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AWR2243: Firmware download through SPI fail

Part Number: AWR2243

Hello, 

I am testing our two chip cascading solution with AWR2243 board. 

Now I try to download the firmware to master AWR2243 through SPI interface, as 

long as the host send the first trunk to device, the asyn signal "MSS CPU Fault " is received:

However, the device can be powered on successfully as shown in the red line.

BTW, I do changed firmware type to 0 as shown it the following:

/* Firmware File Type */
#define MMWL_FILETYPE_META_IMG (0)

Any ideas?

Best

Tim