Radio schematic

[cuspaceflight]

Radio schematic

[adamgreig]

1. I don't believe those are the same radio modules - they are RFM12Bs and you have ALPHA-TRX433S. So it's probably not useful to look at how they connected them.
   From the datasheet from your radio it looks like it should be possible to just use the SPI bus to send and receive data as well as configuration, but this might be trickier to set up (you have to enable and write to the relevant buffers). Additionally you'll probably want at least pin 4 connected to a GPIO so you can respond to the internal buffer becoming full. It's not clear if you also need to drive pin 3 to "select" the FIFO (the datasheet is not clear on the matter).

2. The microcontroller has built-in pullup and pulldown resistors on every pin that you can turn on programmactically, so the resistors are only required if it's essential that those signals are defined before the microcontroller can initialise. In this case it should be fine to use the builtin pullups.

[boyuanxiao]

Thanks for your reply. I've changed the schematic based on an example from RF solutions http://goo.gl/g2blzq, they have pin 4 connected to a IO pin as you've suggested, pin 3 (presumably FIFO select) is pulled up as is reset (pin 6) and the clock output (pin 5).