 |
công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
|
công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
ATmega64A bảng dữ liệu(PDF) 247 Page - ATMEL Corporation |
|
|
|||||||||||||||||||||||||||||
ATmega64A bảng dữ liệu(HTML) 247 Page - ATMEL Corporation |
|
|
247 / 392 page  247 8160C–AVR–07/09 ATmega64A Example: 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 . ADCL will thus read 0x00, and ADCH will read 0x9C. Writing zero to ADLAR right adjusts the result: ADCL = 0x70, ADCH = 0x02. 23.9 Register Description 23.9.1 ADMUX – ADC Multiplexer Selection Register • Bit 7:6 – REFS1:0: Reference Selection Bits These bits select the voltage reference for the ADC, as shown in Table 23-3. If these bits are changed during a conversion, the change will not go in effect until this conversion is complete (ADIF in ADCSRA is set). The internal voltage reference options may not be used if an external reference voltage is being applied to the AREF pin. Table 23-2. Correlation Between Input Voltage and Output Codes V ADCn Read Code Corresponding Decimal Value V ADCm + VREF/GAIN 0x1FF 511 VADCm + 511/512 VREF/GAIN 0x1FF 511 V ADCm + 510/512 VREF/GAIN 0x1FE 510 :. :. :. VADCm + 1/512 VREF/GAIN 0x001 1 V ADCm 0x000 0 VADCm - 1/512 VREF/GAIN 0x3FF -1 :. :. :. V ADCm - 511/512VREF/GAIN 0x201 -511 VADCm - VREF/GAIN 0x200 -512 Bit 7654 3210 0x07 (0x27) REFS1 REFS0 ADLAR MUX4 MUX3 MUX2 MUX1 MUX0 ADMUX Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 0000 0000 Table 23-3. Voltage Reference Selections for ADC REFS1 REFS0 Voltage Reference Selection 0 0 AREF, Internal Vref turned off. 0 1 AVCC with external capacitor at AREF pin. 10 Reserved 1 1 Internal 2.56V Voltage Reference with external capacitor at AREF pin. |
|
Link URL |
| Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không? [ DONATE ] |
Alldatasheet là | Quảng cáo | Liên lạc với chúng tôi | Chính sách bảo mật | Liên kết đến bảng dữ liệu | Trao đổi link | Tìm kiếm theo nhà sản xuất All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Vietnamese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
