Oki ML63611, User Manual

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ML63611 User’s Manual
Chapter 15 Power Supply Circuit (POWER)
15 – 3
OPTION B (D): 1.5 V (3.0 V), With regulator
circuit for LCD bias
OPTION A (C): 1.5 V (3.0 V), Without regulator
circuit for LCD bias
15.3 Power Supply Circuit Configuration
15.3.1 OPTION A Power Supply Circuit Configuration
The power supply section of the OPTION A consists of the voltage regulator circuit (V/R1) for internal logic
power supply and the voltage regulator circuit (V/R2) for the low-speed clock generator circuit.
The OPTION A does not have the voltage regulator circuit (V/R3) for the LCD bias generation reference voltage.
Since the power supply voltage is used as the LCD bias generation reference voltage, V
DD1
has to be shorted to
V
DD
.
The OPTION A power supply circuit configuration is shown in Figure 15-1.
OSC1
OSC0
Halver circuit
Low-speed clock
generator circuit
1/2V
DD
LCD bias circuit
V/R2
0.7 V
Internal logic circuits (ROM, RAM, CPU, etc.)
V
HF
V
DD
HC2
HC1
XT1
XT0
V
DD3
V
DD2
V
DD1
C1
C2
V
SS
Ceramic resonator
30 pF
C
L0
C
L1
C
XT
5 to 25 pF
C
3
1.3 to 1.7 V
Fixed in the hardware
V
HF
Open
V
XT
C
G
Open
Open
0.1
µ
F
1.5 V
C
V
High-speed clock generator circuit
ENOSC (bit 1 of FCON) = “0”
V/R1
1.15 V
C
2
32.768 kHz
1.0
µ
F
1.0
µ
F
1.0
µ
F
0.1
µ
F
0.1
µ
F
V
XT
ENOSC (bit 1 of FCON) = “1”
C
CH
V
CH
C
12
ML63611
V
CH
Figure 15-1 OPTION A Power Supply Circuit Configuration