SED1330F Datasheet, PDF (36/148 Pages) List of Unclassifed Manufacturers – LCD Controller ICs

3.0 Command Description
Display area
C/R
3.2.1.15 – 3.3.1
1. The YDIS signal goes LOW between one
and two frames after the SLEEP IN com-
mand is received. Since YDIS forces all
display driver outputs to go to the dese-
lected output voltage, YDIS can be used as
a power-down signal for the LCD unit. This
can be done by having YDIS turn off the
relatively high-power LCD drive supplies at
the same time as it blanks the display.
Display memory limit
AP
Figure 14. AP and C/R relationship
2. Since all internal clocks in the SED1330F/
1335F/1336F are halted while in the sleep
state, a DC voltage will be applied to the LCD
panel if the LCD drive supplies remain on.
If reliability is a prime consideration, turn off
the LCD drive supplies before issuing the
SLEEP IN command.
3.2.2 SLEEP IN
Places the system in standby mode. This command
has no parameter bytes. At least one blank frame after
receiving this command, the SED1330F/1335F/1336F
halts all internal operations, including the oscillator,
and enters the sleep mode. Blank data is sent to the
X-drivers, and the Y-drivers have their bias supplies
turned off by the YDIS signal. Using the YDIS signal
to disable the Y-drivers guards against any spurious
displays.
The internal registers of the SED1330F/1335/1336F
maintain their values during the sleep mode. The
display memory control pins maintain their logic levels
to ensure that the display memory is not corrupted.
The SED1330F/1335F/1336F can be removed from
the sleep state by sending the SYSTEM SET com-
mand with only the P1 parameter. The DISP ON
command should be sent next to enable the display.
MSB
LSB
C01010011
3. Note that, although the bus lines become
high impedance in the sleep state, pull-up
or pull-down resistors on the bus line will
force these lines to a known state.
3.3 Display Control Commands
3.3.1 DISP ON/OFF
Turns the whole display on or off. The single-byte
parameter enables and disables the cursor and lay-
ered screens, and sets the cursor and screen flash
rates. The cursor can be set to flash over one charac-
ter or over a whole line.
MSB
LSB
C0 10 1 1 0 00
P1 FP5 FP4 FP3 FP2 FP1 FP0 FC1 FC0
Figure 16. DISP ON/OFF parameters
Figure 15. SLEEP IN instruction
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