H8S2245 datasheet(303/818 Pages) RENESAS

303 / 818 page

Section 8 I/O Ports

Rev.3.00 Mar. 26, 2007 Page 261 of 772

REJ09B0355-0300

Port D Data Register (PDDR)

PD7DR

R/W

PD6DR

R/W

PD5DR

R/W

PD4DR

R/W

PD3DR

R/W

PD0DR

R/W

PD2DR

R/W

PD1DR

R/W

Bit

Initial value

R/W

PDDR is an 8-bit readable/writable register that stores output data for the port D pins (PD

7 to PD0).

PDDR 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 D Register (PORTD)

PD7

—*

PD6

—*

PD5

—*

PD4

—*

PD3

—*

PD0

—*

PD2

—*

PD1

—*

Bit

Initial value

R/W

Note: * Determined by state of pins PD7 to PD0.

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

output data for the port D pins (PD

7 to PD0) must always be performed on PDDR.

If a port D read is performed while PDDDR bits are set to 1, the PDDR values are read. If a port D

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

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

states, as PDDDR and PDDR are initialized. PORTD retains its prior state after a manual reset,

and in software standby mode.

H8S2245 Datasheet(PDF) 303 Page - Renesas Technology Corp

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