參數(shù)資料
型號(hào): IT8673F
廠商: Electronic Theatre Controls, Inc.
英文描述: GT 35C 35#12 SKT PLUG
中文描述: 先進(jìn)的輸入/輸出(高級(jí)I / O)的初步規(guī)范V0.5
文件頁數(shù): 90/128頁
文件大?。?/td> 780K
代理商: IT8673F
IT8673F
(8) MODEM Control Register (MCR)
(Read/Write, Address offset=4)
Controls the interface by the modem or data set (or device emulating a modem).
0
Table 11-33. Modem Control Register Description
Bit
Default
Description
7-5
-
Reserved
4
0
Internal Loop Back
Provides a loopback feature for diagnostic test of the serial channel when it is
set high. Serial Output (SOUT) is set to the Marking State Shift Register output
loops back into the Receiver Shift Register. All Modem Control inputs (CTS#,
DSR#, RI# and DCD#) are disconnected. The four Modem Control outputs
(DTR#, RTS#, OUT1 and OUT2) are internally connected to the four Modem
Control inputs and forced to inactive high. The transmitted data are then
immediately received, allowing the processor to verify the transmit and receive
data path of the serial channel.
OUT2
This bit is the Output 2 bit and enables the serial port interrupt output by a logic
1.
Out1
This bit does not have an output pin and can only be read or written by the
CPU.
Request to Send (RTS)
Controls the Request to Send (RTS#) which is in an inverse logic state with
MCR(1).
Data Terminal Ready (DTR)
Controls the Data Terminal ready (DTR#) which is in an inverse logic state
with the MCR(0).
3
0
2
0
1
0
0
0
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