Dear SEGGER experts,
Recently, I tried to use Jlink with SWD interface to connect Cortex-R8 and Cortex-M0, and I found out that there is a problem when I disconnect both cpu.
If I Connect R8 first and connect M0 second, I'll need to disconnect M0 first and R8 second. If disconnect R8 first and M0 second it will show up error message both on IAR and Jlink like the following picture.
![](https://forum.segger.com/index.php/Attachment/5642-Jlink-error-message-png/?s=81cb7f1e9bb9c4e135a246f7230ad3b5e8358c3c)
If I Connect M0 first and connect R8 second, same error will happen if I disconnect M0 first.
It's seems that the first cpu I need to disconnect is the last one I connect.
Is there any step I may doing wrong? These problem won't happen if I use Jlink with JTAG interface.
Any help is greatly appreciated.
Recently, I tried to use Jlink with SWD interface to connect Cortex-R8 and Cortex-M0, and I found out that there is a problem when I disconnect both cpu.
If I Connect R8 first and connect M0 second, I'll need to disconnect M0 first and R8 second. If disconnect R8 first and M0 second it will show up error message both on IAR and Jlink like the following picture.
If I Connect M0 first and connect R8 second, same error will happen if I disconnect M0 first.
It's seems that the first cpu I need to disconnect is the last one I connect.
Is there any step I may doing wrong? These problem won't happen if I use Jlink with JTAG interface.
Any help is greatly appreciated.