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1. ARCHITECTURAL OVERVIEW ............................................................................................................... 1-1
Introduction to the PCI Local Bus ......................................................................................................... 1-1
S5935 Architecture................................................................................................................................ 1-2
S5935 Register Architecture ................................................................................................................. 1-2
PCI Configuration Registers ................................................................................................................. 1-2
PCI Operation Registers ....................................................................................................................... 1-3
Add-On Bus Operation Registers ......................................................................................................... 1-3
Non-Volatile Memory Interface.............................................................................................................. 1-3
Mailbox Operation................................................................................................................................. 1-4
Pass-Thru Operation............................................................................................................................. 1-5
FIFO PCI Bus Mastering Operation ...................................................................................................... 1-5
2. SIGNAL DESCRIPTIONS......................................................................................................................... 2-9
Signal Type Definition ........................................................................................................................... 2-9
Address and Data Pins – PCI Local Bus ............................................................................................ 2-10
PCI Bus Interface Signals ................................................................................................................... 2-10
System Pins – PCI Local Bus ..............................................................................................................2-11
Interface Control Pins – PCI Bus Signal...................................................................................2-11
Arbitration Pins (Bus Masters Only) – PCI Local Bus.............................................................. 2-12
Error Reporting Pins – PCI Local Bus ..................................................................................... 2-12
Interrupt Pin – PCI Local Bus .................................................................................................. 2-12
Non-Volatile Memory Interface Signals............................................................................................... 2-13
Serial nv Devices..................................................................................................................... 2-13
Byte-Wide nv Devices ............................................................................................................. 2-13
Add-On Bus Interface Signals............................................................................................................. 2-14
Register Access Pins............................................................................................................... 2-14
FIFO Access Pins .................................................................................................................... 2-15
Pass-Thru Interface Pins ......................................................................................................... 2-15
System Pins............................................................................................................................. 2-16
3. PCI CONFIGURATION REGISTERS ..................................................................................................... 3-17
PCI Configuration Space Header........................................................................................................ 3-18
Vendor Identification Register (VID).................................................................................................... 3-19
Device Identification Register (DID).................................................................................................... 3-20
PCI Command Register (PCICMD) .................................................................................................... 3-21
PCI Status Register (PCISTS) ............................................................................................................ 3-23
Revision Identification Register (RID) ................................................................................................. 3-25
Class Code Register (CLCD).............................................................................................................. 3-26
Cache Line Size Register (CALN) ...................................................................................................... 3-30
Latency Timer Register (LAT) ............................................................................................................. 3-31
Header Type Register (HDR).............................................................................................................. 3-32
Built-in Self-Test Register (BIST) ........................................................................................................ 3-33
Base Address Registers (BADR) ........................................................................................................ 3-34
Expansion ROM Base Address Register (XROM) .............................................................................. 3-38
Interrupt Line Register (INTLN)........................................................................................................... 3-40
Interrupt PIN Register (INTPIN) .......................................................................................................... 3-41
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