STE2007 datasheet(49/62 Pages) STMICROELECTRONICS

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STE2007

8 Commands

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8.12.3 Electronic volume

This command sets a value of electronic volume EV for the VLCD voltage regulator, to adjust

the contrast of LCD panel display (End User).

Table 34.

Electronic volume

Table 35.

8.13

Power saver mode

If the display all points ON command is executed when the display is in display OFF mode,

power saver mode is entered. This mode stops every operation of the LCD display system.

Figure 37. Power saver mode

The internal states in power saver mode are as follows:

–

The oscillation circuit is stopped

–

The LCD power supply circuit is stopped

–

The LCD driver circuit is stopped and segment/common driver outputs to the Vss

level

(D/C)

D6D5D4D3

D2D1D0

Setting

Electronic Volume Value

Command Identifier + Data Field

(D/C)

D7D6D5D4D3D2D1D0

Hex

EV Value

VLCD voltage

010000000

0 Step

low

00001

1 Step

00010

2 Step

10000

16 Step (Default)

11110

30 Step

11111

31 Step

high

Power saver (Display OFF & Display all points ON

Power saver mode

Powersaver OFF (Display all points OFF)

Power saver mode canceled

Command

Effect

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