LC877448A/40A/32A/24A

No.7776-8/22

Pin Description

Pin name

I/O

Function

Option

VSS1,

VSS2,

VSS3

-

• Power supply (-)

No

VDD1,

VDD2,

VDD3

-

• Power supply (+)

No

PORT 0

P00 to P07

I/O

• 8 bit input / output port

• Data direction programmable in nibble units

• Use of pull-up resistor can be specified in nibble units

• Input for HOLD release

• Input for port 0 interrupt

Yes

PORT 1

P10 to P17

I/O

• 8 bit input / output port

• Data direction programmable for each bit

• Use of pull-up resistor can be specified for each bit individually

• Other pin functions

P10: SIO0 data output

P11: SIO0 data input or bus input / output

P12: SIO0 clock input / output

P13: SIO1 data output

P14: SIO1 data input or bus input / output

P15: SIO1 clock input / output

P16: Timer 1 PWML output

P17: Timer 1 PWMH output / Buzzer output

Yes

PORT 3

P30 to P35

I/O

• 6 bit input / output port

• Data direction can be specified for each bit

• Use of pull-up resistor can be specified for each bit individually

• Other functions

P30 to P33: INT4 input / HOLD release input / Timer 1 event input /

Timer 0L capture input / Timer 0H capture input

P34 to P35: INT5 input / HOLD release input / Timer 1 event input /

Timer 0L capture input / Timer 0H capture input

• Interrupt detection selection

Rising

Falling

Rising and falling

H level

L level

INT4

INT5

Yes

Yes

Yes

Yes

Yes

Yes

No

No

No

No

Yes

PORT 7

P70 to P73

I/O

• 4 bit input / output port

• Data direction can be specified for each bit

• Use of pull-up resistor can be specified for each bit individually

• Other functions

P70: INT0 input / HOLD release input / Timer 0L capture input / output for watchdog

timer

P71: INT1 input / HOLD release input / Timer 0H capture input

P72: INT2 input / HOLD release input / Timer 0 event input / Timer 0L capture input

P73: INT3 input (noise rejection filter attached) / Timer 0 event input / Timer 0H

capture input

AD input port: AN8 (P70), AN9 (P71)

• Interrupt detection selection

Rising

Falling

Rising and falling

H level

L level

INT0

INT1

INT2

INT3

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

Yes

Yes

Yes

Yes

No

No

Yes

Yes

No

No

No

PORT 8

P80 to P87

I/O

• 8 bit input / output port

• Input / output can be specified for each bit individually

• Other functions:

AD input ports: AN0 to AN7

Small signal detector input port: MICIN (P87)

No

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