ATtiny28L Atmel Corporation, ATtiny28L Datasheet - Page 56

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ATtiny28L

Manufacturer Part Number
ATtiny28L
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATtiny28L

Flash (kbytes)
2 Kbytes
Pin Count
28
Max. Operating Frequency
4 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
11
Ext Interrupts
10
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 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
1
32khz Rtc
No
Calibrated Rc Oscillator
Yes
External Clock Drive Waveforms
Figure 41. External Clock
External Clock Drive
Table 25. External RC Oscillator, Typical Frequencies
56
Symbol
1/t
t
t
t
t
t
CHCX
CLCH
CHCL
CLCL
CLCX
CLCL
ATtiny28L/V
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
R [kΩ]
100.0
VIL1
31.5
6.5
VIH1
:
Note:
V
833.0
333.0
333.0
R should be in the range 3 - 100 kΩ, and C should be at least 20 pF.
Min
CC
0.0
= 1.8V to 2.7V
C [pF]
70.0
20.0
20.0
Max
1.2
1.6
1.6
V
250.0
100.0
100.0
CC
Min
0.0
= 2.7V to 4.0V
Max
4.0
1.6
1.6
V
250.0
100.0
100.0
100.0 kHz
Min
CC
0.0
1.0 MHz
4.0 MHz
= 4.0V to 5.5V
f
Max
4.0
0.5
0.5
1062F–AVR–07/06
Units
MHz
ns
ns
ns
µs
µs

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