Chip erase?

Make sure flash is not busy and halt CPU

Block 1
@3310.184188ms: SWD Reset occured.
@3310.459875ms:Read  Buf(0x5000c01c)=0x00000000   <- read undocumented ISP register
@3310.553875ms:Write BD (0xe000edf0)=0xa05f0003   <- Debug Halting Control Reg STOP
@3310.583375ms:Read  Buf(0xe000edf0)=0x00000000

Do something with debug access port

0xe0002000  Debug access port / Breakpoint unit

Block2
@3312.198438ms:Write BD (0xe0002008)=0x00000000
@3312.227937ms:Read  Buf(0xe0002008)=0xe00ff003
@3312.266625ms:Write BD (0xe000200c)=0x00000000
@3312.296125ms:Read  Buf(0xe000200c)=0x04770021
@3312.420437ms:Write BD (0xe0002010)=0x00000000
@3312.449938ms:Read  Buf(0xe0002010)=0x00000000
@3312.488438ms:Write BD (0xe0002014)=0x00000000
@3312.517938ms:Read  Buf(0xe0002014)=0x00000000
@3312.677750ms:Read  Buf(0xe0002008)=0x00000000
@3312.754000ms:Read  Buf(0xe000200c)=0x00000000
@3312.915937ms:Read  Buf(0xe0002010)=0x00000000
@3312.992125ms:Read  Buf(0xe0002014)=0x00000000

Block3 

Write Powercon. Oscillators enabled?

@3315.189313ms:Write BD (0x50000100)=0x00000059		; Unlock registers with magic sequence
@3315.218813ms:Read  Buf(0x50000100)=0x00000000
@3315.256750ms:Write BD (0x50000100)=0x00000016
@3315.286250ms:Read  Buf(0x50000100)=0x00000000
@3315.324187ms:Write BD (0x50000100)=0x00000088
@3315.353688ms:Read  Buf(0x50000100)=0x00000000
@3315.512938ms:Read  Buf(0x50000200)=0x0000001c


@3315.698313ms:Read  Buf(0x5000c000)=0x00000032     ; ISP control 
@3315.738438ms:Write BD (0x5000c000)=0x00000033		; ISP Control=0x33 Set bit 1= Enable ISP function... really?
@3315.767938ms:Read  Buf(0x5000c000)=0x00000000
@3315.927375ms:Read  Buf(0x5000c01c)=0x00000000
@3315.967688ms:Write BD (0x5000c01c)=0x00000001		; 0x5000C01C=1 Interesting. Undocumented register in Flash controller 
@3315.997188ms:Read  Buf(0x5000c01c)=0x04770021		; Buffer after write - "unpredictable"

@3316.156188ms:Read  Buf(0x5000c000)=0x00000033
@3316.232000ms:Read  Buf(0x5000c000)=0x00000033		; check ISPFF=0
@3316.400563ms:Read  Buf(0x5000c010)=0x00000000		; ISP not busy?
@3316.527437ms:Write BD (0x5000c00c)=0x00000026     ; ISP Command=0x26. Undocumented combination. Enable page erase and program
@3316.556938ms:Read  Buf(0x5000c00c)=0x04770021		; Buffer after write - "unpredictable"
@3316.595000ms:Write BD (0x5000c004)=0x00000000		; ISP Address=0x00000000 Start of APROM
@3316.624500ms:Read  Buf(0x5000c004)=0x00000000
@3316.748562ms:Write BD (0x5000c010)=0x00000001		; ISP Trigger=1 -> Start ISP Operation
@3316.778125ms:Read  Buf(0x5000c010)=0x00000000		; First read is invalid? better replicate or trouble looms
@3316.852250ms:Read  Buf(0x5000c010)=0x00000001		; Operation is ongoing while ISP Trigger reads 

... poll poll poll ...

