FEDL9098B-01

ML9098B

4/15

PIN DESCRIPTION

Pin

I/O

Pull-up/

Pull-down

Description

COM1

O



Output pin for LCD common driver.

COM2

O



Output pin for 1/2-duty mode LCD common driver.

A/C

I

Pull-up

Pin for clearing all circuits. This pin is placed normally at a "H" level with

an internal pull-up resistor. The counters and frequency divider are

reset when this pin goes at a “L” level.

H

I

Pull-up

Hour adjustment pin (for general areas). This pin is placed normally at a

"H" level with an internal pull-up resistor. The "Hour" indication is fast

forwarded at 2 Hz when this pin is low.

M

I

Pull-up

Minute adjustment pin. This pin is placed normally at a "H" level with an

internal pull-up resistor. The "Minute" indication is fast forwarded at 2

Hz when this pin is low.

BLANK

I



Display ON/OFF pin. "L" level: Display Off, “H" level: Display On.

COL_SEL

I



Pin for selecting the colon output as "Flashing" or "Lighting".

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

Xin

I

Xout

O



Crystal oscillation pins for connecting a crystal and the capacitors (Cin

and Cout) externally.

SET

I

Pull-up

Zero adjustment pin. This pin is placed normally at a "H" level with an

internal pull-up resistor. The clock provides 30-minute adjustment when

this pin is low.

64HZ

O



64Hz output pin

SEG1 to SEG26

O



Output pins from SEG1 to SEG13 are used in 1/2-duty mode. Output

pins from SEG1 to SEG26 are used in static mode.

VDD





Power supply pin for the logic section.

VCC





Power supply pin for the driver section.

VSS





Ground pin.

DISP_SEL

I



Pin for selecting the 12-hour or 24-hour system.

“H” level: 24-hour system, “L” level: 12-hour system with AM/PM display.

SW_EN_SEL

I



Adjustment enable pin.

“L” level: The H, M, and SET pins are disabled.

“H” level: The H, M, and SET pins are enabled.

DU_SEL

I



Duty select pin.

"H" level: 1/2-duty dynamic mode, "L" level: Static mode.

BIAS





Supply voltage pin for the middle level voltage of the common outputs.

In the static display mode, this pin should be open.

NC





No connection.

TEST

I

Pull-up

IC testing pin. This pin is placed normally at a "H" level with an internal

pull-up resistor. Leave this pin open or fix it to a “H” level.