Specifications

6 EPSON S1C6P466 TECHNICAL MANUAL
CHAPTER 2: POWER SUPPLY AND INITIAL RESET
CHAPTER 2POWER SUPPLY AND INITIAL RESET
2.1 Power Supply
The S1C6P466 operating power voltage is as follows:
Table 2.1.1 Operating power voltage
Operating mode
MCU normal operation mode
PROM programming mode
Operating power voltage
2.7 V–5.5 V
5.0 V ±10%
The S1C6P466 operates by applying a single power supply within the above range between VDD/VDDF
and VSS. The S1C6P466 generates the voltage necessary for all the internal circuits by the built-in power
supply circuits shown in Table 2.1.2. Supply the same voltage level as V
DD to the VDDF terminal from
outside the IC.
Table 2.1.2 Power supply circuits
Circuit
Oscillation circuit
LCD driver
Power supply circuit
Oscillation system voltage regulator
LCD system voltage circuit
Output voltage
V
D1
V C1 –V C5
Notes: • Do not drive external loads with the output voltage from the internal power supply circuits.
• The internal LCD system voltage circuit (1/4 bias) is always used in the S1C6P466, connect
between VC3 and VC2 terminals.
• See Chapter 9, "Electrical Characteristics", for voltage values and drive capability.
External
power
supply
Oscillation
circuit
LCD system
voltage circuit
Oscillation system
voltage regulator
V DD
V
V
C5
OSC1–4
COM0–16
SEG0–59
D1
V
V
V
V
V
CA
CB
CC
CD
CE
CF
C1
C2
C3
C4
C5
LCD driver
V SS
+
V –
V
D1
C1
VDDF
Fig. 2.1.1 Configuration of power supply