31.28 SWD 2-Wire Electrical Specifications

Figure 31-14. SWD 2-Wire Read/Write AC Timing Diagrams
Table 31-38. SWD 2-Wire AC Electrical Specifications
AC CHARACTERISTICSStandard Operating Conditions: VDDIO = AVDD = VDD 1.62V to 3.63V (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