i.MXRT 1020 Connect to ROM

[vlad95vlad]

Hello, I tried to connect to i.MXRT 1020 in custom board via LPUART using sdphost and command: sdphost.exe -p COM9 -- error-status. But i got following  error: unknown HAB mode 4036616662.
Status (HAB mode) = 4036616662 (0xf099e1d6) Unknown error code (4036616662). Error code changes every time. Also i used NXP-MCUBootUtility but it has the same problem. Could anybody explain to me the reason?

Regards.

[FelipeGarcia]

Are you booting in Serial Downloader mode? I would make sure the BOOT_MODE pins are appropriately sampled.

Regards,

Felipe

[vlad95vlad]

It's Serial Downloader mode. There is no response for ping command now. I can read eFuses state and burn it. That's all. Also USB driver doesn't provide VID and PID. I had +3,3V on NVCC_PLL(72 pin  LQFP144) on a first powering up. Now the pin has a 0.1uF cap connected to GND. Could this accident have negative consequences for this MCU?   

[FelipeGarcia]

Hi,

NVCC_PLL is the 1.1V output of the same voltage that supplies digital portions of USB PHYs, PLLs, and the internal 24 MHz oscillator. Powering 3.3V through this pin is not acceptable and it could definitely damage your device.

Best regards,

Felipe

[Mikle_B]

Hello, 

I'm also trying to  connect to my i.MXRT1020. This is my first experience with FreeScale-like MCU since I used LPC line before. I can read controller's ID via JTAG. When I'm trying to connect to serial port I have the same problem as Vlad do. USB connection does not works for me as well - Windows see device but can't recognize it, windows device manager shows VID is 0x0000 and PID is 0x0002 that isn't correct values.