39.28 SWD 2-Wire Electrical Specifications

Table 39-37. SWD 2-Wire AC Electrical Specifications (1)
AC CHARACTERISTICSStandard Operating Conditions: VDD and VDDIO 2.7V to 5.5V (unless otherwise stated)

Operating temperature:

-40°C ≤ TA ≤ +85°C for Industrial

Param. No.SymbolCharacteristicsMin.Typ.Max.UnitsConditions
SWD_1fSWDCLKSWDCLK Clock Frequency——20MHzVDDIO(min) - VDDIO(max)
SWD_3tSWDCLKHIGHSWDCLK Clock High Time1 / (2 * fSWDCLK)——ns
SWD_5tSWDCLKLOWSWDCLK Clock Low Time1 / (2 * fSWDCLK)——ns
SWD_7tSWDIOSKEWSWDIO Skew-5—5ns
SWD_9tSWDIOSETUPSWDIO Setup Time4——ns
SWD_11tSWDIOHOLDSWDIO Hold Time1——ns