register
135 bit 2
September 2011
Register 208: insert source Port 2 PVID for
untagged frame at egress Port 4
Register 224: insert source Port 3 PVID for
untagged frame at egress Port 4
Register 240: insert source Port 4 PVID for
untagged frame at egress Port 3
Register 192: insert source Port 1 PVID for
untagged frame at egress Port 3
Register 208: insert source Port 2 PVID for
untagged frame at egress Port 3
Register 224: insert source Port 3 PVID for
untagged frame at egress Port 2
Register 240: insert source Port 4 PVID for
untagged frame at egress Port 2.
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KSZ8864RMN
Address
Name
Description
1
Insert Source Port PVID for
Untagged Packet Destination
to Second Lowest Egress Port
Register 192: insert source Port 1 PVID for
untagged frame at egress Port 2
Note: Enabled by the register
135 bit 2
0
Reserved
Mode
Default
R/W
0
Reserved
RO
0
RO
0000000
This bit in combination with Register16/32/48/64/80
bit 0 will select the split of 1/2/4 queues:
R/W
0
R/W
0
R/W
1
R/W
0001000
Register 208: insert source Port 2 PVID for
untagged frame at egress Port 1
Register 224: insert source Port 3 PVID for
untagged frame at egress Port 1
Register 240: insert source Port 4 PVID for
untagged frame at egress Port 1
Register 177 (0xB1): Reserved
Register 193 (0xC1): Port 1 Control 9
Register 209 (0xD1): Port 2 Control 9
Register 225 (0xE1): Port 3 Control 9
Register 241 (0xF1): Port 4 Control 9
7-2
1
Reserved
4 Queue Split Enable
{Register177 bit 1, Register16 bit 0}=
11, reserved.
10, the port output queue is split into four priority
queues or if map 802.1p to priority 0-3 mode.
01, the port output queue is split into two priority
queues or if map 802.1p to priority 0-3 mode.
00, single output queue on the port. There is no
priority differentiation even though packets are
classified into high and low priority
0
Enable Dropping Tag
0 = disable tag drop
1 = enable tag drop
Register 178 (0xB2): Reserved
Register 194 (0xC2): Port 1 Control 10
Register 210 (0xD2): Port 2 Control 10
Register 226 (0xE2): Port 3 Control 10
Register 242 (0xF2): Port 4 Control 10
7
Enable Port Transmit Queue 3
Ratio
0, strict priority, will transmit all the packets from
this priority queue 3 before transmit lower priority
queue.
1, bit[6:0] reflect the packet number allow to
transmit from this priority queue 3 within a certain
time
6-0
Port Transmit Queue 3
Ratio[6:0]
September 2011
Packet number for Transmit Queue 3 for highest
priority packets in four queues mode
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Address
KSZ8864RMN
Name
Description
Mode
Default
R/W
1
Packet number for Transmit Queue 2 for high/low
priority packets in high/low priority packets in four
queues mode
R/W
0000100
0, strict priority, will transmit all the packets from
this priority queue 1 before transmit lower priority
queue.
R/W
1
Packet number for Transmit Queue 1 for low/high
priority packets in four queues mode and high
priority packets in two queues mode
R/W
0000010
0, strict priority, will transmit all the packets from
this priority queue 0 before transmit lower priority
queue.
R/W
1
R/W
0000001
Register 179 (0xB3): Reserved
Register 195 (0xC3): Port 1 Control 11
Register 211 (0xD3): Port 2 Control 11
Register 227 (0xE3): Port 3 Control 11
Register 243 (0xF3): Port 4 Control 11
7
Enable Port Transmit Queue 2
Ratio
0, strict priority, will transmit all the packets from
this priority queue 2 before transmit lower priority
queue.
1, bit[6:0] reflect the packet number allow to
transmit from this priority queue 1 within a certain
time
6-0
Port Transmit Queue 2
Ratio[6:0]
Register 180 (0xB4): Reserved
Register 196 (0xC4): Port 1 Control 12
Register 212 (0xD4): Port 2 Control 12
Register 228 (0xE4): Port 3 Control 12
Register 244 (0xF4): Port 4 Control 12
7
Enable Port Transmit Queue 1
Rate
1, bit[6:0] reflect the packet number allow to
transmit from this priority queue 1 within a certain
time
6-0
Port Transmit Queue 1
Ratio[6:0]
Register 181 (0xB5): Reserved
Register 197 (0xC5): Port 1 Control 13
Register 213 (0xD5): Port 2 Control 13
Register 229 (0xE5): Port 3 Control 13
Register 245 (0xF5): Port 4 Control 13
7
Enable Port Transmit Queue 0
Rate
1, bit[6:0] reflect the packet number allow to
transmit from this priority queue 0 within a certain
time
6-0
Port Transmit Queue 0
Ratio[6:0]
September 2011
packet number for Transmit Queue 0 for lowest
priority packets in four queues mode and low
priority packets in two queues mode
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Address
KSZ8864RMN
Name
Description
Mode
Default
RO
000
R/W
0
R/W
00
R/W
0
R/W
0
RO
0
R/W
0000000
Register 182 (0xB6): Reserved
Register 198 (0xC6): Port 1 Rate Limit Control
Register 214 (0xD6): Port 2 Rate Limit Control
Register 230 (0xE6): Port 3 Rate Limit Control
Register 246 (0xF6): Port 4 Rate Limit Control
7-5
Reserved
4
Ingress Rate Limit Flow
Control Enable
1 = Flow Control is asserted if the port’s receive
rate is exceeded
0 = Flow Control is not asserted if the port’s receive
rate is exceeded
Ingress Limit Mode
These bits determine what kinds of frames are
limited and counted against ingress rate limiting.
= 00, limit and count all frames
3-2
Limit Mode
= 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
Count IFG bytes
= 1, each frame’s minimum inter frame gap
1
Count IFG
(IFG) bytes (12 per frame) are included in Ingress
and Egress rate limiting calculations.
= 0, IFG bytes are not counted.
Count Preamble bytes
= 1, each frame’s preamble bytes (8 per
0
Count Pre
frame) are included in Ingress and Egress rate
limiting calculations.
= 0, preamble bytes are not counted.
