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LCD Driver Output (1/3 Duty, 1/2 Bias, R/C Type)
Option
Condition
Low Bias Current (Typ.)
High Bias Current (Typ.)
(VLCD/4.5)´45mA
(VLCD/3)´45mA
1/3 Bias
1/2 Bias
(VLCD/4.5)´15mA
(VLCD/3)´15mA
²R² Type Bias Current
Note: The 52-pin QFP package does not support the charge pump (C type bias) of the LCD. The LCD bias type must
select the R type by option.
LCD Segments as Logical Output
The SEG0~SEG23 also can be optioned as logical output, once an LCD segment is optioned as a logical output, the
content of bit0 of the related segment address in LCD RAM will appear on the segment.
SEG0~SEG7 is together byte optioned as logical output, SEG8~SEG15 are bit individually optioned as logical outputs.
LCD Type
R Type
1/2 bias 1/3 bias
C Type
1/3 bias
LCD Bias Type
1/2 bias
3
2
If VDD
>
V
LCD, then VMAX connect to VDD
,
If VDD>VLCD, then VMAX connect to VDD,
else VMAX connect to VLCD
VMAX
else VMAX connect to V1
Rev. 1.80
26
February 14, 2006
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
