Flash Memory issues on a custom hardware using S32k146

[akhilranga]

Hi all,

I am using a S32k146 micro on a custom built Vehicle Control Unit, wrote an application code which i was debugging using RAM debug on S32Design Studio for ARM software and the application code is built on the default settings of S3k14x EAR SDK v0.8.6's Hello World example code. I finished writing the code and also successfully testing/debugging it using the RAM Debug , but when i wanted to debug using the flash i am getting the follwing error shown below.  The hardware i am using for Debugging is Jlink. Can please some one assess the error and help me what can be done to successfully use flash

SEGGER J-Link GDB Server V7.94c Command Line Version

JLinkARM.dll V7.94c (DLL compiled Jan  3 2024 15:20:10)

Command line: -if swd -device S32K146 -endian little -speed 1000 -port 2331 -swoport 2332 -telnetport 2333 -vd -ir -localhostonly 1 -singlerun -strict -timeout 0 -nogui
-----GDB Server start settings-----
GDBInit file:                  none
GDB Server Listening port:     2331
SWO raw output listening port: 2332
Terminal I/O port:             2333
Accept remote connection:      localhost only
Generate logfile:              off
Verify download:               on
Init regs on start:            on
Silent mode:                   off
Single run mode:               on
Target connection timeout:     0 ms
------J-Link related settings------
J-Link Host interface:         USB
J-Link script:                 none
J-Link settings file:          none
------Target related settings------
Target device:                 S32K146
Target device parameters:      none
Target interface:              SWD
Target interface speed:        1000kHz
Target endian:                 little

Connecting to J-Link...
J-Link is connected.
Firmware: J-Link ARM V8 compiled Nov 28 2014 13:44:46
Hardware: V8.00
Feature(s): RDI,FlashDL,FlashBP,JFlash,GDB
Checking target voltage...
Target voltage: 3.29 V
Listening on TCP/IP port 2331
Connecting to target...
Initializing CPU registers...Connected to target
Waiting for GDB connection...Connected to 127.0.0.1
GDB client (conn. 988) requested target.xml from GDB Server
Reading common registers: Read register 'r0' (4 bytes) from hardware: 0x00000000
Read register 'r1' (4 bytes) from hardware: 0x00000000
Read register 'r2' (4 bytes) from hardware: 0x00000000
Read register 'r3' (4 bytes) from hardware: 0x00000000
Read register 'r4' (4 bytes) from hardware: 0x00000000
Read register 'r5' (4 bytes) from hardware: 0x00000000
Read register 'r6' (4 bytes) from hardware: 0x00000000
Read register 'r7' (4 bytes) from hardware: 0x00000000
Read register 'r8' (4 bytes) from hardware: 0x00000000
Read register 'r9' (4 bytes) from hardware: 0x00000000
Read register 'r10' (4 bytes) from hardware: 0x00000000
Read register 'r11' (4 bytes) from hardware: 0x00000000
Read register 'r12' (4 bytes) from hardware: 0x00000000
Read register 'sp' (4 bytes) from hardware: 0x00000000
Read register 'lr' (4 bytes) from hardware: 0x00000000
Read register 'pc' (4 bytes) from hardware: 0x00000000
Read register 'xpsr' (4 bytes) from hardware: 0x00000001
Read 4 bytes @ address 0x00000000 (Data = 0xFFFFFFFF)
Received monitor command: speed 1000
Target interface speed set to 1000 kHz
Received monitor command: clrbp
Received monitor command: reset
Resetting target
Received monitor command: halt
Halting target CPU...
...Target halted (PC = 0xFFFFFFFE)
Received monitor command: regs
R0 = 00000000, R1 = 00000000, R2 = 00000000, R3 = 00000000
R4 = 00000000, R5 = 00000000, R6 = 00000000, R7 = 00000000
R8 = 00000000, R9 = 00000000, R10= 00000000, R11= 00000000
R12= 00000000, R13= FFFFFFFC, MSP= FFFFFFFC, PSP= 00000000
R14(LR) = FFFFFFFF, R15(PC) = FFFFFFFE
XPSR 01000000, APSR 00000000, EPSR 01000000, IPSR 00000000
CFBP 00000000, CONTROL 00, FAULTMASK 00, BASEPRI 00, PRIMASK 00