Register 183 (0xB7): Reserved
Register 199 (0xC7): Port 1 Priority 0 Ingress Limit Control 1
Register 215 (0xD7): Port 2 Priority 0 Ingress Limit Control 1
Register 231 (0xE7): Port 3 Priority 0 Ingress Limit Control 1
Register 247 (0xF7): Port 4 Priority 0 Ingress Limit Control 1
7
Reserved
6-0
Port Based Priority 0 Ingress
Limit
Ingress data rate limit for priority 0 frames
September 2011
Ingress traffic from this port is shaped according to
the Data Rate Selected Table. See the table follow
the end of Egress limit control registers
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Address
KSZ8864RMN
Name
Description
Mode
Default
RO
0
R/W
0000000
RO
0
R/W
0000000
RO
0
R/W
0000000
Register 184 (0xB8): Reserved
Register 200 (0xC8): Port 1 Priority 1 Ingress Limit Control 2
Register 216 (0xD8): Port 2 Priority 1 Ingress Limit Control 2
Register 232 (0xE8): Port 3 Priority 1 Ingress Limit Control 2
Register 248 (0xF8): Port 4 Priority 1 Ingress Limit Control 2
7
Reserved
6-0
Port Based Priority 1 Ingress
Limit
Ingress data rate limit for priority 1 frames
Ingress traffic from this port is shaped according to
the Data Rate Selected Table. See the table follow
the end of Egress limit control registers
Register 185 (0xB9): Reserved
Register 201 (0xC9): Port 1 Priority 2 Ingress Limit Control 3
Register 217 (0xD9): Port 2 Priority 2 Ingress Limit Control 3
Register 233 (0xE9): Port 3 Priority 2 Ingress Limit Control 3
Register 249 (0xF9): Port 4 Priority 2 Ingress Limit Control 3
7
Reserved
6-0
Port Based Priority 2 Ingress
Limit
Ingress data rate limit for priority 2 frames
Ingress traffic from this port is shaped according to
the Data Rate Selected Table. See the table follow
the end of Egress limit control registers
Register 186 (0xBA): Reserved
Register 202 (0xCA): Port 1 Priority 3 Ingress Limit Control 4
Register 218 (0xDA): Port 2 Priority 3 Ingress Limit Control 4
Register 234 (0xEA): Port 3 Priority 3 Ingress Limit Control 4
Register 250 (0xFA): Port 4 Priority 3 Ingress Limit Control 4
7
Reserved
6-0
Port Based Priority 3 Ingress
Limit
Ingress data rate limit for priority 3 frames
September 2011
Ingress traffic from this port is shaped according to
the Data Rate Selected Table. See the table follow
the end of Egress limit control registers
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Address
KSZ8864RMN
Name
Description
Mode
Default
RO
0
R/W
0000000
RO
0
R/W
0000000
RO
0
R/W
0000000
Register 187 (0xBB): Reserved
Register 203 (0xCB): Port 1 Queue 0 Egress Limit Control 1
Register 219 (0xDB): Port 2 Queue 0 Egress Limit Control 1
Register 235 (0xEB): Port 3 Queue 0 Egress Limit Control 1
Register 251 (0xFB): Port 4 Queue 0 Egress Limit Control 1
7
Reserved
Egress data rate limit for priority 0 frames
6-0
Port Queue 0 Egress Limit
Egress traffic from this priority queue is shaped
according to the Data Rate Selected Table. See the
table follow the end of Egress limit control registers.
In four queues mode, it is lowest priority.
In two queues mode, it is low priority.
Register 188 (0xBC): Reserved
Register 204 (0xCC): Port 1 Queue 1 Egress Limit Control 2
Register 220 (0xDC): Port 2 Queue 1 Egress Limit Control 2
Register 236 (0xEC): Port 3 Queue 1 Egress Limit Control 2
Register 252 (0xFC): Port 4 Queue 1 Egress Limit Control 2
7
Reserved
Egress data rate limit for priority 1 frames
6-0
Port Queue 1 Egress Limit
Egress traffic from this priority queue is shaped
according to the Data Rate Selected Table. See the
table follow the end of Egress limit control registers.
In four queues mode, it is low/high priority.
In two queues mode, it is high priority.
Register 189 (0xBD): Reserved
Register 205 (0xCD): Port 1 Queue 2 Egress Limit Control 3
Register 221 (0xDD): Port 2 Queue 2 Egress Limit Control 3
Register 237 (0xED): Port 3 Queue 2 Egress Limit Control 3
Register 253 (0xFD): Port 4 Queue 2 Egress Limit Control 3
7
Reserved
Egress data rate limit for priority 2 frames
6-0
Port Queue 2 Egress Limit
Egress traffic from this priority queue is shaped
according to the Data Rate Selected Table. See the
table follow the end of Egress limit control registers.
In four queues mode, it is high/low priority.
September 2011
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Address
KSZ8864RMN
Name
Description
Mode
Default
RO
0 or 1
R/W
0000000
Register 190 (0xBE): Reserved
Register 206 (0xCE): Port 1 Queue 3 Egress Limit Control 4
Register 222 (0xDE): Port 2 Queue 3 Egress Limit Control 4
Register 238 (0xEE): Port 3 Queue 3 Egress Limit Control 4
Register 254 (0xFE): Port 4 Queue 3 Egress Limit Control 4 and Chip ID
7
=0 is for the register 206/222/238
Reserved and Chip ID
=1 is KSZ8864RMN Chip ID for the register 254
Egress data rate limit for priority 3 frames
6-0
Port Queue 3 Egress Limit
Egress traffic from this priority queue is shaped
according to the Data Rate Selected Table. See the
table follow the end of Egress limit control registers.
In four queues mode, it is highest priority.
Notes:
1.
2.
In the port priority 0-3 ingress rate limit mode, there is a need to set all related ingress/egress ports to two queues or four queues mode.
In the port queue 0-3 egress rate limit mode, the highest priority get exact rate limit based on the rate select table, other priorities
packets rate are based up on the ratio of the port register control 10/11/12/13 when use more than one egress queue per port.
Data Rate Selection Table in 100BT
Rate for 100BT mode
Priority/Queue 0-3 Ingress/egress limit Control Register bit[6:0]= decimal
1 Mbps <= rate <= 99 Mbps
rate(decimal integer 1-99)
rate = 100 Mbps
0 or 100 (decimal), ‘0’ is default value
Less than 1Mbps see as below
Decimal
64 Kbps
7’d101
128 Kbps
7’d102
192 Kbps
7’d103
256 Kbps
7’d104
320 Kbps
7’d105
384 Kbps
7’d106
448 Kbps
7’d107
512 Kbps
7’d108
576 Kbps
7’d109
640 Kbps
7’d110
704 Kbps
7’d111
768 Kbps
7’d112
832 Kbps
7’d113
896 Kbps
7’d114
960 Kbps
7’d115
Table 11. 100BT Rate Selection for the Rate limit
September 2011
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KSZ8864RMN
Data Rate Selection Table in 10BT
Rate for 10BT mode
Priority/Queue 0-3 Ingress/egress limit Control Register bit[6:0]= decimal
1 Mbps <= rate <= 9 Mbps
rate(decimal integer 1-9)
rate = 10 Mbps
0 or 10 (decimal), ‘0’ is default value
Less than 1Mbps see as below
Decimal
64 Kbps
7’d101
128 Kbps
7’d102
192 Kbps
7’d103
256 Kbps
7’d104
320 Kbps
7’d105
384 Kbps
7’d106
448 Kbps
7’d107
512 Kbps
7’d108
576 Kbps
7’d109
640 Kbps
7’d110
704 Kbps
7’d111
768 Kbps
7’d112
832 Kbps
7’d113
896 Kbps
7’d114
960 Kbps
7’d115
Table 12. 10BT Rate Selection for the Rate Limit
Address
Name
Description
Mode
Default
RO
0x80
R/W
0
R/W
0
0, Port 3 SW3-MII/RMII interface speed at 100BT
(Default)
R/W
0
N/A Do not change.
