LC75854E View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LC75854E

1/4 Duty LCD Display Drivers with Key Input Function

SANYO -> Panasonic 

Serial Data Output

1. When CL is stopped at the low level

LC75854E, 75854W

2. When CL is stopped at the high level

Output data

Output data

• CCB address...............43H

• KD1 to KD30 .............Key data

• SA...............................Sleep acknowledge data

Note: If a key data read operation is executed when DO is high, the read key data (KD1 to KD30) and sleep

acknowledge data (SA) 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 output pins and the KI1 to KI5 input pins and

one of those keys 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.

KS1/S40

KS2/S41

KS3

KS4

KS5

KS6

KI1

KD1

KD6

KD11

KD16

KD21

KD26

KI2

KD2

KD7

KD12

KD17

KD22

KD27

KI3

KD3

KD8

KD13

KD18

KD23

KD28

KI4

KD4

KD9

KD14

KD19

KD24

KD29

KI5

KD5

KD10

KD15

KD20

KD25

KD30

When the KS1/S40 and KS2/S41 output pins are selected to be segment outputs by control data bits K0 and K1 and a

key matrix of up to 20 keys is formed using the KS3 to KS6 output pins and the KI1 to KI5 input pins, the KD1 to

KD10 key data bits will be set to 0.

2. SA: Sleep acknowledge data

This output data bit is set to the state when the key was pressed. Also, while DO will be low in this case, if serial data

is input and the mode is set (to normal or sleep mode) during this period, that mode will be set. SA will be 1 in sleep

mode and 0 in normal mode.

No. 5066-11/25

Share Link: