UPD78F9234MC-5A4-A Datasheet, PDF (23/419 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 2 PIN FUNCTIONS
2.1 Pin Function List
(1) Port pins
Pin Name
I/O
Function
After Reset
Alternate-
Function Pin
P00 to P03
I/O
Port 0.
Input
−
4-bit I/O port.
Can be set to input or output mode in 1-bit units.
An on-chip pull-up resistor can be connected by setting software.
P20 to P23
I/O
Port 2.
4-bit I/O port.
Can be set to input or output mode in 1-bit units.
An on-chip pull-up resistor can be connected by setting software.
Input
ANI0 to ANI3
P30
I/O
Port 3
P31
P32
Can be set to input or output mode in 1-
bit units.
An on-chip pull-up resistor can be
connected by setting software.
Input
TI000/INTP0
TI010/TO00/
INTP2
−
P33
P34^Note
Input
Input only
Input
−
RESET ^Note
P40
I/O
Port 4.
Input
−
P41
8-bit I/O port.
INTP3
Can be set to input or output mode in 1-bit units.
P42
An on-chip pull-up resistor can be connected by setting software.
TOH1
P43
TxD6/INTP1
P44
RxD6
P45
−
P46
−
P47
−
P120
P121^Note
P122^Note
P123
I/O
Port 12.
Input
−
4-bit I/O port.
Can be set to input or output mode in 1-bit units.
An on-chip pull-up resistor can be connected only to P120 and
X1^Note
X2^Note
P123 by setting software.
−
P130
Output
Port 13.
1-bit output-only port
Output
−
Note For settings of alternate function, refer to CHAPTER 18 OPTION BYTE.
Caution The P121/X1 and P122/X2 pins are pulled down during reset.
User’s Manual U17446EJ5V0UD
21