RO
0x15
Register 191(0xBF): Testing Register
7-0
Reserved
N/A
Register 207(0xCF): Port3 Control Register 1
7
Port 3 MAC3 SW3-MII/RMII
half duplex mode
6
Port 3 MAC3 SW3-MII/RMII
flow control enable
5
Port 3 MAC3 SW3-MII/RMII
speed setting
4-0
Reserved
September 2011
1, enable SW3-MII/RMII interface half duplex mode
0, enable SW3-MII/RMII interface full duplex mode
(Default)
1, enable full duplex flow control on SW3-MII/RMII
interface
0, disable full duplex flow control on SW3-MII/RMII
interface (Default)
1, Port 3 SW3-MII/RMII interface speed at 10BT.
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Address
KSZ8864RMN
Name
Description
Mode
Default
RO
0
Register 223(0xDF): Port3 Control Register 2
7
Reserved
6
Select Switch Port 3 MAC 3
SW3-MII interface mode
5-0
Reserved
Reserved
1, Select Switch Port 3 MAC3 interface as MAC
mode.
0, Select Switch Port 3 MAC3 interface as PHY
mode (default).
R/W
0
N/A Do not change.
RO
0x2C
N/A Do not change.
RO
0x32
RO
0
R/W
0
RO
000000
Register 239(0xEF): Test Register 3
7-0
Reserved
Register 255(0xFF): Testing and Port 4 Control Register
7
6
Reserved
Invert phase of SMTXC clock
input for SW4-RMII
N/A Do not change.
1 = Invert the phase of SM4TXC clock input in RMII
mode, set this bit when connect SW4-RMII clock
mode to SW4-RMII normal mode for two devices
back to back connection at clock mode side of the
device only.
0 = normal phase if SM4TXC clock input
5-0
Reserved
September 2011
N/A Do not change.
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KSZ8864RMN
Static MAC Address Table
KSZ8864RMN has a static and a dynamic address table. When a DA look-up is requested, both tables will be
searched to make a packet forwarding decision. When an SA look-up is requested, only the dynamic table is
searched for aging, migration, and learning purposes. The static DA look-up result will have precedence over the
dynamic DA look-up result. If there are DA matches in both tables, the result from the static table will be used. The
static table can only be accessed and controlled by an external SPI master (usually a processor). The entries in the
static table will not be aged out by KSZ8864RMN. An external device does all addition, modification and deletion.
Note:
Register bit assignments are different for static MAC table reads and static MAC table write, as shown in the two tables below.
Address
Name
Description
Mode
Default
Format of Static MAC Table for Reads (32 entries)
63-57
FID
Filter VLAN ID, representing one of the 128 active
VLANs
RO
0000000
56
Use FID
1, use (FID+MAC) to look-up in static table.
0, use MAC only to look-up in static table.
RO
0
55
Reserved
Reserved.
RO
N/A
54
Override
1, override spanning tree “transmit enable = 0” or
“receive enable = 0* setting. This bit is used for
spanning tree implementation.
0, no override.
RO
0
53
Valid
1, this entry is valid, the look-up result will be used.
0, this entry is not valid.
RO
0
52-48
Forwarding Ports
The 5 bits control the forward ports, example:
00001, Reserved
00010, forward to Port 1
…..
10000, forward to Port 4
00110, forward to Port 1 and Port 2
11111, broadcasting (excluding the ingress port)
RO
00000
47-0
MAC Address (DA)
48 bit MAC address.
RO
0x0
W
0000000
W
0
W
0
W
0
Format of Static MAC Table for Writes (32 entries)
62-56
FID
55
Use FID
54
Override
Filter VLAN ID, representing one of the 128 active
VLANs.
1, use (FID+MAC) to look-up in static table.
0, use MAC only to look-up in static table.
1, override spanning tree “transmit enable = 0” or
“receive enable = 0” setting. This bit is used for
spanning tree implementation.
0, no override.
53
Valid
September 2011
1, this entry is valid, the look-up result will be used.
0, this entry is not valid.
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Address
KSZ8864RMN
Name
Description
Mode
Default
Forwarding Ports
The 5 bits control the forward ports, example:
00001, Reserved
00010, forward to port 1
…..
10000, forward to port 4
00110, forward to port 1 and port 2
11111, broadcasting (excluding the ingress port)
52-48
W
00000
47-0
MAC Address (DA)
48-bit MAC address.
W
0x0
Table 13. Static MAC Address Table
September 2011
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KSZ8864RMN
Examples:
(1) Static Address Table Read (read the 2nd entry)
Write to Register 110 with 0x10 (read static table selected)
Write to Register 111 with 0x1 (trigger the read operation)
Then
Read Register 113 (63-56)
Read Register 114 (55-48)
Read Register 115 (47-40)
Read Register 116 (39-32)
Read Register 117 (31-24)
Read Register 118 (23-16)
Read Register 119 (15-8)
Read Register 120 (7-0)
(2) Static Address Table Write (write the 8th entry)
Write to Register 110 with 0x10 (read static table selected)
Write Register 113 (62-56)
Write Register 114 (55-48)
Write Register 115 (47-40)
Write Register 116 (39-32)
Write Register 117 (31-24)
Write Register 118 (23-16)
Write Register 119 (15-8)
Write Register 120 (7-0)
Write to Register 110 with 0x00 (write static table selected)
Write to Register 111 with 0x7 (trigger the write operation)
September 2011
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KSZ8864RMN
VLAN Table
The VLAN table is used for VLAN table look-up. If 802.1q VLAN mode is enabled (Register 5 bit 7 = 1), this table is
used to retrieve VLAN information that is associated with the ingress packet. The fields includes FID (filter ID), Valid
and VLAN membership need initializtion, the table is blank 4096 enties after reset, due to provide 4K spacing for the
VLAN table, there is no VID filed bits, VID is used as entries address index to input up to 4096 entries with bits [12:0]
information.
Address
Name
Description
Mode
Initial Value
suggestion
R/W
0
R/W
11111
R/W
0
Format of Static VLAN Table (Support Max 4096 VLAN ID entries and 128 Active VLANs)
12
Valid
1, the entry is valid.
0, entry is invalid.
Specify which ports are members of the VLAN.
11-7
Membership
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.
E.g., 11010 means Ports 4, 3, and 1 are in this VLAN.
Last bit7 is reserved
6-0
FID
Filter ID. KSZ8864RMN supports 128 active VLANs
represented by these seven bit fields. FID is the
mapped ID. If 802.1q VLAN is enabled, the look-up will
be based on FID+DA and FID+SA.
