SH7713 datasheet(770/904 Pages) RENESAS

770 / 904 page

Section 21 I/O Ports

Rev.1.50 Aug. 30, 2006 Page 730 of 860

REJ09B0288-0150

21.2.3

Port C Data Register (PCDR)

PCDR is an 8-bit readable/writable register that stores the data for pins PTC7 to PTC0. Bits

PC7DT to PC0DT correspond to the pins PTC7 to PTC0. PCDR is initialized to H

′00 by a power-

on reset but is not initialized by a manual reset, in standby mode, or sleep mode.

Bit

Bit Name

Initial

Value

R/W

Description

PC7DT

R/W

PC6DT

R/W

PC5DT

R/W

PC4DT

R/W

PC3DT

R/W

PC2DT

R/W

PC1DT

R/W

PC0DT

R/W

When the pin function is general output port, if the port

is read, the value of the corresponding PCDR bit is

returned directly. When the function is general input

port, if the port is read, the corresponding pin level is

read. Table 21.4 shows the function of PCDR.

Table 21.4

Port C Data Register (PCDR) Read/Write Operations

PCnMD1 PCnMD0 Pin State

Read

Write

Other function

PCDR value

Value is written to PCDR, but does not

affect pin state.

Output

PCDR value

Write value is output from pin.

Input (Pull-up

MOS on)

Pin state

Value is written to PCDR, but does not

affect pin state.

Input (Pull-up

MOS off)

Pin state

Value is written to PCDR, but does not

affect pin state.

[Legend]

n = 0 to 7

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