![](http://datasheet.mmic.net.cn/380000/-PD78F9418_datasheet_16745017/-PD78F9418_12.png)
12
μ
PD78F9418
4.2 Non-Port Pins
Pin name
I/O
Function
When reset
Also used as
INTP0
Input
Input
P24/TI0
INTP1
P25/TI1
INTP2
P26/TO5
INTP3
P27/CPT5
KR0-KR5
Input
Key return signal detection
Input
P40-P45
SI
Input
Serial data input to serial interface
Input
P22/RxD
SO
Output
Serial data output from serial interface
Input
P21/TxD
SCK
I/O
Serial clock input/output for serial interface
Input
P20/ASCK
ASCK
Input
Serial clock input to asynchronous serial interface
Input
P20/
SCK
RxD
Input
Serial data input to asynchronous serial interface
Input
P22/SI
TxD
Output
Serial data output from asynchronous serial interface
Input
P21/SO
TI0
Input
External count clock input to 8-bit timer (TM0)
Input
P24/INTP0
TI1
Input
External count clock input to 8-bit timer (TM1)
Input
P25/INTP1
TO2
Output
8-bit timer (TM2) output
Input
P23/CMPTOUT0
TO5
Output
16-bit timer (TM5) output
Input
P26/INTP2
CPT5
Input
Capture edge input
Input
P27/INTP3
CMPTOUT0
Output
Comparator output
Input
P23/TO2
CMPIN0
Input
Comparator input
Input
P60/ANI0
CMPREF0
Input
Comparator reference voltage input
Input
P61/ANI1
ANI0
Input
A/D converter analog input
Input
P60/CMPIN0
ANI1
P61/CMPREF0
ANI2-ANI6
P62-P66
AV
REF
A/D converter reference voltage
AV
SS
A/D converter ground potential
AV
DD
A/D converter analog power supply
S0-S15
Output
LCD controller/driver segment signal output
Output
S16-S19
Input
P93-P90
S20-S27
P87-P80
COM0-COM3
Output
Input
Input
Input
LCD controller/driver common signal output
Output
Input
V
LC0
-V
LC2
LCD driving voltage
BIAS
Supply voltage for LCD driving
X1
Connected to crystal for main system clock oscillation
X2
XT1
Connected to crystal for subsystem clock oscillation
XT2
RESET
System reset input
V
DD0
Positive supply voltage for ports
V
DD1
Positive supply voltage for circuits other than ports
V
SS0
Port section ground potential
V
SS1
Ground potential of circuits other than ports
V
PP
Pin for setting flash memory programming mode.
Apply a high voltage to write or verify a program.
In normal operation mode, connect the V
PP
pin directly to V
SS0
or
V
SS1
.
External interrupt input for which effective edges
(rising and/or falling edges) can be specified