Table 14. VLAN Table
If 802.1q VLAN mode is enabled, KSZ8864RMN assigns a VID to every ingress packet when the packet is untagged
or tagged with a null VID, 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 is used. The look-up process starts from the VLAN table look-up based on VID
number. If the entry is not valid in VLAN table, the packet is dropped and no address learning occurs. If the entry is
valid, the FID is retrieved. The FID+DA and FID+SA lookups in MAC tables are performed. The FID+DA look-up
determines the forwarding ports. If FID+DA fails for look-up in MAC table, the packet is broadcast to all the members
or specified members (excluding the ingress port) based on the VLAN table. If FID+SA fails, the FID+SA is learned. If
want to communicate between different active VLANs, set same FID, otherwise set different FID.
The VLAN table configuration is organized as 1024 VLAN sets, each VLAN set consists of 4 VLAN entries, to support
up to 4096 VLAN entries. Each VLAN set has 52 bits and should be read or written at the same time specified by the
indirect address.
The VLAN entries in the VLAN set is mapped to indirect data registers as follow:
Entry0[12:0] maps to the VLAN set bits[12-0] {register119[4:0], register120[7:0]}
Entry1[12:0] maps to the VLAN set bits[25-13]{register117[1:0], register118[7:0], register119[7:5]}
Entry2[12:0] maps to the VLAN set bits[38-26]{register116[6:0], register117[7:2]}
Entry3[12:0] maps to the VLAN set bits[51-39]{register114[3:0], register115[7:0], register116[7]}
In order to read one VLAN entry, the VLAN set is read first and the specific VLAN entry information can be extracted.
To update any VLAN entry, the VLAN set is read first then only the desired VLAN entry is updated and the whole
VLAN set is written back. Due to FID in VLAN table is 7-bit, so the VLAN table supports unique 128 flow VLAN
groups. Each VLAN set address is 10 bits long (Maximum is 1024) in the indirect address register 110 and 111, the
bit [9-8] of VLAN set address is at bit [1-0] of register 110, and the bit [7-0] of VLAN set address is at bit [7-0] of
register 111. Each Write and Read can access to four consecutive VLAN entries.
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Examples:
(1) VLAN Table Read (read the VID=2 entry)
Write the indirect control and address registers first
Write to Register 110 (0x6E) with 0x14 (read VLAN table selected)
Write to Register 111 (0x6F) with 0x0 (trigger the read operation for VID=0, 1, 2, 3 entries)
Then read the indirect data registers bits [38-26] for VID=2 entry
Read Register 116 (0x74), (register116[6:0] are bits 12-6 of VLAN VID=2 entry)
Read Register 117 (0x75), (register117[7:2] are bits 5-0 of VLAN VID=2 entry)
(2) VLAN Table Write (write the VID=10 entry)
Read the VLAN set that contains VID=8, 9, 10, 11.
Write to Register 110 (0x6E) with 0x14 (read VLAN table selected)
Write to Register 111 (0x6F) with 0x02 (trigger the read operation and VID=8, 9, 10, 11 indirect address)
Read the VLAN set first by the indirect data registers 114, 115, 116, 117, 118, 119, 120.
Modify the indirect data registers bits [38-26] by the register 116 bit [6-0] and register 117 bit [7-2] as
follows:
Write to Register 116 (0x74), (register116 [6:0] are bits 12-6 of VLAN VID=10 entry)
Write to Register 117 (0x75), (register117 [7:2] are bits 5-0 of VLAN VID=10 entry)
Then write the indirect control and address registers
Write to Register 110 (0x6E) with 0x04 (write VLAN table selected)
Write to Register 111 (0x6F) with 0x02 (trigger the write operation and VID=8, 9, 10, 11 indirect address)
The table of the follow shows the relationship of the indirect address/data registers and VLAN ID.
Indirect Address
high/low bit[9-0]
for VLAN sets
Indirect Data
Registers Bits for
each VLAN entry
VID
Numbers
VID bit[12-2] in
VLAN Tag
VID bit[1-0] in VLAN
Tag
0
Bits[12-0]
0
0
0
0
Bits[25-13]
1
0
1
0
Bits[38-26]
2
0
2
0
Bits[51-39]
3
0
3
1
Bits[12-0]
4
1
0
1
Bits[25-13]
5
1
1
1
Bits[38-26]
6
1
2
1
Bits[51-39]
7
1
3
2
Bits[12-0]
8
2
0
2
Bits[25-13]
9
2
1
2
Bits[38-26]
10
2
2
2
Bits[51-39]
11
2
3
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
1023
Bits[12-0]
4092
1023
0
1023
Bits[25-13]
4093
1023
1
1023
Bits[38-26]
4094
1023
2
1023
Bits[51-39]
4095
1023
3
Table 15. VLAN ID and Indirect Registers
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Dynamic MAC Address Table
This table is read only. The contents are maintained by the KSZ8864RMN only.
Address
Name
Description
Mode
Default
RO
1
RO
0
Format of Dynamic MAC Address Table (1K entries)
71
MAC Empty
1, there is no valid entry in the table.
0, there are valid entries in the table.
Indicates how many valid entries in the table.
0x3ff means 1K entries
70-61
No of Valid Entries
0x1 and bit 71 = 0: means 2 entries
0x0 and bit 71 = 0: means 1 entry
0x0 and bit 71 = 1: means 0 entry
60-59
Time Stamp
2-bit counters for internal aging
RO
The source port where FID+MAC is learned.
000 Port 1
58-56
Source Port
001 Port 2
RO
010 Port 3
0x0
011 Port 4
100 Port 5
1, The entry is not ready, retry until this bit is set to 0.
55
Data Ready
54-48
FID
Filter ID.
RO
0x0
47-0
MAC Address
48-bit MAC address.
RO
0x0
0, The entry is ready.
RO
Table 16. Dynamic MAC Address Table
Examples:
(1) Dynamic MAC Address Table Read (read the 1st entry), and retrieve the MAC table size
Write to Register 110 with 0x18 (read dynamic table selected)
Write to Register 111 with 0x0 (trigger the read operation) and then
Read Register 112 (71-64)
Read Register 113 (63-56); // the above two registers show # of entries
Read Register 114 (55-48) // if bit 55 is 1, restart (reread) from this register
Read Register 115 (47-40)
Read Register 116 (39-32)
Read Register 117 (31-24)
Read Register 118 (23-16)
Read Register 119 (15-8)
Read Register 120 (7-0)
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(2) Dynamic MAC Address Table Read (read the 257th entry), without retrieving # of entries information
Write to Register 110 with 0x19 (read dynamic table selected)
Write to Register 111 with 0x1 (trigger the read operation) and then
Read Register 112 (71-64)
Read Register 113 (63-56)
Read Register 114 (55-48) // if bit 55 is 1, restart (reread) from this register
Read Register 115 (47-40)
Read Register 116 (39-32)
Read Register 117 (31-24)
Read Register 118 (23-16)
Read Register 119 (15-8)
Read Register 120 (7-0)
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MIB (Management Information Base) Counters
The MIB counters are provided on per port basis. These counters are read using indirect memory access as below:
For Port 1
Offset
Counter Name
Description
0x20
RxLoPriorityByte
Rx lo-priority (default) octet count including bad packets.
