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AVR overview.md

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But why?

This document tries to group mostly similar AVR devices in tables. In this document each device table has some vintage AT90S* (DIP) part as the first ancestor and all the serial programmable known pin-compatible more recent parts.

Bold introduces new function, move or name change for a pin.

8-pin

Model Flash RAM EEPROM Fmax Instructions Available since
AT90S2323 2K 128B 128B 10MHz 118 1999
AT90S2343 2K 128B 128B 10MHz 118 1999
ATtiny12 1K - 64B 8MHz 90 1999
ATtiny15L 1K - 64B 1.6MHz 90 2000
ATtiny22L 2K 128B 128B 1MHz 118 2000
ATtiny13 1K 64B 64B 20MHz 120 2004
ATtiny25 2K 128B 128B 20MHz 120 2006
ATtiny45 4K 256B 256B 20MHz 120 2006
ATtiny85 8K 512B 512B 20MHz 120 2006
ATtiny13A 1K 64B 64B 20MHz 120 2008
Pin Common AT90S2323 ATtiny22L AT90S2343 ATtiny12 ATtiny15L ATtiny13
ATtiny13A		 ATtiny25
ATtiny45
ATtiny85
1 RESET PB5 PB5, ADC0 PB5, dW, ADC0, PCINT5 PB5, dW, ADC0, PCINT5
2 - XTAL1 PB3 PB3, CLOCK PB3, XTAL1 PB4, ADC3 PB3, ADC3, CLKI, PCINT3 PB3, ADC3, OC1B, CLKI, XTAL1, PCINT3
3 - XTAL2 PB4 PB4 PB4, XTAL2 PB3, ADC2 PB4, ADC2, PCINT4 PB4, ADC2, OC1B, XTAL2, PCINT4
4 GND
5 PB0, MOSI AIN0 AIN0, AREF AIN0, OC0A, PCINT0 DI, SDA, AIN0, OC0A, AREF, PCINT0
6 PB1, MISO INT0 INT0 INT0 AIN1, INT0 AIN1, OC1A AIN1, OC0B, INT0, PCINT1 DO, AIN1, OC0B, OC1A, PCINT1
7 PB2, SCK, T0 ADC1, INT0 ADC1, PCINT2 USCK, SCL, ADC1, INT0, PCINT2
8 VCC

20-pin

Model Flash RAM EEPROM Fmax Instructions Available since
AT90S1200 1K - 64B 12MHz 89 1997
AT90S1300 1K - 128B 24MHz 83 N/A
AT90S2313 2K 128B 128B 10MHz 118 1998
ATtiny2313 2K 128B 128B 20MHz 120 2003
ATtiny2313A 2K 128B 128B 20MHz 120 2011
ATtiny4313 4K 256B 256B 20MHz 120 2011
Pin Common AT90S1200 AT90S2313 ATtiny2313 ATtiny2313A
ATtiny4313
1 RESET PA2, dW PA2, dW, PCINT10
2 PD0 RXD RXD RXD, PCINT11
3 PD1 TXD TXD TXD, PCINT12
4 XTAL2 PA1, PCINT9
5 XTAL1 PA0, PCINT8
6 PD2, INT0 XCK, CKOUT XCK, CKOUT, PCINT13
7 PD3 INT1 INT1 INT1, PCINT14
8 PD4, T0 PCINT15
9 PD5 T1 T1, OC0B T1, OC0B, PCINT16
10 GND
11 PD6 ICP ICP ICPI, PCINT17
12 PB0, AIN0 PCINT0 PCINT0
13 PB1, AIN1 PCINT1 PCINT1
14 PB2 OC0A, PCINT2 OC0A, PCINT2
15 PB3 OC1 OC1A, PCINT3 OC1A, PCINT3
16 PB4 OC1B, PCINT4 OC1B, PCINT4
17 PB5, MOSI DI, SDA, PCINT5 DI, SDA, PCINT5
18 PB6, MISO DO, PCINT6 DO, PCINT6
19 PB7, SCK USCK, PCINT7 USCK, SCL, PCINT7
20 VCC

