H8S2245 datasheet(297/818 Pages) RENESAS

297 / 818 page

Section 8 I/O Ports

Rev.3.00 Mar. 26, 2007 Page 255 of 772

REJ09B0355-0300

• Modes 3 and 7

Setting a PCDDR bit to 1 makes the corresponding port C pin an output port, while clearing

the bit to 0 makes the pin an input port.

Note:

Modes 3 and 7 cannot be used in the H8S/2240.

Port C Data Register (PCDR)

PC7DR

R/W

PC6DR

R/W

PC5DR

R/W

PC4DR

R/W

PC3DR

R/W

PC0DR

R/W

PC2DR

R/W

PC1DR

R/W

Bit

Initial value

R/W

PCDR is an 8-bit readable/writable register that stores output data for the port C pins (PC

7 to PC0).

PCDR is initialized to H'00 by a power-on reset, and in hardware standby mode. It retains its prior

state after a manual reset, and in software standby mode.

Port C Register (PORTC)

PC7

—*

PC6

—*

PC5

—*

PC4

—*

PC3

—*

PC0

—*

PC2

—*

PC1

—*

Bit

Initial value

R/W

Note: * Determined by state of pins PC7 to PC0.

PORTC is an 8-bit read-only register that shows the pin states. It cannot be written to. Writing of

output data for the port C pins (PC

7 to PC0) must always be performed on PCDR.

If a port C read is performed while PCDDR bits are set to 1, the PCDR values are read. If a port C

read is performed while PCDDR bits are cleared to 0, the pin states are read.

After a power-on reset and in hardware standby mode, PORTC contents are determined by the pin

states, as PCDDR and PCDR are initialized. PORTC retains its prior state after a manual reset, and

in software standby mode.

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