UPDI

Figure 1. UPDI Enable Sequence ⁽¹⁾

Table 1. UPDI Timing⁽¹⁾
Symbol	Description	Min.	Max.	Unit
T_RES	Duration of Handshake/Break on RESET	10	200	µs
T_UPDI	Duration of UPDI.txd = 0	10	200	µs
T_Deb0	Duration of Debugger.txd = 0	0.2	1	µs
T_DebZ	Duration of Debugger.txd = z	200	14000	µs

Note:

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

Table 2. UPDI Max. Bit Rates vs. VDD⁽¹⁾
Condition
V_DD = [1.8, 5.5]V	225 kbps
V_DD = [2.2, 5.5]V	450 kbps
V_DD = [2.2, 5.5]V	0.9 Mbps
V_DD = [4.5, 5.5]V	1.8 Mbps

Note:

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