0x21
RxHiPriorityByte
Rx hi-priority octet count including bad packets.
0x22
RxUndersizePkt
Rx undersize packets w/good CRC.
0x23
RxFragments
Rx fragment packets w/bad CRC, symbol errors or alignment errors.
0x24
RxOversize
Rx oversize packets w/good CRC (max: 1536 or 1522 bytes).
0x25
RxJabbers
0x26
RxSymbolError
Rx packets longer than 1522B w/either CRC errors, alignment errors, or symbol errors (depends
on max packet size setting) or Rx packets longer than 1916B only.
Rx packets w/ invalid data symbol and legal preamble, packet size.
0x27
RxCRCerror
0x28
RxAlignmentError
0x29
RxControl8808Pkts
0x2A
RxPausePkts
0x2B
RxBroadcast
0x2C
RxMulticast
0x2D
RxUnicast
Rx good multicast packets (not including MAC control frames, errored multicast packets or valid
broadcast packets).
Rx good unicast packets.
0x2E
Rx64Octets
Total Rx packets (bad packets included) that were 64 octets in length.
0x2F
Rx65to127Octets
Total Rx packets (bad packets included) that are between 65 and 127 octets in length.
0x30
Rx128to255Octets
Total Rx packets (bad packets included) that are between 128 and 255 octets in length.
0x31
Rx256to511Octets
Total Rx packets (bad packets included) that are between 256 and 511 octets in length.
0x32
Rx512to1023Octets
Total Rx packets (bad packets included) that are between 512 and 1023 octets in length.
0x33
Rx1024to1522Octets
0x34
TxLoPriorityByte
Total Rx packets (bad packets included) that are between 1024 and 1522 octets in length (upper
limit depends on max packet size setting).
Tx lo-priority good octet count, including PAUSE packets.
0x35
TxHiPriorityByte
Tx hi-priority good octet count, including PAUSE packets.
0x36
TxLateCollision
The number of times a collision is detected later than 512 bit-times into the Tx of a packet.
0x37
TxPausePkts
The number of PAUSE frames transmitted by a port.
0x38
TxBroadcastPkts
Tx good broadcast packets (not including errored broadcast or valid multicast packets).
0x39
TxMulticastPkts
Tx good multicast packets (not including errored multicast packets or valid broadcast packets).
0x3A
TxUnicastPkts
Tx good unicast packets.
0x3B
TxDeferred
Tx packets by a port for which the 1st Tx attempt is delayed due to the busy medium.
0x3C
TxTotalCollision
Tx total collision, half-duplex only.
0x3D
TxExcessiveCollision
A count of frames for which Tx fails due to excessive collisions.
0x3E
TxSingleCollision
Successfully Tx frames on a port for which Tx is inhibited by exactly one collision.
0x3F
TxMultipleCollision
Successfully Tx frames on a port for which Tx is inhibited by more than one collision.
Rx packets within (64,1522) bytes w/an integral number of bytes and a bad CRC (upper limit
depends up on max packet size setting).
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).
The number of MAC control frames received by a port with 88-08h in EtherType field.
The number of PAUSE frames received by a port. PAUSE frame is qualified with EtherType (8808h), DA, control opcode (00-01), data length (64B min), and a valid CRC.
Rx good broadcast packets (not including errored broadcast packets or valid multicast packets).
Table 17. Port-1 MIB Counter Indirect Memory Offsets
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For Port 2, the base is 0x40, same offset definition (0x40-0x5f)
For Port 3, the base is 0x60, same offset definition (0x60-0x7f)
For Port 4, the base is 0x80, same offset definition (0x80-0x9f)
Address
Name
Description
Mode
Default
RO
0
RO
0
RO
0
Mode
Default
Format of Per Port MIB Counters (16 entries)
31
Overflow
30
Count Valid
1, Counter overflow.
0, No Counter overflow.
1, Counter value is valid.
0, Counter value is not valid.
29-0
Counter Values
Counter value.
Table 18. Format of “Per Port” MIB Counter
Offset
Counter Name
Description
0x100
Reserved
Reserved.
0x101
Port1 Tx Drop Packets
Tx packets dropped due to lack of resources.
0x102
Port2 Tx Drop Packets
Tx packets dropped due to lack of resources.
0x103
Port3 Tx Drop Packets
Tx packets dropped due to lack of resources.
0x104
Port4 Tx Drop Packets
Tx packets dropped due to lack of resources.
0x105
Reserved
Reserved
0x106
Port1 Rx Drop Packets
Rx packets dropped due to lack of resources.
0x107
Port2 Rx Drop Packets
Rx packets dropped due to lack of resources.
0x108
Port3 Rx Drop Packets
Rx packets dropped due to lack of resources.
0x109
Port4 Rx Drop Packets
Rx packets dropped due to lack of resources.
Table 19. All Port Dropped Packet MIB Counters
Address
Name
Description
Format of All Port Dropped Packet MIB Counters
30-16
Reserved
Reserved.
N/A
N/A
15-0
Counter Values
Counter value.
RO
0
Table 20. Format of “All Dropped Packet” MIB Counter
Note:
All port dropped packet MIB counters Do not indicate overflow or validity; therefore the application must keep track of overflow and valid
conditions.
The KSZ8864RMN provides a total of 34 MIB counter per port. These counter are used to monitor the port detail
activity for network management and maintenance. These MIB counters are read using indirect memory access as
follows examples.
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Programming Examples:
(1) MIB counter read (read port 1 Rx64Octets counter)
Write to Register 110 with 0x1c (read MIB counters selected)
Write to Register 111 with 0x2e (trigger the read operation)
Then
Read Register 117 (counter value 31-24)
// If bit 31 = 1, there was a counter overflow
// If bit 30 = 0, restart (reread) from this register
Read Register 118 (counter value 23-16)
Read Register 119 (counter value 15-8)
Read Register 120 (counter value 7-0)
(2) MIB counter read (read port 2 Rx64Octets counter)
Write to Register 110 with 0x1c (read MIB counter selected)
Write to Register 111 with 0x4e (trigger the read operation)
Then
Read Register 117 (counter value 31-24)
//If bit 31 = 1, there was a counter overflow
//If bit 30 = 0, restart (reread) from this register
Read Register 118 (counter value 23-16)
Read Register 119 (counter value 15-8)
Read Register 120 (counter value 7-0)
(3) MIB counter read (read port 1 tx drop packets)
Write to Register 110 with 0x1d
Write to Register 111 with 0x01
Then
Read Register 119 (counter value 15-8)
Read Register 120 (counter value 7-0)
Note:
To read out all the counters, the best performance over the SPI bus is (160+3) × 8 × 80 = 104us, where there are 160 registers, three overhead,
eight clocks per access, at 12.5MHz. In the heaviest condition, the byte counter will overflow in two minutes. It is recommended that the software
read all the counters at least every 30 seconds. The per port MIB counters are designed as “read clear.” A per port MIB counter will be cleared
after it is accessed. All port 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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MIIM Registers
All the registers defined in this section can be also accessed via the SPI interface. Note: different mapping
mechanisms used for MIIM and SPI. The “PHYAD” defined in KSZ8864RMN is assigned as “0x2” for port 1, “0x3” for
port 2. The “PHYAD” of 0x1, 0x4 and 0x5 are reserved for this device, an external PHY can use other PHY address
(PHYAD) from 0x6. The “REGAD” supported are 0x0-0x5 (0h-5h), 0x1D (1dh) and 0x1F (1fh).
