LC872G08A/06A/04A

No.A1400-9/27

Continued from preceding page.

Pin Name

I/O

Description

Option

Port 7

• 1-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

P70(AN8): AD converter input

Interrupt acknowledge types

Rising

Falling

Rising &

Falling

H level

L level

INT0

enable

enable

disable

enable

enable

P70

I/O

No

RES

I/O

External reset input / internal reset output

No

CF1/XT1

I

• Ceramic resonator or 32.768kHz crystal oscillator input pin

• Pin function

General-purpose input port

No

CF2/XT2

I/O

• Ceramic resonator or 32.768kHz crystal oscillator output pin

• Pin function

General-purpose input port

No

Port Output Types

The table below lists the types of port outputs and the presence/absence of a pull-up resistor.

Data can be read into any input port even if it is in the output mode.

Port Name

Option selected in

units of

Option type

Output type

Pull-up resistor

1

CMOS

Programmable (Note 1)

P00 to P07

1 bit

2

Nch-open drain

No

1

CMOS

Programmable

P10 to P17

1 bit

2

Nch-open drain

Programmable

1

CMOS

Programmable

P20 to P21

1 bit

2

Nch-open drain

Programmable

P70

-

No

Nch-open drain

Programmable

Note 1: The control of the presence or absence of the programmable pull-up resistors for port 0 and the switching

between low-and high-impedance pull-up connection is exercised in nibble (4-bit) units (P00 to 03 or

P04 to 07).

User Option Table

Option Name

Option Type

Mask

Version *1

Flash

Version

Option Selected in Units of

Option Selection

CMOS

P00 to P07

1 bit

Nch-open drain

CMOS

P10 to P17

1 bit

Nch-open drain

CMOS

Port output form

P20 to P21

1 bit

Nch-open drain

00000h

Program start

address

-

×

*2

-

01E00h

Enable:Use

Detect function

-

Disable:Not Used

Low-voltage

detection reset

function

Detect level

-

7-level

Power-on reset

function

Power-On reset level

-

8-level

*1: Mask option selection – No change possible after mask is completed.

*2: Program start address of the mask version is 00000h.