Specifications

I-8 EPSON S1C62N82 TECHNICAL HARDWARE
CHAPTER 2: POWER SUPPLY AND INITIAL RESET
CHAPTER 2 POWER SUPPLY AND INITIAL RESET
2.1
Note
Fig. 2.1.1
Configuration of power
supply S1C62N82/62A82
(items enclosed in
parentheses are for
S1C62L82)
External
power
supply
Internal
circuit
LCD driver
circuit
LCD system
voltage
booster/reducer
circuit
LCD system regulated
voltage circuit
Internal system
regulated voltage
circuit
V DD
V
V
L4
V L1
CA
CB
CC
Vss
V
L1
V L3
V
V
L2
COM0–7
SEG0–37
S1
S1
Oscillation
circuit
OSC1, 2
OSC3, 4
V
L4
V L3
CD
(V ) L1
V L2
(V ) L1
(V ) L2
(V ) L2
V L2 (V ) L1
( )
Power Supply
By externally providing a single power supply (*1) between
VDD and VSS, the S1C62N82 Series produces the internally
required voltage through the constant voltage circuit and
voltage booster/reducer circuit.
In S1C62N82/62A82, the constant voltage circuit produces
VS1 voltage for oscillation and internal circuits, and VL2
voltage for LCD driving. The voltage booster/reducer circuit
produces VL1, VL3 and VL4 based on VL2.
In S1C62L82, the constant voltage circuit VS1 voltage for
oscillation and internal circuits, and VL1 voltage for LCD
driving. The voltage booster/reducer circuit produces VL2,
VL3 and VL4 based on VL1.
Figure 2.1.1 shows the power supply configuration.
*1 Supply voltage: S1C62N82/62A82...3.0 V
S1C62L82...1.5 V
- External loads cannot be driven by the output voltage of the
regulated voltage circuit and voltage booster circuit.
- See Chapter 6, "ELECTRICAL CHARACTERISTICS", for
voltage values.