參數(shù)資料
型號(hào)： PI7C7300NA
廠商： PERICOM SEMICONDUCTOR CORP
元件分類： 總線控制器
英文描述： PCI BUS CONTROLLER, PBGA272
封裝： PLASTIC, BGA-272
文件頁數(shù)： 55/119頁
文件大小： 880K
代理商： PI7C7300NA
PI7C7300
3-PORT PCI-to-PCI BRIDGE
Advanced Information
30
06/04/02 Revision 1.07
§
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 PI7C7300, and the read
transaction is not a locked transaction.
§
PI7C7300 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 PI7C7300, 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.
4.9.4.2
Target Disconnect
PI7C7300 returns a target disconnect to an initiator when one of the following
conditions is met:
§
PI7C7300 hits an internal address boundary.
§
PI7C7300 cannot accept any more write data.
§
PI7C7300 has no more read data to deliver.
See Section 4.6.4 for a description of write address boundaries, and Section 4.7.3 for
a description of read address boundaries.
4.9.4.3
Target Abort
PI7C7300 returns a target abort to an initiator when one of the following conditions is
met:
§
PI7C7300 is returning a target abort from the intended target.
When PI7C7300 returns a target abort to the initiator, it sets the signaled target abort
bit in the status register corresponding to the initiator interface.
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