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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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RA4M2 Arkusz danych(PDF) 34 Page - Renesas Technology Corp |
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RA4M2 Arkusz danych(HTML) 34 Page - Renesas Technology Corp |
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34 / 92 page  Table 2.17 Clock timing except for sub-clock oscillator (2 of 2) Parameter Symbol Min Typ Max Unit Test conditions HOCO clock oscillator oscillation frequency Without FLL fHOCO16 15.78 16 16.22 MHz –20 ≤ Ta ≤ 105°C fHOCO18 17.75 18 18.25 fHOCO20 19.72 20 20.28 fHOCO16 15.71 16 16.29 –40 ≤ Ta ≤ –20°C fHOCO18 17.68 18 18.32 fHOCO20 19.64 20 20.36 With FLL fHOCO16 15.960 16 16.040 –40 ≤ Ta ≤ 105°C Sub-clock frequency accuracy is ±50 ppm. fHOCO18 17.955 18 18.045 fHOCO20 19.950 20 20.050 HOCO clock oscillation stabilization wait time*2 tHOCOWT — — 64.7 µs — HOCO period jitter — — ±85 — ps — FLL stabilization wait time tFLLWT — — 1.8 ms — PLL clock frequency fPLL 100 — 200 MHz — PLL2 clock frequency fPLL2 120 — 240 MHz — PLL/PLL2 clock oscillation stabilization wait time tPLLWT — — 174.9 µs Figure 2.10 PLL/PLL2 period jitter fPLL, fPLL2 ≥ 120MHz — — ±100 — ps — fPLL, fPLL2 < 120MHz — — ±120 — ps — PLL/PLL2 long term jitter — — ±300 — ps Term: 1µs, 10µs Note 1. When setting up the main clock oscillator, ask the oscillator manufacturer for an oscillation evaluation, and use the results as the recommended oscillation stabilization time. Set the MOSCWTCR register to a value equal to or greater than the recommended value. After changing the setting in the MOSCCR.MOSTP bit to start main clock operation, read the OSCSF.MOSCSF flag to confirm that it is 1, and then start using the main clock oscillator. Note 2. This is the time from release from reset state until the HOCO oscillation frequency (fHOCO) reaches the range for guaranteed operation. Table 2.18 Clock timing for the sub-clock oscillator Parameter Symbol Min Typ Max Unit Test conditions Sub-clock frequency fSUB — 32.768 — kHz — Sub-clock oscillation stabilization wait time tSUBOSCWT — — —*1 s Figure 2.11 Note 1. When setting up the sub-clock oscillator, ask the oscillator manufacturer for an oscillation evaluation and use the results as the recommended oscillation stabilization time. After changing the setting in the SOSCCR.SOSTP bit to start sub-clock operation, only start using the sub-clock oscillator after the sub-clock oscillation stabilization time elapses with an adequate margin. A value that is two times the value shown is recommended. RA4M2 Datasheet 2. Electrical Characteristics R01DS0367EJ0110 Rev.1.10 Jan 27, 2021 Page 34 of 92 |
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