| TWI Function | X | X | X | X | X | X | X | X | X | X | X | X | X |
| Normal/fast (400 kbit/s) / FM+ (1 Mbit/s) | X | X | X | X | X | X | X | X | X | X | X | X | X |
| Alternate command | X | X | X | X | X | X | X | X | X | X | X | X | X |
| Three-client ADDR | X | X | X | X | X | X | X | X | X | X | X | X | X |
| High speed (3.4 Mbit/s) | X | X | X | X | X | X | X | X | X | X | X | X | X |
| Sniffer | X | X | X | X | X | X | X | X | X | X | X | X | X |
| TWI FIFO size | 16
bytes |
| UART / USART Function | X | X | X | X | X | X | X | X | X | X | X | X | X |
| Two-wire UART | X | X | X | X | X | X | X | X | X | X | X | X | X |
| Five-wire USART | X | X | X | X | X | X | – | – | – | – | – | – | – |
| Hardware handshaking/RS485 | X | X | X | X | X | X | – | – | – | – | – | – | – |
| ISO7816 | X | X | X | X | X | X | – | – | – | – | – | – | – |
| IrDA | X | X | X | X | X | X | – | – | – | – | – | – | – |
| LIN | X | X | X | X | X | X | – | – | – | – | – | – | – |
| LON | X | X | X | X | – | – | – | – | – | – | – | – | – |
| Manchester | X | X | X | X | X | X | – | – | – | – | – | – | – |
| USART FIFO Size | 16
bytes |
| SPI Function | X | X | X | X | X | X | – | – | – | – | – | – | – |
| 1CS | X | X | X | X | X | X | – | – | – | – | – | – | – |
| 4CS | – | – | – | – | X | X | – | – | – | – | – | – | – |
| SPI FIFO size | 16
bytes | – | – | – | – | – | – | – |
