HD64F38024HV Datasheet, PDF (220/684 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip Microcomputer H8 Family/H8/300L Super Low Power Series

Section 8 I/O Ports
Port Data Register 1 (PDR1)
Bit
7
6
5
4
3
2
1
0
P17
P16*
—
P14
P13
—
—
—
Initial value
0
0
—
0
0
—
—
—
Read/Write R/W
R/W
—
R/W
R/W
—
—
—
PDR1 is an 8-bit register that stores data for port 1 pins P1₇, P1₆*, P1₄, and P1₃. If port 1 is read
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 1₆ and the associated function are not implemented on the H8/38124 Group.
The register is both readable and writeable.
Port Control Register 1 (PCR1)
Bit
7
6
5
4
3
2
1
0
PCR17 PCR16* —
PCR14 PCR13
—
—
—
Initial value
0
0
—
0
0
—
—
—
Read/Write
W
W
W
W
W
W
W
W
PCR1 is an 8-bit register for controlling whether each of the port 1 pins P1₇, P1₆*, P1₄, and P1₃
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 1₆ and the associated function are not implemented on the H8/38124 Group.
Rev. 8.00 Mar. 09, 2010 Page 198 of 658
REJ09B0042-0800