This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TX7332: opening the TR switch

Part Number: TX7332

If I have two TX7332 connected to an AFE, and I want to switch the one TX off (open the T/R switches), I would use the  TR_SW_DIS_xx
What power mode must I be in to disable the signal from going through the unused (with disabled TR_SW_DIS_xx) TX7332.
hopefully the TX7332 can be off (global power down).... but would that make no sense, as I have to set up that register (and I guess power is required to open the T/R switch) .
Possibly there is a sequence I must use, which can keep the unused TX7332 in low power which still opening the T/R switch (disabling the switch).
we are only using on-chip beamforming (so that you can reduce the scope of your reply)

We have 3 power modes (for pulse echo):
1) Global power down: is the T/R switch open, closed, or based on TR_SW_DIS_xx?
2) Default Power Mode
2) Dynamic power mode ?  : 
3) Transmit-less Power Mode ?

Then we have Pulser Power Down: PDN_PUL_n   then makes T/R switch active....what does this mean? That it is open. closed, or controllable depending on the power mode?

  • Hi Philippe,

    The state of the T/R switch is determined by the TR_SW_DIS register. The behavior of T/R switch has no dependence on power mode, be it default or dynamic. PDN_PUL_n and global power down mode retains the state of the T/R switch, which is determined by the TR_SW_DIS register. If the TR_SW_DIS is set to '1', then the T/R switch will be off and it will be on if the bit is set to '0'.

    Thanks and Regards