NJU6624C New Japan Radio, NJU6624C Datasheet - Page 11

• Manufacturer Part Number: NJU6624C
• Description: 14-CHARACTER 1-LINE DOT MATRIX LCD CONTROLLER DRIVER with SMOOTH SCROLL FUNCTION
• Manufacturer: New Japan Radio

(2)Power on Initialization by internal circuits
(2)Power on Initialization by internal circuits
(2-1)Initialization By Internal Reset Circuits
(2-1)Initialization By Internal Reset Circuits
(2-2)Initialization By Hardware
(2-2)Initialization By Hardware
The NJU6624C is automatically initialized by internal power on initialization circuits when
The NJU6624C 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. During the
the power is turned on. In the internal power on initialization, following instructions are executed. During the
Internal power on initialization, the busy flag (BF) is "1" and this status is kept 1.5ms (fosc=145kHz) after V
Internal power on initialization, the busy flag (BF) is "1" and this status is kept 1.5ms (fosc=145kHz) after V
rises to 2.4V.
rises to 2.4V. Initialization flow is shown below:
Note : If the condition of power supply rise time described in the Electrical Characteristics is not satisfied, the
Note : If the condition of power supply rise time described in the Electrical Characteristics is not satisfied, the
The NJU6624C incorporates RESET terminal to initialize the all system. When the "L" level input over 1.2ms to
The NJU6624C incorporates RESET terminal to initialize the all system. When the "L" level input over 1.2ms to
the RESET terminal, reset sequence is executed. In this time, busy signal output during 250us (fosc=145kHz)
the RESET terminal, reset sequence is executed. In this time, busy signal output during 250us (fosc=145kHz)
after RESET terminal goes to "H". During this 250us period, any other instruction must not be input to the
after RESET terminal goes to "H". During this 250us period, any other instruction must not be input to the
NJU6624C.
NJU6624C.
-Timing Chart
-Timing Chart
RESET Signal
internal Power On Initialization Circuits will not operated and initialization will not performed.
internal Power On Initialization Circuits will not operated and initialization will not performed.
In this case the initialization by MPU software is required.
In this case the initialization by MPU software is required.
External
Busy
Initialization flow is shown below:
Display ON/OFF control
Set Display mode
Contrast control
Entry mode set
Set static port
Clear Display
End
D=0
D=0 :Display Off
M=0
M=0 :Icon Off
B=0
B=0 :Cursor Blink Off
I/D=1
I/D=1
S=0
S=0
P3-P0=0000
P3-P0=0000 :All static port output signal is ”L”.
E.V.R. Value=0000
E.V.R. Value=0000 : VLCD Low
K=1
K=1
DF=0
DF=0
AC=00H
AC=00H
:Display Off
:Icon Off
:Cursor Blink Off
Over 1.2ms
:Increment by 1
:Increment by 1
:No Shift
:No Shift
:All static port output signal is ”L”.
Keyscan ON
Keyscan ON
Release the power down mode
Release the power down mode
: VLCD Low
NJU6624C
NJU6624C
250us
DD
DD