ATtiny24A Atmel Corporation, ATtiny24A Datasheet - Page 175

• Manufacturer Part Number: ATtiny24A
• Manufacturer: Atmel Corporation

Specifications of ATtiny24A

• Flash (kbytes): 2 Kbytes
• Pin Count: 14
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 4
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 12
• Ext Interrupts: 12
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.12
• Eeprom (bytes): 128
• 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: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

20.4
20.4.1
Table 20-2.
20.4.2
Figure 20-2.
Table 20-3.
8183D–AVR–04/11
Calibration
Method
Factory
Calibration
User
Calibration
Symbol
1/t
t
t
t
t
t
Δt
CLCL
CHCX
CLCX
CLCH
CHCL
CLCL
CLCL
Clock Characteristics
Accuracy of Calibrated Internal Oscillator
External Clock Drive
Parameter
Clock Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Change in period from one clock cycle to the next
Calibration Accuracy of Internal RC Oscillator
External Clock Drive Characteristics
External Clock Drive Waveform
V
IL1
Fixed frequency within:
Target Frequency
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
IH1
8.0 MHz
238.
1. Accuracy of oscillator frequency at calibration point (fixed temperature and fixed voltage).
Fixed voltage within:
1.8V – 5.5V
V
3V
CC
V
Min.
250
100
100
CC
0
= 1.8 - 5.5V
Max.
Figure 21-109 on page 237
2.0
2.0
4
2
Fixed temperature
-40°C to +85°C
Temperature
V
within:
Min.
25°C
100
CC
40
40
0
= 2.7 - 5.5V
ATtiny24A/44A/84A
Max.
1.6
1.6
10
2
Accuracy at given voltage
V
Min.
CC
50
20
20
0
and
& temperature
= 4.5 - 5.5V
Figure 21-110 on
±10%
±1%
Max.
0.5
0.5
20
2
(1)
Units
MHz
ns
ns
ns
µs
µs
%
175