Address
Name
Description
Mode
Default
0
Register 0h: MII Control
15
14
Soft Reset
1, PHY soft reset.
R/W
(SC)
Loop Back
0, Normal operation.
1 = Perform MAC loopback, loop back path as follows:
R/W
0
R/W
1
R/W
1
R/W
0
R/W
0
R/W
0
R/W
0
RO
0
RO
0
R/W
1
R/W
0
R/W
0
Assume the loop-back is at port 1 MAC, port 2 is the
monitor port.
Port 1 MAC Loopback (port 1 reg. 0, bit 14 = ‘1’)
Start: RXP2/RXM2 (port 2). Can also start from
port 3, 4, 5
Loopback: MAC/PHY interface of port 1’s MAC
End: TXP2/TXM2 (port 2). Can also end at port
3, 4, 5 respectively
Setting address ox3,4,5 reg. 0, bit 14 = ‘1’ will
perform MAC loopback on port 3, 4, 5 respectively.
0 = Normal Operation.
13
Force 100
1, 100Mbps.
0, 10Mbps.
12
AN Enable
1, Auto-negotiation enabled.
0, Auto-negotiation disabled.
11
Power Down
10
PHY Isolate
1, Power down.
0, Normal operation.
1, Electrical PHY isolation of PHY from Tx+/Tx-.
0, Normal operation.
9
Restart AN
1, Restart Auto-negotiation.
0, Normal operation.
8
Force Full Duplex
1, Full duplex.
0, Half duplex.
7
Collision Test
6
Reserved
5
Hp_mdix
Not supported.
1 = HP Auto MDI/MDI-X mode
0 = Micrel Auto MDI/MDI-X mode
4
Force MDI
1, Force MDI.
0, Normal operation.
3
Disable Auto MDI/MDI-X
1, Disable auto MDI/MDI-X.
0, Normal operation.
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Address
Name
2
Disable far End fault
Description
1, Disable far end fault detection.
Mode
Default
R/W
0
R/W
0
R/W
0
0, Normal operation.
1
Disable Transmit
0
Disable LED
1, Disable transmit.
0, Normal operation.
1, Disable LED.
0, Normal operation.
Register 1h: MII Status
15
T4 Capable
0, Not 100 BASET4 capable.
RO
0
14
100 Full Capable
1, 100BASE-TX full-duplex capable.
RO
1
13
100 Half Capable
RO
1
RO
1
RO
1
RO
0
Not supported.
RO
0
1, Auto-negotiation complete.
RO
0
RO
0
RO
1
RO
0
0, Not capable of 100BASE-TX full-duplex.
1, 100BASE-TX half-duplex capable.
0, Not 100BASE-TX half-duplex capable.
12
10 Full Capable
1, 10BASE-T full-duplex capable.
0, Not 10BASE-T full-duplex capable.
11
10 Half Capable
1, 10BASE-T half-duplex capable.
0, 10BASE-T half-duplex capable.
10-7
Reserved
6
Preamble Suppressed
5
AN Complete
0, Auto-negotiation not completed.
4
far End fault
1, far end fault detected.
0, No far end fault detected.
3
AN Capable
1, Auto-negotiation capable.
0, Not auto-negotiation capable.
2
Link Status
1, Link is up.
1
Jabber Test
Not supported.
RO
0
0
Extended Capable
0, Not extended register capable.
RO
0
High order PHYID bits.
RO
0x0022
Low order PHYID bits.
RO
0x1450
Not supported.
RO
0
RO
0
RO
0
0, Link is down.
Register 2h: PHYID HIGH
15-0
Phyid High
Register 3h: PHYID LOW
15-0
Phyid Low
Register 4h: Advertisement Ability
15
Next Page
14
Reserved
13
Remote fault
September 2011
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Address
Name
12-11
Reserved
10
Pause
Description
Mode
Default
RO
0
R/W
1
R/W
0
R/W
1
R/W
1
R/W
1
R/W
1
802.3
RO
00001
1, Advertise pause ability.
0, Do not advertise pause ability.
9
Reserved
8
Adv 100 Full
1, Advertise 100 full-duplex ability.
0, Do not advertise 100 full-duplex ability.
7
Adv 100 Half
1, Advertise 100 half-duplex ability.
0, Do not advertise 100 half-duplex ability.
6
Adv 10 Full
1, Advertise 10 full-duplex ability.
0, Do not advertise 10 full-duplex ability.
5
Adv 10 Half
1, Advertise 10 half-duplex ability.
0, Do not advertise 10 half-duplex ability.
4-0
Selector Field
Register 5h: Link Partner Ability
15
Next Page
Not supported.
RO
0
14
LP ACK
Not supported.
RO
0
13
Remote fault
Not supported.
RO
0
12-11
Reserved
RO
0
10
Pause
RO
0
9
Reserved
RO
0
8
Adv 100 Full
1, link partner 100BT full-duplex capable.
0, link partner not 100BT full-duplex capable.
RO
0
7
Adv 100 Half
1, link partner 100BT half-duplex capable.
0, link partner not 100BT half-duplex capable.
RO
0
6
Adv 10 Full
1, link partner 10BT full-duplex capable.
RO
0
RO
0
RO
00001
1, link partner flow control capable.
0, link partner not flow control capable.
0, link partner not 10BT full-duplex capable.
5
Adv 10 Half
1, link partner 10BT half-duplex capable.
0, link partner not 10BT half-duplex capable.
4-0
Reserved
Register 1dh: Reserved
15
Reserved
RO
0
14-13
Reserved
RO
00
12
Reserved
RO
0
11-9
Reserved
RO
0
8-0
Reserved
RO
000000000
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Address
KSZ8864RMN
Name
Description
Mode
Default
RO
0000000000
RO
000
N/A, Do not change.
R/W
xx
1 = Polarity is reversed.
RO
0
RO
0
R/W
0
R/W
0
R/W
0
RO
0
Register 1fh: PHY Special Control/Status
15-11
Reserved
10-8
Port Operation Mode
Indication
Indicate the current state of port operation mode:
[000] = reserved.
[001] = still in auto-negotiation.
[010] = 10BASE-T half duplex.
[011] = 100BASE-TX half duplex.
