PI7C9X7954AFDE Pericom Semiconductor, PI7C9X7954AFDE Datasheet - Page 51

• Manufacturer Part Number: PI7C9X7954AFDE
• Description: IC PCIE-TO-UART BRIDGE 128LQFP
• Manufacturer: Pericom Semiconductor

Specifications of PI7C9X7954AFDE

• Applications: PCIe-to-Uart Bridge
• Interface: Advanced Configuration Power Interface (ACPI)
• Voltage - Supply: 1.8V, 3.3V
• Package / Case: 128-LQFP
• Mounting Type: Surface Mount
• Transmitter And Receiver Fifo Counter: Yes
• Package Type: LQFP
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.2. Registers in Memory-Mapping Mode
Each UART channel has a dedicated 512-byte register block in Memory mode. The register block can be
accessed by the UART Memory Base Address, which is obtained by adding the UART Register Offset to
the content of the Base Address Register 1 (BAR1). The following diagram shows the arrangement of
individual UART register blocks.
September 2009 – Revision 1.3
Pericom Semiconductor
Table 7-3 UART Base Address in Memory Mode
UART
UART0
UART1
UART2
UART3
Figure 7-2 UART Register Block Arrangement in Memory Mode
UART Register Offset
UART I/O Base Address
BAR1 + 0000h
BAR1 + 0200h
BAR1 + 0400h
BAR1 + 0E00h
09-0088
(BAR1 + UART Register Offset)
UART Memory Base Address
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0000h
0200h
0E00h
0400h
UART0 Registers
UART1 Registers
UART2 Registers
UART3 Registers
PCI Express® Quad UART
PI7C9X7954
Datasheet