EM65570
68COM/ 98SEG 65K Color STN LCD Driver
Select a display duty ratio for the partial display from 1/10 to 1/68 using the DS (LCD
duty ratio) register. Set the most suitable values for the LCD drive bias ratio, LCD drive
voltage, electronic volume, the number of boosting steps, and others according to the
actual LCD panel and the selected duty ratio in use.
7.22 Discharge Circuit
The EM65570 has a built-in the discharge circuit, which discharges electricity from
capacitors to obtain stable power sources (V0~V4). The discharge circuit is valid when
the DIS register is set to “1.” When the built-in power supply is used, be sure to set
DIS=”1” after the power source is turned off (DCON, AMPON)=(0, 0).
CAUTION!!!
Do NOT turn on both the built-in power source and the external power source (V0~V4,
VOUT) while DIS =”1.”
7.23 Scroll Function
This function specifies the section of screen for scrolling. It sets the scroll top address,
scroll bottom address, scroll specified address, scroll mode of the area scrolling, and
scroll start address. Note that the scroll top address should be smaller than the scroll
bottom address, i.e.;
0 <= scroll top address, scroll bottom address, scroll specified address <= 67;
scroll top address <= scroll start address <= scroll bottom address.
Product Specification (V1.0) 09.05.2005
(This specification is subject to change without further notice)
• 47
ELAN [ ELAN MICROELECTRONICS CORP ]
