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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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AT90PWM2 데이터시트(PDF) 246 Page - ATMEL Corporation |
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AT90PWM2 데이터시트(HTML) 246 Page - ATMEL Corporation |
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246 / 365 page  246 4317K–AVR–03/2013 AT90PWM2/3/2B/3B Figure 21-14. Differential Measurement Range Example 1: – ADMUX = 0xED (ADC3 - ADC2, 10x gain, 2.56V reference, left adjusted result) – Voltage on ADC3 is 300 mV, voltage on ADC2 is 500 mV. – ADCR = 512 * 10 * (300 - 500) / 2560 = -400 = 0x270 Table 21-2. Correlation Between Input Voltage and Output Codes VADCn Read code Corresponding decimal value V ADCm + VREF /GAIN 0x1FF 511 VADCm + 0.999 VREF /GAIN 0x1FF 511 VADCm + 0.998 VREF /GAIN 0x1FE 510 ... ... ... VADCm + 0.001 VREF /GAIN 0x001 1 VADCm 0x000 0 V ADCm - 0.001 VREF /GAIN 0x3FF -1 ... ... ... VADCm - 0.999 VREF /GAIN 0x201 -511 V ADCm - VREF /GAIN 0x200 -512 0 Output Code 0x1FF 0x000 V REF Differential Input Voltage (Volts) 0x3FF 0x200 - V REF /Gain /Gain |
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