PI7C8152BMAE Pericom Semiconductor, PI7C8152BMAE Datasheet - Page 49

• Manufacturer Part Number: PI7C8152BMAE
• Description: IC PCI-PCI BRIDGE 2PORT 160-MQFP
• Manufacturer: Pericom Semiconductor

Specifications of PI7C8152BMAE

• Applications: *
• Interface: *
• Voltage - Supply: *
• Package / Case: 160-MQFP, 160-PQFP
• Mounting Type: Surface Mount
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3 V to 3.6 V
• Supply Current (max): 246 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Note: If parity checking is turned off and data parity errors have occurred for queued or
subsequent delayed write transactions on the initiator bus, it is possible that the initiator’s
re-attempts of the write transaction may not match the original queued delayed write
information contained in the delayed transaction queue. In this case, a master timeout
condition may occur, possibly resulting in a system error (P_SERR_L assertion).
For downstream transactions, when PI7C8152x is delivering data to the target on the
secondary bus and S_PERR_L is asserted by the target, the following events occur:
!
!
Similarly, for upstream transactions, when PI7C8152x is delivering data to the target on the
primary bus and P_PERR_L is asserted by the target, the following events occur:
!
!
A delayed write transaction is completed on the initiator bus when the initiator repeats the
write transaction with the same address, command, data, and byte enable bits as the
delayed write command that is at the head of the posted data queue. Note that the parity bit
is not compared when determining whether the transaction matches those in the delayed
transaction queues.
Two cases must be considered:
!
!
For downstream delayed write transactions, when the parity error is detected on the
initiator bus and PI7C8152x has write status to return, the following events occur:
!
!
!
Similarly, for upstream delayed write transactions, when the parity error is detected on the
initiator bus and PI7C8152x has write status to return, the following events occur:
!
PI7C8152x sets the secondary interface data parity detected bit in the secondary status
register, if the secondary parity error response bit is set in the bridge control register.
PI7C8152x captures the parity error condition to forward it back to the initiator on the
primary bus.
PI7C8152x sets the primary interface data-parity-detected bit in the status register, if
the primary parity-error-response bit is set in the command register.
PI7C8152x captures the parity error condition to forward it back to the initiator on the
secondary bus.
When parity error is detected on the initiator bus on a subsequent re-attempt of the
transaction and was not detected on the target bus
When parity error is forwarded back from the target bus
PI7C8152x first asserts P_TRDY_L and then asserts P_PERR_L two cycles later, if
the primary interface parity-error-response bit is set in the command register.
PI7C8152x sets the primary interface parity-error-detected bit in the status register.
Because there was not an exact data and parity match, the write status is not returned
and the transaction remains in the queue.
PI7C8152x first asserts S_TRDY_L and then asserts S_PERR_L two cycles later, if
the secondary interface parity-error-response bit is set in the bridge control register
(offset 3Ch).
Page 49 of 90
2-PORT PCI-TO-PCI BRIDGE
October 16, 2003 – Revision 1.11
ADVANCE INFORMATION
PI7C8152A & PI7C8152B