STE2007 datasheet(50/62 Pages) STMICROELECTRONICS

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Commands

STE2007

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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 38.

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

–

The display data and operation mode before execution of the Power saver are

held, and the MCU can access to the DDRAM and internal registers.

(D/C)

D7D6D5

D4D3D2

D1D0

Setting

Electronic Volume Value

Command Identifier + Data Field

(D/C)

D7D6

D5D4D3

D2D1D0

Hex

EV Value

VLCD voltage

100

000

0 Step

low

1 Step

2 Step

16 Step (Default)

30 Step

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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