Hi
I am using a 2 Flasher ARM to program chips EFR32MG y EFR32BG. Every board have one of these targets (MG y BG). I´m using SWD with a Cortex 10-pin connector. I start programming one by one and i have not problems, but when I tried to do simultaneously it starts to appear some errors. After that errors I tried with different connections like use pull-up and pull-down in CLK and TMS pins (Pins 2,4) also in nReset Pin (10) but the errors still shows up.
I use J-Flash to program the targets and this is the errors it shows.

First error:

- Initialized successfully
- Target interface speed: 4000 kHz (Fixed)
- Connected successfully
Reading entire flash chip ...
- 130 sectors, 3 ranges, 0x0 - 0x3FFFF, 0xFE00000 - 0xFE007FF, 0xFE04000 - 0xFE047FF
- ERROR: PC of target system has unexpected value after checking target RAM. (PC = 0x1006E988 )!
---------------------------------------------------------------------- Registers -------------------------------------------------------------------------------------
PC = 1006E988
Current:R0 = 000000C3,R1 = 00000000,R2 = 00000004,R3 = 100A895F
R4 = 000000AE,R5 = 00000004,R6 = 04DE632C,R7 = 000000C3
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------


- ERROR: Failed to read back target memory
Disconnecting ...
- Disconnected


Second Error:

Connected successfully
Programming target (125461 bytes, 1 range) ...
- ERROR: RAM check failed @ address 0x20000000.
- ERROR: Write: 0x03020100 07060504
- ERROR: Read: 0xAAAAAAAA AAAAAAAA
- ERROR: (0 bytes of RAM have been checked successfully)
- ERROR: Failed to program target
Disconnecting ...
- Disconnected
------------


Anyone can help me?
Thanks!! :thumbsup:

Could you please explain your setup?
1) Flasher are used in PC-Mode, correct?
2) How are the Flashers connected to the PC?
3) Which version of J-Flash do you use?

1) Yes, I use it in PC-Mode.
2) I connected by USB
3) V5.12d

Maybe it could help if i explain the setup I use on J-Flash:I Use SWD at 4000kHz and select the device EFR32MG1PxxxF256/EFR32BG1PxxxF256 on the library devices.

So you have a lot of board, each one with one chip or each one with 2 chips?

Yes, every board have 2 chips so I need to program both at the same time.
Here´s the info about every one.

MG: http://www.silabs.com/products/wireless/mesh-networking/efr32-mighty-gecko/pages/efr32mg1p233f256gm48.aspx
BG: http://www.silabs.com/products/wireless/bluetooth/efr32-blue-gecko/pages/efr32bg1p232f256gm48.aspx




Thanks! :D