Specifications

I-6 EPSON S1C6S2N7 TECHNICAL HARDWARE
CHAPTER 2: POWER SUPPLY AND INITIAL RESET
POWER SUPPLY AND INITIAL RESETCHAPTER 2
2.1
Power Supply
With a single external power supply (*1) supplied to VDD
through VSS, the S1C6S2N7 Series generates the necessary
internal voltages with the regulated voltage circuit (<VS1> for
oscillators and internal circuit, <VL1 or VL2> for LCDs) and
the voltage booster (<VL2 or VL1, VL3> for LCDs).
Figure 2.1.1 shows the power supply configuration of the
S1C6S2N7.
*1 Supply voltage: S1C6S2N7.... 3 V
S1C6S2A7 .... 3 V
S1C6S2B7.... 3 V or 1.5 V
S1C6S2L7 .... 1.5 V
- External loads cannot be driven by the output voltage of the
regulated voltage circuit and the voltage booster.
- See Chapter 6, "ELECTRICAL CHARACTERISTICS", for
voltage values.
Note
External
power
supply
Internal
circuit
Oscillation
circuit
LCD driver
circuit
Internal system
regulated voltage
circuit
VDD
VS1
VL1
∗
VL2
∗
VL3
CA
CB
C5
C2
C3
C4
C1
VSS
VL1
∗
VL2
∗
VL3
VS1
VL1
∗
OSC1, 2
COM0–3
SEG0–25
LCD system
regulated voltage
circuit
LCD system
voltage booster
Fig. 2.1.1
Configuration of power
supply system
* In the S1C6S2N7 and S1C6S2A7, VL1 and VL2 are
interchanged. (The LCD system voltage regulator generates
VL2, and the LCD system voltage booster generates VL1.)