S1C63358 TECHNICAL MANUAL
EPSON
125
CHAPTER 7: ELECTRICAL CHARACTERISTICS
7.5 Oscillation Characteristics
The oscillation characteristics change depending on the conditions (components used, board pattern,
etc.). Use the following characteristics as reference values.
OSC1 crystal oscillation circuit
Item
Oscillation start voltage
Oscillation stop voltage
Built-in capacitance (drain)
Frequency/voltage deviation
Frequency/IC deviation
Frequency adjustment range
Harmonic oscillation start voltage
Permitted leak resistance
Symbol
Vsta
Vstp
C
D
∂
f/
∂
V
∂
f/
∂
IC
∂
f/
∂
C
G
V
hho
R
leak
Unit
V
V
V
pF
ppm
ppm
ppm
ppm
V
M
Ω
Max.
10
5
10
Typ.
14
30
Min.
1.1
1.1
0.9
-10
25
3.6
200
Condition
t
sta
≤
3sec (V
DD
)
t
stp
≤
10sec
Normal mode
(V
DD
)
Booster mode
Including the parasitic capacitance inside the IC (in chip)
V
DD
=0.9 to 3.6V
with VDC switching
without VDC switching
C
G
=5 to 25pF
C
G
=5pF (V
DD
)
Between OSC1 and V
DD
, V
SS
Unless otherwise specified:
V
DD
=3.0V, V
SS
=0V, f
OSC1
=32.768kHz, C
G
=25pF, C
D
=built-in, Ta=25
°
C
OSC1 CR oscillation circuit
Item
Oscillation frequency dispersion
Oscillation start voltage
Oscillation start time
Oscillation stop voltage
Symbol
f
OSC1
Vsta
t
sta
Vstp
Unit
%
V
ms
V
Max.
30
3
Typ.
60kHz
Min.
-30
2.3
2.3
Condition
Normal mode (V
DD
)
V
DD
=2.3 to 3.6V
Normal mode (V
DD
)
Unless otherwise specified:
V
DD
=3.0V, V
SS
=0V, R
CR1
=600k
Ω
, Ta=25
°
C
OSC3 ceramic oscillation circuit
Unless otherwise specified:
V
DD
=3.0V, V
SS
=0V, Ceramic oscillator: 4MHz, C
GC
=C
DC
=100pF, Ta=25
°
C
Item
Oscillation start voltage
Oscillation start time
Oscillation stop voltage
Symbol
Vsta
t
sta
Vstp
Unit
V
ms
V
Max.
5
Typ.
Min.
2.3
2.3
Condition
Normal mode (V
DD
)
V
DD
=2.3 to 3.6V
Normal mode (V
DD
)
OSC3 CR oscillation circuit
Unless otherwise specified:
V
DD
=3.0V, V
SS
=0V, R
CR2
=47k
Ω
, Ta=25
°
C
Item
Oscillation frequency dispersion
Oscillation start voltage
Oscillation start time
Oscillation stop voltage
Symbol
f
OSC3
Vsta
t
sta
Vstp
Unit
%
V
ms
V
Max.
30
3
Typ.
1.8MHz
Min.
-30
2.3
2.3
Condition
Normal mode (V
DD
)
V
DD
=2.3 to 3.6V
Normal mode (V
DD
)