Security extension regs:
MSP_S  = 00000000, MSPLIM_S  = 00000000
PSP_S  = 00000000, PSPLIM_S  = 00000000
MSP_NS = FFFFFFFC, MSPLIM_NS = 00000000
PSP_NS = 00000000, PSPLIM_NS = 00000000
CONTROL_S  00, FAULTMASK_S  00, BASEPRI_S  00, PRIMASK_S  00
CONTROL_NS 00, FAULTMASK_NS 00, BASEPRI_NS 00, PRIMASK_NS 00

Reading common registers: Read register 'r0' (4 bytes) from hardware: 0x00000000
Read register 'r1' (4 bytes) from hardware: 0x00000000
Read register 'r2' (4 bytes) from hardware: 0x00000000
Read register 'r3' (4 bytes) from hardware: 0x00000000
Read register 'r4' (4 bytes) from hardware: 0x00000000
Read register 'r5' (4 bytes) from hardware: 0x00000000
Read register 'r6' (4 bytes) from hardware: 0x00000000
Read register 'r7' (4 bytes) from hardware: 0x00000000
Read register 'r8' (4 bytes) from hardware: 0x00000000
Read register 'r9' (4 bytes) from hardware: 0x00000000
Read register 'r10' (4 bytes) from hardware: 0x00000000
Read register 'r11' (4 bytes) from hardware: 0x00000000
Read register 'r12' (4 bytes) from hardware: 0x00000000
Read register 'sp' (4 bytes) from hardware: 0xFCFFFFFF
Read register 'lr' (4 bytes) from hardware: 0xFFFFFFFF
Read register 'pc' (4 bytes) from hardware: 0xFEFFFFFF
Read register 'xpsr' (4 bytes) from hardware: 0x00000001
WARNING: Failed to read memory @ address 0xFFFFFFFE
Received monitor command: speed auto
Select auto target interface speed (2000 kHz)
Received monitor command: flash breakpoints 1
Flash breakpoints enabled
Received monitor command: semihosting enable
Semi-hosting enabled (Handle on breakpoint instruction hit)
Received monitor command: semihosting IOClient 1
Semihosting I/O set to TELNET Client
Received monitor command: SWO DisableTarget 0xFFFFFFFF
SWO disabled successfully.
Received monitor command: SWO EnableTarget 0 0 0x1 0
ERROR: Failed to restore original RAM content after CPU clock frequency detection!

Failed to enable SWO. Could not measure target CPU frequency.
WARNING: Failed to read memory @ address 0xFFFFFFFE
Downloading 1024 bytes @ address 0x00000000 - Verified OK
Downloading 16 bytes @ address 0x00000400 - Verified OK
Downloading 4096 bytes @ address 0x00000410 - Verified OK
Downloading 4096 bytes @ address 0x00001410 - Verified OK
Downloading 4096 bytes @ address 0x00002410 - Verified OK
Downloading 4096 bytes @ address 0x00003410 - Verified OK
Downloading 2752 bytes @ address 0x00004410 - Verified OK
Downloading 4 bytes @ address 0x00004ED0 - Verified OK
Downloading 4 bytes @ address 0x00004ED4 - Verified OK
Downloading 3452 bytes @ address 0x00004ED8 - Verified OK
Writing register 'pc' = 0x0000046C
ERROR: Failed to preserve target RAM @ 0x1FFF0000-0x2000EFFF.
Failed to prepare for programming.
Cannot read register 16 (XPSR) while CPU is running
Cannot read register 20 (CFBP) while CPU is running
Cannot read register 0 (R0) while CPU is running
Cannot read register 1 (R1) while CPU is running
Cannot read register 2 (R2) while CPU is running
Cannot read register 3 (R3) while CPU is running
Cannot read register 4 (R4) while CPU is running
Cannot read register 5 (R5) while CPU is running
Cannot read register 6 (R6) while CPU is running
Cannot read register 7 (R7) while CPU is running
Cannot read register 8 (R8) while CPU is running
Cannot read register 9 (R9) while CPU is running
Cannot read register 10 (R10) while CPU is running
Cannot read register 11 (R11) while CPU is running
Cannot read register 12 (R12) while CPU is running
Cannot read register 14 (R14) while CPU is running
Cannot read register 15 (R15) while CPU is running
Cannot read register 17 (MSP) while CPU is running
Cannot read register 18 (PSP) whi
Read 4 bytes @ address 0x0000046C (Data = 0x00000000)
Read 2 bytes @ address 0x00000854 (Data = 0x0000)
WARNING: Failed to read memory @ address 0x00000854
Read 2 bytes @ address 0x000004F2 (Data = 0x0000)
WARNING: Failed to read memory @ address 0x00000518
Read 2 bytes @ address 0x00000676 (Data = 0x0000)
Read 2 bytes @ address 0x00000676 (Data = 0x0000)
Read 2 bytes @ address 0x0000058A (Data = 0x0000)
Read 2 bytes @ address 0x0000058A (Data = 0x0000)
Received monitor command: clrbp
Received monitor command: reset
Resetting target
Received monitor command: halt
Halting target CPU...
...Target halted (PC = 0xFFFFFFFE)
Read 2 bytes @ address 0x00000854 (Data = 0xFFFF)
Read 2 bytes @ address 0x00000854 (Data = 0xFFFF)
Read 2 bytes @ address 0x00000854 (Data = 0xFFFF)
Received monitor command: regs
R0 = 00000000, R1 = 00000000, R2 = 00000000, R3 = 00000000
R4 = 00000000, R5 = 00000000, R6 = 00000000, R7 = 00000000
R8 = 00000000, R9 = 00000000, R10= 00000000, R11= 00000000
R12= 00000000, R13= FFFFFFFC, MSP= FFFFFFFC, PSP= 00000000
R14(LR) = FFFFFFFF, R15(PC) = FFFFFFFE
XPSR 01000000, APSR 00000000, EPSR 01000000, IPSR 00000000
CFBP 00000000, CONTROL 00, FAULTMASK 00, BASEPRI 00, PRIMASK 00

