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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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R8C Datenblatt(PDF) 32 Page - Renesas Technology Corp |
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R8C Datenblatt(HTML) 32 Page - Renesas Technology Corp |
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32 / 199 page  R8C/10 Group Rev.1.20 Jan 27, 2006 page 22 of 180 REJ09B0019-0120 6.2 On-Chip Oscillator Clock This clock, approximately 125 kHz, is supplied by the on-chip oscillator. This clock is used as the clock source for the CPU clock, peripheral function clock, fRING, and fRING128. After reset, the on-chip oscillator clock divided by 8 is selected for the CPU clock. To use the main clock for the CPU clock, set the OCD2 in the OCD register to “0” (selecting main clock) after the main clock becomes oscillating stably. If the main clock stops oscillating when the OCD1 to OCD0 bits in the OCD register is “112” (oscillation stop detection function enabled), the on-chip oscillator automatically starts operating, supplying the necessary clock for the microcomputer. The frequency of the on-chip oscillator varies depending on the supply voltage and the operation ambient temperature. The application products must be designed with sufficient margin for the frequency change. 6.2 On-chip Oscillator Clock |
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