Hi,
According to the "PN5190 antenna design guide" document, on point "6.1 Correct RX coupling" the way to tune the value of Rrx is to "4. Read H_ATT_VALUE, RX_CONTROL_STATUS register (0x28), bit 3…8" and change the resistor until its 40.
In the current datasheed Rev. 3.5 that register doesn't exist, the closest i could find was the RX_CTRL_STATUS and RXCTRL_HF_ATT_VAL. Is it the same register described in the antenna design guide?
EDIT: The HF_ATT_VAL and RXCTRL_STATUS names were also sued in the "PN5190 design-in recommendations" document.
Also I believe there is a typo in the design guide, H_ATT_VALUE may refer to HF_ATT_VALUE, or vice versa. I'm not sure.
On my test board, I'm getting 38 (dec) in that register. Should I aim for 40 exactly, or is 38 good enough?
