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CHAPTER 13 GENERAL PURPOSE I/O UNIT (GIU)
User’s Manual U14272EJ3V0UM
265
13.3.14 GPSICTL (0x0B00 031A)
(1/2)
Bit
15
14
13
12
11
10
9
8
Name
LOOPBK1
Reserved
Reserved
Reserved
REGRXD1
REGCTS1
REGDSR1
REGDCD1
R/W
R/W
R
R
R
R/W
R/W
R/W
R/W
RTCRST
0
0
0
0
1
1
1
1
Other resets
Note
0
0
0
Note
Note
Note
Note
Bit
7
6
5
4
3
2
1
0
Name
LOOPBK2
Reserved
Reserved
Reserved
Reserved
REGCTS2
REGDSR2
REGDCD2
R/W
R/W
R
R
R
R
R/W
R/W
R/W
RTCRST
0
0
0
0
0
1
1
1
Other resets
Note
0
0
0
0
Note
Note
Note
Bit
Name
Function
15
LOOPBK1
Loopback enable for serial interface channel 1. When GPIO pins have not been
allocated for the line status signals DSR1# and/or CTS1# of the serial interface
channel 1, this bit can be set to 1 to allow the serial interface line status output
signals to be connected to the line status input signals as follows:
DTR1# output from serial interface drives the DSR1# input to serial interface
RTS1# output from serial interface drives the CTS1# input to serial interface
14 to 12
Reserved
0 is returned when read
11
REGRXD1
RxD1 data. When a GPIO pin has not been enabled to provide RxD1, the RxD1
input to the serial interface channel 1 is driven with the value of this bit.
10
REGCTS1
CTS1# data. When the LOOPBK1 bit is reset to 0 and a GPIO pin has not been
enabled to provide CTS1#, the CTS1# input to the serial interface channel 1 is
driven with the value of this bit.
9
REGDSR1
DSR1# data. When the LOOPBK1 bit is reset to 0 and a GPIO pin has not been
enabled to provide DSR1#, the DSR1# input to the serial interface channel 1 is
driven with the value of this bit.
8
REGDCD1
DCD1# data. When a GPIO pin has not been enabled to provide DCD1#, the
DCD1# input to the serial interface channel 1 is driven with the value of this bit.
Note
Holds the value before reset