UPD78F9500MA-CAC-A Datasheet, PDF (25/342 Pages) Renesas Technology Corp – 8-Bit Single-Chip Microcontrollers

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CHAPTER 2 PIN FUNCTIONS
2.1.2 μPD78F950x
(1) Port pins
Pin Name
I/O
Function
P20
P21
P22
P23^Note
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.
P32
P34^Note
I/O
Input
Port 3
An on-chip pull-up
resistor can be
connected by setting
software.
Can be set to input or output mode in
1-bit units.
Input only
P40, P43
I/O
Port 4.
2-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.
Note For the setting method for pin functions, see CHAPTER 15 OPTION BYTE.
After Reset Alternate-Function
Pin
Input port TOH1
INTP0
−
EXCLK^Note
Input port INTP1
Input port
Input port
RESET^Note
−
Caution The P22 and P23/EXCLK pins are pulled down during reset. The P34/RESET pin is pulled up during
reset by the reset pin function/power-on clear circuit.
(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
TOH1
RESET ^Note
EXCLK^Note
Output
Input
Input
8-bit timer H1 output
System reset input
External clock input for main system clock
VDD
−
Positive power supply
VSS
−
Ground potential
Note For the setting method for pin functions, see CHAPTER 15 OPTION BYTE.
After Reset
Alternate-
Function Pin
Input port P21
P32
Input port
Input port
Input port
P20
P34^Note
P23^Note
−
−
−
−
Caution The P22 and P23/EXCLK pins are pulled down during reset. The P34/RESET pin is pulled up during
reset by the reset pin function/power-on clear circuit.
User’s Manual U18172EJ3V0UD
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