8.2.2 System Power-Down

The following figure shows the SAM9X60D1G-I/LZB power-down sequence that starts by asserting the NRST line to 0.

Once NRST is asserted, the supply inputs can be immediately shut down without any specific timing or order. VDDBU may not be shut down if the application uses a backup storage element on this supply input.

Figure 8-3. Recommended Power-Down Sequence

Table 8-3. Power-Down Timing Requirements
Symbol	Parameter	Conditions	Min	Typ	Max	Unit
t₅	NRST delay at power-down	Delay from NRST asserted to first supply turn-off	0	–	10	µs