NJU6682 데이터 시트보기 (PDF) - Japan Radio Corporation

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NJU6682

160-common x 132-segment DOT MATRIX LCD DRIVER FOR 4 GRAY SCALE

Japan Radio Corporation  

NJU6682

1-7)Output Assignment Register

This circuit can choose the direction of the scan of the common output.

Table1

Common Output Terminal

PAD No.

50

Terminal

C0

Name

Ver. A COM0

Ver. B COM159

209

C159

COM159

COM0

•Able to be changed with the mask option of it by the choice (version A or B) to the common scan direction.

1-8)Reset Circuit

This reset circuit does following initialization when the RES input becomes “L” level.

•The initialization condition (The default setting)

1.It sets a display method in the 4 Gray Scale Display Mode.

2.Display Off

3.Display Positive

4.ADC select ; Positive

5.Read Modify Write

6.Voltage Booster off, Voltage Regulator off, Voltage follower off

7.Static Drive off

8.Driver output off

9.Clear the register data of serial interface

10.Set the X-address counter to (00)h

11.Set the Y-Address register to (00)h

12.Set the Z-Address at (00)h

13.The continuous RAM address(Variable RAM Mapping Mode)

14.Set the EVR register to (FF)h

15.Set the Duty 1/160 (Whole Display On)

16.Bias select D3,2,1,0="1,0,1,0" (1/14 Bias)

17.Voltage Booster Select D2,1,0,="1,0,1" ((7 times)

18.Set n-line inverting register to (0)h

19.Set to 8 Bit bus interface mode

To be in " the MPU interface ( the reference example ) ", the RES terminal make connect with the reset terminal of

the MPU and does at the same time as a MPU is initialized. The reset signal must put "L" pulse above minimum 10us

to be in the clause of " the DC characteristic ". The RES signal becomes an operation condition generally after 1us

from the rise-up edge.

When not using a built-in LCD power supply circuit in NJU6682, in case of the outside liquid crystal power supply

turning on, it is necessary to be RES="L". It clears each register by RES="L" and it is set in the above initialization

condition but it doesn't have an influence about the oscillation circuit and output terminal (D0-D15).

When initialization by the RES terminal isn't accomplished in power supply impressing, it sometimes enters the

condition about which it is impossible to cancel.

When using a reset instruction, 9 - 19 of the above initialization are executed.

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