UPD16432BGC-001-9EU Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPD16432BGC-001-9EU

1/8, 1/15 DUTY LCD CONTROLLER/DRIVER

NEC => Renesas Technology 

µPD16432B

KEY MATRIX AND KEY DATA RAM CONFIGURATION

The key matrix has an 8 × 4 configuration, as shown below.

KEY1

KEY2

=

KEY3

KEY4

KS1 KS2 KS3 KS4 KS5 KS6 KS7 KS8

Key data is stored as shown below, and is read in MSB-first order by a read command.

b7

b4 b3

b0

KS8

KS7

KS6

KS5

KS4

KS3

KS2

KS1

Read Order

Key data is as follows:

 1: On

 0: Off

KEY4 KEY3 KEY2 KEY1

Key Input Equivalent Circuit

VDD

Pull-Up

Control Signal

R

To Key

Data RAM

In the event of key source output, the pull-up control signal

becomes “H”, and the pull-up transistor is turned on.

KEYn

9

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