ATTINY24-20SSU Atmel, ATTINY24-20SSU Datasheet - Page 143
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ATTINY24-20SSU
Manufacturer Part Number
ATTINY24-20SSU
Description
IC MCU AVR 2K FLASH 20MHZ 14SOIC
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY24-20SSU
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
USI
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
12
Program Memory Size
2KB (1K x 16)
Program Memory Type
FLASH
Eeprom Size
128 x 8
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Processor Series
ATTINY2x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
128 B
Interface Type
SPI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
12
Number Of Timers
2
Operating Supply Voltage
2.7 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
For Use With
ATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPIATAVRISP2 - PROGRAMMER AVR IN SYSTEMATSTK505 - ADAPTER KIT FOR 14PIN AVR MCU
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATTINY24-20SSU
Manufacturer:
ATMEL
Quantity:
5 000
Part Number:
ATTINY24-20SSU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
ATTINY24-20SSUR
Manufacturer:
ATMEL
Quantity:
6 000
16.11 ADC Conversion Result
16.11.1
16.11.2
16.11.3
8006K–AVR–10/10
Single Ended Conversion
Unipolar Differential Conversion
Bipolar Differential Conversion
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
conversio as there are three types of conversions: single ended conversion, unipolar differential
conversion and bipolar differential conversion.
For single ended conversion, the result is
where V
Table 16-3 on page 145
0x3FF represents the selected reference voltage 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
than the voltage of the negative pin or otherwise the voltage difference is saturated to zero. The
result is presented in one-sided form, from 0x000 (0d) through 0x3FF (+1023d). The GAIN is
either 1x or 20x.
If differential channels and a bipolar input mode are used, the result is
where V
and V
0x200 (-512d) through 0x1FF (+511d). The GAIN is either 1x or 20x. Note that if the user wants
• Quantization Error: Due to the quantization of the input voltage into a finite number of codes,
• Absolute Accuracy: The maximum deviation of an actual (unadjusted) transition compared to
a 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
REF
IN
POS
POS
the selected voltage reference. The result is presented in two’s complement form, from
the selected voltage reference. The voltage of the positive pin must always be larger
is the voltage on the selected input pin and V
is the voltage on the positive input pin, V
is the voltage on the positive input pin, V
and
ADC
ADC
Table 16-4 on page
=
=
(
------------------------------------------------------- - GAIN
(
---------------------------------------------------- - GAIN
ADC
V
V
POS
POS
–
=
–
V
V
V
V
V
--------------------------
REF
REF
NEG
NEG
IN
V
⋅
REF
) 1024
1024
146). 0x000 represents analog ground, and
) 512
⋅
⋅
NEG
NEG
REF
the voltage on the negative input pin,
⋅
the voltage on the negative input pin,
⋅
the selected voltage reference (see
ATtiny24/44/84
143