HD66724 Datasheet, PDF(40/117 Page) Hitachi Semiconductor – (Graphics LCD Controller/Driver with Key Scan Function)

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HD66724 Datasheet, PDF (40/117 Pages) Hitachi Semiconductor – (Graphics LCD Controller/Driver with Key Scan Function)

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HD66724/HD66725

Table 18 CT Bits and Variable Resistor Value of Contrast Adjuster

CT Set Value

Variable

CT4 CT3 CT2 CT1 CT0 Resistor (VR)

0 0 0 0 0 3.2 x R

0 0 0 0 1 3.1 x R

0 0 0 1 0 3.0 x R

0 0 0 1 1 2.9 x R

0 0 1 0 0 2.8 x R

0 0 1 0 1 2.7 x R

0 0 1 1 0 2.6 x R

0 0 1 1 1 2.5 x R

0 1 0 0 0 2.4 x R

0 1 0 0 1 2.3 x R

0 1 0 1 0 2.2 x R

0 1 0 1 1 2.1 x R

0 1 1 0 0 2.0 x R

0 1 1 0 1 1.9 x R

0 1 1 1 0 1.8 x R

0 1 1 1 1 1.7 x R

CT Set Value

Variable

CT4 CT3 CT2 CT1 CT0 Resistor (VR)

1 0 0 0 0 1.6 x R

1 0 0 0 1 1.5 x R

1 0 0 1 0 1.4 x R

1 0 0 1 1 1.3 x R

1 0 1 0 0 1.2 x R

1 0 1 0 1 1.1 x R

1 0 1 1 0 1.0 x R

1 0 1 1 1 0.9 x R

1 1 0 0 0 0.8 x R

1 1 0 0 1 0.7 x R

1 1 0 1 0 0.6 x R

1 1 0 1 1 0.5 x R

1 1 1 0 0 0.4 x R

1 1 1 0 1 0.3 x R

1 1 1 1 0 0.2 x R

1 1 1 1 1 0.1 x R

BT1-0: When SW = 1, it switches the output of V5OUT between single, double, and triple boost. The

liquid crystal display drive voltage level can be selected according to its drive duty ratio and bias. A lower

amplification of the booster consumes less current.

BS2-0: When SW = 1, it sets the crystal display drive bias value within the range of 1/4 to 1/6.5 bias. The

liquid crystal display drive bias value can be selected according to its drive duty ratio and voltage. For

details, see the Liquid Crystal Display Drive Bias Selector Circuit section.

Table 19 BT Bits and Output Level

BT1

BT0

V5OUT Output Level

Single boost (no boost)

Double boost

Triple boost

Setting inhibited

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