38.5.11 UPDI

Figure 38-8. UPDI Enable Sequence with Dedicated UPDI Pin
Table 38-28. UPDI Timing Specifications
SymbolDescriptionMin.Max.Unit
tRES *Duration of Handshake/Break on RESET10200µs
tUPDI *Duration of UPDI.txd = 010200µs
tDeb0 *Duration of Debugger.txd = 00.21µs
tDebZ *Duration of Debugger.txd = z20014000µs
fUPDI *UPDI baud rate1.8Mbps0ºC ≤ TA ≤ +50ºC
0.9Mbps TA < 0ºC or TA > +50ºC

* These parameters are characterized but not tested in production.

Figure 38-9. UPDI Enable Sequence by High-Voltage (HV) Programming
Table 38-29. UPDI HV Pulse Specifications
SymbolDescriptionMin.Typ.Max.UnitConditions
VHV *Debugger RESET HV signal levelVDD+27.58.5VNever exceed the abs. max. ratings of the RESET pin
THV **Debugger RESET HV signal duration10µs
TUPDI_TIMEOUT *Time to receive valid key after HV pulse65ms

* These parameters are characterized but not tested in production.

** These parameters are for design guidance only and are not tested.