Security extension regs:
MSP_S  = 00000000, MSPLIM_S  = 00000000
PSP_S  = 00000000, PSPLIM_S  = 00000000
MSP_NS = FFFFFFFC, MSPLIM_NS = 00000000
PSP_NS = 00000000, PSPLIM_NS = 00000000
CONTROL_S  00, FAULTMASK_S  00, BASEPRI_S  00, PRIMASK_S  00
CONTROL_NS 00, FAULTMASK_NS 00, BASEPRI_NS 00, PRIMASK_NS 00

Reading common registers: Read register 'r0' (4 bytes) from hardware: 0x00000000
Read register 'r1' (4 bytes) from hardware: 0x00000000
Read register 'r2' (4 bytes) from hardware: 0x00000000
Read register 'r3' (4 bytes) from hardware: 0x00000000
Read register 'r4' (4 bytes) from hardware: 0x00000000
Read register 'r5' (4 bytes) from hardware: 0x00000000
Read register 'r6' (4 bytes) from hardware: 0x00000000
Read register 'r7' (4 bytes) from hardware: 0x00000000
Read register 'r8' (4 bytes) from hardware: 0x00000000
Read register 'r9' (4 bytes) from hardware: 0x00000000
Read register 'r10' (4 bytes) from hardware: 0x00000000
Read register 'r11' (4 bytes) from hardware: 0x00000000
Read register 'r12' (4 bytes) from hardware: 0x00000000
Read register 'sp' (4 bytes) from hardware: 0xFCFFFFFF
Read register 'lr' (4 bytes) from hardware: 0xFFFFFFFF
Read register 'pc' (4 bytes) from hardware: 0xFEFFFFFF
Read register 'xpsr' (4 bytes) from hardware: 0x00000001
WARNING: Failed to read memory @ address 0xFFFFFFFE
Setting breakpoint @ address 0x00000854, Kind = 2, Type = THUMB, BPHandle = 0x0001
Starting target CPU...
Debugger requested to halt target...
Reading common registers: ERROR: Cannot read register 0 (R0) while CPU is running
Read register 'r0' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 1 (R1) while CPU is running
Read register 'r1' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 2 (R2) while CPU is running
Read register 'r2' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 3 (R3) while CPU is running
Read register 'r3' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 4 (R4) while CPU is running
Read register 'r4' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 5 (R5) while CPU is running
Read register 'r5' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 6 (R6) while CPU is running
Read register 'r6' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 7 (R7) while CPU is running
Read register 'r7' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 8 (R8) while CPU is running
Read register 'r8' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 9 (R9) while CPU is running
Read register 'r9' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 10 (R10) while CPU is running
Read register 'r10' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 11 (R11) while CPU is running
Read register 'r11' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 12 (R12) while CPU is running
Read register 'r12' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 13 (R13) while CPU is running
Read register 'sp' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 14 (R14) while CPU is running
Read register 'lr' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 15 (R15) while CPU is running
Read register 'pc' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 16 (XPSR) while CPU is running
Read register 'xpsr' (4 bytes) from hardware: 0xEFBEADDE
WARNING: Failed to read memory @ address 0xDEADBEEE
Removing breakpoint @ address 0x00000854, Size = 2
Starting target CPU...

