
S1D15G10D08B000
56
EPSON
Rev. 1.0
12.2.2 Command Input Procedure During Power Off
When power-on reset is not used
<< IC status>>
Display off (DISOFF):
display is turned off, and all of the common and segment pins become V
C
potential.
Liquid crystal drive power supply circuit off (PWRCTR):
built-in power supply circuit stops.
Oscillation off (OSCOFF):
built-in oscillation circuit stops and all the circuits inside the IC also stop.
Sleep In (SLPIN)
*2
Stop the power supply (V
DDI
, V
DD
).
*2: In order to discharge the capacitor connected to the liquid crystal drive power supply circuit, execute the Sleep In
command to put the IC in Sleep state prior to stopping the power supply. Stop V
DDI
and V
DD
when the output of
the liquid crystal drive power supply circuit has dropped sufficiently.
When power-on reset is used
Turn on the power-on reset (RES = LOW) *3
Stop the power supply (V
DDI
, V
DD
).
*3: Stop V
DDI
and V
DD
when the output of the liquid crystal drive power supply circuit has dropped sufficiently.
(Note:1)
This IC is the logic circuit of the V
DD
-GND and V
DDI
-GND power supplies, and it controls the liquid crystal output
driver. If the V
DDI
-GND and V
DD
-GND power supplies are stopped with residual voltage in the liquid crystal drive
power supply circuit, the liquid crystal output driver (COM, SEG) may output uncontrolled voltage. Stop V
DDI
and
V
DD
when the output of the liquid crystal drive power supply circuit has dropped sufficiently.
(Note:2)
Avoid writing in the display RAM during sleep-in since it may cause too much current to be generated.
12.2.3 Sleep state
This IC goes into Sleep state when the Sleep In command and several other commands are executed. When in the Sleep
state, IC power consumption will be kept to a minimum. Also, internal status including the display RAM will be
maintained, the Sleep Out and several commands will resume the display state.
Setting the Sleep state
<< IC status>>
1
Display off (DISOFF):
display is turned off, and all the common segment and pins become VC potential.
2
Liquid crystal drive power supply circuit off (PWRCTR):
built-in power supply circuit stops.
3
Oscillation off (OSCOFF):
built-in oscillation circuit stops and all the circuits inside the IC also stop.
Sleep In (SLPIN):
commands other than
1
to
3
and display RAM content are maintained. Commands can be entered.
(Note) Avoid writing in the display RAM during sleep-in since it may cause too much current to be generated.
Releasing the Sleep state
<<IC status>>
Sleep Out (SLPOUT)
Oscillation on (OSCON):
built-in power supply circuit operates and liquid crystal drive potential is supplied.