@3326.586938ms:Read  Buf(0x5000c010)=0x00000001
@3326.664813ms:Read  Buf(0x5000c010)=0x00000001
@3326.742625ms:Read  Buf(0x5000c010)=0x00000001
@3326.820500ms:Read  Buf(0x5000c010)=0x00000001
@3326.898375ms:Read  Buf(0x5000c010)=0x00000000		; and done. After ~10ms
@3327.060438ms:Read  Buf(0x5000c000)=0x00000033		; check ISPFF=0	
@3327.224875ms:Read  Buf(0x5000c010)=0x00000000

Is LDROM empty?
@3327.351688ms:Write BD (0x5000c00c)=0x00000000		; ISP Command = Read
@3327.381188ms:Read  Buf(0x5000c00c)=0x04770021		; Buffer after write - "unpredictable"
@3327.419250ms:Write BD (0x5000c004)=0x00100000		; ISP Address=0x00100000 LDROM
@3327.448750ms:Read  Buf(0x5000c004)=0x00000000
@3327.572875ms:Write BD (0x5000c010)=0x00000001 	; ISP Trigger=1 -> Start ISP Operation
@3327.602375ms:Read  Buf(0x5000c010)=0x00000000		
@3327.676500ms:Read  Buf(0x5000c010)=0x00000000		; already done
@3327.838563ms:Read  Buf(0x5000c000)=0x00000033		; check ISPFF=0	
@3327.914625ms:Read  Buf(0x5000c008)=0xffffffff		; ISP Data register ... looks empty
@3328.078625ms:Read  Buf(0x5000c010)=0x00000000

Is APROM empty?
@3328.205438ms:Write BD (0x5000c00c)=0x00000000		; ISP Command = Read
@3328.234937ms:Read  Buf(0x5000c00c)=0x04770021	    ; Buffer after write - "unpredictable"
@3328.273000ms:Write BD (0x5000c004)=0x00000000		; ISP Address=0x00100000 APROM
@3328.302500ms:Read  Buf(0x5000c004)=0x00000000
@3328.426625ms:Write BD (0x5000c010)=0x00000001		; ISP Trigger=1 -> Start ISP Operation
@3328.456125ms:Read  Buf(0x5000c010)=0x00000000
@3328.530250ms:Read  Buf(0x5000c010)=0x00000000		; done
@3328.692375ms:Read  Buf(0x5000c000)=0x00000033
@3328.768437ms:Read  Buf(0x5000c008)=0xffffffff		; ISP Data register ... looks empty	
@3328.932375ms:Read  Buf(0x5000c010)=0x00000000

Is config empty?
@3329.059250ms:Write BD (0x5000c00c)=0x00000000		; ISP Command = Read
@3329.088750ms:Read  Buf(0x5000c00c)=0x04770021	
@3329.126813ms:Write BD (0x5000c004)=0x00300000		; ISP Address=0x00100000 Config0
@3329.156313ms:Read  Buf(0x5000c004)=0x00000000
@3329.280438ms:Write BD (0x5000c010)=0x00000001
@3329.309938ms:Read  Buf(0x5000c010)=0x00000000
@3329.384063ms:Read  Buf(0x5000c010)=0x00000000
@3329.546125ms:Read  Buf(0x5000c000)=0x00000033
@3329.622188ms:Read  Buf(0x5000c008)=0xffffffff		; Is empty,too
@3329.787875ms:Read  Buf(0x5000c010)=0x00000000

@3329.949625ms:Read  Buf(0x5000c000)=0x00000033
@3329.989687ms:Write BD (0x5000c000)=0x00000032		; Disable ISP
@3330.019188ms:Read  Buf(0x5000c000)=0x00000000
@3330.178625ms:Read  Buf(0x5000c01c)=0x00000001
@3330.218938ms:Write BD (0x5000c01c)=0x00000000		; Write 0 to undocumented register

@3330.248437ms:Read  Buf(0x5000c01c)=0x04770021

... and done

@3330.326938ms: SWD Reset occured.
@3330.364250ms: SWD Reset occured.