[lukaszadrapa · Accepted solution]

Hi @akhilranga 

First of all, S3k14x EAR SDK v0.8.6 is pretty old, it's only Early Access Release, it's not RTM production version. I do not recommend to use this SDK version.
The latest SDK version is 4.0.3 which is compatible with S32 Design Studio 3.4.
And there are even newer Real Time Drivers RTD which replace older SDK and Autosar MCAL. But that's another story.

The log says:
Firmware: J-Link ARM V8 compiled Nov 28 2014 13:44:46

This seems to be very old. I believe this should be solved by firmware update of the J-Link. Please contact Segger if some help with the update is needed.

Regards,
Lukas

[MihaiC]

Hi @lukaszadrapa ,

I'm facing a similar issue when using a custom hardware with S32K144 (#FS32K144ULT0VLHT); I've tried several options starting with S32 DS for ARM v2.2 with patches and ending with S32 DS 3.6 with the same result. The segger J-link commander is the latest version (January 2025). 

And in my tests I'm using dummy app , so there is something wrong with the initial settings on the framework or with the way we are using the hardware. 

See the output (quite similar in different tooling and SDK - started with RTM 3.0.0 and ended with RTM 4.0.3). Any clues ?

SEGGER J-Link GDB Server V8.26 Command Line Version

JLinkARM.dll V8.26 (DLL compiled Apr 11 2025 07:53:44)

Command line: -if swd -device S32K144 -endian little -speed auto -port 2331 -swoport 2332 -telnetport 2333 -vd -ir -localhostonly 1 -singlerun -strict -timeout 0 -nogui
-----GDB Server start settings-----
GDBInit file: none
GDB Server Listening port: 2331
SWO raw output listening port: 2332
Terminal I/O port: 2333
Accept remote connection: localhost only
Generate logfile: off
Verify download: on
Init regs on start: on
Silent mode: off
Single run mode: on
Target connection timeout: 0 ms
------J-Link related settings------
J-Link Host interface: USB
J-Link script: none
J-Link settings file: none
------Target related settings------
Target device: S32K144
Target device parameters: none
Target interface: SWD
Target interface speed: auto
Target endian: little

Connecting to J-Link...
J-Link is connected.
Firmware: J-Link V12 compiled Apr 1 2025 10:02:39
Hardware: V12.00
S/N: 52003288
Feature(s): GDB
Checking target voltage...
Target voltage: 4.97 V
Listening on TCP/IP port 2331
Connecting to target...
Initializing CPU registers...Connected to target
Waiting for GDB connection...Connected to 127.0.0.1
GDB client (conn. 88) requested target.xml from GDB Server
Reading common registers: Read register 'r0' (4 bytes) from hardware: 0x00000000
Read register 'r1' (4 bytes) from hardware: 0x00000000
Read register 'r2' (4 bytes) from hardware: 0x00000000
Read register 'r3' (4 bytes) from hardware: 0x00000000
Read register 'r4' (4 bytes) from hardware: 0x00000000
Read register 'r5' (4 bytes) from hardware: 0x00000000
Read register 'r6' (4 bytes) from hardware: 0x00000000
Read register 'r7' (4 bytes) from hardware: 0x00000000
Read register 'r8' (4 bytes) from hardware: 0x00000000
Read register 'r9' (4 bytes) from hardware: 0x00000000
Read register 'r10' (4 bytes) from hardware: 0x00000000
Read register 'r11' (4 bytes) from hardware: 0x00000000
Read register 'r12' (4 bytes) from hardware: 0x00000000
Read register 'sp' (4 bytes) from hardware: 0x00000000
Read register 'lr' (4 bytes) from hardware: 0x00000000
Read register 'pc' (4 bytes) from hardware: 0x00000000
Read register 'xpsr' (4 bytes) from hardware: 0x00000001
Read 4 bytes @ address 0x00000000 (Data = 0x20007000)
Read 2 bytes @ address 0x00000000 (Data = 0x7000)
Received monitor command: speed 1000
Target interface speed set to 1000 kHz
Received monitor command: clrbp
Received monitor command: reset
Resetting target
Received monitor command: halt
Halting target CPU...
...Target halted (PC = 0x00000410)
Received monitor command: regs
R0 = 00000000, R1 = 00000000, R2 = 00000000, R3 = 00000000
R4 = 00000000, R5 = 00000000, R6 = 00000000, R7 = 00000000
R8 = 00000000, R9 = 00000000, R10= 00000000, R11= 00000000
R12= 00000000, R13= 20007000, MSP= 20007000, PSP= 00000000
R14(LR) = FFFFFFFF, R15(PC) = 00000410
XPSR 01000000, APSR 00000000, EPSR 01000000, IPSR 00000000
CFBP 00000000, CONTROL 00, FAULTMASK 00, BASEPRI 00, PRIMASK 00

