ATtiny4 Atmel Corporation, ATtiny4 Datasheet - Page 119
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ATtiny4
Manufacturer Part Number
ATtiny4
Description
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
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16.4
16.4.1
Table 16-2.
16.4.2
Table 16-3.
8127E–AVR–11/11
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
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
page
Notes:
Figure 16-2. External Clock Drive Waveform
7.3 – 8.1 MHz
8.0 MHz
143.
1. Accuracy of oscillator frequency at calibration point (fixed temperature and fixed voltage).
V
IL1
V
IH1
Fixed voltage within:
1.8V – 5.5V
V
3V
CC
V
Min.
250
100
100
CC
0
= 1.8 - 5.5V
Max.
2.0
2.0
4
2
Figure 17-39 on page 143
Fixed temp. within:
Temperature
-40°C – 85°C
V
Min.
25°C
125
CC
50
50
0
= 2.7 - 5.5V
Max.
8
1
1
2
ATtiny4/5/9/10
Accuracy at given Voltage
V
Min.
CC
83
33
33
0
& Temperature
and
= 4.5 - 5.5V
Figure 17-40 on
±10%
±1%
Max.
0.6
0.6
12
2
(1)
Units
MHz
ns
ns
ns
μs
μs
%
119