PCI 9080
TABLE OF CONTENTS
PLX Technology, Inc., 1997
Page iv
Version 1.01
3.
FUNCTIONAL DESCRIPTION.......................................................................................................................................12
3.1
RESET ....................................................................................................................................................................12
3.1.1
PCI Bus Input RST# .........................................................................................................................................................12
3.1.2
Software Reset LRESETo# ..............................................................................................................................................12
3.1.3
Local Bus Input LRESETi# ...............................................................................................................................................12
3.1.4
Local Bus Output LRESETo# ...........................................................................................................................................12
3.1.5
Software Reset.................................................................................................................................................................12
3.2
PCI 9080 INITIALIZATION......................................................................................................................................12
3.2.1
Serial EEPROM Initialization ............................................................................................................................................13
3.2.2
Local Initialization .............................................................................................................................................................13
3.3
SERIAL EEPROM...................................................................................................................................................13
3.3.1
Short Serial EEPROM Load..............................................................................................................................................13
3.3.2
Long Serial EEPROM Load..............................................................................................................................................14
3.3.3
Extra Long Serial EEPROM Load.....................................................................................................................................16
3.3.4
Recommended Serial EEPROMs.....................................................................................................................................16
3.3.5
Programming the Serial EEPROM....................................................................................................................................16
3.4
INTERNAL REGISTER ACCESS ...........................................................................................................................16
3.4.1
PCI Bus Access to Internal Registers...............................................................................................................................17
3.4.2
Local Bus Access to Internal Registers ............................................................................................................................17
3.5
RESPONSE TO FIFO FULL/EMPTY......................................................................................................................18
3.6
DIRECT DATA TRANSFER MODES......................................................................................................................18
3.6.1
Direct Master Operation (Local Master to PCI Target)......................................................................................................18
3.6.1.1
Decode .........................................................................................................................................................................19
3.6.1.2
FIFOs............................................................................................................................................................................19
3.6.1.3
Memory Access ............................................................................................................................................................19
3.6.1.4
IO/CFG Access.............................................................................................................................................................20
3.6.1.5
I/O.................................................................................................................................................................................20
3.6.1.6
CFG (PCI Configuration Type 0 or Type 1 Cycles).......................................................................................................20
3.6.1.7
Direct Bus Master Lock.................................................................................................................................................21
3.6.1.8
Master/Target Abort......................................................................................................................................................21
3.6.1.9
Write and Invalidate......................................................................................................................................................21
3.6.1.9.1
DMA Write and Invalidate.......................................................................................................................................21
3.6.1.9.2
Direct Master Write and Invalidate..........................................................................................................................21
3.6.2
Direct Slave Operation (PCI Master to Local Bus Access) ...............................................................................................23
3.6.2.1
PCI 2.1 Mode................................................................................................................................................................23
3.6.2.2
PCI to Local Address Mapping .....................................................................................................................................24
3.6.2.2.1
Byte Enables ..........................................................................................................................................................24
3.6.2.2.2
Local Bus Initialization Software.............................................................................................................................25
3.6.2.2.3
PCI Initialization Software.......................................................................................................................................25