PI7C7300DNAE Pericom Semiconductor, PI7C7300DNAE Datasheet - Page 23

• 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

4.4
4.5
4.6
Pericom Semiconductor
Table 4-2 WRITE TRANSACTION FORWARDING
DEVICE SELECT (DEVSEL#) GENERATION
PI7C7300D always performs positive address decoding (medium decode) when
accepting transactions on either the primary or secondary buses. PI7C7300D never does
subtractive decode.
DATA PHASE
The address phase of a PCI transaction is followed by one or more data phases.
A data phase is completed when IRDY# and either TRDY# or STOP# are asserted.
A transfer of data occurs only when both IRDY# and TRDY# are asserted during the
same PCI clock cycle. The last data phase of a transaction is indicated when FRAME# is
de-asserted and both TRDY# and IRDY# are asserted, or when IRDY# and STOP# are
asserted. See Section 4.9 for further discussion of transaction termination.
Depending on the command type, PI7C7300D can support multiple data phase
PCI transactions. For detailed descriptions of how PI7C7300D imposes disconnect
boundaries, see Section 4.6.4 for write address boundaries and Section 4.7.3 read address
boundaries.
WRITE TRANSACTIONS
Write transactions are treated as either posted write or delayed write transactions.
Table 4-2 shows the method of forwarding used for each type of write operation.
Type of Transaction
Memory Write
Memory Write and Invalidate
Memory Write to VGA memory
I/O Write
Type 1 Configuration Write
Page 23 of 107
Type of Forwarding
Posted (except VGA memory)
Posted
Delayed
Delayed
Delayed
3-PORT PCI-TO-PCI BRIDGE
November 2005 - Revision 1.01
PI7C7300D