HD64F3039F18 Datasheet, PDF (163/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 7 I/O Ports
Port 1 Data Register (P1DR)
P1DR is an 8-bit readable/writable register that stores data for pins P1₇ to P1₀.
Bit
Initial value
Read/Write
7
P1₇
0
R/W
6
P1₆
0
R/W
5
P1₅
0
R/W
4
P1₄
0
R/W
3
P1₃
0
R/W
2
P1₂
0
R/W
1
0
P1₁
P1₀
0
0
R/W R/W
Port 1 data 7 to 0
These bits store data for port 1 pins
When a bit in P1DDR is set to 1, if port 1 is read the value of the corresponding P1DR bit is
returned directly, regardless of the actual state of the pin. When a bit in P1DDR is cleared to 0, if
port 1 is read the corresponding pin level is read.
P1DR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it
retains its previous setting.
Rev.3.00 Mar. 26, 2007 Page 139 of 682
REJ09B0353-0300