FEDL9298-01

LAPIS Semiconductor

ML9298

4/12

PIN DESCRIPTION

Pin

I/O

Pull-up/

Pull-down

Description

DIM1

I

Pull-down

DIM2

I

Pull-down

Brightness switching pin.

A/C

I

Pull-up

Input pin with a pull-up resistor to reset the circuits inside this LSI

at a “L” level.

Set the reset pulse width to 2 ms or more.

ZA

I

Pull-up

Zero adjust pin.

HS

I

Pull-up

Hour digit adjustment pin.

MS

I

Pull-up

Minute digit adjustment pin.

BLANK

I

Pull-down

Blank input pin. Display disappears at a “L” level.

COLSEL

I



This is the input pin for selecting flashing or lighting of the colon

output.

"L" level : Flashing, "H" level : Lighting

XT

I

XT

O



Crystal oscillation pin to connect a crystal and capacitors Cx and

Cy externally.

TEST

I

Pull-up

IC testing pin. Leave this pin open or fix it to a “H” level.

F64Hz

O



64Hz signal output pin for oscillation frequency adjustment.

GR1

GR2

O



Output pins for the 1/2 duty fluorescent display tube grids.

1a, 3a to 2b, 4b, 4c

O



Output pins for the 1/2 duty fluorescent display tube anodes.





Power supply pin for high voltage.

GND





Ground pin.

VDDOUT

O



built-in regulator output pin for logic circuits. Connect the pin to

the VDDIN pin.

VDDIN

I



Power supply pin for logic circuits. Connect the pin to the

VDDOUT pin.

NC





NC pin. Leave the pin open.