D12320VF25IV Datasheet, PDF (445/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 9 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 a PCDDR bit is cleared to 0 (input port setting) in mode 6 or 7, 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.
9.10.3 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 9.13.
Port C
A₇ (output)
A₆ (output)
A₅ (output)
A₄ (output)
A₃ (output)
A₂ (output)
A₁ (output)
A₀ (output)
Figure 9.13 Port C Pin Functions (Modes 4 and 5)
Rev.6.00 Sep. 27, 2007 Page 413 of 1268
REJ09B0220-0600