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In modes 4 and 7, when a PCDDR bit is cleared to 0 (input port setting), setting the corresponding
PCPCR bit to 1 turns on the MOS input pull-up for the corresponding pin.
PCPCR is initialized to H'00 by a reset and in hardware standby mode. It retains its prior state in
software standby mode.
5.12.3
Pin Functions
Port C pins also function as address outputs. Port C pin functions are shown in table 5.24.
Table 5.24 Port C Pin Functions
Pin
Selection Method and Pin Functions
PC7/A7
The pin function is switched as shown below according to the operating mode, bit
EXPE, and bit PCDDR.
PC6/A6
Operating
PC5/A5
mode
PC4/A4
EXPE
PC3/A3
PCDDR
PC2/A2
Pin function
PC1/A1
PC0/A0
262
1, 2, 5,
4
6
—
—
—
0
Address
PC
output
input
pin
pin
0
1
0
Address
PC
output
input
pin
pin
7
1
1
0
PC
PC
Address
output
input
output
pin
pin
1
pin
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