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ATtiny48 Datasheet(PDF) 171 Page - ATMEL Corporation

Part # ATtiny48
Description  8-bit Microcontroller with 4/8K Bytes In-System Programmable Flash
PDF  266 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATtiny48 Datasheet(HTML) 171 Page - ATMEL Corporation

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171
8008C–AVR–03/09
ATtiny48/88
•
Bit 5 – ADLAR: ADC Left Adjust Result
The ADLAR bit affects the presentation of the ADC conversion result in the ADC Data Register.
Write one to ADLAR to left adjust the result. Otherwise, the result is right adjusted. Changing the
ADLAR bit will affect the ADC Data Register immediately, regardless of any ongoing conver-
sions. For a complete description of this bit, see “ADCL and ADCH – The ADC Data Register” on
page 173.
• Bits 3:0 – MUX3:0: Analog Channel Selection Bits
The value of these bits selects which analog inputs are connected to the ADC. Selecting the sin-
gle-ended channel ADC8 enables the temperature measurement. See Table 17-4 for details. 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).
Note:
1. “Temperature Measurement” on page 169
17.13.2
ADCSRA – ADC Control and Status Register A
• Bit 7 – ADEN: ADC Enable
Writing this bit to one enables the ADC. By writing it to zero, the ADC is turned off. Turning the
ADC off while a conversion is in progress, will terminate this conversion.
Table 17-4.
Input Channel Selections
MUX3..0
Single Ended Input
0000
ADC0
0001
ADC1
0010
ADC2
0011
ADC3
0100
ADC4
0101
ADC5
0110
ADC6
0111
ADC7
1000
ADC8(1)
1001
(reserved)
1010
(reserved)
1011
(reserved)
1100
(reserved)
1101
(reserved)
1110
1.1V (VBG)
1111
0V (GND)
Bit
765
43
210
ADEN
ADSC
ADATE
ADIF
ADIE
ADPS2
ADPS1
ADPS0
ADCSRA
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0



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