Datasheet

Section 8 I/O Ports
Rev.7.00 Feb. 14, 2007 page 262 of 1108
REJ09B0089-0700
Port B MOS Pull-Up Control Register (PBPCR)
Bit : 7 6 5 4 3 2 1 0
PB7PCR PB6PCR PB5PCR PB4PCR PB3PCR PB2PCR PB1PCR PB0PCR
Initial value : 0 0 0 0 0 0 0 0
R/W : R/W R/W R/W R/W R/W R/W R/W R/W
PBPCR is an 8-bit readable/writable register that controls the MOS input pull-up function
incorporated into port B on an individual bit basis.
When PBDDR bits are cleared to 0 (input port setting) in mode 6 or 7, setting the corresponding
PBPCR bits to 1 turns on the MOS input pull-up for the corresponding pins.
PBPCR is initialized to H'00 by a reset, and in hardware standby mode. It retains its prior state in
software standby mode.
8.7.3 Pin Functions
Modes 4 and 5: In modes 4 and 5, port B pins are automatically designated as address outputs.
Port B pin functions in modes 4 and 5 are shown in figure 8.10.
A15 (output)
A14 (output)
A13 (output)
A12 (output)
A11 (output)
A10 (output)
A9 (output)
A8 (output)
Port B
Figure 8.10 Port B Pin Functions (Modes 4 and 5)