[100] = reserved.
[101] = 10BASE-T full duplex.
[110] = 100BASE-TX full duplex.
[111] = PHY/MII isolate.
7-6
Reserved
5
Polrvs
0 = Polarity is not reversed.
4
MDI-X status
1 = MDI-X
0 = MDI
3
Force_lnk
1 = Force link pass.
0 = Normal operation.
2
Pwrsave
1
Remote Loopback
1 = Enable power save.
0 = Disable power save.
1 = Perform Remote loopback, loop back path as
follows:
Port 1 (PHY ID address 0x1 reg. 1f, bit 1 = ‘1’)
Start: RXP1/RXM1 (port 1)
Loopback: PMD/PMA of port 1’s PHY
End: TXP1/TXM1 (port 1)
Setting PHY ID address 0x2,3,4,5 reg. 1f, bit 1 = ‘1’
will perform remote loopback on port 2, 3, 4, 5.
0 = Normal Operation.
0
Reserved
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Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage
(VDDAR, VDDC) ..................................–0.5V to +2.4V
(VDDAT, VDDIO) .................................–0.5V to +4.0V
Input Voltage ........................................–0.5V to +4.0V
Output Voltage .....................................–0.5V to +4.0V
Lead Temperature (soldering, 10 sec.) ..............260°C
Storage Temperature (TS) ................ –55°C to +150°C
HBM ESD Rating................................................... 2KV
Supply Voltage
(VDDAR, VDDC)..............................+1.15V to +1.25V
(VDDAT)........................................+3.15V to +3.45V
(VDDIO)3.15 to 3.45V or 2.4 to 2.6V or 1.71 to 1.89V
Ambient Temperature (TA)
Commercial.....................................–0°C to +70°C
Industrial .......................................–40°C to +85°C
Max Junction Temperature (TJ) ......................... 125°C
Package Thermal Resistance(3)
Thermal Resistance (θJA) .................... 31.96°C/W
Thermal Resistance (θJC)..................... 13.54°C/W
Electrical Characteristics(4, 5)
VIN = 1.2V/3.3V (typ.); TA = 25°C
Symbol
Parameter
Condition
Min
Typ
Max
Units
100BASE-TX Operation—All Ports 100% Utilization
IDX
100BASE-TX (Transmitter) 3.3V Analog
VDDAT
54
mA
IDda
100BASE-TX 1.2V Analog
VDDAR
23
mA
IDDc
100BASE-TX 1.2V Digital
VDDC
41
mA
IDDIO
100BASE-TX (Digital IO) 3.3V Digital
VDDIO
12
mA
10BASE-T Operation —All Ports 100% Utilization
IDX
10BASE-T (Transmitter) 3.3V Analog
VDDAT
54
mA
IDda
10BASE-T 1.2V Analog
VDDAR
14
mA
IDDc
10BASE-T 1.2V Digital
VDDC
43
mA
IDDIO
10BASE-T (Digital IO) 3.3V Digital
VDDIO
12
mA
Auto-Negotiation Mode
IDX
10BASE-T (Transmitter) 3.3V Analog
VDDAT
32
mA
IDda
10BASE-T 1.2V Analog
VDDAR
24
mA
IEDM
10BASE-T 1.2V Digital
VDDC
59
mA
IDDIO
10BASE-T (Digital IO) 3.3V Digital
VDDIO
12
mA
mA
Power Management Mode
IPSM1
Power Saving Mode 3.3V
VDDAT + VDDIO
30
IPSM2
Power Saving Mode 1.2V
VDDAR + VDDC
74
mA
ISPDM1
Soft Power Down Mode 3.3V
VDDAT + VDDIO
2
mA
ISPDM2
Soft Power Down Mode 1.2V
VDDAR + VDDC
0.55
mA
IEDM1
Energy Detect Mode 3.3V
VDDAT + VDDIO
14
mA
IEDM2
Energy Detect Mode 1.2V
VDDAR + VDDC
47
mA
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Symbol
KSZ8864RMN
Parameter
Condition
Min
Typ
Max
Units
TTL Inputs
VIH
Input High Voltage (VDDIO=3.3/2.5/1.8V)
VIL
Input Low Voltage (VDDIO=3.3/2.5/1.8V)
IIN
Input Current (Excluding Pull-up/Pull-down)
2.0/2.0
/1.3
VIN = GND ~ VDDIO
V
–10
0.8/0.
6/0.3
V
10
µA
TTL Outputs
VOH
Output High Voltage (VDDIO=3.3/2.5/1.8V)
IOH = –8mA
VOL
Output Low Voltage (VDDIO=3.3/2.5/1.8V)
IOL = 8mA
IOZ
Output Tri-State Leakage
VIN = GND ~ VDDIO
2.4/1.9
/1.5
V
0.4/0.
4/0.2
V
10
µA
1.05
V
2
%
5
ns
100BASE-TX Transmit (measured differentially after 1:1 transformer)
VO
Peak Differential Output Voltage
100Ω termination on the
differential output
VIMB
Output Voltage Imbalance
100Ω termination on the
differential output
tr tt
0.95
Rise/fall Time
3
Rise/fall Time Imbalance
0
Duty Cycle Distortion
Overshoot
Output Jitters
Peak-to-peak
0.5
ns
±0.5
ns
5
%
0
0.75
1.4
ns
300
400
585
mV
2.2
2.5
2.8
V
1.4
3.5
ns
28
30
ns
10BASE-T Receive
VSQ
Squelch Threshold
5MHz square wave
10BASE-T Transmit (measured differentially after 1:1 transformer) VDDAT = 3.3V
VP
Peak Differential Output Voltage
100Ω termination on the
differential output
Output Jitters
Peak-to-peak
Rise/fall Times
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating. Unused inputs must always be tied to an appropriate logic voltage level
(ground or VDD).
3. No heat spreader in package. The thermal junction to ambient (θJA) and the thermal junction to case (θJC) are under air velocity 0m/s.
4. Specification for packaged product only. There is no an additional transformer consumption due to use on chip termination technology with
internal biasing for 10Bese-T and 100Base-TX.
5. Measurements were taken with operating ratings.
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Timing Diagrams
EEPROM Timing
Figure 13. EEPROM Interface Input Receive Timing Diagram
Figure 14. EEPROM Interface Output Transmit Timing Diagram
Symbol
Parameter
Min
Typ
Max
tCYC1
Clock Cycle
tS1
Set-Up Time
20
ns
tH1
Hold Time
20
ns
tOV1
Output Valid
16384
4096
4112
Units
ns
4128
ns
Table 21. EEPROM Timing Parameters
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MII Timing
Figure 15. MAC Mode MII Timing – Data Received from MII
Figure 16. MAC Mode MII Timing – Data Transmitted from MII
Symbol
Parameter
10Base-T/100Base-TX
Min.
Typ.
Max.
