LC87F1A32A

No.A0704-8/26

Pin Description

Pin Name

I/O

Description

Option

VSS1,

VSS2,

VSS3

-

- power supply pin

No

VDD1,

VDD2

-

+ power supply pin

No

VDD3

-

USB reference voltage pin

Yes

Port 0

P00 to P07

I/O

• 8-bit I/O port

• I/O specifiable in 4-bit units

• Pull-up resistors can be turned on and off in 4-bit units.

• HOLD reset input

• Port 0 interrupt input

• Pins functions

AD converter input port: AN0 to AN7 (P00 to P07)

P05: System Clock Output

P06: Timer 6 toggle outputs

P07: Timer 7 toggle outputs

Yes

Port 1

P10 to P17

I/O

• 8-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

P10: SIO0 data output

P11: SIO0 data input/bus I/O

P12: SIO0 clock I/O

P13: SIO1 data output

P14: SIO1 data input/bus I/O

P15: SIO1 clock I/O

P16: Timer 1 PWML output

P17: Timer 1 PWMH output/beeper output

Yes

Port 2

• 8-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

P20 to P23: INT4 input/HOLD reset input/timer 1 event input/timer 0L capture input/

timer 0H capture input

P24 to P27: INT5 input/HOLD reset input/timer 1 event input/timer 0L capture input/

timer 0H capture input

P20: UART1 transmit

P21: UART1 receive

P22: SIO4 date I/O/parallel interface RD output

P23: SIO4 date I/O/parallel interface WR output

P24: SIO4 clock I/O

Interrupt acknowledge type

Rising

Falling

Rising &

Falling

H level

L level

INT4

enable

enable

enable

disable

disable

INT5

enable

enable

enable

disable

disable

P20 to P27

I/O

Yes

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