49.22 UART AC Electrical Specifications

Table 49-29. UART AC Electrical Specifications
AC CharacteristicsStandard Operating Conditions: VDD33 = VDDIO = AVDD = 1.9–3.6V (Unless Otherwise Stated)

Operating Temperature:

-40°C ≤ TA ≤ +125°C for Extended Temperature

Parameter NumberSymbolCharacteristicsMin.TypicalMax.UnitsConditions
UT_1FBRATEBaud RateAsynchronous SAMPR = 16x mode (Internal)FCLK_71/16MbpsMaximum Baud Rate is limited to 10.67 Mbps
Asynchronous SAMPR = 16x mode (External)FCLK_73/16Mbps
UT_3Asynchronous SAMPR = 8x mode (Internal)FCLK_71/8Mbps
Asynchronous SAMPR = 8x mode (External)FCLK_73/8Mbps
UT_5Asynchronous SAMPR = 3x mode (Internal)FCLK_71/3Mbps
Asynchronous SAMPR = 3x mode (External)FCLK_73/3Mbps
UT_19Synchronous Host Mode (Internal clock)16MbpsDIRECT Pins
10.67MbpsRemappable (PPS) Pins
UT_21Synchronous Client Mode (External clock)16MbpsDIRECT Pins
10.67MbpsRemappable (PPS) Pins
UT_23FUSARTUSART maximum GCLK_SERCOMFCLK_71MHz
UT_25FXCKUSART External Clock InputFCLK_73MHz
Note: These parameters are characterized but not tested in manufacturing.