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 REQUEST (KEY REQ)

A key request is output as shown below according to the state.

State

KEY REQNote

In key scan operation

High level is output while any key

data is “1”.Note

In standby mode or when SEGn High level is output in case of key

& COMn are fixed at VLC5

input only.

When key scanning is stopped Fixed at low level

Key Scan Internal Pull-Up Resistor

During key scan : ON

During display : OFF

Always ON

Always OFF

Note KEY REQ does not become low until the key data is all “0”.

(It is not synchronized with the key data reads.)

LED OUTPUT LATCH CONFIGURATION

The low-order 4 bits of the LED output latch are enabled, and the high-order 4 bits disabled, as shown below.

MSB

LSB

× × × × b3 b2 b1 b0

× : Don’t Care

Latch data is as follows:

 1: On

 0: Off

LED1

LED2

LED3

LED4

10

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