S1D15E06 Series
(29) Discharge ON/OFF
This command discharges the capacitors connected to the power supply circuit. This command is used when the system
power of this IC (S1D15E06 series) is turned off, and the duty is changed. See the description of (3) Power Supply OFF
and (4) Changing the Duty in the Instruction Setup: Reference.
E
RD
R/W
WR
A0
D7
D6
D5
D4
D3
D2
D1
D0
0
Setting
0
1
0
1
1
1
0
1
0
1
Discharge OFF
Discharge ON
1
* If this command is executed when the external power supply is used, a large current may flow to damage the IC. If
external power supply is used to drive liquid crystal, be sure to turn off the external power supply before executing
this command.
(30) Power Saving
This command establishes the power save mode, thereby ensuring a substantial reduction of current consumption.
E
RD
R/W
WR
A0
D7
D6
D5
D4
D3
D2
D1
D0 Power save mode
0
1
0
1
0
1
0
1
0
0
0
1
OFF
ON
In the power save mode, display data and operation before power saving are maintained. Access to the display data
RAM from the MPU is also possible. The current consumption is reduced to the value close to static current if all
operations of the LCD display system are stopped and there is no access from the MPU.
In the power save mode, the following occurs:
Stop of oscillator circuit
Stop of LCD power supply circuit
Stop of all liquid crystal drive circuit (VSS level output is issued as the segment and common driver output).
The power save OFF command releases the power save mode. The system goes back to the state before the power save
mode.
* When the external power supply is used, it is recommended to stop the external power supply circuit function when
the power save mode is started. For example, when each level of the liquid crystal drive voltage is given from the
external resistive divider circuit, it is recommended to add a circuit to cut off the current flowing to the resistive
divider circuit when power save function is started. The S1D15E06 series has a liquid crystal display blanking
control control pin DOF, and the level goes LOW when power save function is started. You can use the DOF output
to stop the external power supply circuit function.
42
EPSON
Rev. 2.1
EPSON [ EPSON COMPANY ]