400/40
Units
tCYC3
Clock Cycle
tS3
Set-Up Time
10
ns
tH3
Hold Time
5
ns
tOV3
Output Valid
3
9
ns
25
ns
Table 22. MAC Mode MII Timing Parameters
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Figure 17. PHY Mode MII Timing – Data Received from MII
Figure 18. PHY Mode MII Timing – Data Transmitted from MII
10BaseT/100BaseT
Min
Typ
Max
Unit
s
ns
Symbol
Parameter
tCYC4
Clock Cycle
tS4
Set-Up Time
10
ns
tH4
Hold Time
0
ns
tOV4
Output Valid
10
400/40
20
25
ns
Table 23. PHY Mode MII Timing Parameters
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KSZ8864RMN
RMII Timing
tcyc
T ra n s m it
T im in g
REFCLK
t1
t2
TX_EN
T X D [1 :0 ]
Figure 19. RMII Timing – Data Received from RMII
Receive
Tim ing
tcyc
REFCLK
CRSDV
RXD[1:0]
tod
Figure 20. RMII Timing – Data Transmitted to RMII
Timing Parameter
Description
Min
Typ
Max
tcyc
Clock cycle
t1
Setup time
4
ns
t2
Hold time
2
ns
tod
Output delay
3
20
Unit
ns
14
ns
Table 24. RMII Timing Parameters
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KSZ8864RMN
SPI Timing
tSHSL
SPIS_N
tSLCH
tCHSL
tSHCH
tCHSH
SPIC
tCHCL
tDVCH
tCHDX
SPID
tCLCH
MSB
LSB
tDLDH
tDHDL
SPIQ
High Impedance
Figure 21. SPI Input Timing
Symbol
Parameter
Min
Typ
Max
Units
fC
Clock Frequency
25
MHz
tCHSL
SPIS_N Inactive Hold Time
10
ns
tSLCH
SPIS_N Active Set-Up Time
10
ns
tCHSH
SPIS_N Active Hold Time
10
ns
tSHCH
SPIS_N Inactive Set-Up Time
10
ns
tSHSL
SPIS_N Deselect Time
200
ns
tDVCH
Data Input Set-Up Time
5
ns
tCHDX
Data Input Hold Time
5
ns
tCLCH
Clock Rise Time
1
µs
tCHCL
Clock fall Time
1
µs
tDLDH
Data Input Rise Time
1
µs
tDHDL
Data Input fall Time
1
µs
Table 25. SPI Input Timing Parameters
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Figure 22. SPI Output Timing
Symbol
Parameter
Min
fC
Clock Frequency
tCLQX
SPIQ Hold Time
tCLQV
Clock Low to SPIQ Valid
tCH
Clock High Time
18
ns
tCL
Clock Low Time
18
ns
tQLQH
SPIQ Rise Time
50
ns
tQHQL
SPIQ fall Time
50
ns
tSHQZ
SPIQ Disable Time
15
ns
0
Typ
Max
Units
25
MHz
0
ns
15
ns
Table 26. SPI Output Timing Parameters
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Auto-Negotiation Timing
Figure 23: Auto-Negotiation Timing
Symbol
Parameter
tBTB
Min
Typ
Max
Units
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 pulse per burst
17
2
Ms
100
Ns
33
Table 27. Auto-Negotiation Timing Parameters
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MDC/MDIO Timing
Figure 24. MDC/MDIO Timing
Timing Parameter
Description
tP
MDC period
Min
t1MD1
MDIO (PHY input) setup to rising edge of MDC
10
tMD2
MDIO (PHY input) hold from rising edge of MDC
4
tMD3
MDIO (PHY output) delay from rising edge of MDC
Typ
400
Max
Unit
ns
ns
ns
222
ns
Table 28. MDC/MDIO Typical Timing Parameters
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Reset Timing
Figure 25. Reset Timing
Symbol
Parameter
Min
Typ
Max
Units
tSR
Stable Supply Voltages to Reset High
10
ms
tCS
Configuration Set-Up Time
50
ns
tCH
Configuration Hold Time
50
ns
tRC
Reset to Strap-In Pin Output
50
ns
tvr
3.3V rise time
100
us
Table 29. Reset Timing Parameters
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Reset Circuit Diagram
Micrel recommends the following discrete reset circuit, as shown in Figure 26, when powering up the KS8895MQ
device. For the application where the reset circuit signal comes from another device (e.g., CPU, FPGA, etc), Micrel
recommends the reset circuit, as shown in Figure 27.
Figure 26. Recommended Reset Circuit
Figure 27. Recommended Circuit for Interfacing with CPU/FPGA Reset
In the reset circuit, R, C, and D1 provide the necessary ramp rise time to reset the Micrel device. The D2 is for isolation
between Micrel device and CPU/FPGA. The reset out RST_OUT_n from CPU/FPGA can provides the warm reset after
power-up.
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Selection of Isolation Transformer(1)
One simple 1:1 isolation transformer is needed at the line interface. An isolation transformer with integrated commonmode choke is recommended for exceeding FCC requirements at line side. Request to separate the center taps of
RX/TX at chip side. Table 30 gives recommended transformer characteristics.
Characteristics Name
Value
Turns Ratio
Test Condition
1 CT : 1 CT
Open-Circuit Inductance (minimum)
350µH
100mV, 100kHz, 8mA
Leakage Inductance (maximum)
0.4µH
1MHz (min.)
Inter-Winding Capacitance (maximum)
12pF
D.C. Resistance (maximum)
0.9Ω
Insertion Loss (maximum)
1.0dB
HIPOT (minimum)
0MHz to 65MHz
1500Vrms
Table 30. Transformer Selection Criteria
Notes:
1. The IEEE 802.3u standard for 100BASE-TX assumes a transformer loss of 0.5dB. For the transmit line transformer, insertion loss of up to 1.3dB
can be compensated by increasing the line drive current by means of reducing the ISET resistor value.
2. The center taps of RX and TX should be isolated for the low power consumption.
The following transformer vendors provide compatible magnetic parts for Micrel’s device:
Single Port Integrated
Vendor
Part
Auto
MDIX
Number
of Ports
Single Port
Vendor
Part
Auto
MDIX
Number of
Ports
TDK
TLA-6T718A
Yes
1
Pulse
H1102
Yes
1
LanKom
LF-H41S
Yes
1
Bel Fuse
S558-5999-U7
Yes
1
Transpower
HB726
Yes
1
YCL
PT163020
Yes
1
Delta
LF8505
Yes
1
Datatronic
NT79075
Yes
1
Table 31. Qualified Magnetic Vendors
Selection of Reference Crystal
Chacteristics
Value
Units
25.00000
MHz
= 50
ppm
Load capacitance (maximum)
27
pF
Series resistance (max ESR)
40
Frequency
Frequency tolerance (maximum)
Table 32. Typical Reference Crystal Characteristics
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Package Information
64-Pin (8mm x 8mm) QFN Package
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
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This
information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,
specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any
intellectual property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel
assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including
liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual
property right.
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.
© 2011 Micrel, Incorporated.
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