PI7C8150B datasheet(39/108 Pages) PERICOM

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PI7C8150B

ASYNCHRONOUS 2-PORT PCI-TO-PCI BRIDGE

Page 39 of 108

APRIL 2006 – Revision 2.02

The delayed transaction queue is full, and the transaction cannot be queued.

A transaction with the same address and command has been queued.

A locked sequence is being propagated across PI7C8150B, and the write transaction is

not a locked transaction.

The target bus is locked and the write transaction is a locked transaction.

Use more than 16 clocks to accept this transaction.

For delayed read transactions:

The transaction is being entered into the delayed transaction queue.

The read request has already been queued, but read data is not yet available.

Data has been read from target, but it is not yet at head of the read data queue or a

posted write transaction precedes it.

The delayed transaction queue is full, and the transaction cannot be queued.

A delayed read request with the same address and bus command has already been

queued.

A locked sequence is being propagated across PI7C8150B, and the read transaction is

not a locked transaction.

PI7C78150B is currently discarding previously pre-fetched read data.

The target bus is locked and the write transaction is a locked transaction.

Use more than 16 clocks to accept this transaction.

For posted write transactions:

The posted write data buffer does not have enough space for address and at least one

DWORD of write data.

A locked sequence is being propagated across PI7C8150B, and the write transaction is

not a locked transaction.

When a target retry is returned to the initiator of a delayed transaction, the initiator

must repeat the transaction with the same address and bus command as well as the data

if it is a write transaction, within the time frame specified by the master timeout value.

Otherwise, the transaction is discarded from the buffers.

3.8.4.2

TARGET DISCONNECT

PI7C8150B returns a target disconnect to an initiator when one of the following conditions

is met:

PI7C8150B hits an internal address boundary.

06-0044

PI7C8150B Datasheet(PDF) 39 Page - Pericom Semiconductor Corporation