PI7C7300DNAE Pericom Semiconductor, PI7C7300DNAE Datasheet - Page 28

• Manufacturer Part Number: PI7C7300DNAE
• Description: IC PCI-PCI BRIDGE 3PORT 272-BGA
• Manufacturer: Pericom Semiconductor

Specifications of PI7C7300DNAE

• Applications: *
• Interface: *
• Voltage - Supply: *
• Package / Case: 272-PBGA
• Mounting Type: Surface Mount
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3 V to 3.6 V
• Supply Current (max): 660 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.7.3
Pericom Semiconductor
Non-prefetchable behavior is used for I/O and configuration read transactions, as well as
for memory read transactions that fall into non-prefetchable memory space.
If extra read transactions could have side effects, for example, when accessing a FIFO,
use non-prefetchable read transactions to those locations. Accordingly, if it is important
to retain the value of the byte enable bits during the data phase, use non-prefetchable
read transactions. If these locations are mapped in memory space, use the memory read
command and map the target into non-prefetchable (memory-mapped I/O) memory space
to use non-prefetching behavior.
READ PREFETCH ADDRESS BOUNDARIES
PI7C7300D imposes internal read address boundaries on read pre-fetched data. When a
read transaction reaches one of these aligned address boundaries, the PI7C7300D stops
pre-fetched data, unless the target signals a target disconnect before the read pre-fetched
boundary is reached. When PI7C7300D finishes transferring this read data to the
initiator, it returns a target disconnect with the last data transfer, unless the initiator
completes the transaction before all pre-fetched read data is delivered. Any leftover pre-
fetched data is discarded.
Prefetchable read transactions in flow-through mode pre-fetch to the nearest aligned 4KB
address boundary, or until the initiator de-asserts FRAME#. Section 4.7.6 describes flow-
through mode during read operations.
Page 28 of 107
3-PORT PCI-TO-PCI BRIDGE
November 2005 - Revision 1.01
PI7C7300D