1112
R
P32DDR
C
Q
D
Reset
Internal data bus
WDDR3
Reset
WDR3
R
C
Q
D
P32
RDR3
RODR3
RPOR3
SCI module
Serial clock output
enable
Serial clock input
enable
Serial clock output
IIC1 module
SDA1 output
IIC1 output enable
SDA1 input
Interrupt controller
IRQ4 interrupt input
P32DR
Reset
WODR3
R
C
Q
D
P32ODR
*
2
*
3
*
1
Serial clock input
Notes: 1. Priority order: IIC output > Serial clock output > DR output
2. Output enable signal
3. Open drain control signal
Legend
WDDR3
WDR3
WODR3
RDR3
RPOR3
RODR3
: Write to P3DDR
: Write to P3DR
: Write to P3ODR
: Read P3DR
: Read port 3
: Read P3ODR
Figure C-2 (c) Port 3 Block Diagram (Pin P32)