D12320VF25V Datasheet, PDF (302/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 8 I/O Ports
Port C MOS Pull-Up Control Register (PCPCR)
Bit
:
7
6
5
4
3
2
1
0
PC7PCR PC6PCR PC5PCR PC4PCR PC3PCR PC2PCR PC1PCR PC0PCR
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
PCPCR is an 8-bit readable/writable register that controls the MOS input pull-up function
incorporated into port C on an individual bit basis.
When PCDDR bits are cleared to 0 (input port setting) in mode 6 or 7, setting the corresponding
PCPCR bits to 1 turns on the MOS input pull-up for the corresponding pins.
PCPCR is initialized to H'00 by a reset, and in hardware standby mode. It retains its prior state in
software standby mode.
8.8.3 Pin Functions
Modes 4 and 5: In modes 4 and 5, port C pins are automatically designated as address outputs.
Port C pin functions in modes 4 and 5 are shown in figure 8.14.
Port C
A7 (output)
A6 (output)
A5 (output)
A4 (output)
A3 (output)
A2 (output)
A1 (output)
A0 (output)
Figure 8.14 Port C Pin Functions (Modes 4 and 5)
Rev.7.00 Feb. 14, 2007 page 268 of 1108
REJ09B0089-0700