UPDI

Figure 1. UPDI Enable Sequence (1)
Table 1. UPDI Timing(1)
Symbol Description Min. Max. Unit
TRES Duration of Handshake/Break on RESET 10 200 µs
TUPDI Duration of UPDI.txd = 0 10 200 µs
TDeb0 Duration of Debugger.txd = 0 0.2 1 µs
TDebZ Duration of Debugger.txd = z 200 14000 µs
Note:
  1. 1.These parameters are for design guidance only and are not production tested.
Table 2. UPDI Max. Bit Rates vs. VDD(1)
Symbol Description Condition Max Unit
fUPDI UPDI baud rate

VDD = [1.8, 5.5]V
TA = [0, 50]°C

225 kbps

VDD = [2.2, 5.5]V
TA = [0, 50]°C

450

VDD = [2.7, 5.5]V
TA = [0, 50]°C

0.9 Mbps

VDD = [4.5, 5.5]V
TA = [0, 50]°C

1.8
Note:
  1. 1.These parameters are for design guidance only and are not production tested.