EM62100AGH datasheet(49/60 Pages) EMC

49 / 60 page

EM62100

65 COM/132 SEG STN LCD Driver

Product Specification (V1.1) 09.13.2005

•••• 43

(This specification is subject to change without further notice)

7.3 Chip Initial State and Power ON/OFF Flowchart:

7.3.1 Initialization

Note: For this chip, when power is applied, the LCD driving non-selective potentials V2

and V3 (segment pins) and V1 and V4 (common pins) are output through the LCD

driving output pins SEG. and COM.

When electric charge still remains in the smoothing capacitor connecting between the

LCD driving voltage output pins (V0 - V4) and the VDD pin, the picture on the display

may instantaneously become totally dark when power is turned on. To avoid such

failure, we recommend the following flow sequence upon turning on the power.

7.3.1.1 With instant built-in power supply circuit, after turning on the power

Turn ON the V

DD - VSS power, keeping the RESB pin = "L"

When power is stabilized

Release the reset state (RESB pin = "H")

Initialized state (Default)

Function setup by command input (User setup)

(11) LCD bias setting

( 8) ADC selection

(15) Common output state selection

Function setup by command input (User setup)

(17) Setting the built-in resistance radio

to regulate the V0 voltage

(18) Electronic volume control

Function setup by command input (User setup)

(16) Power control setting

This concludes the initialization

EM62100AGH Datasheet(PDF) 49 Page - ELAN Microelectronics Corp