28-pin

Model Flash RAM EEPROM Fmax Instructions Available since
AT90S2333 2K 128B 128B 8MHz 118 1999
AT90S4433 4K 128B 256B 8MHz 118 1999
ATmega8 8K 1024B 512B 16MHz 130 2002
ATmega48 4K 512B 256B 20MHz 131 2004
ATmega88 8K 1024B 512B 20MHz 131 2004
ATmega168 16K 1024B 512B 20MHz 131 2004
ATtiny48 4K 256B 64B 12MHz 123 2008
ATtiny88 8K 512B 64B 12MHz 123 2008
ATmega328 32K 2048B 1024B 20MHz 131 2009
Pin Common AT90S2333
AT90S4433		 ATmega8 ATtiny48
ATtiny88		 ATmega48
ATmega88
ATmega168
ATmega328
1 RESET PC6 PC6, PCINT14, dW PC6, PCINT14, dW
2 PD0 RXD RXD PCINT16 RXD, PCINT16
3 PD1 TXD TXD PCINT17 TXD, PCINT17
4 PD2, INT0 PCINT18 PCINT18
5 PD3, INT1 PCINT19 OC2B, PCINT19
6 PD4, T0 XCK PCINT20 XCK, PCINT20
7 VCC
8 GND
9 - XTAL1 TOSC1, XTAL1 PB6, CLKI, PCINT6 TOSC1, XTAL1, PCINT6
10 - XTAL2 TOSC2, XTAL2 PB7, PCINT7 TOSC2, XTAL2, PCINT7
11 PD5, T1 PCINT21 OC0B, PCINT21
12 PD6, AIN0 PCINT22 OC0A, PCINT22
13 PD7, AIN1 PCINT23 PCINT23
14 PB0 ICP ICP1 ICP1, CLKO, PCINT0 ICP1, CLKO, PCINT0
15 PB1 OC1 OC1A OC1A, PCINT1 OC1A, PCINT1
16 PB2, SS OC1B OC1B, PCINT2 OC1B, PCINT2
17 PB3, MOSI OC2 PCINT3 PCINT3
18 PB4, MISO PCINT4 PCINT4
19 PB5, SCK PCINT5 PCINT5
20 AVCC
21 - AREF AREF PC7, PCINT15 AREF
22 - AGND GND GND GND
23 PC0, ADC0 PCINT8 PCINT8
24 PC1, ADC1 PCINT9 PCINT9
25 PC2, ADC2 PCINT10 PCINT10
26 PC3, ADC3 PCINT11 PCINT11
27 PC4, ADC4 SDA SDA, PCINT12 SDA, PCINT12
28 PC5, ADC5 SCL SCL, PCINT13 SCL, PCINT13

