<s>
ATtiny	B-Device
(	O
also	O
known	O
as	O
TinyAVR	B-Device
)	O
is	O
a	O
subfamily	O
of	O
the	O
popular	O
8-bit	O
AVR	B-Architecture
microcontrollers	I-Architecture
,	O
which	O
typically	O
has	O
fewer	O
features	O
,	O
fewer	O
I/O	B-General_Concept
pins	O
,	O
and	O
less	O
memory	O
than	O
other	O
AVR	B-Architecture
series	O
chips	O
.	O
</s>
<s>
ATtiny	B-Device
microcontrollers	I-Device
specifically	O
excludes	O
various	O
common	O
features	O
,	O
such	O
as	O
:	O
USB	B-Protocol
peripheral	O
,	O
DMA	O
controller	O
,	O
crypto	O
engine	O
,	O
or	O
an	O
external	O
memory	O
bus	O
.	O
</s>
<s>
The	O
following	O
table	O
summarizes	O
common	O
features	O
of	O
the	O
ATtiny	B-Device
microcontrollers	I-Device
,	O
for	O
easy	O
comparison	O
.	O
</s>
<s>
Device	O
(	O
family	O
)	O
8-bit	O
AVR	B-Architecture
microcontrollers	I-Architecture
;	O
Microchip.com	O
Maxclock(MHz )	O
Flash(KiB )	O
SRAM(bytes )	O
EEPROM(bytes )	O
UART	O
I²C( )	O
SPI	B-Architecture
Timers	O
8/12/16	O
( bits	O
)	O
timers	O
x	O
waveform	O
generators	O
ADC	O
pins	O
GPIO	B-General_Concept
pins	O
IC	B-Algorithm
Packages	I-Algorithm
GCC	B-Application
arch	O
ID	O
AVR	B-Architecture
compiler	O
options	O
;	O
gcc.gnu.orgMachine-specific	O
compiler	O
options	O
for	O
the	O
AVR	B-Architecture
;	O
nongnu.org	O
PgmDbg	O
Refs	O
ATtiny11	O
,	O
ATtiny11L	O
6	O
,	O
2	O
1	O
1	O
/	O
0	O
/	O
0	O
5	O
avr1	O
HVSP	O
ATtiny12	O
,	O
ATtiny12L	O
,	O
ATtiny12V	O
8	O
,	O
1.2	O
1	O
64	O
1	O
/	O
0	O
/	O
0	O
5	O
avr1	O
ISP	O
,	O
HVSP	O
ATtiny15L	O
1.6	O
1	O
64	O
2	O
/	O
0	O
/	O
0	O
4	O
6	O
avr1	O
ISP	O
,	O
HVSP	O
ATtiny28L	O
,	O
ATtiny28V	O
4	O
,	O
1.2	O
2	O
1	O
/	O
0	O
/	O
0	O
1	O
x	O
1	O
11	O
avr1	O
HVPP	O
ATtiny22	O
,	O
ATtiny22L	O
8	O
,	O
4	O
2	O
128	O
128	O
1	O
/	O
0	O
/	O
0	O
5	O
avr2	O
ISP	O
,	O
HVSP	O
ATtiny26	O
,	O
ATtiny26L	O
16	O
,	O
8	O
2	O
128	O
128	O
*	O
*	O
*	O
2	O
/	O
0	O
/	O
0	O
1	O
x	O
2	O
11	O
16	O
avr2	O
ISP	O
,	O
HVPP	O
ATtiny13	O
,	O
ATtiny13V	O
,	O
ATtiny13A	O
20	O
,	O
10	O
1	O
64	O
64	O
1	O
/	O
0	O
/	O
0	O
1	O
x	O
2	O
4	O
6	O
avr2.5	O
ISP	O
,	O
dW	O
,	O
HVSP	O
ATtiny24	O
,	O
ATtiny24V	O
,	O
ATtiny24A	O
,	O
ATtiny44	O
,	O
ATtiny44V	O
,	O
ATtiny44A	O
,	O
ATtiny84	O
,	O
ATtiny84V	O
,	O
ATtiny84A	O
