Revision 1.02 – April 12, 2007
S5920 – PCI Product
Data Book
S5920 16-bit Mode Register Accesses ......................................................................................................... 119
16 Bit Mode Operation Register DWORD Write/Read .................................................................................. 120
MAILBOX OVERVIEW ........................................................................................................................................ 121
PASS-THRU OVERVIEW .................................................................................................................................... 121
WRITE FIFO OVERVIEW .................................................................................................................................... 121
FUNCTIONAL DESCRIPTION ............................................................................................................................ 121
Pass-Thru Transfers ...................................................................................................................................... 121
Pass-Thru Status/Control Signals ................................................................................................................. 122
BUS INTERFACE ................................................................................................................................................ 122
PCI Bus Interface .......................................................................................................................................... 122
PCI Pass-Thru Single Cycle Accesses .......................................................................................................... 123
PCI Pass-Thru Burst Accesses ..................................................................................................................... 123
PCI Disconnect Conditions ............................................................................................................................ 123
PCI Write Disconnect .................................................................................................................................... 124
PCI Read Disconnect .................................................................................................................................... 124
S5920 PASSIVE MODE OPERATION ................................................................................................................ 125
Single-Cycle PCI to Pass-Thru Write ............................................................................................................ 125
PCI To Add-On Passive Write ....................................................................................................................... 126
PCI To Add-On Passive Write w/Pass-Thru Address .................................................................................... 126
Single-Cycle PCI to Pass-Thru Read ............................................................................................................ 126
PCI To Add-On Passive Read ....................................................................................................................... 127
PCI to Pass-Thru Burst Writes ...................................................................................................................... 127
PCI to Add-On Passive Burst Write ............................................................................................................... 128
PCI to Add-On Passive Burst Write Using PTRDY# to assert Wait-States ................................................... 130
PCI to Add-On Passive Burst Read Access .................................................................................................. 130
Pass-Thru Burst Reads ................................................................................................................................. 131
PCI to Add-On Passive Burst Read ............................................................................................................... 132
Using PTRDY# to assert Wait-States ............................................................................................................ 133
8-Bit and 16-Bit Pass-Thru Add-On Bus Interface in Passive Mode ............................................................. 134
Byte Lane Steering for PCI Write (Add-On Read) ......................................................................................... 135
Byte Lane Steering for PCI Read (Add-On Write) ......................................................................................... 135
PCI to Add-On Passive Write to an 8-bit ....................................................................................................... 136
Endian Conversion ........................................................................................................................................ 137
Active Operation ............................................................................................................................................ 138
Showing Big Endian Conversion for 32-bit .................................................................................................... 138
PCI to Add-On Passive Read to an 16-bit Add-On Device ............................................................................ 138
Big Endian conversion for a 16-bit bus. The S5920 drives D[15:0] only ....................................................... 139
Big Endian conversion for an 8-bit bus. The S5920 drives D[7:0] only ......................................................... 139
Active mode PCI Read (Zero Programmed Wait States) with PTADR# ........................................................ 139
Active Mode PCI Read without PTADR# ....................................................................................................... 139
Active Mode PCI Write without PTADR# ....................................................................................................... 140
Active mode Programmable Wait States ....................................................................................................... 140
PTRDY#/PTWAIT# ........................................................................................................................................ 140
Active Mode PCI Write with Add-On Initiated Wait States Using PTWAIT# .................................................. 140
Active Mode 32-Bit PCI Write ........................................................................................................................ 141
DXFR# ........................................................................................................................................................... 141
Active Mode Figures and Descriptions .......................................................................................................... 141
AMCC Confidential and Proprietary
DS1596
7
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
