SL20T0081 View Datasheet(PDF) - System Logic Semiconductor
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MFG CO.
'SL20T0081' PDF : 56 Pages View PDF
SLS System Logic Semiconductor
SL20T0081
Power Save (Compound Instruction)
If the entire display ON/OFF instruction is issued during the display OFF state, SL20T0081 enters the Power Save
status to reduce the power consumption to the static power consumption value. According to the status of static
indicator mode, power save is entered to one mode of sleep and standby mode. When Static Indicator mode is ON,
standby mode is issued. When OFF, sleep mode is issued. Power save mode is released by the entire display OFF
instruction.
Figure 16. Power Save (Compound Instruction)
Static Indicator OFF
Static Indicator ON
Power Save (compound Indicator)
[Display OFF]
[All segments ON]
Sleep Mode
[Oscillator Circuit: OFF]
[All COM/SEG Outputs: VSS]
[Consumption Current:<2uA]
Standby Mode
[Oscillator Circuit: OFF
[LCD Power Supply Circuit: OFF]
[All COM/SEG Outputs: VSS]
[Consumption Current: <10uA]
Power Save OFF (Compound Instruction)
[All segments OFF]
[Static Indicator ON]
2 Bytes Command
Power Save OFF
[All segments OFF]
Release Sleep Mode
Release Standby Mode
- Sleep Mode
This stops all operations in the LCD display system, and as long as there are no access from the MPU, the
consumption current is reduced to a value near the static current. The internal modes are as follows :
a. The oscillator circuit and LCD power supply circuit are halted.
b. All liquid crystal drive circuit are halted, and the segment in common drive outputs a VSS level.
- Standby Mode
The duty LCD display system operation are halted and only the static drive system for the indicator continues to
operate, providing the minimum required consumption current for the static drive.
a. The LCD power supply circuits are halted. The oscillator circuit continues to operate.
b. The duty drive system liquid crystal drive circuits are halted and the segment and common driver outputs a VSS
level.
The static drive system does not operate. When a reset command is performed while in standby mode, the system
enter sleep mode.
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