We need some help , how interface CC2530 32.768Khz clock input with an TCXO Clock Osc. output.

We would like to have better accuracy in our CC2530 design and we are looking how to interface the oscillator output of our RTC NXP PCF2129A ,

see attached datasheet  http://www.nxp.com/documents/data_sheet/PCF2129A.pdf

We have some doubts because CC2530 datasheet does not specify which is the “Osc. Input”.

Thank you for your Help,

Ricard