Programming Notes - Epson S1C88650 Technical Manual

DBON: 00FF03H•D0
Control the power voltage booster circuit.
When "1" is written: ON
When "0" is written: OFF
Reading:
When "1" is written to DBON, the power voltage
booster activates and almost doubles the V
voltage to generate the V
voltage booster on when driving the LCD system
voltage regulator with V
When "0" is written to DBON, the power voltage
booster goes off. When driving the LCD system
voltage regulator with V
booster off to reduce current consumption.
At initial reset, DBON is set to "0" (OFF).
VDSEL: 00FF03H•D1
Selects the power voltage for the LCD system
voltage regulator.
When "1" is written: V
When "0" is written: V
Reading:
When "1" is written to VDSEL, the LCD system
voltage regulator is driven with V
the power voltage booster. Before this setting is
made, it is necessary to write "1" to DBON to turn
on the power voltage booster. Furthermore, do not
switch the power voltage to V
after the power voltage booster is turned on to
allow V stabilize.
D2
When "0" is written to VDSEL, the LCD system
voltage regulator is driven with V
At initial reset, VDSEL is set to "0" (V
S1C88650 TECHNICAL MANUAL
5 PERIPHERAL CIRCUITS AND THEIR OPERATION (LCD Driver)
Valid
DD
voltage. Turn the power
D2
.
D2
, turn the power voltage
DD
D2
DD
Valid
generated by
D2
for at least 1 msec
D2
.
DD
).
DD

5.11.8 Programming notes

(1) When the SLP instruction is executed, display
control registers LCDC0 and LCDC1 are
automatically reset to "0" by hardware.
(2) When driving the LCD system voltage regulator
with V , wait at least 1 msec for stabilization of
D2
the voltage before switching the power voltage
for the LCD system voltage regulator to V
using VDSEL after the power voltage booster is
turned on.
EPSON
D2
123