49.33 SWD Two-Wire AC Electrical Specifications

Table 49-42. SWD Two-Wire AC Electrical Specifications
AC Characteristics			Standard Operating Conditions: VDD33 = VDDIO = AVDD = 1.9–3.6V (Unless Otherwise Stated) Operating Temperature: -40°C ≤ TA ≤ +125°C for Extended Temperature
Parameter Number	Symbol	Characteristics	Min.	Typ	Max.	Units	Conditions
SWD_1	fSWDCLK	SWDCLK Clock Frequency	—	—	25	MHz	VDDIO(minimum) - VDDIO(maximum)
SWD_3	tSWDCLK_HIGH	SWDCLK Clock High Time	—	1/(2 × fSWDCLK)	—	ns
SWD_5	tSWDCLK_LOW	SWDCLK Clock Low Time	—	1/(2 × fSWDCLK)	—	ns
SWD_7	tSWDIO_SKEW	SWDIO Output Skew	-5	—	5	ns
SWD_9	tSWDIO_SETUP	SWDIO Setup Time (Target Output)	4	—	—	ns
SWD_11	tSWDIO_HOLD	SWDIO Hold Time (Target Output)	1	—	—	ns

Figure 49-34. SWD Two-Wire Read/Write AC Timing Diagram