10
EPSON
S1C63358 TECHNICAL MANUAL
CHAPTER 2: POWER SUPPLY AND INITIAL RESET
Table 2.1.3.1 Correspondence between power supply voltage and operating mode (oscillation system voltage ragulator)
Power supply
circuit
Oscillation system
voltage regulator
Operating
condition
OSC1
OSC3, 4 MHz
Power supply voltage V
DD
(V)
0.9–1.4
1.4–2.3
2.3–3.6
V
C2
mode
Normal mode
∗
Cannot work
Normal mode
∗
See above Note.
Refer to Section 4.2, " Setting of Power Supply and Operating Mode", for setting procedure of the operat-
ing mode.
2.1.4 Voltage source for A/D converter
(1) Booster mode (V
C2
mode)
The A/D converter operates with 0.9–3.6 V supply voltage. However, a minimum 1.6 V supply
voltage is need for the A/D converter maximum error within
±
5 LSB. Therefore, when operating with
a 1.6 V or less of supply voltage (V
DD
), switch the power supply source to drive the A/D converter
circuit with the V
C2
.
(2) Normal mode
In this mode, the A/D converter circuit directly operates by the power supply voltage V
DD
above 1.6
V without changing the power source to V
C2
.
Table 2.1.4.1 Correspondence between power supply voltage and operating mode (A/D converter)
Circuit
A/D converter
Power supply voltage V
DD
(V)
0.9–1.6
1.6–3.6
V
C2
mode
Normal mode
