Revision 1.02 – April 12, 2007
S5920 – PCI Product
Data Book
S5920 REGISTER ARCHITECTURE .................................................................................................................... 28
PCI Configuration Registers ............................................................................................................................ 28
PCI Bus Accessible Registers ......................................................................................................................... 28
Add-On Bus Accessible Registers ................................................................................................................... 28
SERIAL NON-VOLATILE INTERFACE ................................................................................................................ 28
S5920 Pinout ................................................................................................................................................... 29
MAILBOX OPERATION ........................................................................................................................................ 30
PASS-THRU OPERATION .................................................................................................................................... 30
Mailbox Block Diagram .................................................................................................................................... 30
Pass-Thru Block Diagram ................................................................................................................................ 31
S5920 Pin Assignment .................................................................................................................................... 33
PCI Bus Address and Data Signal ................................................................................................................... 34
PCI Bus System Signals .................................................................................................................................. 35
PCI Bus Data Transfer Control Signals ........................................................................................................... 35
PCI Bus Error Reporting Signals ..................................................................................................................... 35
ADD-ON BUS AND S5920 CONTROL SIGNALS ................................................................................................ 36
Serial nvRAM Interface Signals ....................................................................................................................... 36
Direct Mailbox Access Signals ........................................................................................................................ 36
USER ADD-ON BUS PIN DESCRIPTIONS .......................................................................................................... 37
Pass-Thru Data Channel Pins ......................................................................................................................... 37
S5920 Add-On Bus Register Access Pins ....................................................................................................... 38
Add-On Bus General Pins ............................................................................................................................... 39
Configuration Registers ................................................................................................................................... 40
VENDOR IDENTIFICATION REGISTER (VID) ..................................................................................................... 42
Vendor Identification Register ......................................................................................................................... 42
DEVICE IDENTIFICATION REGISTER (DID) ....................................................................................................... 43
Device Identification Register .......................................................................................................................... 43
PCI COMMAND REGISTER (PCICMD) ................................................................................................................ 44
PCI Command Register ................................................................................................................................... 44
PCI STATUS REGISTER (PCISTS) ...................................................................................................................... 46
PCI Status Register ......................................................................................................................................... 46
REVISION IDENTIFICATION REGISTER (RID) ................................................................................................... 48
Revision Identification Register ....................................................................................................................... 48
CLASS CODE REGISTER (CLCD) ....................................................................................................................... 49
Class Code Register ........................................................................................................................................ 49
Defined Base Class Codes .............................................................................................................................. 50
Base Class Code 00h: Early, Pre-2.0 Specification Devices ........................................................................... 50
Base Class Code 01h: Mass Storage Controllers ........................................................................................... 50
Base Class Code 02h: Network Controllers .................................................................................................... 50
Base Class Code 03h: Display Controllers ...................................................................................................... 51
Base Class Code 04h: Multimedia Devices ..................................................................................................... 51
Base Class Code 05h: Memory Controllers .................................................................................................... 51
Base Class Code 06h: Bridge Devices ............................................................................................................ 52
Base Class Code 07h: Simple Communications Controllers ........................................................................... 52
Base Class Code 08h: Base System Peripherals ........................................................................................... 52
Base Class Code 09h: Input Devices .............................................................................................................. 53
Base Class Code 0Ah: Docking Stations ........................................................................................................ 53
AMCC Confidential and Proprietary
DS1596
3
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
