NJU6538 View Datasheet(PDF) - Japan Radio Corporation
Part Name
Description
Manufacturer
NJU6538 Datasheet PDF : 27 Pages
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NJU6538
FUNCTIONAL DESCRIPTION
(1) Description for each blocks
(1-1) Serial I/F
The serial I/F controls serial data from external data.
(1-2) Instruction data buffer
The instruction data buffer stores instruction code from external.
(1-3) Instruction decoder
The instruction decoder decodes instruction code and controls each blocks.
(1-4) Display data RAM
The Display data RAM stores data for display from MPU.
(1-5) Segment driver
The Segment driver generates driving waveform to segment terminal on display data.
(1-6) General output driver
The General output driver generates output signal level to general output terminal on output data.
(1-7) Common driver
The Common driver generates driving waveform to common terminal.
(1-8) Electrical Variable Resistance (E.V.R.)
The Electrical Variable Resistance adjusts LCD driving voltage from V0 to V2.
(1-9) Key scan controller
The Key scan controller controls to input from external Key data.
(1-10) Key data buffer
The data buffer for key stores Key data until next key data is stored.
(1-11) CR Oscillator
The Oscillator is external connect resistor, which generates the master clock.
(1-12) Reset circuit
The Reset circuit is type of detectable voltage. It resets internal circuit when the power turns on or
drop the voltage.
Fig.1 Display data RAM (DDRAM) Map
Page address
D0=”0”
D0=”1”
Data
D0 J
J
D1 J
J
D2 J J
J
D3 J
J
J
D4 J
JJ
D5 J
J
D6 J
J
D0
D1
D2
Display Pattern
PAGE 0
PAGE 1
Column
Address
D0="0"
ADC
D0="1"
00 01 02 03 04 05 06
40 3F 3E 3D 3C 3B 3A
Segment Drivers 1 2 3 4 5 6 7
----------------
3F 40
01 00
64 65
Common
Drivers
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
COM9
COM10
Ver.2003-05-09
-5-
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