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SH7041A Fiches technique(PDF) 120 Page - Renesas Technology Corp

No de pièce SH7041A
Description  Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2)
PDF  923 Pages
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Fabricant  RENESAS [Renesas Technology Corp]
Site Internet  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7041A Fiches technique(HTML) 120 Page - Renesas Technology Corp

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82
XTAL
EXTAL
C
L1
C
L2
Rd
4–10 MHz
C
L1 = CL2 = 18–22 pF (Recommended value)
Figure 4.2 Connection of the Crystal Oscillator (Example)
Table 4.1
Damping Resistance Values (Recommended Values)
Frequency (MHz)
Parameter
4
8
10
Rd (
Ω)
500
200
0
Crystal Oscillator: Figure 4.3 shows an equivalent circuit of the crystal oscillator. Use a crystal
oscillator with the characteristics listed in table 4.2.
Co
EXTAL
C
L
LRs
XTAL
Figure 4.3 Crystal Oscillator Equivalent Circuit
Table 4.2
Crystal Oscillator Parameters
Frequency (MHz)
Parameter
4
8
10
Rs max (
Ω)
120
80
60
Co max (pF)
7
7
7
4.2.2
External Clock Input Method
Figure 4.4 shows an example of an external clock input connection. In this case, make the external
clock high level to stop it when in standby mode. During operation, make the external input clock
frequency 4–10 MHz.



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