HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 833

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

B.
On a design of the oscillator circuit with the external crystal resonator, values of external
component should be chosen from the evaluation results examined with the crystal resonator
manufacturer. The evaluation result examples by Kinseki,Limited are shown below.
B.1
Note:
Usage Notes for Oscillator circuit with External Crystal Resonator
Recommended Oscillator Circuit
The characteristics of the oscillator circuit vary with the external circuit parameters and the PCB layout.
After an evaluation of the matching between the crystal resonator and the oscillator circuit sufficiently,
choose the circuit parameter and PCB layout. The recommended external circuit parameters and
characteristics are only guideline and recommendations. They are not guaranteed on the user
application systems.
For the designing the PCB layout, refer to section B2 Note for PCB design.
Evaluation results:
Crystal resonator part number
Oscillating frequency (
Overtone number
Shunt capacitance (
Recommended
external circuit
parameters
Characteristics
under
recommended
parameters
EXTAL
C1
x-tal
This LSI
Rf
Rx
Frequency deviation ( ×
Negative resistance (Ω
Load capacitance (
Drive level (µ
Rf
Rd
Rx
C1
C2
XTAL
pF)
kHz)
Rd
C2
W)
pF)
)
10 -
6
)
Crystal resonator specifications
Package size
Part number
fundamental
No connect.
oscillation
CX-53G
11289.6
-5442
7.93
+1.1
8.0
0
0
7pF
7pF
83
Ω
Ω
Rev. 1.00, 02/04, page 795 of 804
5.0
fundamental
No connect.
oscillation
CX-53G
-2826
18432
×
7.91
+1.5
0
0
7pF
7pF
125
CX-53G
8.0
3.2
Ω
Ω
×
1.3mm
fundamental
No connect.
oscillation
CX-53G
30000
-943
8.07
8.0
0
0
8pF
8pF
-1.7
65
Ω
Ω