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AFE7950: TDD mode question

JB Woo
Prodigy 60 points
Part Number: AFE7950

Hello.

Does TDD mode (using TXEN1, RXEN1) work in Tx test Pattern mode or jesd internal loop back mode?.

I set the TDD mode in LATTE as follows. Are there any more settings needed?

    sysParams.modeTdd = 0

    sysParams.RRFMode = 5

    sysParams.jesdSystemMode =[3,3]

    sysParams.gpioMapping['H15'] = ['TXATDD']  

    sysParams.gpioMapping['E7'] = ['RXATDD']  

  • 0
    TI__Genius 10865 points

    Hello JB Woo,

    If TDD input is high, for a receive or transmit channel, that channel will be active. If it's low, that channel will go to standby mode. This functionality works in Tx test pattern mode and JESD internal loopback mode as well.

    The settings you noted above are enough to set up the TDD pins. Note that you are only controlling only TXA and RXA channels using the GPIOs. If you want to control other channels as well with same pins, it should be updated as below:

    sysParams.gpioMapping['H15']=['TXATDD', 'TXBTDD', 'TXCTDD', 'TXDTDD']

    sysParams.gpioMapping['E7'] = ['RXATDD', 'RXBTDD', 'RXCTDD', 'RXDTDD'] 

    Regards,

    Vijay