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Port 7 Data Register (P7DR)
Bit
:
7
P77DR
Initial value :
0
R/W
:
R/W
P7DR is an 8-bit readable/writable register, which stores the output data of port 7 pins (P77 to
P70).
P7DR is initialized to H'00 by a power-on reset and in hardware standby mode. The previous state
is maintained by a manual reset and in software standby mode.
Port 7 Register (PORT7)
Bit
:
7
P77
Initial value :
—*
R/W
:
R
Note: * Determined by the state of pins P77 to P70.
PORT7 is an 8-bit read-dedicated register, which reflects the state of pins. Write is disenabled.
Always carry out writing off output data of port 7 pins (P77 to P70) to P7DR without fail.
When P7DDR is set to 1, if port 7 is read, the values of P7DR are read. When P7DDR is cleared to
0, if port 7 is read, the states of pins are read out.
P7DDR and P7DR are initialized by a power-on reset and in hardware standby mode, so PORT7 is
determined by the state of the pins. The previous state is maintained by a manual reset and in
software standby mode.
6
5
P76DR
P75DR
0
0
R/W
R/W
6
5
P76
P75
—*
—*
R
R
4
3
P74DR
P73DR
0
0
R/W
R/W
4
3
P74
P73
—*
—*
R
R
2
1
P72DR
P71DR
0
0
R/W
R/W
2
1
P72
P71
—*
—*
R
R
0
P70DR
0
R/W
0
P70
—*
R
357
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