LC863432A/28A/24A/20A/16A

No.6846-8/19

Terminal

I/O

Function Description

Option

Port 7

•4-bit input/output port

Input or output can be specified for each bit

P70: I/O with programmable pull-up resister

P71 to P73: CMOS output/input with programmable pull-up

resister

•Other function

P70

P71

P72

P73

INT0 input/HOLD release input/

Nch-Tr. output for wachdog timer

INT1 input/HOLD release input

INT2 input/Timer 0 event input

INT3 input (noise rejection filter connected)

/

Timer 0 event input

Interrupt receiver format, vector addresses

rising

falling

rising/

falling

H level

L level

vector

INT0

enable

enable

disable

enable

enable

03H

INT1

enable

enable

disable

enable

enable

0BH

INT2

enable

enable

enable

disable

disable

13H

P70

P71 to P73

I/O

INT3

enable

enable

enable

disable

disable

1BH

Note: A capacitor of at least 10µF must be inserted between VDD and VSS when using this IC.

• Output form and existance of pull-up resistor for all ports can be specified for each bit.

• Programmable pull-up resistor is always connected regardless of port option, CMOS or N-ch open drain output in port 1.

• Port status in reset

Terminal

I/O

Pull-up resistor status at selecting CMOS output option

Port 0

I

Pull-up resistor OFF, ON after reset release

Port 1

I

Programmable pull-up resistor OFF