Who can give me some sugestion about the sdio client controller?

Hi all,

I prepare to design a RF reader/write with SDIO interface to connect t the portable equipment such as PDA.My hardware system is based on MCS5 family MCU.I try to find a sdio client interface ic for my system.It ca transimt data/command between the PDA and my MCU.I find some IP CORES,bu I failed to find some silicon chip.

Any ideas would be appreciated.

Thanks in advance, ljmpbaby