參數資料
| 型號： | PI7C9X7954AFDE |
| 廠商： | Pericom |
| 文件頁數： | 51/70頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC PCIE-TO-UART BRIDGE 128LQFP |
| 標準包裝： | 90 |
| 應用： | PCIe至UART橋接 |
| 接口： | 高級配置電源接口（ACPI） |
| 電源電壓： | 1.8V, 3.3V |
| 封裝/外殼： | 128-LQFP 裸露焊盤 |
| 供應商設備封裝： | 128-LQFP（14x14） |
| 包裝： | 托盤 |
| 安裝類型： | 表面貼裝 |
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PI7C9X7954
PCI Express Quad UART
Datasheet
Page 55 of 70
May 2013 – Revision 1.4
Pericom Semiconductor
BIT
FUNCTION
TYPE
DESCRIPTION
6
Transmission
Break
RW
0b: No transmit break condition
1b: Force the transmitter output to a space for alerting the remote
receiver of a line break condition.
Reset to 0b.
7
Divisor Latch
Enable
RW
0b: Data registers are selected
1b: Divisor latch registers are selected
Reset to 0b.
7.2.7.
MODEM CONTROL REGISTER – OFFSET 04h
BIT
FUNCTION
TYPE
DESCRIPTION
0
DTR Pin Control
RW
0b: Forces DTR output high
1b: Forces DTR output low
Reset to 0b.
1
RTS Pin Control
RW
0b: Forces RTS output high
1b: Forces RTS output low
Reset to 0b.
2
Output 1
RW
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.
3
Output 2
RW
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.
4
Internal Loopback
Mode
RW
0b: Disables Internal Loopback Mode
1b: Enables Internal Loopback Mode
Reset to 0b.
5
AFE
RW
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.
MCR Bit 5
(AFE)
MCR Bit 1
(RTS)
Configuration
1
Auto-RTS and auto-CTS are
enabled (autoflow control
enabled).
1
0
Only auto-CTS is enabled.
0
x
Auto-RTS and auto-CTS are
disabled.
Reset to 0b.
6
Reserved
Reset to 0b.
7
Enhanced
Transmission
RW
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.
13-0093
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