LC87F1HC4B datasheet(9/28 Pages) ONSEMI

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LC87F1HC4B

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Pin Description

Pin Name

I/O

Description

Option

VSS1,VSS2,

VSS3

- power supply

VDD1, VDD2

+ power supply

VDD3

USB reference voltage

Yes

Port 0

I/O

 8-bit I/O ports

 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

 Pin functions

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

Onchip debugger pins: DBGP0 to DBGP2(P02 to P04)

P05: System clock output/audio interface SDAT input/output

P06: Timer 6 toggle output/audio interface BCLK input/output

P07: Timer 7 toggle output/audio interface LRCK input/output

Yes

P00 to P07

Port 1

I/O

 8-bit I/O ports

 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

P14: SIO1 data input/bus input/output

P11: SIO0 data input/bus input/output

P15: SIO1 clock input/output

P12: SIO0 clock input/output

P16: Timer 1 PWML output

P13: SIO1 data output

P17: Timer 1 PWMH output/beeper output

Yes

P10 to P17

Port 2

I/O

 8-bit I/O ports

 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: INT6 input/timer 0L capture 1 input

P22: SIO4 data input/output/parallel interface RD output

P23: SIO4 data input/output/parallel interface WR output

P24: SIO4 clock input/output/INT7 input/timer 0H capture 1 input

P25: SIO9 data input/output/parallel interface RD9 output

P26: SIO9 data input/output/parallel interface WR9 output

P27: SIO9 clock input/output

Interrupt acknowledge types

Yes

P20 to P27

Rising

Falling

Rising &

Falling

H level

L level

INT4

enable

disable

INT5

enable

disable

INT6

enable

disable

INT7

enable

disable

Port 3

I/O

 5-bit I/O ports

 I/O specifiable in 1-bit units

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

 Pin functions

P30: UART1 transmit

P31: UART1 receive

P33: Audio interface PLL filter pin (see Fig. 6.)

P34: USB interface PLL filter pin (see Fig. 5.)

Yes

P30 to P34

Continued on next page.

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