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H8/3021 Datasheet(PDF) 528 Page - Renesas Technology Corp

Part # H8/3021
Description  16-Bit Single-Chip Microcomputer
PDF  712 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8/3021 Datasheet(HTML) 528 Page - Renesas Technology Corp

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16. Clock Pulse Generator
Rev.2.00 Mar. 22, 2007 Page 504 of 684
REJ09B0352-0200
Table 16.2
Crystal Resonator Parameters
Frequency (MHz)
2
4
8
10
12
16
18
Rs max (
Ω)
500
120
80
70
60
50
40
Co (pF)
7 pF max
Use a crystal resonator with a frequency equal to the system clock frequency (
φ).
Notes on Board Design: When a crystal resonator is connected, the following points should be
noted:
Other signal lines should be routed away from the oscillator circuit to prevent induction from
interfering with correct oscillation. See figure 16.4.
When the board is designed, the crystal resonator and its load capacitors should be placed as close
as possible to the XTAL and EXTAL pins.
XTAL
EXTAL
CL2
CL1
LSI
Avoid
Signal A Signal B
Figure 16.4 Example of Incorrect Board Design



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