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Chapter 4 I/O Ports
IV - 34
Port 7
Figure 4-7-5 Block Diagram (P72 )
Read
R
D
L
Q
Reset
Write
Read
R
D
L
Q
Reset
Write
Read
R
D
L
Q
Reset
Write
Read
Read
R
Reset
D
L
Q
Write
Pull-up/down resistor control
Pull-up/down resistor selection
I/O direction control
Port output data
Port input data
Data bus
P72
P7PLUD2
P7DIR2
FLOAT(bp4)
P7OUT2
P7IN0
Serial interface 0 clock output
0
1
SC0MD1 register
SC0SBOS flag
Serial interface 0 clock input
Read
R
D
L
Q
Reset
Write
SC0ODC3
Nch open-drain control
M
U
X
Figure 4-7-6 Block Diagram (P72 )
Read
R
D
L
Q
Reset
Write
Read
R
D
L
Q
Reset
Write
Read
R
D
L
Q
Reset
Write
Read
Read
R
Reset
D
L
Q
Write
Pull-up/down resistor control
Pull-up/down resistor selection
I/O direction control
Port output data
Port input data
Data bus
P73
P7PLUD3
P7DIR3
FLOAT(bp4)
P7OUT3
P7IN3
Serial interface 1 transmission data output
UART transmission data output
0
1
SC1MD1 register
SC1SBOS flag
M
U
X