attiny24v ATMEL Corporation, attiny24v Datasheet - Page 147

• Manufacturer Part Number: attiny24v
• Description: 8-bit Avr Microcontroller With 2/4/8k Bytes Insystem Programmable Flash
• Manufacturer: ATMEL Corporation

16.13.2
8006H–AVR–10/09
ADCSRA – ADC Control and Status Register A
Table 16-5.
1.
For offset calibration purpose the offset of the certain differential channels can be measure by
selecting the same input for both negative and positive input. This calibration can be done for
ADC0, ADC3 and ADC7.
level.
• 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.
• Bit 6 – ADSC: ADC Start Conversion
In Single Conversion mode, write this bit to one to start each conversion. In Free Running mode,
write this bit to one to start the first conversion. The first conversion after ADSC has been written
Bit
0x06 (0x26)
Read/Write
Initial Value
Positive Differential Input
ADC3 (PA3)
ADC4 (PA4)
ADC5 (PA5)
ADC6 (PA6)
ADC7 (PA7)
For offset calibration, only. See
Differential Input channel Selections. (Continued)
ADEN
R/W
7
0
ADSC
R/W
“Operation” on page 133
6
0
Negative Differential Input
ADC0 (PA0)
ADC1 (PA1)
ADC2 (PA2)
ADC3 (PA3)
ADC4 (PA4
ADC5 (PA5)
ADC6 (PA6)
ADC7 (PA7)
ADC3 (PA3)
ADC5 (PA5)
ADC3 (PA3)
ADC4 (PA4)
ADC6 (PA6)
ADC3 (PA3)
ADC5 (PA5)
ADC7 (PA7)
ADC3 (PA3)
ADC6 (PA6)
ADC7 (PA7)
ADATE
R/W
5
0
“Operation” on page
(1)
(1)
ADIF
R/W
4
0
describes offset calibration in a more detailed
ADIE
R/W
3
0
133.
ADPS2
R/W
2
0
Gain 1x
101010
101110
110000
100100
010010
010100
010110
011000
110010
011010
110100
111010
011100
110110
111100
011110
111000
111110
100110
ATtiny24/44/84
ADPS1
R/W
1
0
MUX5:0
ADPS0
R/W
0
0
Gain 20x
101011
101111
110001
100101
010011
010101
010111
011001
110011
011011
110101
111011
011101
110111
111101
011111
111001
111111
100111
ADCSRA
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