TSI148-133IL IDT, Integrated Device Technology Inc, TSI148-133IL Datasheet - Page 76

• Manufacturer Part Number: TSI148-133IL
• Description: IC PCI-VME BRIDGE 456PBGA
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: Tsi148&Trade;r

Specifications of TSI148-133IL

• Applications: PCI-to-VME Bridge
• Interface: PCI
• Voltage - Supply: 3.3V
• Package / Case: 456-PBGA
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 800-1905

3. PCI/X Interface > PCI Mode
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Write Transaction
During write transactions, the external master writes data into the PCI Target write buffer. All
writes are posted. The buffer stores the data necessary to complete a PCI write transfer and
immediately acknowledges the transaction on the PCI bus. Acknowledging the transaction
frees the PCI bus from waiting for the potentially long VMEbus arbitration and transfer. This
allows the PCI bus to be used by other PCI bus masters while Tsi148 completes the posted
write transaction on the VMEbus. If the posted write buffer is full, the PCI Target retries the
PCI bus master until there is space available in the write buffer.
The PCI Target write buffer includes a 40 deep command queue and a 4 Kbyte data queue.
The PCI Target write buffer stores the commands and data in any combination of single and
burst transactions. When a transfer is completed on the PCI bus, the data is transferred to the
Linkage Module.
Tsi148 PCI/X-to-VME Bus Bridge User Manual
80A3020_MA001_13