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I agree that there are internal LNAs and HPAs in the 43907 and 54907 chips and a port for an external antenna - in fact, I think the evb for the 54907 has ports/pads for 2 external antennas. for my application, I plan to use external hardware for the LNA and HPA functions. I would guess that one of the external antennas would be connected to the 2.4 GHz WLAN receiver input and 2.4 GHz WLAN PA output, and the other external antenna would be connected to the 5 GHz WLAN receiver input and 5 GHz WLAN output - can you verify?
for the 54907, the chip pin-out has provision for use of an external amplifier. pin (bump number) 235 (label is WRF_EXT_TSSIA) accepts a TSSI (transmit signal strength indicator) input. This is from the data sheet for the chip.
Is it possible to access this pin (bump) on the evb for the 54907? I don't need the external amplifiers to be on the evb - I just need to be able to feed them from the evb.