8 ELECTRICAL CHARACTERISTICS
S1C33210 PRODUCT PART EPSON A-85
8.7 Oscillation Characteristics
Oscillation characteristics change depending on conditions (board pattern, components used, etc.). Use the following
characteristics as reference values. In particular, when a ceramic or crystal oscillator is used, use the oscillator
manufacturer recommended values for constants such as capacitance and resistance.
OSC1 crystal oscillation
(Unless otherwise specified: crystal=Q11C02RX
#1
32.768kHz, Rf1=20MΩ, CG1=CD1=15pF
#2
)
Item Symbol Condition Min. Typ. Max. Unit ∗
Operating temperature Ta VDD=2.7V to 3.6V -40 85 °C
#1 Q11C02RX: Crystal resonator made by Seiko Epson
#2 "CG1=CD1=15pF" includes board capacitance.
(Unless otherwise specified: VDD=3.3V, VSS=0V, crystal=Q11C02RX
#1
32.768kHz,
Rf1=20MΩ, CG1=CD1=15pF
#2
, Ta=25°C)
Item Symbol Condition Min. Typ. Max. Unit ∗
Oscillation start time tSTA1 3 sec
External gate/drain capacitance CG1, CD1 CG1=CD1,
including board capacitance
525pF
Frequency/IC deviation ∆f/∆IC -10 10 ppm
Frequency/power voltage deviation ∆f/∆V -10 10 ppm/V
Frequency adjustment range ∆f/∆CG CG=CD1= 5 to 25pF 50 ppm
#1 Q11C02RX: Crystal resonator made by Seiko Epson
#2 "CG1=CD1=15pF" includes board capacitance.
OSC3 crystal oscillation
Note:A "crystal resonator that uses a fundamental" should be used for the OSC3 crystal oscillation circuit.
(Unless otherwise specified: VSS=0V, crystal=Q22MA306
#1
33.8688MHz,
Rf2=1MΩ, CG1=CD1=15pF
#2
, Ta=25°C)
Item Symbol Condition Min. Typ. Max. Unit ∗
Oscillation start time tSTA3 VDD=3.3V 10 ms
#1 Q22MA306: Crystal resonator made by Seiko Epson
#2 "CG1=CD1=15pF" includes board capacitance.
OSC3 ceramic oscillation
(Unless otherwise specified: VSS=0V, Ta=25°C)
Item Symbol Condition Min. Typ. Max. Unit ∗
Oscillation start time tSTA3 10MHz ceramic oscillator 10 ms 1
16MHz ceramic oscillator 10 ms 2
20MHz ceramic oscillator 10 ms 3
25MHz ceramic oscillator 5 ms 4
33MHz ceramic oscillator 5 ms 5
∗ note) No. Ceramic Recommended constants Power voltage Remarks
oscillator CG2 (pF) CD2 (pF) Rf2 (MΩ) range (V) (Manufacturer)
1 CST25.00MXW0H1 5 5 1 2.7 to 3.6 (Murata Mfg. corporation)
2 CST33.00MXZ040 Open Open 1 2.7 to 3.6 (Murata Mfg. corporation)
∗1 This oscillator has a tendency to rise to the frequency of 0.3%.
