LC88F40H0PA Datasheet, PDF (30/32 Pages) Sanyo Semicon Device – For Car Audio Systems 16-bit ETR Microcontroller

LC88F40H0PA/H0PAU/F0PA/F0PAU/D0PA/D0PAU
Example of Crystal Oscillator Circuit Characteristics
Given below are the characteristics of a sample crystal oscillator circuit that were measured using a SANYO-designated
oscillation characteristics evaluation board and external components with circuit constant values with which the
oscillator vendor confirmed normal and stable oscillation.
Table 1 Example of Crystal Oscillator Circuit Characteristics with a Crystal Resonator
Nominal
Frequency
Vendor
Name
Oscillator Name
Circuit Constant
C1
C2
Rd
[pF]
[pF]
[Ω]
Operating
Voltage
Range
[V]
Oscillator
Stabilization Time
tms^X'tal(typ)
[s]
Remarks
32.768kHz
RIVER ELETEC
TFX-03
(CL=12.5pF)
15
15
680k
VDDCPU=
3.0 to 3.6
The oscillation stabilization time refers to the time interval that is required for the oscillation to get stabilized after the
instruction for starting the XT oscillator circuit is executed plus the time interval that is required for the oscillation to get
stabilized after the HOLD mode is released (see Figure 11).
Note: The traces to and from the components that are involved in oscillation should be kept as short as possible as the
oscillation characteristics are affected by their trace pattern.
XT1
C1
XT2
Rd
C2
X’tal
Figure 10 XT Oscillator Circuit
No.A1853-30/32