Security extension regs:
MSP_S = 00000000, MSPLIM_S = 00000000
PSP_S = 00000000, PSPLIM_S = 00000000
MSP_NS = 20007000, MSPLIM_NS = 00000000
PSP_NS = 00000000, PSPLIM_NS = 00000000
CONTROL_S 00, FAULTMASK_S 00, BASEPRI_S 00, PRIMASK_S 00
CONTROL_NS 00, FAULTMASK_NS 00, BASEPRI_NS 00, PRIMASK_NS 00

Reading common registers: Read register 'r0' (4 bytes) from hardware: 0x00000000
Read register 'r1' (4 bytes) from hardware: 0x00000000
Read register 'r2' (4 bytes) from hardware: 0x00000000
Read register 'r3' (4 bytes) from hardware: 0x00000000
Read register 'r4' (4 bytes) from hardware: 0x00000000
Read register 'r5' (4 bytes) from hardware: 0x00000000
Read register 'r6' (4 bytes) from hardware: 0x00000000
Read register 'r7' (4 bytes) from hardware: 0x00000000
Read register 'r8' (4 bytes) from hardware: 0x00000000
Read register 'r9' (4 bytes) from hardware: 0x00000000
Read register 'r10' (4 bytes) from hardware: 0x00000000
Read register 'r11' (4 bytes) from hardware: 0x00000000
Read register 'r12' (4 bytes) from hardware: 0x00000000
Read register 'sp' (4 bytes) from hardware: 0x00700020
Read register 'lr' (4 bytes) from hardware: 0xFFFFFFFF
Read register 'pc' (4 bytes) from hardware: 0x10040000
Read register 'xpsr' (4 bytes) from hardware: 0x00000001
Read 4 bytes @ address 0x00000410 (Data = 0xF04FB672)
Read 2 bytes @ address 0x00000410 (Data = 0xB672)
Received monitor command: speed 4000
Target interface speed set to 4000 kHz
Received monitor command: flash breakpoints 1
Flash breakpoints enabled
Received monitor command: semihosting enable
Semi-hosting enabled (Handle on breakpoint instruction hit)
Received monitor command: semihosting IOClient 1
Semihosting I/O set to TELNET Client
Received monitor command: SWO DisableTarget 0xFFFFFFFF
SWO disabled successfully.
Received monitor command: SWO EnableTarget 0 0 0x1 0
Failed to enable SWO. Could not measure target CPU frequency.
Read 4 bytes @ address 0x00000410 (Data = 0xF04FB672)
Read 2 bytes @ address 0x00000410 (Data = 0xB672)
Read 2 bytes @ address 0x1FFF8560 (Data = 0x6896)
Read 2 bytes @ address 0x1FFF8560 (Data = 0x6896)
Received monitor command: clrbp
Received monitor command: reset
Resetting target
Received monitor command: halt
Halting target CPU...
...Target halted (PC = 0x00000410)
Downloading 1024 bytes @ address 0x1FFF8000 - Verified OK
Downloading 380 bytes @ address 0x1FFF8400 - Verified OK
Writing register 'pc' = 0x1FFF8400
Read 2 bytes @ address 0x1FFF8560 (Data = 0x4A03)
Read 4 bytes @ address 0x1FFF8570 (Data = 0x20000000)
Read 2 bytes @ address 0x1FFF8560 (Data = 0x4A03)
Read 4 bytes @ address 0x1FFF8400 (Data = 0xF04FB672)
Read 2 bytes @ address 0x1FFF8400 (Data = 0xB672)
Received monitor command: regs
R0 = 00000000, R1 = 00000000, R2 = 00000000, R3 = 00000000
R4 = 00000000, R5 = 00000000, R6 = 00000000, R7 = 00000000
R8 = 00000000, R9 = 00000000, R10= 00000000, R11= 00000000
R12= 00000000, R13= 20007000, MSP= 20007000, PSP= 00000000
R14(LR) = FFFFFFFF, R15(PC) = 1FFF8400
XPSR 01000000, APSR 00000000, EPSR 01000000, IPSR 00000000
CFBP 00000000, CONTROL 00, FAULTMASK 00, BASEPRI 00, PRIMASK 00

