HD6473032F Datasheet, PDF (139/572 Pages) Hitachi Semiconductor – Hitachi Microcomputer

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
P1₁
0
R/W
0
P1₀
0
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.
7.2.3 Pin Functions in Each Mode
The pin functions of port 1 differ between mode 1 and modes 2 and 3 (single-chip modes). The pin
functions in each mode are described below.
124