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21555 Non-Transparent PCI-to-PCI Bridge User Manual 7
Contents
7 Primary PCI Bus Interface 64-Bit Extension Signals ..................................................................26
8 Secondary PCI Bus Interface Signals.........................................................................................28
9 Secondary PCI Bus Interface 64-Bit Extension Signals .............................................................30
10 Miscellaneous Signals ................................................................................................................31
11 Upstream Memory 2 Window Size .............................................................................................38
12 Bar Summary..............................................................................................................................47
13 Delayed Write Transaction Target Termination Returns ............................................................55
14 Delayed Read Transaction Target Termination Returns ............................................................56
15 Prefetch Boundaries ...................................................................................................................58
16 21555 Transaction Ordering Rules.............................................................................................62
17 Power Management, Hot-Swap, and Reset Signals...................................................................65
18 Reset Mechanisms .....................................................................................................................67
19 Power Management Actions.......................................................................................................71
20 Primary and Secondary PCI Bus Clock Signals .........................................................................77
21 PROM Interface Signals .............................................................................................................82
22 SROM Interface Signals .............................................................................................................91
23 Primary PCI Bus Arbitration Signals...........................................................................................97
24 Secondary PCI Bus Arbitration Signals ......................................................................................97
25 Arbiter Control Register ............................................................................................................100
26 Primary and Secondary PCI Bus Interrupt Signals...................................................................101
27 Primary PCI Bus Error Signals .................................................................................................105
28 Secondary PCI Bus Arbitration Signals ....................................................................................106
29 Parity Error Responses.............................................................................................................107
30 JTAG Signals............................................................................................................................111
31 Register Cross Reference Table ..............................................................................................121
32 Configuration Space Address Register.....................................................................................122
33 CSR Address Map....................................................................................................................126
34 Primary CSR and Downstream Memory 0 Bar.........................................................................130
35 Secondary CSR Memory BARs................................................................................................131
36 Primary and Secondary CSR I/O Bars .....................................................................................132
37 Downstream I/O or Memory 1 and Upstream I/O or Memory 0 BAR........................................133
38 Downstream Memory 2 and 3 BAR, and Upstream Memory 1 BAR ........................................134
39 Upper 32 Bits Downstream Memory 3 Bar ...............................................................................135
40 Upstream Memory 2 Bar...........................................................................................................135
41 Downstream I/O or Memory 1 and Upstream I/O or Memory 0 Translated Base Register ......136
42 Downstream Memory 0, 2, 3, and Upstream Memory 1 Translated Base Register .................137
43 Downstream I/O or Memory 1 and Upstream I/O or Memory 0 Setup Registers .....................138
44 Downstream Memory 0, 2, 3, and Upstream Memory 1 Setup Registers ................................139
45 Upper 32 Bits Downstream Memory 3 Setup Register .............................................................140
46 Downstream and Upstream Configuration Address Registers .................................................141
47 Downstream Configuration Data and Upstream Configuration Data Registers........................142
48 Configuration Own Bits Register...............................................................................................142
49 Configuration CSR....................................................................................................................143
50 Downstream I/O Address and Upstream I/O Address Registers..............................................144
51 Downstream I/O Data and Upstream I/O Data Registers.........................................................145
52 I/O Own Bits Registers .............................................................................................................145
53 I/O CSR ....................................................................................................................................146
54 Lookup Table Offset Register...................................................................................................146
55 Lookup Table Data Register.....................................................................................................147
56 Upstream Memory 2 Lookup Table ..........................................................................................147