Security extension regs:
MSP_S = 00000000, MSPLIM_S = 00000000
PSP_S = 00000000, PSPLIM_S = 00000000
MSP_NS = 20007000, MSPLIM_NS = 00000000
PSP_NS = 00000000, PSPLIM_NS = 00000000
CONTROL_S 00, FAULTMASK_S 00, BASEPRI_S 00, PRIMASK_S 00
CONTROL_NS 00, FAULTMASK_NS 00, BASEPRI_NS 00, PRIMASK_NS 00

Reading common registers: Read register 'r0' (4 bytes) from hardware: 0x00000000
Read register 'r1' (4 bytes) from hardware: 0x00000000
Read register 'r2' (4 bytes) from hardware: 0x00000000
Read register 'r3' (4 bytes) from hardware: 0x00000000
Read register 'r4' (4 bytes) from hardware: 0x00000000
Read register 'r5' (4 bytes) from hardware: 0x00000000
Read register 'r6' (4 bytes) from hardware: 0x00000000
Read register 'r7' (4 bytes) from hardware: 0x00000000
Read register 'r8' (4 bytes) from hardware: 0x00000000
Read register 'r9' (4 bytes) from hardware: 0x00000000
Read register 'r10' (4 bytes) from hardware: 0x00000000
Read register 'r11' (4 bytes) from hardware: 0x00000000
Read register 'r12' (4 bytes) from hardware: 0x00000000
Read register 'sp' (4 bytes) from hardware: 0x00700020
Read register 'lr' (4 bytes) from hardware: 0xFFFFFFFF
Read register 'pc' (4 bytes) from hardware: 0x0084FF1F
Read register 'xpsr' (4 bytes) from hardware: 0x00000001
Read 4 bytes @ address 0x1FFF8400 (Data = 0xF04FB672)
Read 2 bytes @ address 0x1FFF8400 (Data = 0xB672)
Starting target CPU...
ERROR: Cannot read register 15 (R15) while CPU is running
Reading common registers: ERROR: Cannot read register 0 (R0) while CPU is running
Read register 'r0' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 1 (R1) while CPU is running
Read register 'r1' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 2 (R2) while CPU is running
Read register 'r2' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 3 (R3) while CPU is running
Read register 'r3' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 4 (R4) while CPU is running
Read register 'r4' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 5 (R5) while CPU is running
Read register 'r5' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 6 (R6) while CPU is running
Read register 'r6' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 7 (R7) while CPU is running
Read register 'r7' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 8 (R8) while CPU is running
Read register 'r8' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 9 (R9) while CPU is running
Read register 'r9' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 10 (R10) while CPU is running
Read register 'r10' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 11 (R11) while CPU is running
Read register 'r11' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 12 (R12) while CPU is running
Read register 'r12' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 13 (R13) while CPU is running
Read register 'sp' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 14 (R14) while CPU is running
Read register 'lr' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 15 (R15) while CPU is running
Read register 'pc' (4 bytes) from hardware: 0xEFBEADDE
ERROR: Cannot read register 16 (XPSR) while CPU is running
Read register 'xpsr' (4 bytes) from hardware: 0xEFBEADDE
WARNING: Failed to read memory @ address 0xDEADBEEE
WARNING: Failed to read memory @ address 0xDEADBEEE
WARNING: Target connection lost.

[MihaiC]

in my case the issue was created by the custom hardware based on S32K144 MCU. We have a FS2303 SBC in our setup which resets every 0.7 seconds - see my colleague thread for more details - S32K144 + FS2303 SBC reset not released - NXP Community. After removing the SBC and power directly the MCU the debugger worked as expected .