UPD78F9234MC-5A4-A Datasheet, PDF (24/419 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 2 PIN FUNCTIONS
(2) Non-port pins
Pin Name
I/O
Function
INTP0
INTP1
Input
External interrupt input for which the valid edge (rising edge,
falling edge, or both rising and falling edges) can be specified
INTP2
INTP3
RxD6
Input
Serial data input for asynchronous serial interface
TxD6
Output Serial data output for asynchronous serial interface
TI000
Input
External count clock input to 16-bit timer/event counter 00.
Capture trigger input to capture registers (CR000 and CR010) of
16-bit timer/event counter 00
TI010
Capture trigger input to capture register (CR000) of 16-bit
timer/event counter 00
TO00
Output 16-bit timer/event counter 00 output
TOH1
Output 8-bit timer H1 output
ANI0 to ANI3 Input
Analog input of A/D converter
AVREF
−
A/D converter reference voltage input and positive power supply
for P20 to P23 and A/D converter
AVSS
RESET ^Note
−
Input
A/D converter ground potential. Make the same potential as
VSS.
System reset input
X1^Note
Input
Connection of crystal/ceramic resonator for system clock
oscillation.
External clock input
X2^Note
−
Connection of crystal/ceramic resonator for system clock
oscillation.
VDD
−
Positive power supply
VSS
−
Ground potential
Note For settings of alternate function, refer to CHAPTER 18 OPTION BYTE.
After Reset
Alternate-
Function Pin
Input
P30/TI000
P43/TxD6
P31/TI010/TO00
P41
Input
P44
Input
P43/INTP1
Input
P30/INTP0
Input
Input
Input
−
−
−
Input
P31/TO00/INTP2
P31/TI010/INTP2
P42
P20 to P23
−
−
P34^Note
P121^Note
Input
−
−
P122^Note
−
−
Caution The P121/X1 and P122/X2 pins are pulled down during reset.
22
User’s Manual U17446EJ5V0UD