| Characteristic | Sanguino | Arduino | Arduino Mega | Leonardo |
|---|---|---|---|---|
| Processor | atmega644P | atmega328 | atmega1280 | atmega32U4 |
| GPIO Pins | 32 | 20 | 54 | 26 |
| Analog Pins | 8 | 6 | 16 | 12 |
| PWM Pins | 6 | 6 | 14 | 8 |
| Flash Memory | 64K | 32K | 128K | 32K |
| RAM | 4096 bytes | 2048 bytes | 8192 bytes | 3072 bytes |
| EEPROM | 2048 bytes | 1024 bytes | 4096 bytes | 1024 bytes |
| External Interrupts | 3 | 2 | 32 | 13 |
| JTAG | yes | no | yes | yes |
| I2C | yes | yes | yes | yes |
| SPI | yes | yes | yes | 2 |
| USARTs | 2 | 1 | 4 | 1 |
| Onboard USB<->Serial Converter? | no | yes | yes | in-chip |
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