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ATtiny261-ESSZ Scheda tecnica(PDF) 161 Page - ATMEL Corporation

Il numero della parte ATtiny261-ESSZ
Spiegazioni elettronici  8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
PDF  227 Pages
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Produttore elettronici  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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ATtiny261-ESSZ Scheda tecnica(HTML) 161 Page - ATMEL Corporation

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161
7753C–AVR–07/09
ATtiny261/ATtiny461/ATtiny861
19.10.3
ADCL and ADCH – The ADC Data Register
19.10.3.1
ADLAR = 0
19.10.3.2
ADLAR = 1
When an ADC conversion is complete, the result is found in these two registers.
When ADCL is read, the ADC Data Register is not updated until ADCH is read. Consequently, if
the result is left adjusted and no more than 8-bit precision is required, it is sufficient to read
ADCH. Otherwise, ADCL must be read first, then ADCH.
The ADLAR bit in ADMUX, and the MUXn bits in ADMUX affect the way the result is read from
the registers. If ADLAR is set, the result is left adjusted. If ADLAR is cleared (default), the result
is right adjusted.
• ADC9:0: ADC Conversion Result
These bits represent the result from the conversion, as detailed in “ADC Conversion Result” on
page 154.
Table 19-6.
ADC Prescaler Selections
ADPS2
ADPS1
ADPS0
Division Factor
00
0
2
00
1
2
01
0
4
01
1
8
10
0
16
10
1
32
11
0
64
11
1
128
Bit
15
14131211
10
9
8
0x05 (0x25)
––––––
ADC9
ADC8
ADCH
0x04 (0x24)
ADC7
ADC6
ADC5
ADC4
ADC3
ADC2
ADC1
ADC0
ADCL
765432
10
Read/Write
RRRR
RRRR
RRRR
RRRR
Initial Value
000000
00
000000
00
Bit
15
14131211
10
9
8
0x05 (0x25)
ADC9
ADC8
ADC7
ADC6
ADC5
ADC4
ADC3
ADC2
ADCH
0x04 (0x24)
ADC1
ADC0
––––
––
ADCL
765432
10
Read/Write
RRRR
RRRR
RRRR
RRRR
Initial Value
000000
00
000000
00



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