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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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AT90PWM2 Fiches technique(PDF) 207 Page - ATMEL Corporation |
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AT90PWM2 Fiches technique(HTML) 207 Page - ATMEL Corporation |
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207 / 361 page  207 4317J–AVR–08/10 AT90PWM2/3/2B/3B Table 18-9. Examples of UBRR Settings for Commonly Frequencies Baud Rate (bps) fclk io = 1.0000 MHz fclk io = 1.8432 MHz fclk io = 2.0000 MHz U2X = 0 U2X = 1 U2X = 0 U2X = 1 U2X = 0 U2X = 1 UBRR Error UBRR Error UBRR Error UBRR Error UBRR Error UBRR Error 2400 250.2%510.2% 47 0.0% 950.0%510.2% 103 0.2% 4800 120.2%250.2% 23 0.0% 470.0%250.2% 51 0.2% 9600 6 -7.0% 12 0.2% 11 0.0% 23 0.0% 12 0.2% 25 0.2% 14.4k 3 8.5% 8 -3.5% 7 0.0% 15 0.0% 8 -3.5% 16 2.1% 19.2k 2 8.5% 6 -7.0% 5 0.0% 11 0.0% 6 -7.0% 12 0.2% 28.8k 1 8.5% 3 8.5% 3 0.0% 7 0.0% 3 8.5% 8 -3.5% 38.4k 1 -18.6% 2 8.5% 2 0.0% 5 0.0% 2 8.5% 6 -7.0% 57.6k 0 8.5% 1 8.5% 1 0.0% 3 0.0% 1 8.5% 3 8.5% 76.8k – – 1 -18.6% 1 -25.0% 2 0.0% 1 -18.6% 2 8.5% 115.2k – – 0 8.5% 0 0.0% 1 0.0% 0 8.5% 1 8.5% 230.4k ––– ––– 0 0.0% – ––– 250k ––– ––– ––– ––– 500k ––– ––– ––– ––– 1M ––– ––– ––– ––– Max. (1) 62.5 kbps 125 kbps 115.2 kbps 230.4 Kbps 125 kpbs 250 kbps 1. UBRR = 0, Error = 0.0% Table 18-10. Examples of UBRR Settings for Commonly Frequencies (Continued) Baud Rate (bps) fclk io = 3.6864 MHz fclk io = 4.0000 MHz fclk io = 7.3728 MHz U2X = 0U2X = 1U2X = 0 U2X = 1U2X = 0U2X = 1 UBRR Error UBRR Error UBRR Error UBRR Error UBRR Error UBRR Error 2400 95 0.0% 191 0.0% 103 0.2% 207 0.2% 191 0.0% 383 0.0% 4800 47 0.0% 95 0.0% 51 0.2% 103 0.2% 95 0.0% 191 0.0% 9600 230.0%470.0% 25 0.2% 510.2%470.0% 95 0.0% 14.4k 15 0.0% 31 0.0% 16 2.1% 34 -0.8% 31 0.0% 63 0.0% 19.2k 11 0.0% 23 0.0% 12 0.2% 25 0.2% 23 0.0% 47 0.0% 28.8k 7 0.0% 15 0.0% 8 -3.5% 16 2.1% 15 0.0% 31 0.0% 38.4k 5 0.0% 11 0.0% 6 -7.0% 12 0.2% 11 0.0% 23 0.0% 57.6k 3 0.0% 7 0.0% 3 8.5% 8 -3.5% 7 0.0% 15 0.0% 76.8k 2 0.0% 5 0.0% 2 8.5% 6 -7.0% 5 0.0% 11 0.0% 115.2k 1 0.0% 3 0.0% 1 8.5% 3 8.5% 3 0.0% 7 0.0% 230.4k 0 0.0% 1 0.0% 0 8.5% 1 8.5% 1 0.0% 3 0.0% 250k 0 -7.8% 1 -7.8% 0 0.0% 1 0.0% 1 -7.8% 3 -7.8% |
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