
293
P7DR is initialized to H'00 by a power-on reset and in hardware standby mode. It retains its
previous state after a manual reset and in software standby mode.
(3) Port 7 Register (PORT7)
7
P77
—*
R
6
P76
—*
R
5
P75
—*
R
4
P74
—*
R
3
P73
—*
R
0
P70
—*
R
2
P72
—*
R
1
P71
—*
R
Bit
:
Initial value :
R/W
:
Note: * Determined by the state of pins P77 to P70.
PORT7 is an 8-bit read-only register that shows the pin states. It cannot be written to. Writing of
output data for the port 7 pins (P77 to P70) must always be performed on P7DR.
If a port 7 read is performed while P7DDR bits are set to 1, the P7DR values are read. If a port 7
read is performed while P7DDR bits are cleared to 0, the pin states are read.
After a power-on reset and in hardware standby mode, PORT7 contents are determined by the pin
states, as P7DDR and P7DR are initialized. PORT7 retains its previous state after a manual reset
and in software standby mode.
(4) External Module Connection Output Pin Select Register (OPINSEL)
Bit
:
7
65
43
21
0
—
P76
STPOE
P75
MSOE
P74
DTCOE
—
Initial value :
Undefined
00
0
Undefined Undefined Undefined Undefined
R/W
:
—
R/W
—
OPINSEL is an 8-bit readable/writable register that selects whether or not output signals
(
EXDTCE, EXMSTP, EXMS) to externally connected modules are output to pins P76 to P74.
OPINSEL bits 6 to 4 are initialized to 000 by a power-on reset and in hardware standby mode.
They retain their previous states in a manual reset and in software standby mode.
Bit 7—Reserved: This bit will return an undefined value if read, and should only be written with
0.