21555 Non-Transparent PCI-to-PCI Bridge User Manual 181
List of Registers
09h Subsystem ID [7:0]
0Ah Subsystem ID [15:8]
0Bh Primary Minimum Grant
0Ch Primary Maximum Latency
0Dh Secondary Programming Interface
0Eh Secondary Sub
-Class Code
0Fh Secondary Base Class Code
10h Secondary Minimum Grant
11h Secondary Maximum Latency
12h Downstream Memory 0 Setup [7:0]. Bits [0, 7:4] are not loaded and should be 0.
13h Downstream Memory 0 Setup [15:8]. Bits [11:8] are not loaded and should be 0.
14h Downstream Memory 0 Setup [23:16]
15h Downstream Memory 0 Setup [31:24]
16h Downstream I/O or Memory 1 Setup [7:0]. Bits [5:4] are not loaded and should be 0.
17h Downstream I/O or Memory 1 Setup [15:8]
18h Downstream I/O or Memory 1 Setup [23:16]
19h Downstream I/O or Memory 1 Setup [31:24]
1Ah Downstream Memory 2 Setup [7:0]. Bits [0, 7:4] are not loaded and should be 0.
1Bh Downstream Memory 2 Setup [15:8]. Bits [11:8] are not loaded and should be 0.
1Ch Downstream Memory 2 Setup [23:16]
1Dh Downstream Memory 2 Setup [31:24]
1Eh Downstream Memory 3 Setup [7:0]. Bits [0, 7:4] are not loaded and should be 0.
1Fh Downstream Memory 3 Setup [15:8]. Bits [11:8] are not loaded and should be 0.
20h Downstream Memory 3 Setup [23:16]
21h Downstream Memory 3 Setup [31:24]
22h Downstream Memory 3 Setup Upper 32 Bits [7:0]
23h Downstream Memory 3 Setup Upper 32 Bits [15:8]
24h Downstream Memory 3 Setup Upper 32 Bits [23:16]
25h Downstream Memory 3 Setup Upper 32 Bits [31:24]
26h
• Bit [0]: Primary Expansion ROM Setup [24] (enable)
• Bits [3:1]: Not loaded. Should be 0.
• Bits [7:4]: Primary Expansion ROM Setup [15:11]
27h Primary Expansion ROM Setup [23:16]
28h Upstream I/O or Memory 0 Setup [7:0]. Bits [5:4] are not loaded and should be 0.
29h Upstream I/O or Memory 0 Setup [15:8]
2Ah Upstream I/O or Memory 0 Setup [23:16]
Table 114. Serial Preload Sequence (Sheet 2 of 3)
Not all of the bits in the sequence are used. Bits that are not used must be 0 (zero)
Byte
offset
Description
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