ATTINY44-20PU Atmel, ATTINY44-20PU Datasheet - Page 176

• Manufacturer Part Number: ATTINY44-20PU
• Description: IC MCU AVR 4K FLASH 20MHZ 14-DIP
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY44-20PU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 12
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 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-DIP (0.300", 7.62mm)
• Package: 14PDIP
• Device Core: AVR
• Family Name: ATtiny
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 12
• Interface Type: SPI/USI
• On-chip Adc: 8-chx10-bit
• Number Of Timers: 2
• For Use With: ATAVRISP2 - PROGRAMMER AVR IN SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

20.4
20.4.1
Table 20-2.
176
Calibration
Method
Factory
Calibration
User
Calibration
Clock Characteristics
ATtiny24/44/84
Accuracy of Calibrated Internal RC Oscillator
Calibration Accuracy of Internal RC Oscillator
Fixed frequency within:
Target Frequency
Figure 20-2. Maximum Frequency vs. V
It is possible to manually calibrate the internal oscillator to be more accurate than default factory
calibration. Note that the oscillator frequency depends on temperature and voltage. Voltage and
temperature characteristics can be found in
page
Notes:
7.3 – 8.1 MHz
8.0 MHz
206.
1. Accuracy of oscillator frequency at calibration point (fixed temperature and fixed voltage).
2. Voltage range for ATtiny24V/44V/84V.
3. Voltage range for ATtiny24/44/84.
20 MHz
10 MHz
Fixed voltage within:
1.8 – 5.5V
2.7 – 5.5V
2.7V
V
3V
CC
(2)
(3)
CC
Safe Operating Area
(ATtiny24/44/84)
Figure 21-40 on page 206
Fixed temperature
-40°C to +85°C
Temperature
within:
25°C
4.5V
Accuracy at given voltage
5.5V
and
& temperature
Figure 21-41 on
±10%
±1%
8006K–AVR–10/10
(1)