PI7C9X7954AFDE Pericom Semiconductor, PI7C9X7954AFDE Datasheet - Page 47

• 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

7.1.7.
September 2009 – Revision 1.3
Pericom Semiconductor
MODEM CONTROL REGISTER – OFFSET 04h
BIT
1:0
2
5:3
6
7
BIT
0
1
2
3
4
FUNCTION
Data Length
Stop-Bit Length
Parity Type
Transmission
Break
Divisor Latch
Enable
FUNCTION
DTR Pin Control
RTS Pin Control
Output 1
Output 2
Internal Loopback
Mode
09-0088
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
TYPE
TYPE
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DESCRIPTION
00b: 5-bit data length
01b: 6-bit data length
10b: 7-bit data length
11b: 8-bit data length
Reset to 11b.
Reset to 0b.
Reset to 000b.
0b: No transmit break condition
1b: Force the transmitter output to a space for alerting the remote
Reset to 0b.
0b: Data registers are selected
1b: Divisor latch registers are selected
Reset to 0b.
DESCRIPTION
0b: Forces DTR output high
1b: Forces DTR output low
Reset to 0b.
0b: Forces RTS output high
1b: Forces RTS output low
Reset to 0b.
When the Internal Loopback Mode is enabled by setting Modem
Control Register Bit[4], output of the Output1 is routed to RI.
Reset to 0b.
When the Internal Loopback Mode is enabled by setting Modem
Control Register Bit[4], output of the Output2 is routed to DCD.
Reset to 0b.
0b: Disables Internal Loopback Mode
1b: Enables Internal Loopback Mode
Reset to 0b.
Bit 2 value
0
1
1
Bit 5
X
0
0
1
1
receiver of a line break condition.
Bit 4
X
0
1
0
1
Data length
5,6,7,8
5
6,7,8
Bit 3
0
1
1
1
1
Parity selection
No parity
Odd parity
Even parity
Mark
Space
PCI Express® Quad UART
Stop bit length
1
1.5
2
PI7C9X7954
Datasheet