Tool/software:
Hi All,
When the power is turned off, when the main power supply drops below 14V,
I would like to drive the nRST pin low with a reset IC
and set the IO pin to high impedance.
Please confirm the reset behaviour just to be sure.
● If the nRST pin is driven to Low by the reset IC,
will the IO pin become high impedance after 1.5us?
※ULPCLK≥4MHz
*1, *2
● When VDD drops and the BOR reset is triggered,
will the IO pin become high impedance?
*2, *3
<Explanation>
In *2, it is stated that the pins become high impedance after BOOTRST,
but in *3, the IOMUX column is marked with ‘R’ for BOR, so I interpreted that the IOMUX is also reset by BOR and becomes high impedance.
*1 Page 33, Section 7.8 Timing Characteristics
*2 page 1005 ,10.1.1 IO Types and Analog Sharing
*3 Table 2-12. Reset Cause Encoding (continued)
Best Regards,
Ito
