ATTIny13-12PI ATMEL Corporation, ATTIny13-12PI Datasheet - Page 88

• Manufacturer Part Number: ATTIny13-12PI
• Description: 8-bit AVR Microcontroller with 1K Bytes In-System Programmable Flash
• Manufacturer: ATMEL Corporation

ADC Conversion Result
ADC Multiplexer Selection
Register – ADMUX
88
ATtiny13
Figure 50. 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 89 and Table 38 on page 89). 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
R
3
–
0
R
REF
2
–
0
V
REF
the selected voltage refer-
MUX1
Input Voltage
R/W
1
0
MUX0
R/W
0
0
2535B–AVR–01/04
ADMUX