NJU6625 New Japan Radio Co.,Ltd, NJU6625 Datasheet - Page 14

• Manufacturer Part Number: NJU6625
• Description: Nju6625 12character 1-line Dot Matrix Lcd Controller Driver With Smooth Scroll Function
• Manufacturer: New Japan Radio Co.,Ltd

NJU6625
(2) Power on Initialization by internal circuits
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(2-1) Initialization By Internal Reset Circuits
(2-2) Initialization By Hardware
Note) If the condition of power supply rise time described in the Electrical Characteristics is not satisfied,
During the Internal power on initialization, the busy flag (BF) is "1" and this status is kept 1.5ms
(fosc=145kHz) after V
1.2ms to the RESETb terminal, reset sequence is executed. In this time, busy signal output during
250us (fosc=145kHz) after RESETb terminal goes to "H". During this 250us period, any other instruction
must not be input to the NJU6625.
The NJU6625 is automatically initialized by internal power on initialization circuits when
the power is turned on. In the internal power on initialization, following instructions are executed.
The NJU6625 incorporates RESETb terminal to initialize the all system. When the "L" level input over
Timing Chart
External
RESETb Signal
the internal Power On Initialization Circuits will not operated and initialization will not performed.
In this case the initialization by MPU software is required.
Display ON/OFF control
Busy
Set Display mode
Entry mode set
Cntrast control
Set static port
Clear Display
End
Prelimina ry
DD
rises to 2.4V. Initialization flow is shown below:
D=0
M=0
B=0
I/D=1
S=0
P3-P0=0000 All static port output signal is “L”
E.V.R Value=0000
K=1
DF=0
AC=00
Over 1.2ms
H
Display OFF
Icon OFF
Cursor Blink OFF
Increment by 1
No Shift
Keyscan ON
Release the power down mode
Initialize the address counter to 00H
20
H
is written on DD RAM
V
LCD
Low
250us
Ver.2008-03-21