LC75700T Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Fabricante

LC75700T

Key Scan IC

SANYO -> Panasonic 

Serial Data Output

1. When CL is stopped at the low level

LC75700T

CE

CL

DI

11000110

B0 B1 B2 B3 A0 A1 A2 A3

CCB address

DO

X KD1 KD2 KD3

KD26 KD27 KD28 KD29 KD30 X

Output data

X : don’t care

2. When CL is stopped at the high level

CE

CL

DI

1100011 0

B0 B1 B2 B3 A0 A1 A2 A3

CCB address

DO

X KD1 KD2 KD3 KD4

• CCB address: 63H

• KD1 to KD30: Key data

KD26 KD27 KD28 KD29 KD30 X X

Output data

X : don’t care

Note: If a key data read operation is executed when DO is high, the read key data (KD1 to KD30) will be invalid.

Output Data

1.KD1 to KD30: Key data

When a key matrix of up to 30 keys is formed from the KS1 to KS6 key scan output pins and the KI1 to KI5 key scan

input pins and one of those key is pressed, the key output data corresponding to that key will be set to 1. The table

shows the relationship between those pins and the key data bits.

KI1

KI2

KI3

KI4

KI5

KS1

KD1

KD2

KD3

KD4

KD5

KS2

KD6

KD7

KD8

KD9

KD10

KS3

KD11 KD12 KD13 KD14 KD15

KS4

KD16 KD17 KD18 KD19 KD20

KS5

KD21 KD22 KD23 KD24 KD25

KS6

KD26 KD27 KD28 KD29 KD30

When the KS4/P4 to KS6/P2 output pins are set to function as the general-purpose output ports with the control data

“KP1 and KP2”, and a key matrix of up to 15 keys is formed from the KS1 to KS3 output pins and the KI1 to KI5 input

pins, the KD16 to KD30 key data bits will be set to 0.

No. 7632-9/16

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