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Chapter 4 I/O Ports
Port 5
Figure 4-5-2 Block Diagram (P50)
Figure 4-5-3 Block Diagram (P51)
R
D
L
Q
Reset
Write
Read
R
D
L
Q
Reset
Write
Read
D
L
Q
Write
Read
Read
R
Reset
Pull-up resistor control
I/O direction control
Port output data
Serial interface 3 reception data input
Port input data
Data bus
P50
P5PLU0
P5DIR0
P5OUT0
P5IN0
4-5-3 Block Diagram
R
D
L
Q
Reset
Write
Read
R
D
L
Q
Reset
Write
Read
D
L
Q
Write
Read
Read
R
Reset
Pull-up resistor control
I/O direction control
Port output data
SC3MD1 register
SC3SBOS flag
Serial interface 3 transmission output
Port input data
Data bus
0
1
P51
P5PLU1
P5DIR1
P5OUT1
P5IN1
Read
R
D
L
Q
Reset
Write
SC3ODC0
Nch open-drain control
M
U
X