Hitachi H8S/2633 Hardware Manual page 1124

: Write to P3DDR

: Write to P3DR

: Write to P3ODR

: Read port 3

: Read P3ODR

Notes: 1. Priority order: IIC output > Serial clock output > DR output

Figure C-2 (c) Port 3 Block Diagram (Pin P32)

2. Output enable signal

3. Open drain control signal

IIC1 output enable

Serial clock output

Serial clock output

Serial clock input

Serial clock input

Interrupt controller

IRQ4 interrupt input