PI7C8150AMAE Pericom Semiconductor, PI7C8150AMAE Datasheet - Page 87

• Manufacturer Part Number: PI7C8150AMAE
• Description: IC PCI-PCI BRIDGE 2PORT 208-FQFP
• Manufacturer: Pericom Semiconductor

Specifications of PI7C8150AMAE

• Applications: *
• Interface: *
• Voltage - Supply: *
• Package / Case: 208-FQFP
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

06-0057
14.1.29
DIAGNOSTIC / CHIP CONTROL REGISTER – OFFSET 40h
Bit
25
26
27
31-28
Bit
0
1
3:2
4
5
7:6
8
Function
Secondary
Master Timeout
Master Timeout
Status
Discard Timer
P_SERR_L
enable
Reserved
Function
Reserved
Memory Write
Disconnect
Control
Reserved
Secondary Bus
Prefetch Disable
Live Insertion
Mode
Reserved
Chip Reset
Type
R/W
R/WC
R/W
R/O
Type
R/O
R/W
R/O
R/W
R/W
R/O
R/WR
Page 87 of 111
Description
Reserved. Returns 0 when read. Reset to 0
Controls when the bridge (as a target) disconnects memory write
transactions.
0: memory write disconnects at 4KB aligned address boundary
1: memory write disconnects at cache line aligned address boundary
Reset to 0
Reserved. Returns 0 when read. Reset to 0.
Controls the bridge’s ability to prefetch during upstream memory
read transactions.
0: The bridge prefetches and does not forward byte enable bits during
upstream memory reads.
1: The bridge requests only 1 DWORD from the target and forwards
read byte enable bits during upstream memory reads.
Reset to 0
Enables hardware control of transaction forwarding.
0: GPIO[3] has no effect on the I/O, memory, and master enable bits
1: If GPIO[3] is set to input mode, this bit enables GPIO[3] to mask
I/O enable, memory enable and master enable bits to 0. PI7C8150A
will stop accepting I/O and memory transactions as a result.
Reset to 0
Reserved. Returns 0 when read. Reset to 0
Controls the chip and secondary bus reset.
0: PI7C8150A is ready for operation
1: Causes PI7C8150A to perform a chip reset
Reserved. Returns 0 when read. Reset to 0.
Description
Set’s the maximum number of PCI clocks the bridge will wait for an
initiator on the secondary to repeat a delayed transaction request. The
counter starts right after the delayed transaction is at the front of the
queue. If the master has not repeated at least once before the counter
expires, the bridge discards the transaction from the queue.
0: 2
1: 2
Reset to 0
This bit is set to 1 when either the primary master timeout counter or
secondary master timeout counter expires.
Reset to 0
This bit is set to 1 and P_SERR_L is asserted when either the
primary discard timer or the secondary discard timer expire.
Reset to 0
15
10
PCI clocks
PCI clocks
2-PORT PCI-TO-PCI BRIDGE
APRIL 2006 – Revision 1.1
PI7C8150A