• Resolved

TSW38J84EVM: Setting PWD_TX_DIV = 0 on TRF3722 register 4 resets the DAC38J84

Prodigy 50 points

Replies: 5

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Part Number: TSW38J84EVM

When I set the PWR_TX_DIV to 0 (to enable the TX output) the board resets, requiring me to reconfigure the DAC, LMK and the TRF3722. I'm able to get the signal out of the DAC (measured on the current to voltage converter circuit), but when I enable the PWR_TX_OUT the signal out of J4 in 99% of times shows up for a moment and disappears the next. Reading back the register values seems to indicate that all the devices have been reset. 

I have narrowed down this event to when I change this bit to 0, but it may be that that is not the only way to trigger it. 

Is there anything I should be aware of when dealing with the setting up the TRF?