
Mitsubishi microcomputers
M16C / 61 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Programmable I/O Port
131
Figure 1.21.2. Programmable I/O ports (2)
Data bus
P8
2
to P8
4
(Note 1)
Direction register
Port latch
Pull-up selection
Input to respective peripheral functions
P7
0
Data bus
Direction register
Port latch
output
“1”
(Note 2)
P7
1
Data bus
Direction register
Port latch
Input to respective peripheral functions
(Note 2)
P8
5
Data bus
NMI interrupt input
(Note 1)
Note 1 : symbolizes a parasitic diode.
Do not apply a voltage higher than V
CC
to each port.
Note 2 : symbolizes a parasitic diode.