ATtiny461A Atmel Corporation, ATtiny461A Datasheet - Page 187

• Manufacturer Part Number: ATtiny461A
• Manufacturer: Atmel Corporation

Specifications of ATtiny461A

• Flash (kbytes): 4 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 20 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): 0.25
• Eeprom (bytes): 256
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 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

19.3
19.4
19.4.1
Table 19-2.
Notes:
8197C–AVR–05/11
Calibration
Method
Factory
Calibration
User
Calibration
Speed
Clock Characteristics
1. Accuracy of oscillator frequency at calibration point (fixed temperature and fixed voltage).
Accuracy of Calibrated Internal Oscillator
Calibration Accuracy of Internal Oscillator
The maximum operating frequency of the device is dependent on supply voltage, V
tionship between supply voltage and maximum operating frequency is piecewise linear, as
shown in
Figure 19-1.
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
Target Frequency
Fixed frequency
7.3 - 8.1 MHz
223.
8.0 MHz
within:
20 MHz
10 MHz
4 MHz
Figure
Maximum Operating Frequency vs. Supply Voltage
19-1.
1.8V
Fixed voltage within:
1.8V - 5.5V
V
3V
CC
2.7V
Figure 20-49 on page 223
Fixed temperature
-40°C to +85°C
Temperature
ATtiny261A/461A/861A
within:
25°C
4.5V
voltage & temperature
Accuracy at given
and
5.5V
±10%
Figure 20-50 on
±1%
CC
. The rela-
(1)
187