NJU6538 View Datasheet(PDF) - Japan Radio Corporation

Part Name

Description

Manufacturer

NJU6538

1/8, 1/9, 1/10 Duty BITMAP LCD DRIVER with KEY SCAN

Japan Radio Corporation  

NJU6538

(6-3) Reset status using the RESb terminal (default)

1. Serial interface register clear

2. Display off

3. ADC select

: D0=”0” (Normal mode)

4. Normal Display (Non-inverse display)

5. Whole display off : D0=”0” (Normal mode)

6. Power save mode : D1, D0=”0, 0” (Normal mode)

7. Page address

: 0 page

8. Column address

9. EVR register

10. Duty select

: 00H

: D3, D2, D1, D0=”1, 1, 1, 1”

: 1/10 Duty

11. General output port PWM phase and frequency : D1, D0=”0, 0”

12. General output port : PWMEN=0 (“L” output),

PWM value : D6, D5, D4, D3, D2, D1, D0=”0, 0, 0, 0, 0, 0, 0”

13. Po3/S0 terminal : D0=” 0” (Po3)

(6-4) Initialization by Hardware

The NJU6538 incorporates reset terminal to initialize the all system. When the “L” level signal input

over then 10us(min.) to the RESb terminal, reset sequence is executed. In this time, internal busy during

1us after RESb terminal goes to “H”.

Reset circuit

RESb

Hardware Reset

Power on Reset

System Reset

(6-5) Power on reset operation

When the voltage rising time of power source is over than 1mS, the generated signal of VDET

initializes the system of NJU6538 as reset. When the voltage falling time of power source is over than

1ms, the system is also reset.

When these voltage rising or falling time of power source are not over than 1ms, the Initialization

operation as reset does not operate correctly.

VDD>2.7V

VDD

VDET

VDET

tON>1 ms

tOFF>1 ms

Ver.2003-05-09

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