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8
S1C63358
q Oscillation Characteristics
The oscillation characteristics change depending on the conditions (components used, board pattern, etc.). Use the follow-
ing characteristics as reference values.
OSC1 Crystal Oscillation Circuit
Characteristic
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
CD
f/V
f/IC
f/CG
Vhho
Rleak
Unit
V
pF
ppm
V
M
Max.
10
5
10
Typ.
14
30
Min.
1.1
0.9
-10
25
3.6
200
Condition
tsta
≤3sec (VDD)
tstp
≤10sec
Normal mode
(VDD)
Booster mode
Including the parasitic capacitance inside the IC (in chip)
VDD=0.9 to 3.6V
with VDC switching
without VDC switching
CG=5 to 25pF
CG=5pF (VDD)
Between OSC1 and VDD, VSS
(Unless otherwise specified:VDD=3.0V, VSS=0V, fOSC1=32.768kHz, CG=25pF, CD=built-in, Ta=25
°C)
OSC1 CR Oscillation Circuit
Characteristic
Oscillation frequency dispersion
Oscillation start voltage
Oscillation start time
Oscillation stop voltage
Symbol
fOSC1
Vsta
tsta
Vstp
Unit
%
V
mS
V
Max.
30
3
Typ.
60kHz
Min.
-30
2.3
Condition
Normal mode (VDD)
VDD=2.3 to 3.6V
Normal mode (VDD)
(Unless otherwise specified: VDD=3.0V, VSS=0V, RCR1=600k
, Ta=25°C)
OSC3 Ceramic Oscillation Circuit
Characteristic
Oscillation start voltage
Oscillation start time
Oscillation stop voltage
Symbol
Vsta
tsta
Vstp
Unit
V
mS
V
Max.
5
Typ.
Min.
2.3
Condition
Normal mode (VDD)
VDD=2.3 to 3.6V
Normal mode (VDD)
(Unless otherwise specified: VDD=3.0V, VSS=0V, Ceramic oscillator: 4MHz, CGC=CDC=100pF, Ta=25
°C)
OSC3 CR Oscillation Circuit
Characteristic
Oscillation frequency dispersion
Oscillation start voltage
Oscillation start time
Oscillation stop voltage
Symbol
fOSC3
Vsta
tsta
Vstp
Unit
%
V
mS
V
Max.
30
3
Typ.
1.8MHz
Min.
-30
2.3
Condition
Normal mode (VDD)
VDD=2.3 to 3.6V
Normal mode (VDD)
(Unless otherwise specified: VDD=3.0V, VSS=0V, RCR2=47k
, Ta=25°C)
OSC1 CR oscillation frequency-resistance
characteristic
Resistor value for CR oscillation RCR1 [
]
CR
oscillation
frequency
f
OSC1
[Hz]
VDD = 2.3 to 3.6 V
VSS = 0 V
Ta = 25
°C
Typ. value
20k
30k
40k
50k
60k
70k
80k
90k
100k
110k
120k
300k
400k
500k
600k
700k
800k
900k
1M
OSC3 CR oscillation frequency-resistance
characteristic
Resistor value for CR oscillation RCR2 [
]
CR
oscillation
frequency
f
OSC3
[Hz]
30k
40k
50k
60k
70k
80k
90k
100k
110k
120k
1.1M
1.2M
1.3M
1.4M
1.5M
1.6M
1.7M
1.8M
1.9M
2.0M
2.1M
2.2M
VDD = 2.3 to 3.6 V
VSS = 0 V
Ta = 25
°C
Typ. value