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In modes 4 and 7, when a PBDDR bit is cleared to 0 (input port setting), setting the corresponding
PBPCR bit to 1 turns on the MOS input pull-up for the corresponding pin.
PBPCR is initialized to H'00 by a reset and in hardware standby mode. It retains its prior state in
software standby mode.
5.11.3
Pin Functions
Port B pins also function as address outputs. Port B pin functions are shown in table 5.21.
Table 5.21 Port B Pin Functions
Pin
Selection Method and Pin Functions
PB7/A15
The pin function is switched as shown below according to the operating mode, bit
EXPE, and bit PBDDR.
PB6/A14
Operating
PB5/A13
mode
PB4/A12
EXPE
PB3/A11
PBDDR
PB2/A10
Pin function
PB1/A9
PB0/A8
1, 2, 5,
4
6
—
—
—
0
Address
PB
output
input
pin
pin
0
1
0
Address
PB
output
input
pin
pin
7
1
1
0
PB
PB
Address
output
input
output
pin
pin
1
pin
257
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