Reset CPU

@3330.640000ms:Read  Buf(0x5000c01c)=0x00000000
@3330.733938ms:Write BD (0xe000edf0)=0xa05f0003		; Halt CPU
@3330.763438ms:Read  Buf(0xe000edf0)=0x00000000
@3330.922813ms:Read  Buf(0xe000ed00)=0x410cc200		; Read CPUID
@3331.048938ms:Write BD (0xe000edfc)=0x00000001
@3331.078437ms:Read  Buf(0xe000edfc)=0x04770021
@3331.152125ms:Read  Buf(0xe000edf0)=0x03030003
@3331.228875ms:Read  Buf(0xe000edf0)=0x00030003
@3331.270125ms:Write BD (0xe000edfc)=0x01000000
@3331.299625ms:Read  Buf(0xe000edfc)=0x04770021
@3331.458750ms:Read  Buf(0xe0002000)=0x00000041		; Doing something with the debug port
@3331.498813ms:Write BD (0xe0002000)=0x00000003
@3331.528313ms:Read  Buf(0xe0002000)=0x00000000
@3331.566438ms:Write BD (0xe0002008)=0x00000000
@3331.595938ms:Read  Buf(0xe0002008)=0xe00ff003
@3331.634125ms:Write BD (0xe000200c)=0x00000000
@3331.663625ms:Read  Buf(0xe000200c)=0x04770021
@3331.787438ms:Write BD (0xe0002010)=0x00000000
@3331.817000ms:Read  Buf(0xe0002010)=0x00000000
@3331.854938ms:Write BD (0xe0002014)=0x00000000
@3331.884437ms:Read  Buf(0xe0002014)=0x00000000
@3332.044250ms:Read  Buf(0xe0001000)=0x20000000
@3332.170125ms:Write BD (0xe0001024)=0x0000001f
@3332.199625ms:Read  Buf(0xe0001024)=0x00000000
@3332.272812ms:Read  Buf(0xe0001024)=0x0000001f
@3332.313250ms:Write BD (0xe0001028)=0x00000000
@3332.342750ms:Read  Buf(0xe0001028)=0xe00ff003
@3332.466563ms:Write BD (0xe0001038)=0x00000000
@3332.496062ms:Read  Buf(0xe0001038)=0xe00ff003
@3332.656063ms:Read  Buf(0xe000edf0)=0x00030003
@3332.732875ms:Read  Buf(0xe000edf0)=0x00030003
@3332.774000ms:Write BD (0xe000edfc)=0x00000001
@3332.803500ms:Read  Buf(0xe000edfc)=0x04770021
@3332.876688ms:Read  Buf(0xe000edf0)=0x00030003
@3333.038063ms:Read  Buf(0x50000210)=0x0000003f
@3333.078250ms:Write BD (0x50000210)=0x0000003f
@3333.107750ms:Read  Buf(0x50000210)=0x00000000
@3333.231813ms:Write BD (0xe000ed0c)=0x05fa0004	  ; Request system level reset		
@3333.261313ms:Read  Buf(0xe000ed0c)=0x04770021
@3333.420563ms:Read  Buf(0xe000edf0)=0x03030003	  ; cpu is halted
@3333.498437ms:Read  Buf(0xe000edf0)=0x00030003
@3333.538875ms:Write BD (0xe000edfc)=0x01000000
@3333.568375ms:Read  Buf(0xe000edfc)=0x04770021
@3333.606313ms:Write BD (0xe000edf4)=0x00000010
@3333.751500ms:Read  Buf(0xe000edf8)=0xc1000000
@3333.827438ms:Read  Buf(0xe000edf0)=0x00030003
@3333.904188ms:Read  Buf(0xe000edf0)=0x00030003
@3334.036562ms:Write BD (0x50000100)=0x00000059  ; unlock system registers 
@3334.066063ms:Read  Buf(0x50000100)=0x00000000
@3334.104000ms:Write BD (0x50000100)=0x00000016	 
@3334.133500ms:Read  Buf(0x50000100)=0x00000000
@3334.171375ms:Write BD (0x50000100)=0x00000088
@3334.200938ms:Read  Buf(0x50000100)=0x00000000
@3334.360375ms:Read  Buf(0x50000004)=0x00000061
@3334.400438ms:Write BD (0x50000004)=0x00000061
@3334.429938ms:Read  Buf(0x50000004)=0x00000000
@3334.471562ms:Write BD (0x50000008)=0x00000001	; Reset CPU

Lots of SWD read errors here since SWD controller resets as well (140ms)

@3334.550750ms: SWD Reset occured.
@3334.602500ms: SWD Reset occured.