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Rev. 1.00, 05/04, page 132 of 544
7.12 Ports C, D
Port C and port D are two sets of 8-bit I/O ports. Port C and port D have the following registers.
• Port C data direction register (PCDDR)
• Port C output data register (PCODR)
• Port C input data register (PCPIN)
• Port C Nch-OD control register (PCNOCR)
• Port D data direction register (PDDDR)
• Port D output data register (PDODR)
• Port D input data register (PDPIN)
• Port D Nch-OD control register (PDNOCR)
7.12.1 Port C and Port D Data Direction Registers (PCDDR, PDDDR)
PCDDR and PDDDR select input or output for the pins of port C and port D on a bit-by-bit basis.
Bit Bit Name
Initial
Value
R/W Description
7 PC7DDR 0 W
6 PC6DDR 0 W
5 PC5DDR 0 W
4 PC4DDR 0 W
3 PC3DDR 0 W
2 PC2DDR 0 W
1 PC1DDR 0 W
0 PC0DDR 0 W
0: Port C pin is an input pin
1: Port C pin is an output pin
PCDDR has the same address as PCPIN, and if read,
the port C pin states will be returned.
Bit Bit Name
Initial
Value R/W Description
7 PD7DDR 0 W
6 PD6DDR 0 W
5 PD5DDR 0 W
4 PD4DDR 0 W
3 PD3DDR 0 W
2 PD2DDR 0 W
1 PD1DDR 0 W
0 PD0DDR 0 W
0: Port D pin is an input pin
1: Port D pin is an output pin
PDDDR has the same address as PDPIN, and if read,
the port D pin states will be returned.