ATtiny861 Automotive Atmel Corporation, ATtiny861 Automotive Datasheet - Page 154
ATtiny861 Automotive
Manufacturer Part Number
ATtiny861 Automotive
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT90CAN128_AUTOMOTIVE.pdf
(225 pages)
2.ATTINY261_AUTOMOTIVE.pdf
(11 pages)
3.ATTINY261_AUTOMOTIVE.pdf
(16 pages)
4.ATTINY261_AUTOMOTIVE.pdf
(226 pages)
Specifications of ATtiny861 Automotive
Flash (kbytes)
8 Kbytes
Pin Count
20
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
8
Hardware Qtouch Acquisition
No
Max I/o Pins
16
Ext Interrupts
16
Usb Speed
No
Usb Interface
No
Spi
1
Twi (i2c)
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
0.5
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 150
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
2
Output Compare Channels
6
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
No
Calibrated Rc Oscillator
Yes
- AT90CAN128_AUTOMOTIVE PDF datasheet
- ATTINY261_AUTOMOTIVE PDF datasheet #2
- ATTINY261_AUTOMOTIVE PDF datasheet #3
- ATTINY261_AUTOMOTIVE PDF datasheet #4
- Current page: 154 of 226
- Download datasheet (5Mb)
19.8
19.8.1
19.8.2
154
ADC Conversion Result
ATtiny261/ATtiny461/ATtiny861
Single Ended Conversion
Unipolar Differential Conversion
Figure 19-12. Differential Non-linearity (DNL)
• Quantization Error: Due to the quantization of the input voltage into a finite number of codes, a
• Absolute Accuracy: The maximum deviation of an actual (unadjusted) transition compared to
After the conversion is complete (ADIF is high), the conversion result can be found in the ADC
Result Registers (ADCL, ADCH). The form of the conversion result depends on the type of the
conversion as there are three types of conversions: single ended conversion, unipolar differen-
tial conversion and bipolar differential conversion.
For single ended conversion, the result is
where V
Table 19-4 on page 157
0x3FF represents the selected voltage reference minus one LSB. The result is presented in
one-sided form, from 0x3FF to 0x000.
If differential channels and an unipolar input mode are used, the result is
where V
and V
158). The voltage on the positive pin must always be larger than the voltage on the negative pin
or otherwise the voltage difference is saturated to zero. The result is presented in one-sided
form, from 0x000 (0d) to 0x3FF (+1023d). The GAIN is either 1x, 8x, 20x or 32x.
ADC
ADC
range of input voltages (1 LSB wide) will code to the same value. Always ± 0.5 LSB.
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.
REF
=
=
IN
POS
V
---------------------------- -
---------------------------------------------------------- -
V
the selected voltage reference (see
IN
is the voltage on the selected input pin and V
POS
V
is the voltage on the positive input pin, V
REF
1024
–
V
V
Output Code
NEG
REF
0x000
0x3FF
and
1024
0
Table 19-5 on page
1 LSB
GAIN
Table 19-4 on page 157
158). 0x000 represents analog ground, and
NEG
REF
the voltage on the negative input pin,
the selected voltage reference (see
V
REF
Input Voltage
and
Table 19-5 on page
7753F–AVR–01/11
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