HD64F38024HV Datasheet, PDF (238/684 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 5 (PDR5)
Bit
7
6
5
4
3
2
1
0
P57
P56
P55
P54
P53
P52
P51
P50
Initial value
0
0
0
0
0
0
0
0
Read/Write R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PDR5 is an 8-bit register that stores data for port 5 pins P5₇ to P5₀. If port 5 is read while PCR5
bits are set to 1, the values stored in PDR5 are read, regardless of the actual pin states. If port 5 is
read while PCR5 bits are cleared to 0, the pin states are read.
Upon reset, PDR5 is initialized to H'00.
Port Control Register 5 (PCR5)
Bit
Initial value
Read/Write
7
PCR5₇
0
W
6
PCR5₆
0
W
5
PCR5₅
0
W
4
PCR5₄
0
W
3
PCR5₃
0
W
2
PCR5₂
0
W
1
PCR5₁
0
W
0
PCR5₀
0
W
PCR5 is an 8-bit register for controlling whether each of the port 5 pins P5₇ to P5₀ functions as an
input pin or output pin. Setting a PCR5 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin. PCR5 and PDR5 settings are valid when the
corresponding pins are designated for general-purpose input/output by PMR5 and bits SGS3 to
SGS0 in LPCR.
Upon reset, PCR5 is initialized to H'00.
PCR5 is a write-only register, which is always read as all 1s.
Rev. 8.00 Mar. 09, 2010 Page 216 of 658
REJ09B0042-0800