49.22 UART AC Electrical Specifications
| AC Characteristics | Standard Operating Conditions: VDD33 = VDDIO = AVDD = 1.9–3.6V
(Unless Otherwise Stated) Operating Temperature: -40°C ≤ TA ≤ +125°C for Extended Temperature | |||||||
|---|---|---|---|---|---|---|---|---|
| Parameter Number | Symbol | Characteristics | Min. | Typical | Max. | Units | Conditions | |
| UT_1 | FBRATE | Baud Rate | Asynchronous SAMPR = 16x mode (Internal) | — | — | FCLK_71/16 | Mbps | Maximum Baud Rate is limited to 10.67 Mbps |
| Asynchronous SAMPR = 16x mode (External) | — | — | FCLK_73/16 | Mbps | ||||
| UT_3 | Asynchronous SAMPR = 8x mode (Internal) | — | — | FCLK_71/8 | Mbps | |||
| Asynchronous SAMPR = 8x mode (External) | — | — | FCLK_73/8 | Mbps | ||||
| UT_5 | Asynchronous SAMPR = 3x mode (Internal) | — | — | FCLK_71/3 | Mbps | |||
| Asynchronous SAMPR = 3x mode (External) | — | — | FCLK_73/3 | Mbps | ||||
| UT_19 | Synchronous Host Mode (Internal clock) | — | — | 16 | Mbps | DIRECT Pins | ||
| — | — | 10.67 | Mbps | Remappable (PPS) Pins | ||||
| UT_21 | Synchronous Client Mode (External clock) | — | — | 16 | Mbps | DIRECT Pins | ||
| — | — | 10.67 | Mbps | Remappable (PPS) Pins | ||||
| UT_23 | FUSART | USART maximum GCLK_SERCOM | — | — | FCLK_71 | MHz | — | |
| UT_25 | FXCK | USART External Clock Input | — | — | FCLK_73 | MHz | — | |
Note: These parameters are characterized but not tested in manufacturing. | ||||||||