PI7C7100 View Datasheet(PDF) - Pericom Semiconductor Corporation
Part Name
Description
MFG CO.
'PI7C7100' PDF : 132 Pages View PDF
ADVANCE INFORMATION
PI7C7100
3-Port PCI Bridge 1122334455667788990011223344556677889900112233445566778899001122112233445566778899001122334455667788990011223344556677889900112211223344556677889900112233445566778899001122334455667788990011221122334455667788990011223344556677889900112233445566778899001122112233445566
12. Supported Commands
The PCI command set is given below for the primary and secondary interfaces.
12.1 Primary Interface
P_CBE[3:0]#
Command
Action
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
Interrupt Acknowledge
Special Cycle
I/O Read
I/O Write
Reserved
Reserved
Memory Read
Memory Write
Reserved
Reserved
Configuration
Read
Ignore.
Do not claim. Ignore.
1. If address is within pass through I/O range: claim and pass
through.
2. If address points to I/O mapped bridge internal register: claim and
permit access to register, do not pass through.
3. Otherwise, do not pass through and do not claim for internal access.
Same as I/O read.
-----
-----
1. If address is within pass through memory range: claim and pass
through.
2. If address is within pass through memory mapped I/O range: claim
and pass through.
3. If address points to memory mapped bridge internal register: claim
and permit access to register, do not pass through.
4. Otherwise, do not pass through and do not claim for internal access.
Same as Memory Read
-----
-----
I. Type 0 configuration read:
If the bridge's IDSEL line is asserted, perform function decode and
claim if target function is implemented, otherwise, ignore. If claimed,
permit access to target function's configuration registers. Do not pass
through under any circumstances.
II. Type 1 configuration read:
1. If the target bus is the bridge's secondary bus: claim and
pass through as a type 0 configuration read.
2. If the target bus is a subordinate bus that exists behind the
bridge (but not equal to the secondary bus): claim and
pass through as a type 1 configuration read.
3. Otherwise, ignore.
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09/18/00 Rev 1.1
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