![](http://datasheet.mmic.net.cn/280000/M30612MC-211FP_datasheet_16083280/M30612MC-211FP_137.png)
Mitsubishi microcomputers
M16C / 61 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Programmable I/O Port
137
Pin name
Connection
Ports P0 to P10
(excluding P8
5
)
X
OUT
(Note)
AV
SS
, V
REF
, BYTE
AV
CC
After setting for input mode, connect every pin to V
SS
via a resistor; or
after setting for output mode, leave these pins open.
Open
Connect to V
CC
Connect to V
SS
Note: With external clock input to X
IN
pin.
NMI
Connect via resistor to V
CC
(pull-up)
CNV
SS
Connect via resistor to V
SS
(pull-down)
Table 1.21.1. Example connection of unused pins in single-chip mode
Pin name
Connection
Ports P6 to P10
(excluding P8
5
)
AV
SS
, V
REF
AV
CC
After setting for input mode, connect every pin to V
SS
or V
CC
via a resistor; or
after setting for output mode, leave these pins open.
Open
Connect to V
CC
Connect to V
SS
Note: With external clock input to X
IN
pin.
HOLD, RDY, NMI
Connect via resistor to V
CC
(pull-up)
BHE, ALE, HLDA,
X
OUT
(Note), BCLK
Connect via resistor to V
SS
(pull-down) in the memory expansion mode
Connect via resistor to V
CC
(pull-up) in the microprocessor mode
CNV
SS
Figure 1.21.9. Example connection of unused pins
Port P0 to P10 (except for P8
5
)
(Inp·
(Input mode)
(Output mode)
X
OUT
AV
CC
BYTE
AV
SS
V
REF
CNV
SS
Microcomputer
V
CC
V
SS
In single-chip mode
Port P6 to P10 (except for P8
5
)
(Inpu·
(Input mode)
(Output mode)
NMI
BHE
HLDA
X
OUT
BCLK
AV
CC
AV
SS
V
REF
Open
Microcomputer
V
CC
V
SS
In memory expansion mode or
in microprocessor mode
HOLD
RDY
ALE
Open
Open
Open
·
·
0.47μs
0.47μs
CNV
SS(memory expansion mode)
CNV
SS(microprocessor mode)
Table 1.21.2.
Example connection of unused pins in memory expansion mode and microprocessor mode