UPDI Timing

UPDI Enable Sequence with UPDI PAD Enabled by Fuse⁽¹⁾

Table 1. UPDI Timing Characteristics⁽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 covered by production test limits.

Table 2. UPDI Max. Bit Rates vs. VDD⁽¹⁾
Symbol	Description	Condition	Max	Unit
f_UPDI	UPDI baud rate	V_DD = [1.8, 5.5]V T_A = [0, 50]°C	225	kbps
		V_DD = [2.2, 5.5]V T_A = [0, 50]°C	450	kbps
		V_DD = [2.7, 5.5]V T_A = [0, 50]°C	0.9	Mbps

Note:

1.These parameters are for design guidance only and are not covered by production test limits.