EM65571AGH EMC [ELAN Microelectronics Corp], EM65571AGH Datasheet - Page 65

• Manufacturer Part Number: EM65571AGH
• Description: 130COM / 128SEG 65K Color STN LCD Driver
• Manufacturer: EMC [ELAN Microelectronics Corp]

Product Specification (V1.0) 08.04.2005
(This specification is subject to change without further notice)
7.29 Partial Display Function
The EM65571 has a partial display function, which can display a part of the graphic display
area. This function is used to set the lower bias ratio, lower boost step, and lower LCD
drive voltage. In setting the partial display function, the EM65571 provides low power
consumption, hence, it is most suitable for clock indication or calendar indication of portable
devices.
When using the partial display function, it is necessary to keep the following sequence.
Select a display duty ratio for the partial display from 1/10 to 1/128 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 other details according to the actual LCD panel used and
the selected duty ratio.
ELAN
LCD DRIVER
Low Power and
Low Voltage
Normal Display
* Set Boost step
* Set Bias Ratiot
* Set Duty Ratio
* Display start common
Power Circuit On (DCON= "1", AMPON= "1")
Power circuit Off (DCON= "0", AMPON= "0")
Figure 12. Partial Display Image
Set Power Function
Setting Display Function
Display Off (ON/OFF= "0")
Display on (ON/OFF= "1")
Any Display Condition
Partial Display
* Display Start Address
WAIT
* Set Electronic Volume
WAIT
130COM/128SEG 65K Color STN LCD Driver
LCD DRIVER
Partial Display
EM65571
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