S1D12200 Epson Electronics America, Inc., S1D12200 Datasheet - Page 125

• Manufacturer Part Number: S1D12200
• Description: S1d12000 Series Lcd Driver Ic Technical Manual Technical Manual
• Manufacturer: Epson Electronics America, Inc.

Low Power Consumption Mode
The S1D12300 Series is provided with the standby mode
and sleep mode with the object of low power consump-
tion when the unit is in the standby state.
The standby mode is turned on and off by power save
command.
In the standby mode only, static display is enabled by
CMOS1 and SEGS1.
1. Liquid crystal display output
2. DD RAM, CG RAM and symbol register
3. In the operation mode, the status precedent to execu-
4. Oscillating circuit
After the power circuit and oscillating circuit are turned
off by command and the power save command is ex-
Rev. 1.9
Standby Mode
Sleep Mode
COM1 ~ COM28, COMS2, COMS3 : V
SEG1 ~ SEG60, SEGS2 ~ SEGS6
COMS1, SEGS1
Perform display control using CMOS1 and SEGS1
by static display control command.
Written contents do not change and are stored re-
gardless of whether the standby mode is turned on or
off.
tion of the standby mode is held.
The internal circuit for dynamic display output stops.
For static display, the oscillating circuit must be ON.
When a built-in power supply is not used
External
supply
power
V
CAP1+
CAP1–
CAP2+
CAP2–
V
V
V
V
V
V
V
V
V
SS
OUT
5
R
DD
1
2
3
4
5
S1D123
**
D
****
: V
: Lighting is
enabled by
static drive.
DD
DD
level
level
EPSON
ecuted, the sleep mode is set. This mode permits reduc-
ing current consumption nearly to the static current
value.
1. Liquid crystal display output
2. DD RAM, CG RAM and symbol register
3. In the operation mode, the status precedent to execu-
4. Power circuit and oscillating circuit
Reset Circuit
When the RES input goes active, this LSI enters the
initialization status.
1. Static display control
2. Display ON/OFF control
3. Power save
4. Power control
5. System set
As described in 6.1 MPU Interface, the RES pin is
connected to the MPU reset pin and performs initializa-
tion concurrently with the MPU.
Regarding the reset signal, a pulse of at least 10 s or
more active level must be input as described in 9. DC
Characteristics. Usually, the operation status is started in
1 s from the edge of the RES signal.
In the S1D12300 Series where the built-in liquid crystal
power circuit is not used, the RES input must be active
when the external liquid crystal power supply is turned
on.
After the RES pin goes active, each register is cleared and
set to the above set status.
Unless initialization is performed by the RES pin when
a power supply voltage is applied, the clear disable status
may be provided.
Initialization status
COM1 ~ COM28, COMS2, COMS3 : V
SEG1 ~ SEG60, SEGS2 ~ SEGS6
COMS1 ~ SEGS1
Written contents do not change and are stored re-
gardless of whether the sleep mode is turned on or
off.
tion of the sleep mode is held. All the internal circuits
stops.
Turn off the built-in power supply and oscillating
circuit by power save command and power control
command.
SD0, SD1 = 0 : Display OFF
C
B
DC
D
O
PS
VC
VF
P
CG
= 0
= 0
= 0
= 0
= 0
= 0
= 0
= 0
= 0
= 0
: Cursor OFF
: Blink OFF
: Double cursor OFF
: Display OFF
: Oscillating circuit OFF
: Power save OFF
: Voltage regulating circuit OFF
: Voltage follower OFF
: Boosting circuit OFF
: Not use of CG RAM
S1D12300 Series
: V
: V
DD
DD
DD
level
level
level
4–21