43.20 UART AC Electrical Specifications
AC Characteristics | Standard 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 | |||||||
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Param. No. | Symbol | Characteristics | Min. | Typical | Max. | Units | Conditions | |
UT_1 | FBRATE | Baud rate | Asynchronous SAMPR = 16x mode | 3.995 | 3.999 | 4.005 | Mbps | CLOAD = 30 pF(MAX) |
UT_3 | Asynchronous SAMPR = 8x mode | 7.981 | 7.993 | 7.981 | Mbps | CLOAD = 30 pF(MAX) | ||
UT_5 | Asynchronous SAMPR = 3x mode | 21.226 | 21.338 | 21.602 | Mbps | CLOAD = 30 pF(MAX) | ||
UT_6 | TLW | Baud clock period low time (Synchronous mode) | 5 | — | — | ns | — | |
UT_7 | THW | Baud clock period high time (Synchronous mode) | 5 | — | — | ns | — | |
UT_8 | TS | Setup time before sampling edge | 5 | — | — | ns | — | |
TH | Hold time after sampling edge | 5 | — | — | ns | — | ||
UT_26 | FICK | Internal baud clock (Synchronous mode) | — | — | 32 | MHz | Maximum driven XCK of 32 MHz (DIV by 2 of internal clock (fixed pin) | |
— | — | 32 | MHz | Maximum driven XCK of 32 MHz (DIV by 2 of internal clock (PPS) | ||||
UT_26 | FXCK | External baud clock (Synchronous mode) | — | — | 32 | MHz | Maximum external XCK (fixed pin) | |
— | — | 32 | MHz | Maximum external XCK (PPS pin) | ||||
UT_22 | FUSART | USART max GCLK_SERCOM (Synchronous mode) | — | — | 32 | MHz | Maximum driven XCK of 32 MHz (DIV by 2 of internal clock) | |
UT_24 | FXCK | USART external clock input (Synchronous mode) | — | — | 32 | MHz | Maximum external XCK | |
Note: These parameters are characterized but not tested in manufacturing. |