attiny13-20ss ATMEL Corporation, attiny13-20ss Datasheet - Page 91
attiny13-20ss
Manufacturer Part Number
attiny13-20ss
Description
8-bit Microcontroller With 1k Bytes In-system Programmable Flash - Atmel Corporation
Manufacturer
ATMEL Corporation
Datasheet
1.ATTINY13-20SS.pdf
(177 pages)
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ADC Conversion Result
ADC Multiplexer Selection
Register – ADMUX
2535G–AVR–01/07
Figure 51. Differential Non-linearity (DNL)
•
•
After the conversion is complete (ADIF is high), the conversion result can be found in
the ADC Result Registers (ADCL, ADCH).
For single ended conversion, the result is
where V
ence (see Table 37 on page 92 and Table 38 on page 92). 0x000 represents analog
ground, and 0x3FF represents the selected reference voltage minus one LSB.
• Bit 7 – Res: Reserved Bit
This bit is reserved bit in the ATtiny13 and will always read as zero.
• Bit 6 – REFS0: Reference Selection Bit
Bit
Read/Write
Initial Value
Quantization Error: Due to the quantization of the input voltage into a finite number
of codes, a range of input voltages (1 LSB wide) will code to the same value. Always
± 0.5 LSB.
Absolute Accuracy: The maximum deviation of an actual (unadjusted) transition
compared to an ideal transition for any code. This is the compound effect of offset,
gain error, differential error, non-linearity, and quantization error. Ideal value: ± 0.5
LSB.
IN
is the voltage on the selected input pin and V
Output Code
R
7
–
0
0x000
0x3FF
REFS0
R/W
6
0
0
1 LSB
ADLAR
R/W
5
0
ADC
=
R
4
–
0
V
--------------------------
IN
V
&
REF
1024
3
–
R
0
REF
R
2
–
0
V
REF
the selected voltage refer-
MUX1
Input Voltage
R/W
1
0
MUX0
R/W
0
0
ADMUX
91
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