aPPenDiX B POWeR SaVinG
S1C17624/604/622/602/621 TeChniCal Manual
Seiko epson Corporation
aP-B-3
lCD voltage regulator
• Setting VCSEL to 0 (V
C1
reference voltage) will increase current consumption.
Set VCSEL to 1 (V
C2
reference voltage) if the power supply voltage V
DD
is higher than 2.5 V.
• Turning on the LCD voltage regulator heavy load protection will increase current consumption.
Turn off heavy load protection for normal operations. Turn on only if the display is unstable.
• If no LCD display is being used, turn off the LCD driver.
Power supply voltage detection (SVD) circuit
• Operating the SVD circuit will increase current consumption.
Turn off power supply voltage detection unless it is required.