ATtiny461A Atmel Corporation, ATtiny461A Datasheet - Page 4

• 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

1.3
1.3.1
Table 1-2.
Notes:
1.4
1.4.1
4
Calibration
Method
Factory
Calibration
User
Calibration
Clock Characteristics
1. Accuracy of oscillator frequency at calibration point (fixed temperature and fixed voltage).
System and Reset Characteristics
ATtiny261A
Accuracy of Calibrated Internal Oscillator
Enhanced Power-On Reset
Calibration Accuracy of Internal Oscillator
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
Table 1-3.
Note:
Target Frequency
Symbol
Fixed frequency
SR
7.3 – 8.1 MHz
V
V
POR
POA
8.0 MHz
ON
within:
1. Values are guidelines, only.
2. Threshold where device is released from reset when voltage is rising.
3. The Power-on Reset will not work unless the supply voltage has been below V
Parameter
Release threshold of power-on reset
Activation threshold of power-on reset
Power-On Slope Rate
Characteristics of Enhanced Power-On Reset. T
Fixed voltage within:
1.8V – 5.5V
V
3V
CC
Figure 2-42 on page 28
(2)
Fixed temperature
(3)
-40
Temperature
°
C to +105
within:
25
°
C
°
Min
0.01
C
1.1
0.6
A
(1)
= -40°C to +105°C
and
voltage & temperature
Typ
1.4
1.3
Figure 2-43 on page
Accuracy at given
8197C–Appendix A–AVR–08/11
(1)
±10%
±1%
Max
1.7
1.7
POA
(1)
.
Units
V/ms
V
V
(1)
29.