MassErase S32K118 never stops???

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MassErase S32K118 never stops???

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Contributor II

We have developed own SWD + GPIO bitbang SW to program onboard S32K118 MCU.

After performing SWD connection steps we have executed MassErase commands. Then the system left in some state that MDM-AP-CTRL registershows always 0x00000001 - MassErase is ongoing and memory access through AHB-AP is failing.

## 0. DP Init
SWDReadDP 0x00        # returned 0x0BC11477
SWDWriteDP 0x00 0x0000001E
SWDWriteDP 0x01 0x00000000
SWDWriteDP 0x01 0x50000000
SWDReadDP 0x01        # returned 0xF0000040

## Reading ID's
SWDWriteDP 0x02 0x010000F0
SWDReadAP 0x03        # returned 0x00000000
SWDReadDP 0x03        # returned 0x001C0020
SWDWriteDP 0x02 0x000000F0
SWDReadAP 0x03        # returned 0x00000000
SWDReadDP 0x03        # returned 0x04770031
#DP_ID   = 0x0BC11477
#AP_ID   = 0x001C0020
#AHB_ID  = 0x04770031

1. AN12130 MassErase

SWDReadAP 0x00        # returned 0x00000000

SWDReadDP 0x03        # returned 0x00000034

# MDM-AP Mass erase enabled

SWDWriteAP 0x01 0x00000009  #MDM_AP_CTRL_MASS_ERASE | MDM_AP_CTRL_SYSTEM_RESET

SWDReadAP 0x01        # returned 0x00000001
SWDReadDP 0x03        # returned 0x00000001

SWDReadAP 0x01        # returned 0x00000001
SWDReadDP 0x03        # returned 0x00000001

## AN12130 SWD connection steps

SWDWriteDP 0x02 0x01000000
SWDWriteAP 0x01 0x00000008
SWDReadAP 0x00        # returned 0x00000001
SWDReadDP 0x03        # returned 0x00000034
...
SWDReadAP 0x00        # returned 0x00000000
SWDReadDP 0x03        # returned 0x0000003E  # Flash is initialized

SWDReadAP 0x01        # returned 0x00000000
SWDReadDP 0x03        # returned 0x00000001
#MDM-AP ctrl: 0x00000001                     # MassErase is ON???

#MDM-AP reset + debug request
SWDWriteAP 0x01 0x0000000C
#MDM-AP Clearing Reset
SWDWriteAP 0x01 0x00000004

SWDReadDP 0x01        # returned 0xF0000040
#DP_CTRL: 0xF0000040
#DP_CTRL_READOK bit set

SWDWriteDP 0x02 0x01000000
SWDReadAP 0x00        # returned 0x00000000
SWDReadDP 0x03        # returned 0x00000034
#MDM-AP Status: 0x00000034
#System is secured.
#System is in RESET
#System can be mass erased

SWDReadAP 0x01        # returned 0x00000000
SWDReadDP 0x03        # returned 0x00000001
#MDM-AP Ctrl: 0x00000001
#Mass erase is ON ???

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NXP TechSupport
NXP TechSupport

Hello Pauli,

In the following section explains a reason why this bit is asserted in the MDM-AP register:

pastedImage_1.png

If the MCU is not secured it could be possible to recover from this state writing o the FSEC register but if this is the case it will be impossible to program again this MCU.

Best regards,

Alexis Andalon

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