M7E

Operation

■ Operation Timing (Input Signal Timing)

■ Operation Chart

Pulse duration (tw)

1.5 ms min.

Hold time (th)

0.75 ms min.

Setup time (ts)

2.25 ms min.

ts

tw

th

Data latch

Data input

signals A to D

Latching

input LE

t w: Pulse duration

t h: Hold time

t s: Setup time

Data latch

Data read

H

L

ts

tw

th

H

L

Data latch

Data input

signals A to D

Latching

input LE

t w: Pulse duration

t h: Hold time

t s: Setup time

Data latch

Data read

Positive Logic

Negative logic

The "

1" display is turned

OFF by the LE signal.

The "

5" display is turned

OFF by the LE signal.

• The following example shows the relationship between each input terminal signal and the display condition for a Negative-logic Decimal Display

Unit with Blanking.

Data

Terminal

displayed value

0123456789

Description

Input

signals

H

L

Inputs the data signal as

BCD (or binary code).

H

L

H

L

H

L

DP

H

L

Low when the decimal

point lights.

LE

H

L

Low when all the display

turns OFF. (High is

maintained until the signal

goes low.)

Display condition

---

Remarks

---

Data read

Data latch

Data latch

Data latch

Data latch

Data latch

Data latch

Data read

Data read

Data read

• Using the latchinput (LE) terminalfor eachUnit, the data input terminals (A to D) can be usedin common yet still enable display on eachUnit

(example of a 3-digit dynamic-output model with positive logic).

Data input

signals

(A to D)

0 (power: ON)

5

7

6

1

Latch

input

sig-

nals

digit

(LE3)

H

L

digit

(LE2)

H

L

digit

(LE1)

H

L

Display

condition

change

change

change

change

A numeric value is displayed

one digit at a time via data

signals A to D.

Data input

signals

LE3

latch input signal

(third digit)

LE2

latch input signal

(second digit)

LE1

latch input signal

(first digit)

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