Force an hard reset to RT1051

[mastupristi]

In the Ref Man I read that there are two types of reset: POR and cold.

The difference seems to be related to some peripherals that are not reset, in the case of cold reset, especially IOMUX.

If, while the micro is running, the POR_B pin is driven low, what kind of reset is it?

During the time that POR_B is kept low, are the micro pins kept low impedance on high?
I would like to find a way to force an "hard" reset, where all the peripheral are reset, and that makes sure to put all pins in high impedance (e.g. GPIO input without pull up/down) in particular during POR_B kept low.

best regards

Max

[victorjimenez]

Hello Max,

As my co-worker Kerry mentioned on the following thread POR_B can be considered as a POR reset. I made the same test that you suggest in the other post:

I encourage you to try using the signal from the J25 connector (obviously closing the J26 jumper). Does the JTAG disconnect in this case or not?

I got the same results as Kerry, JTAG disconnects once you connect J25-3 to GND. I understand that the information from the reference manual might be confusing, I'm already reviewing this with the documentation team.

Although this is a POR reset, unfortunately, is not possible to put all pins in high impedance. Please check the following community post. 

Have a great day,
TIC

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[jh1]

Hi,

so the POR_B pin causes a POR reset.
How would you trigger a COLD reset?

Thx,

Johann