LC87F1HC4A

No.A0955-9/27

Continued from preceding page.

Pin Name

I/O

Description

Option

Port 7

• 4-bit I/O port

• I/O specifiable in 1-bit units

• Pull-up resistors can be turned on and off in 1-bit units.

• Pin functions

P70: INT0 input/HOLD reset input/timer 0L capture input/watchdog timer output

P71: INT1 input/HOLD reset input/timer 0H capture input

P72: INT2 input/HOLD reset input/timer 0 event input/timer 0L capture input/

high speed clock counter input

P73: INT3 input (input with noise filter)/timer 0 event input/timer 0H capture input/

IR remote controller receiver input

AD converter input ports: AN8(P70), AN9(P71)

Interrupt acknowledge types

Rising

Falling

Rising &

Falling

H level

L level

INT0

enable

enable

disable

enable

enable

INT1

enable

enable

disable

enable

enable

INT2

enable

enable

enable

disable

disable

INT3

enable

enable

enable

disable

disable

P70 to P73

I/O

No

PWM0

PWM1

I/O

PWM0, PWM1 output port

General-purpose input port

• Pin functions

PWM0: Audio interface master clock output

PWM1: Audio interface master clock input

No

UHD-

I/O

USB data I/O pin UHD-/general-purpose I/O port

No

UHD+

I/O

USB data I/O pin UHD+/general-purpose I/O port

No

RES

Input

Reset pin

No

XT1

Input

• 32.768kHz crystal oscillator input

• Pin functions

General-purpose input port

AD converter input ports: AN10

Must be connected to VDD1 when not to be used.

No

XT2

I/O

• 32.768kHz crystal oscillator output

• Pin functions

General-purpose I/O

AD converter input port: AN11

Must be set for oscillation and kept open if not to be used.

No

CF1

Input

Ceramic/crystal resonator input

No

CF2

Output

Ceramic/crystal resonator output

No