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5
Power Supply
5.1
Operating Voltage
The S1C63003/004/008/016 operating power voltage (V
V normal type or 1.5 V low-voltage type).
3 V normal type:
V
DD
1.5 V low-voltage type: V
DD
Supply a voltage within this range to between V
5.2
internal Power Supply Circuit
The S1C63003/004/008/016 incorporates the power supply circuits shown in Figure 5.2.1 so the voltages to drive the
CPU, internal logic circuits, oscillation circuits and LCD driver can be generated on the chip.
V
External
power
supply
V
V
OSC
V
V
V
V
V
External
power
supply
V
V
OSC
V
V
V
V
S1C63003/004/008/016 TeChniCal Manual
(Rev. 1.1)
= 1.8 to 5.5 V
= 1.1 to 1.7 V
(+) and V
DD
DD
1.5 V low-voltage type
3 V normal type
Internal operating
D1
voltage regulator
OSC1 oscillation
circuit voltage
regulator
C1
C2
LCD system
C3
voltage regulator
CA
CB
SS
(a) S1C63004/008/016
DD
1.5 V low-voltage type
3 V normal type
Internal operating
D1
voltage regulator
OSC1 oscillation
circuit voltage
regulator
C1
C2
LCD system
C3
voltage regulator
CA
CB
SS
(b) S1C63003
Figure 5.
2.1 Internal power supply circuit
Seiko epson Corporation
) is as follows. It depends on the mask option selection (3
DD
(GND).
SS
Mask option
Internal circuits
V
OSC3 oscillation
D1
VDHLMOD
OSC1 oscillation
V
OSC
V
C1
V
C2
V
C3
LPWR
VCHLMOD
VCREF
Mask option
Internal circuits
V
D1
VDHLMOD
V
OSC1 oscillation
OSC
V
C1
V
C2
V
C3
LPWR
Mask option
VCHLMOD
V
C2
V
C1
5 POWeR SuPPlY
I/O
Pxx
interface
CPU,
OSC3
circuit
OSC4
OSC1
circuit
OSC2
COMx
LCD driver
SEGxx
I/O
Pxx
interface
CPU,
OSC1
circuit
OSC2
COMx
LCD driver
SEGxx
reference
reference
5-1
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