HD64F2149YV datasheet(296/1075 Pages) RENESAS

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Section 8 I/O Ports

Rev. 3.00 Jan 18, 2006 page 268 of 1044

REJ09B0280-0300

8.14.2

Table 8.27 is a summary of the port C and port D registers.

Table 8.27

Port C and port D Registers

Name

Abbreviation

R/W

Initial Value

Address*

Port C data direction register

PCDDR

H'00

H'FE4E*

Port C output data register

PCODR

R/W

H'00

H'FE4C

Port C input data register

PCPIN

Undefined

H'FE4E*

Port C Nch-OD control register

PCNOCR

R/W

H'00

H'FE1C

Port D data direction register

PDDDR

H'00

H'FE4F*

Port D output data register

PDODR

R/W

H'00

H'FE4D

Port D input data register

PDPIN

Undefined

H'FE4F*

Port D Nch-OD control register

PDNOCR

R/W

H'00

H'FE1D

Notes: 1. Lower 16 bits of the address.

2. PCDDR has the same address as PCPIN.

3. PDDDR has the same address as PDPIN.

Port C and port D Data Direction Registers (PCDDR, PDDDR)

Bit

6543

210

PC7DDR PC6DDR PC5DDR PC4DDR PC3DDR PC2DDR PC1DDR PC0DDR

Initial value

0000

000

Read/Write

WWWW

WWW

Bit

6543

210

PD7DDR PD6DDR PD5DDR PD4DDR PD3DDR PD2DDR PD1DDR PD0DDR

Initial value

0000

000

Read/Write

WWWW

WWW

PCDDR and PDDDR are 8-bit write-only registers, the individual bits of which select input or

output for the pins of port C and port D. PCDDR and PDDDR are at the same addresses as PCPIN

and PDPIN, respectively, and if read, will return the port C and port D pin states.

Setting a PCDDR or PDDDR bit to 1 makes the corresponding pin on port C or port D an output

pin. Clearing the bit to 0 makes the pin an input pin.

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