STE2007_06 Datasheet, PDF (50/62 Pages) STMicroelectronics – 96 x 68 Single-chip LCD controller/driver

Commands
STE2007
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
(D/C) D7 D6 D5 D4 D3 D2 D1 D0
0
1
0
0
Electronic Volume Value
Setting
Command Identifier + Data Field
Table 35. EV
(D/C) D7 D6 D5 D4 D3 D2 D1 D0 Hex
EV Value
VLCD voltage
0
1
0
0
0
0
0
0
0 80
0 Step
low
0
0
0
0
0
1 81
1 Step
0
0
0
0
1
0 82
2 Step
:
:
:
:
:
0
1
0
0
0
0 90 16 Step (Default)
:
:
:
:
:
0
1
1
1
1
0 9E
30 Step
0
1
1
1
1
1 9F
31 Step
high
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
Power saver (Display OFF & Display all points ON
Power saver mode
Powersaver OFF (Display all points OFF)
Command
Effect
Power saver mode canceled
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.
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