EM62100AGH datasheet(41/60 Pages) EMC

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EM62100

65 COM/132 SEG STN LCD Driver

Product Specification (V1.1) 09.13.2005

•••• 35

(This specification is subject to change without further notice)

7.2.16 Power Control Set

This command sets the function of the power supply circuit. Select one of the eight

power circuit functions using a 3-bit register. An external power supply and part of an

on-chip power circuit can be used simultaneously. For details, refer to the Power

Supply Circuit in the FUNCTION DESCRIPTION section.

RDB

WRB

Hex

28H to 2FH

When VF goes low, the voltage follower turns off. When VF goes high, it turns on.

When VR goes low, the voltage regulator turns off. When VR goes high, it turns on.

When VB goes low, the voltage booster turns off. When VB goes high, it turns on.

7.2.17 V0 Voltage Regulator Internal Resistor Ratio Set

This command sets the V0 voltage regulator internal resistor ratio. For details, see the

explanation under “The Power Supply Circuits”.

RDB

WRB

Hex

Setting

20H

Small

21H

22H

26H

27H

Large

7.2.18 Electronic Volume (Double Byte Command)

This command allows adjustments can be made on the brightness of the liquid crystal

display by controlling the liquid crystal drive voltage V0 through the output from the

voltage regulator circuits of the internal liquid crystal power supply. This command is

used in pair with the electronic volume mode set command and the electronic volume

(1) The Electronic Volume Mode Set

When this command is input, the electronic volume register set command is

enabled. Immediately after the electronic volume mode has been set, no other

command except for the electronic volume register command can be used. Once

the electronic volume register set command has been used to set data into the

RDB WRB

Hex

81H

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