EM65101
128COM/160SEG 16 Gray Scale Level LCD Driver
(3) In cases where the four times boosted voltage is used, place C1 only across
CAP1+ and CAP1-, across CAP2+ and CAP2-, across CAP3+ and CAP3- , across
V2X and VSS; and open CAP4+, CAP2-, CAP5+, and CAP3-
(4) In cases where the voltage that is boosted five times is used, place C1 only across
CAP1+ and CAP1-, across CAP2+ and CAP2-, across CAP3+ and CAP3- across
CAP4+ and CAP2- , across V2X and VSS; and open CAP5+ and CAP3-
(5) In cases where the voltage that is boosted six times is used, place C1 only across
CAP1+ and CAP1-, across CAP2+ and CAP2-, across CAP3+ and CAP3-, across
CAP4+ and CAP2-, across CAP5+ and CAP3-, and across V2X and VSS
When you use the built-in booster circuit, make sure the output voltage (VOUT) is less
than the recommended operating voltage (18.0 Volt). If the output voltage (VOUT) is
more than the recommended operating voltage, correct chip operation can NOT be
guaranteed.
VOUT=18V
VOUT=9V
VEE=3V
VSS=0V
VEE=3V
VSS=0V
Boosted 3 times
Boosted 6 times
Figure 7-11 Correlation Between VEE and VOUT Boost-up Voltages
NOTE
The maximum voltage VOUT of 18V is automatically limited by hardware to avoid
damage to the IC.
7.10 Electronic Volume
The voltage conversion circuit has a built-in electronic volume control, which allows
VBA to be controlled by DV register settings. The DV registers are 7 bits providing 65
voltage values for the VBA. The relationship between VBA and DV is summarized in
the following equation:
VBA= (1+( M + offset) / 381)* VREF
V0 = VBA * N
Where:
M = DV register setting (offsets CV5 ~ CV0 setting on EEPROM)
N = RM register setting
VREF = Internal temperature compensation output voltage
24 •
Product Specification (V0.4) 08.15.2005
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
