ATtiny4 Atmel Corporation, ATtiny4 Datasheet - Page 4

• Manufacturer Part Number: ATtiny4
• Manufacturer: Atmel Corporation

Specifications of ATtiny4

• Flash (kbytes): 0.5 Kbytes
• Pin Count: 6
• Max. Operating Frequency: 12 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 1
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 4
• Ext Interrupts: 4
• Usb Speed: No
• Usb Interface: No
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.03
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 1
• Output Compare Channels: 2
• Input Capture Channels: 1
• Pwm Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

1.4
1.4.1
Table 1-2.
1.4.2
Table 1-3.
4
Calibration
Method
Factory
Calibration
User
Calibration
Symbol
1/t
t
t
t
t
t
Δ
CLCL
CHCX
CLCX
CLCH
CHCL
t
CLCL
CLCL
Clock Characteristics
ATtiny4/5/9/10
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
Fixed frequency within:
Target Frequency
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
Note:
Figure 1-2.
7.3 – 8.1 MHz
8.0 MHz
1. Accuracy of oscillator frequency at calibration point (fixed temperature and fixed voltage).
V
IL1
External Clock Drive Waveform
V
IH1
Fixed voltage within:
1.8V – 5.5V
V
3V
CC
V
Min.
250
100
100
CC
0
= 1.8 - 5.5V
Figure 2-32 on page 24
Max.
2.0
2.0
4
2
Fixed temp. within:
-40°C – 125°C
Temperature
V
Min.
25°C
125
CC
50
50
0
= 2.7 - 5.5V
Max.
8
1
1
2
and
Accuracy at given Voltage
V
Min.
Figure 2-33 on page
100
CC
33
33
8127D–Appendix A–AVR–08/11
0
& Temperature
= 4.5 - 5.5V
±10%
±1%
Max.
0.6
0.6
10
2
(1)
Units
MHz
ns
ns
ns
μs
μs
%
24.