Port 2; Port 2 Data Direction Register (P2Ddr); Port 2 Data Register (P2Dr) - Hitachi H8S/2378, H8S/2378R Series Hardware Manual

10.2

Port 2

Port 2 is an 8-bit I/O port that also has other functions. The port 2 has the following registers.

• Port 2 data direction register (P2DDR)

• Port 2 data register (P2DR)

• Port 2 register (PORT2)
10.2.1 Port 2 Data Direction Register (P2DDR)
The individual bits of P2DDR specify input or output for the pins of port 2.
P2DDR cannot be read; if it is, an undefined value will be read.
Bit Bit Name
7 P27DDR
6 P26DDR
5 P25DDR
4 P24DDR
3 P23DDR
2 P22DDR
1 P21DDR
0 P20DDR
10.2.2 Port 2 Data Register (P2DR)
P2DR stores output data for the port 2 pins.
Bit Bit Name
7 P27DR
6 P26DR
5 P25DR
4 P24DR
3 P23DR
2 P22DR
1 P21DR
0 P20DR
Initial Value R/W
0 W
0 W
0 W
0 W
0 W
0 W
0 W
0 W
Initial Value R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
Description
When a pin function is specified to a general purpose
I/O, setting this bit to 1 makes the corresponding port
1 pin an output pin, while clearing this bit to 0 makes
the pin an input pin.
Description
Output data for a pin is stored when the pin function
is specified to a general purpose I/O.
Rev. 1.0, 09/01, page 419 of 904