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ATmega169P датащи(PDF) 227 Page - ATMEL Corporation

номер детали ATmega169P
подробное описание детали  8-bit Microcontroller with 16K Bytes In-System Programmable Flash
PDF  393 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega169P датащи(HTML) 227 Page - ATMEL Corporation

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8018N–AVR–08/09
ATmega169P
ADMUX = 0xFB (ADC3 - ADC2, 1.1V reference, left adjusted result)
Voltage on ADC3 is 300 mV, voltage on ADC2 is 500 mV.
ADCR = 512 * (300 - 500) / 1100 = -93 = 0x3A3
.
ADCL will thus read 0xC0, and ADCH will read 0xD8. Writing zero to ADLAR right adjusts the
result: ADCL = 0xA3, ADCH = 0x03.
Table 22-2.
Correlation Between Input Voltage and Output Codes
V
ADCn
Read Code
Corresponding Decimal Value
V
ADCm + VREF
0x1FF
511
VADCm +
511/
512 VREF
0x1FF
511
V
ADCm +
510/
512 VREF
0x1FE
510
...
...
...
VADCm +
1/
512 VREF
0x001
1
V
ADCm
0x000
0
VADCm -
1/
512 VREF
0x3FF
-1
...
...
...
V
ADCm -
511/
512 VREF
0x201
-511
VADCm - VREF
0x200
-512



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