TRF7970A: TRF7970A internal regulators

you click the rich formatting button

then click insert media, browse, choose your file, then insert.

understood - so you don't use VDD_X at all here -

here is what i see - and the schematic could be redrawn a bit to make it easier to read, but its yours - so your call :)

MOD pin is pulled high to 3.3VDC, should be pulled low through 1k and the pin connected to MCU if you in fact want to use DM0 at some point.

ASK/OOK pin also is recommended to have 1k pulldown as well - might work with 10k but if memory serves, that should be a harder pull down

the resistors on the SPI lines are not necessary - R74, R75, R76, R79 and the R71 on the MOD pin - not sure why you put those in

Vin requires bulk and high speed bypass caps - in fact, there should be five pairs of these in your design (on VDD_X, BG, VDD_PA/VDD_RF, VDD_A and VIN)

i see you have most of that covered, but nothing shown for Vin and only 1uF on VDD_X

your drawing of the lines out - particularly the handling of I/O_3 and 5 is not clear. normally those are left open for SPI w/SS and you could use VDD_X to keep the I/O rails correct simply.

i cannot see the entire matching network - please check with what i attached here below.  

attached is the reference schematic and layout for SPI w/SS

TRF79x0ATB_SCH_C.pdf

TRF7970ATB_PCB_D.pdf

additionally, since you are using split rail (which can be done) - here is a good app note about that