hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 238

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Section 8 I/O Ports
Port Data Register 1 (PDR1)
PDR1 is an 8-bit register that stores data for port 1 pins P1
while PCR1 bits are set to 1, the values stored in PDR1 are read, regardless of the actual pin states.
If port 1 is read while PCR1 bits are cleared to 0, the pin states are read.
Note: * Pin 1
Port Control Register 1 (PCR1)
PCR1 is an 8-bit register for controlling whether each of the port 1 pins P1
functions as an input pin or output pin. Setting a PCR1 bit to 1 makes the corresponding pin an
output pin, while clearing the bit to 0 makes the pin an input pin. The settings in PCR1 and in
PDR1 are valid only when the corresponding pin is designated in PMR1 as a general I/O pin.
PCR1 is a write-only register, which is always read as all 1s.
Note: * Pin 1
Rev. 7.00 Mar 10, 2005 page 196 of 652
REJ09B0042-0700
Bit
Initial value
Read/Write
Bit
Initial value
Read/Write
The register is both readable and writeable.
6
6
and the associated function are not implemented on the H8/38124 Group.
and the associated function are not implemented on the H8/38124 Group.
PCR1
R/W
P1
W
7
0
7
0
7
7
PCR1
P1
R/W
W
6
0
6
0
6
*
6
*
—
—
—
—
—
W
5
5
PCR1
R/W
P1
W
4
0
4
0
4
4
7
PCR1
, P1
R/W
P1
W
3
0
3
0
6
3
*, P1
3
4
, and P1
—
—
—
—
—
W
2
2
7
, P1
3
. If port 1 is read
6
*, P1
—
—
—
—
—
W
1
1
4
, and P1
—
—
—
—
—
W
0
0
3