262
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
PC6/A6
The pin function is switched as shown below according to the operating mode, bit
EXPE, and bit PCDDR.
PC5/A5
PC4/A4
Operating
mode
1, 2, 5,
6
4
7
PC3/A3
EXPE
—
—
0
1
PC2/A2
PCDDR
—
0
1
0
1
0
1
PC1/A1
PC0/A0
Pin function
Address
output
pin
PC
input
pin
Address
output
pin
PC
input
pin
PC
output
pin
PC
input
pin
Address
output
pin
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