Pin Functions - Hitachi H8/3035 Series Hardware Manual

7.8.3 Pin Functions

The port 8 pins are also used for IRQ
functions.
Table 7-12 Port 8 Pin Functions
Pin Pin Functions and Selection Method
P8 /IRQ Bit P8 DDR selects the pin function as follows
3 3 3
P8 DDR
3
Pin function
P8 /IRQ Bit P8 DDR selects the pin function as follows
2 2 2
P8 DDR
2
Pin function
P8 /IRQ Bit P8 DDR selects the pin function as follows
1 1 1
P8 DDR
1
Pin function
P8 /IRQ Bit P8 DDR selects the pin function as follows
0 0 0
P8 DDR
0
Pin function
142
to IRQ . Table 7-12 describes the selection of pin
3 0
0
Modes 1 and 2
P8 input Illegal setting
3
IRQ
0
Modes 1 and 2
P8 input Illegal setting
2
IRQ
0
Modes 1 and 2
P8 input Illegal setting
1
IRQ
0
P8 input
0
IRQ
1
Mode 3
P8 output
3
input
3
1
Mode 3
P8 output
2
input
2
1
Mode 3
P8 output
1
input
1
1
P8 output
0
input
0