43.20 UART AC Electrical Specifications

Table 43-28. UART AC Electrical Specifications
AC CharacteristicsStandard Operating Conditions: VDD = 1.9V to 3.6V (unless otherwise stated) Operating Temperature: -40°C ≤ TA ≤ +85°C for Industrial Temp -40°C ≤ TA ≤ +125°C for Extended Temp
Param. No.SymbolCharacteristicsMin.TypicalMax.UnitsConditions
UT_1FBRATEBaud rateAsynchronous SAMPR = 16x mode3.9953.9994.005MbpsCLOAD = 30 pF(MAX)
UT_3Asynchronous SAMPR = 8x mode7.9817.9937.981MbpsCLOAD = 30 pF(MAX)
UT_5Asynchronous SAMPR = 3x mode21.22621.33821.602MbpsCLOAD = 30 pF(MAX)
UT_6TLWBaud clock period low time (Synchronous mode)5ns
UT_7THWBaud clock period high time (Synchronous mode)5ns
UT_8TSSetup time before sampling edge5ns
THHold time after sampling edge5ns
UT_26FICKInternal baud clock (Synchronous mode)32MHzMaximum driven XCK of 32 MHz (DIV by 2 of internal clock (fixed pin)
32MHzMaximum driven XCK of 32 MHz (DIV by 2 of internal clock (PPS)
UT_26FXCKExternal baud clock (Synchronous mode)32MHzMaximum external XCK (fixed pin)
32MHzMaximum external XCK (PPS pin)
UT_22FUSARTUSART max GCLK_SERCOM (Synchronous mode)32MHzMaximum driven XCK of 32 MHz (DIV by 2 of internal clock)
UT_24FXCK

USART external clock input (Synchronous mode)

32MHzMaximum external XCK
Note: These parameters are characterized but not tested in manufacturing.