em65567 ELAN Microelectronics Corp, em65567 Datasheet - Page 40

• Manufacturer Part Number: em65567
• Description: Com/ Color Driver
• Manufacturer: ELAN Microelectronics Corp

7.26 Partial Display Function
The EM65567 has the partial display function, which can display a part of graphic display area. This function is used be set
lower bias ratio, lower boost step, and lower LCD drive voltage. Since setting partial display function, EM65567 provides
low power consumption. Partial display function is the most suitable for clock indication or calendar indication when a
portable equipment stand-by.
Image of partial Display
When using the partial display function, it is necessary to keep following sequence.
Select a display duty ratio for the partial display from 1/10, 1/18, 1/26, 1/34, 1/42, 1/50 and 1/58 using the DS(LCD duty
ratio) register. Set the most suitable values for LCD drive bias ratio, LCD drive voltage, electronic volume, the number of
boosting steps, and others according to the actually used LCD panel and the selected duty ratio.
* This specification is subject to be changed without notice.
ELAN
LCD DRIVER
Low Power and
Low Voltage
Normal Display
Power circuit off (DCON= "0", AM PON= "0")
Power circuit on (DCON= "1", AM PON= "1")
* Boost step set
* Bias Ratio set
* Duty Ratio set
* Display start com m on
Display off (ON/OFF= "0")
Display on (ON/OFF= "1")
W ait for m ore than 200m s
W ait for m ore than 200m s
Setting Power Function
Setting Display Function
Any display condition
Partial Display
* Electronic volum e set
* Display start Address
40
66 COM/ 96 SEG 256 Color STN LCD Driver
LCD DRIVER
Partial Display
2003/1/9 (V0.1)
EM65567