40-pin

Model Flash RAM EEPROM Fmax Instructions Available since
AT90S4414 4K 256B 256B 8MHz 118 1999
AT90S8515 8K 512B 512B 8MHz 118 1999
ATmega8515 8K 512B 512B 16MHz 130 2002
ATmega161 16K 1024B 512B 8MHz 130 2002
ATmega162 16K 1024B 512B 16MHz 131 2002
Pin Common AT90S8414
AT90S8515		 ATmega8515 ATmega161 ATmega162
1 PB0, T0 OC0 OC0 OC0
2 PB1, T1 OC2 OC2
3 PB2, AIN0 RXD1 RXD1
4 PB3, AIN1 TXD1 TXD1
5 PB4, SS OC3B
6 PB5, MOSI
7 PB6, MISO
8 PB7, SCK
9 RESET
10 PD0, RXD RXD0 RXD0
11 PD1, TXD TXD0 TXD0
12 PD2, INT0 XCK1
13 PD3, INT1 ICP3
14 PD4 XCK TOSC1 OSC3A, XCK0, TOSC1
15 PD5, OC1A TOSC2 TOSC2
16 PD6, WR
17 PD7, WD
18 XTAL2
19 XTAL1
20 GND
21 PC0, A8 PCINT8
22 PC1, A9 PCINT9
23 PC2, A10 PCINT10
24 PC3, A11 PCINT11
25 PC4, A12 TCK, PCINT12
26 PC5, A13 TMS, PCINT13
27 PC6, A14 TDO, PCINT14
28 PC7, A15 TDI, PCINT15
29 OC1B PE2, OC1B PE2, OC1B PE2, OC1B
30 ALE PE1 PE1 PE1
31 ICP PE0, INT2 PE0, INT2 PE0, ICP1, INT2
32 PA7, AD7 PCINT7
33 PA6, AD6 PCINT6
34 PA5, AD5 PCINT5
35 PA4, AD4 PCINT4
36 PA3, AD3 PCINT3
37 PA2, AD2 PCINT2
38 PA1, AD1 PCINT1
39 PA0, AD0 PCINT0
40 VCC
Model Flash RAM EEPROM Fmax Instructions Available since
AT90S4434 4K 256B 256B 8MHz 118 1999
AT90S8535 8K 512B 512B 8MHz 118 1999
ATmega163 16K 1024B 512B 8MHz 130 2001
ATmega8535 8K 512B 512B 16MHz 130 2001
ATmega323 32K 2048B 1024B 8MHz 130 2001
ATmega16 16K 1024B 512B 16MHz 131 2002
ATmega32 32K 2048B 1024B 16MHz 131 2002
ATmega644 64K 4096B 2048B 20MHz 131 2006
ATmega1284 128K 16384B 4096B 20MHz 131 2008
ATmega164 16K 1024B 512B 20MHz 131 2010
ATmega324 32K 2048B 1024B 20MHz 131 2010
Pin Common AT90S4434
AT90S8535		 ATmega163 ATmega8535 ATmega323
ATmega16
ATmega32		 ATmega644 ATmega164P
ATmega324P
ATmega644P		 ATmega164(P)A
ATmega324(P)A
ATmega644(P)A
ATmega1284(P)
1 PB0, T0 XCK XCK XCK0, PCINT8 XCK0, PCINT8 XCK0, PCINT8
2 PB1, T1 CLKO, PCINT9 CLKO, PCINT9 CLKO, PCINT9
3 PB2, AIN0 INT2 INT2 INT2, PCINT10 INT2, PCINT10 INT2, PCINT10
4 PB3, AIN1 OC0 OC0 OC0A, PCINT11 OC0A, PCINT11 OC0A, PCINT11
5 PB4, SS OC0B, PCINT12 OC0B, PCINT12 OC0B, PCINT12
6 PB5, MOSI PCINT13 PCINT13 ICP3, PCINT13
7 PB6, MISO PCINT14 PCINT14 OC3A, PCINT14
8 PB7, SCK PCINT15 PCINT15 OC3B, PCINT15
9 RESET
10 VCC
11 GND
12 XTAL2
13 XTAL1
14 PD0, RXD RXD0, PCINT24 RXD0, PCINT24 T3, RXD0, PCINT24
15 PD1, TXD TXD0, PCINT25 TXD0, PCINT25 TXD0, PCINT25
16 PD2, INT0 PCINT26 RXD1, PCINT26 RXD1, PCINT26
17 PD3, INT1 PCINT27 TXD1, PCINT27 TXD1, PCINT27
18 PD4, OC1B PCINT28 XCK1, PCINT28 XCK1, PCINT28
19 PD5, OC1A PCINT29 PCINT29 PCINT29
20 PD6, ICP OC2B, PCINT30 OC2B, PCINT30 OC2B, PCINT30
21 PD7, OC2 OC2A, PCINT31 OC2A, PCINT31 OC2A, PCINT31
22 PC0 SCL SCL SCL SCL, PCINT16 SCL, PCINT16 SCL, PCINT16
23 PC1 SDA SDA SDA SDA, PCINT17 SDA, PCINT17 SDA, PCINT17
24 PC2 TCK TCK, PCINT18 TCK, PCINT18 TCK, PCINT18
25 PC3 TMS TMS, PCINT19 TMS, PCINT19 TMS, PCINT19
26 PC4 TDO TDO, PCINT20 TDO, PCINT20 TDO, PCINT20
27 PC5 TDI TDI, PCINT21 TDI, PCINT21 TDI, PCINT21
28 PC6, TOSC1 PCINT22 PCINT22 PCINT22
29 PC7, TOSC2 PCINT23 PCINT23 PCINT23
30 AVCC
31 AGND
32 AREF
33 PA7, ADC7 PCINT7 PCINT7 PCINT7
34 PA6, ADC6 PCINT6 PCINT6 PCINT6
35 PA5, ADC5 PCINT5 PCINT5 PCINT5
36 PA4, ADC4 PCINT4 PCINT4 PCINT4
37 PA3, ADC3 PCINT3 PCINT3 PCINT3
38 PA2, ADC2 PCINT2 PCINT2 PCINT2
39 PA1, ADC1 PCINT1 PCINT1 PCINT1
40 PA0, ADC0 PCINT0 PCINT0 PCINT0

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