Revision 1.02 – April 12, 2007
S5920 – PCI Product
Data Book
FIFO Control/Status Register .......................................................................................................................... 77
Reset Control Register .................................................................................................................................... 78
PCI PASS-THRU CONFIGURATION REGISTER (PTCR) ................................................................................... 79
Pass-Thru Configuration Register ................................................................................................................... 79
......................................................................................................................................................................... 80
ADD-ON BUS OPERATION REGISTERS ............................................................................................................ 81
Operation Registers - Add-On Interface .......................................................................................................... 81
ADD-ON INCOMING MAILBOX REGISTER (AIMB) ............................................................................................ 82
ADD-ON OUTGOING MAILBOX REGISTER (AOMB) ......................................................................................... 82
ADD-ON PASS-THRU ADDRESS REGISTER (APTA) ........................................................................................ 82
ADD-ON PASS-THRU DATA REGISTER (APTD) ............................................................................................... 82
ADD-ON MAILBOX EMPTY/FULL STATUS REGISTER (AMBEF) ..................................................................... 83
Mailbox Empty/Full Status Register ................................................................................................................. 83
Mailbox Empty/Full Status Register ................................................................................................................. 84
ADD-ON INTERRUPT CONTROL/STATUS REGISTER (AINT) .......................................................................... 85
Add-On Interrupt Control Status Register ........................................................................................................ 85
Interrupt Control Status Register ..................................................................................................................... 86
ADD-ON RESET CONTROL REGISTER (ARCR) ................................................................................................ 87
Add-On General Control/Status Register ........................................................................................................ 87
Reset General Control/Status Register ........................................................................................................... 88
ADD-ON PASS-THRU CONFIGURATION REGISTER (APTCR) ........................................................................ 89
Pass-Thru Configuration Register ................................................................................................................... 89
Pass-thru Configuration Register .................................................................................................................... 90
INTRODUCTION ................................................................................................................................................... 91
PCI RESET ............................................................................................................................................................ 91
LOADING THE SERIAL NV MEMORY ................................................................................................................. 91
Valid External Boot Memory Contents ............................................................................................................. 92
S5920 to nvRAM Interface .............................................................................................................................. 93
Serial Interface Definition of Start and Stop .................................................................................................... 93
Serial Interface Clock Data Relationship ......................................................................................................... 93
Serial Interface Byte Access-Write .................................................................................................................. 94
Serial Interface Byte Access-Read .................................................................................................................. 94
Serial Byte Access- Sequential Read .............................................................................................................. 94
NON-VOLATILE MEMORY INTERFACE ............................................................................................................. 95
NVRAM READ/WRITE DESCRIPTION ................................................................................................................. 95
PCI BUS CONFIGURATION CYCLES .................................................................................................................. 98
PCI AD Bus Definition Type 0 Configuration Access ...................................................................................... 98
Type 0 Configuration Read Cycles .................................................................................................................. 98
Type 0 Configuration Write Cycles .................................................................................................................. 99
EXPANSION BIOS ROMS .................................................................................................................................... 99
PC Compatible Expansion ROM ..................................................................................................................... 99
PCI Data Structure ........................................................................................................................................ 101
PCI BUS INTERFACE ......................................................................................................................................... 102
PCI BUS TRANSACTIONS ................................................................................................................................. 102
PCI Bus Commands ...................................................................................................................................... 102
PCI BURST TRANSFERS ................................................................................................................................... 103
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AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
