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UPD16662 Datasheet(PDF) 5 Page - NEC

Part No. UPD16662
Description  240 OUTPUT LCD COLUMN SEGMENT DRIVER WITH BUILT-IN RAM
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Maker  NEC [NEC]
Homepage  http://www.nec.com/
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UPD16662 Datasheet(HTML) 5 Page - NEC

 
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5
µµµµPD16662
(12) Level shifter
The level shifter converts from the operating voltage (3.3 V) of the internal circuit to the liquid-crystal drive circuit
and low driver interface voltage (5 V).
(13) DEC
Decodes the gray scale display data to make it compatible with the liquid-crystal drive voltages V0, V1 and V2 .
(14) Liquid crystal drive circuit
This circuit selects one of the liquid-crystal drive powers V0, V1, and V2, which are compatible with the gray scale
display data and the display OFF signal (/DOFF), to generate the liquid crystal applied voltage.
(15) Self diagnostic circuit
If the operation timing of the master chip and slave chip has deviated due to external noise, this circuit will detect
the problem and generate a total column/driver refresh signal.
Address map image diagram (Example of VGA-half size configuration)
No.0
No.2
No.1
No.3
Y240
Y240
Y1
L1
L160
L1
L160
Y1
Y240
Y240
Y1
Y1
Address progress direction
Column direction specified with A7 to A0
Row direction
specified with
A16 to A8
Address progress direction


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