51.23 UART Electrical Specifications

Table 51-33. UART AC Electrical Specifications
AC CHARACTERISTICSStandard Operating Conditions: VDDREG=VDDIO=AVDD 1.71V to 3.63V (unless otherwise stated)

Operating temperature:

-40°C ≤ TA ≤ +85°C for Industrial

Param. No.SymbolCharacteristicsMin.Typ.Max.UnitsConditions
UT_1AFBRATEBaud Rate - Normal Speed SERCOMAsynchronous SAMPR = 16x mode——6.25MbpsVDDIO = 3.3V,

CLOAD = 30 pF(MAX)

——6.25MbpsVDDIO = 1.8V,

CLOAD = 30 pF(MAX)

UT_3AAsynchronous SAMPR = 8x mode——12.5MbpsVDDIO = 3.3V,

CLOAD = 30 pF(MAX)

——12.5MbpsVDDIO = 1.8V,

CLOAD = 30 pF(MAX)

UT_5AAsynchronous SAMPR = 3x mode——15MbpsVDDIO = 3.3V,

CLOAD = 30 pF(MAX)

——15MbpsVDDIO = 1.8V,

CLOAD = 30 pF(MAX)

UT_19ASynchronous Mode X2 mode——25MbpsVDDIO = 3.3V,

CLOAD = 30 pF(MAX)

——24MbpsVDDIO = 1.8V,

CLOAD = 30 pF(MAX)

UT_21ASynchronous Mode X1 mode——25MbpsVDDIO = 3.3V,

CLOAD = 30 pF(MAX)

——24MbpsVDDIO = 1.8V,

CLOAD = 30 pF(MAX)

UT_1BFBRATE_HSBaud Rate - High Speed SERCOMAsynchronous SAMPR = 16x mode——10MbpsVDDIO = 3.3V,

CLOAD = 30 pF(MAX)

——10MbpsVDDIO = 1.8V,

CLOAD = 30 pF(MAX)

UT_3BAsynchronous SAMPR = 8x mode——20MbpsVDDIO = 3.3V,

CLOAD = 30 pF(MAX)

——20MbpsVDDIO = 1.8V,

CLOAD = 30 pF(MAX)

UT_5BAsynchronous SAMPR = 3x mode——25MbpsVDDIO = 3.3V,

CLOAD = 30 pF(MAX)

——25MbpsVDDIO = 1.8V,

CLOAD = 30 pF(MAX)

UT_19BSynchronous Mode X2 mode——25MbpsVDDIO = 3.3V,

CLOAD = 30 pF(MAX)

——24MbpsVDDIO = 1.8V,

CLOAD = 30 pF(MAX)

UT_21BSynchronous Mode X1 mode——25MbpsVDDIO = 3.3V,

CLOAD = 30 pF(MAX)

——24MbpsVDDIO = 1.8V,

CLOAD = 30 pF(MAX)

UT_23FUSARTUSART max GCLK_SERCOM——FCLK_23MHz—
UT_25FXCKUSART External Clock Input——25MHz—