r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 641
r4f2426
Manufacturer Part Number
r4f2426
Description
16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R4F2426.pdf
(1302 pages)
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10.11
Port C is an 8-bit I/O port that also has other functions. Port C has the following registers.
• Port C data direction register (PCDDR)
• Port C data register (PCDR)
• Port C register (PORTC)
• Port C pull-up MOS control register (PCPCR)
• Port C open drain control register (PCODR)
10.11.1 Port C Data Direction Register (PCDDR)
The individual bits of PCDDR specify input or output for the pins of port C. PCDDR cannot be
read; if it is, an undefined value will be read.
Bit
7
6
5
4
3
2
1
0
Bit Name
PC7DDR
PC6DDR
PC5DDR
PC4DDR
PC3DDR
PC2DDR
PC1DDR
PC0DDR
Port C
0
0
0
0
0
0
0
0
Initial Value
R/W
W
W
W
W
W
W
W
W
Description
•
•
•
Modes 1 and 2
Port C pins are address outputs regardless of
the PCDDR settings.
Modes 7 (when EXPE = 1) and 4
Setting a PCDDR bit to 1 makes the
corresponding pin an address output, while
clearing a PCDDR to 0 makes the corresponding
pin an input port.
Mode 7 (when EXPE = 0)
Port C is an I/O port, and its pin functions can be
switched with PCDDR.
Rev. 1.00 Sep. 19, 2008 Page 613 of 1270
Section 10 I/O Ports
REJ09B0466-0100
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