PI7C9X7954AFDE Pericom Semiconductor, PI7C9X7954AFDE Datasheet - Page 55

• 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

7.2.7.
September 2009 – Revision 1.3
Pericom Semiconductor
MODEM CONTROL REGISTER – OFFSET 04h
BIT
6
7
BIT
0
1
2
3
4
5
6
7
FUNCTION
Transmission
Break
Divisor Latch
Enable
FUNCTION
DTR Pin Control
RTS Pin Control
Output 1
Output 2
Internal Loopback
Mode
AFE
Reserved
Enhanced
Transmission
09-0088
RW
RW
RW
RW
RW
RW
RW
RW
RW
TYPE
TYPE
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DESCRIPTION
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.
Autoflow Control Enable. When the AFE is enabled, autoflow
control is enabled. When it is disabled, the diagnostic mode is
enabled. In the diagnostic mode, transmitted data is immediately
received.
When AFE is set to “1”, MCR Bit 1 is used to enable and disable
the auto-RTS.
Reset to 0b.
Reset to 0b.
0b: Insert 1, 1.5 or 2 stop-bits between two transmitted
characters.
1b: Insert 0.5 stop-bits between two transmitted characters.
Note: Enabling feature may result in certain compatibility issues.
This feature is only recommended when using two Pericom
UART devices.
Reset to 0b.
MCR Bit 5
(AFE)
1
1
0
receiver of a line break condition.
1
0
x
MCR Bit 1
(RTS)
Configuration
Auto-RTS and auto-CTS are
enabled (autoflow control
enabled).
Only auto-CTS is enabled.
Auto-RTS and auto-CTS are
disabled.
PCI Express® Quad UART
PI7C9X7954
Datasheet