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Bit 1: P81/EXCAP Pin Switching (PMR81)
PMR81 sets whether the P83/EXCAP pin is used as a P81 I/O pin or an EXTTRG pin for the
capstan external synchronous signal input.
Bit 1
PMR81
Description
0
The P81/EXCAP pin functions as a P81 I/O pin
1
The P81/EXCAP pin functions as an EXCAP input pin
Bit 0: P80/EXTTRG Pin Switching (PMR80)
PMR80 sets whether the P80/EXTTRG pin is used as a P80 I/O pin or an EXTTRG pin for the
external trigger signal input.
Bit 0
PMR80
Description
0
The P80/EXTTRG pin functions as a P80 I/O pin
1
The P80/EXTTRG pin functions as an EXTTRG input pin
(2) Port Control Register 8 (PCR8)
Bit :
7
PCR87
Initial value :
0
R/W :
W
Port control register 8 (PCR8) controls the I/Os of pins P87 to P80 of port 8 in a unit of bit.
When PCR8 is set to 1, the corresponding P87 to P80 pins become output pins, and when it is set
to 0, they become input pins. When the corresponding pin is set to a general I/O, settings of
PCR8 and PDR8 become valid.
PCR8 is an 8-bit write-only register. When PCR8 is read, 1 is read. When reset, PCR8 is
initialized to H'00.
Bit n
PCR8n
Description
0
The P8n pin functions as an input pin
1
The P8n pin functions as an output pin
6
5
PCR86
PCR85
PCR84
0
0
W
W
4
3
2
PCR83
PCR82
0
0
0
W
W
W
Rev. 2.0, 11/00, page 285 of 1037
(Initial value)
(Initial value)
1
0
PCR81
PCR80
0
0
W
W
(Initial value)
(n = 7 to 0)
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