20	O
,	O
10	O
2	O
,	O
4	O
,	O
8	O
128	O
,	O
256	O
,	O
512	O
128	O
,	O
256	O
,	O
512	O
*	O
*	O
*	O
1	O
/	O
0	O
/	O
1	O
2	O
x	O
2	O
8	O
12	O
avr2.5	O
ISP	O
,	O
dW	O
,	O
HVSP	O
ATtiny25	O
,	O
ATtiny25V	O
,	O
ATtiny45	O
,	O
ATtiny45V	O
,	O
ATtiny85	B-Architecture
,	O
ATtiny85V	O
20	O
,	O
10	O
2	O
,	O
4	O
,	O
8	O
128	O
,	O
256	O
,	O
512	O
128	O
,	O
256	O
,	O
512	O
*	O
*	O
*	O
2timer0	O
can	O
use	O
clocks	O
up	O
to	O
the	O
core	O
clock	O
,	O
timer1	O
can	O
use	O
clocks	O
up	O
to	O
64MHz	O
/	O
0	O
/	O
0	O
2	O
x	O
2	O
4	O
pins	O
are	O
usable	O
,	O
but	O
only	O
3	O
unique	O
generators	O
can	O
be	O
attached	O
.	O
</s>
<s>
DIP	B-Algorithm
packages	O
in	O
this	O
table	O
are	O
row-to-row	O
.	O
</s>
<s>
SOwww	O
means	O
SOIC	B-Algorithm
package	O
with	O
a	O
case	O
width	O
of	O
'	O
www	O
 '	O
in	O
thousandth	O
of	O
an	O
inch	O
.	O
</s>
<s>
UART/I²C/SPI	O
columns	O
-	O
means	O
a	O
dedicated	O
peripheral	O
,	O
*	O
means	O
a	O
multi-feature	O
peripheral	O
that	O
is	O
chosen	O
by	O
setting	O
configuration	O
bits	O
.	O
</s>
<s>
Most	O
USART	O
peripherals	O
support	O
a	O
minimum	O
choice	O
between	O
UART	O
or	O
SPI	B-Architecture
,	O
where	O
as	O
some	O
might	O
support	O
additional	O
choices	O
,	O
such	O
as	O
LIN	O
,	O
IrDA	O
,	O
RS-485	O
.	O
</s>
<s>
Pgm/Dbg	O
column	O
-	O
flash	B-Device
programming	O
and	O
debugging	O
protocols	O
:	O
HVPP	O
means	O
High	O
Voltage	O
Parallel	O
Programming	O
12V	O
protocol	O
,	O
HVSP	O
means	O
High	O
Voltage	O
Serial	O
Programming	O
12V	O
protocol	O
,	O
ISP	O
means	O
In-System	B-Device
Programmable	I-Device
protocol	O
,	O
uses	O
SPI	B-Architecture
to	O
program	O
the	O
internal	O
flash	B-Device
.	O
</s>
<s>
USI	O
:	O
Universal	O
Serial	O
Interface	O
(	O
not	O
to	O
be	O
confused	O
with	O
USB	B-Protocol
)	O
.	O
</s>
<s>
With	O
appropriate	O
software	O
support	O
,	O
it	O
can	O
be	O
used	O
to	O
implement	O
an	O
SPI	B-Architecture
,	O
I²C	O
or	O
UART	O
interface	O
.	O
</s>
<s>
The	O
following	O
table	O
lists	O
each	O
ATtiny	B-Device
microcontroller	I-Device
by	O
the	O
first	O
release	O
date	O
of	O
each	O
datasheet	O
.	O
</s>
<s>
The	O
following	O
are	O
ATtiny	B-Device
development	O
boards	O
sold	O
by	O
Microchip	O
Technology	O
:	O
</s>
