TSI148-133IL IDT, Integrated Device Technology Inc, TSI148-133IL Datasheet - Page 89

• 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

3.3.1.4
Tsi148 PCI/X-to-VME Bus Bridge User Manual
80A3020_MA001_13
PCI-X Write Transaction
During write transactions, the external master writes data into the PCI-X Target write buffer.
All writes are posted and the buffer stores the data necessary to complete a PCI-X write
transfer and immediately acknowledges the transaction on the PCI-X bus. Acknowledging the
transaction frees the PCI-X bus from waiting for the potentially long VMEbus arbitration and
transfer. This allows the PCI-X bus to be used by other PCI-X bus masters while Tsi148
completes the posted write transaction on the VMEbus. If the posted write buffer is full, the
PCI-X Target retries the PCI-X bus master until there is space available in the write buffer.
The PCI-X Target write buffer has a 40 entry command queue and a 4 Kbyte data queue (see
Section 3.3.1.1 on page
combination of single and burst transactions. When a transfer is completed on the PCI-X bus,
the data is transferred to the Linkage Module. If the PCI-X Target receives a write command
that extends past the space programmed in the Target Image, the PCI-X Target accepts the
data up to the end of the Target Image and then issues a Disconnect.
82). The PCI-X Target buffer stores the commands and data in any
3. PCI/X Interface > PCI-X Mode
89