
IBM32NPCXX1EPABBE66
IBM Processor for Network Resources
Preliminary
Page iv
pnr261TOC.fm.06
August 14, 2000
3.5.27.1 DMAQS Local Descriptor Range Lower Bound Register ............................................134
3.5.27.2 DMAQS Local Descriptor Range Upper Bound Register ............................................134
3.5.28 DMAQS Event Queue Number Register .............................................................................135
3.5.29 DMAQS DMA Request Size Register .................................................................................136
3.5.30 DMAQS Enq FIFO Register ................................................................................................136
3.6 The DRAM Controllers (COMET/PAKIT) .....................................................................................137
3.6.1 Memory Reset Sequence .....................................................................................................137
3.6.2 COMET/PAKIT Control Register ...........................................................................................138
3.6.3 COMET/PAKIT Status Register ............................................................................................141
3.6.4 COMET/PAKIT Interrupt Enable Register .............................................................................142
3.6.5 COMET/PAKIT Lock Enable Register ..................................................................................142
3.6.6 COMET/PAKIT Memory Error Address Register ..................................................................143
3.6.7 COMET/PAKIT SDRAM Command and Status Register .....................................................144
3.6.8 COMET/PAKIT DRAM Refresh Rate Register .....................................................................146
3.6.9 COMET/PAKIT Syndrome Register ......................................................................................147
3.6.10 COMET/PAKIT Checkbit Inversion Register .......................................................................148
3.6.11 COMET/PAKIT Memory Controller Write Enable Register .................................................149
3.6.12 COMET/PAKIT Memory Configuration Error Sense Register .............................................150
3.7 On-chip Checksum and DRAM Test Support (CHKSM) ............................................................153
3.7.1 Software Use of CHKSM ......................................................................................................153
3.7.2 Running a TCP/IP Checksum in Packet/Control Memory .....................................................155
3.7.3 CHKSM Base Address Register ...........................................................................................155
3.7.4 CHKSM Read/Write Count Register .....................................................................................156
3.7.5 CHKSM TCP/IP Checksum Data Register ...........................................................................157
3.7.6 CHKSM Ripple Base Register ..............................................................................................158
3.7.7 CHKSM Ripple Limit Register ...............................................................................................159
3.7.8 CHKSM Interrupt Enable Register ........................................................................................159
3.7.9 CHKSM Status Register .......................................................................................................160
3.7.10 CHKSM Control Register ....................................................................................................161
3.7.11 Debugging Register Access ................................................................................................163
3.7.11.1 CHKSM Internal State .................................................................................................163
3.8 The PHY Interface (LINKC) ..........................................................................................................165
3.8.1 Functional Description ..........................................................................................................165
3.8.2 Multi-Drop .............................................................................................................................165
3.8.3 POS-PHY ..............................................................................................................................165
3.8.4 LINKC Global Control Register .............................................................................................166
3.8.5 LINKC Additional Transmit Control Register .........................................................................169
3.8.6 LINKC Configuration 0 Transmit & Receive Control Register ...............................................170
3.8.7 LINKC Configuration 1 Transmit & Receive Control Register ...............................................173
3.8.8 LINKC Configuration 2 Transmit & Receive Control Register ...............................................176
3.8.9 LINKC Configuration 3 Transmit & Receive Control Register ...............................................179
3.8.10 LINKC Map Transmit Configurations to Port Addresses .....................................................182
3.8.11 LINKC Map Receive Configurations to Port Addresses ......................................................183
3.8.12 LINKC Transmitted HEC Control Byte ................................................................................184
3.8.13 LINKC Interrupt/Status Register .........................................................................................185
3.8.14 LINKC Interrupt Enable Register ........................................................................................187
3.8.15 LINKC Prioritized Interrupts ................................................................................................187
3.8.16 LINKC Transmit State Machine Register ............................................................................188
3.8.17 LINKC Receive State Machine Register .............................................................................189
3.8.18 LINKC LAN Address Register .............................................................................................189
3.8.19 LINKC Canonical LAN Address Register ............................................................................189
3.8.20 LINKC Passed TX Data Register ........................................................................................190