Silicon Motion Announces Results for the Period Ended December 31, 2009

TAIPEI, Taiwan — Silicon Motion Technology Corporation (Nasdaq:SIMO) (the “Company”) today announced its fourth quarter and full year 2009 financial results.

Net sales of mobile communication products, which include primarily mobile TV IC solutions and CDMA RF ICs, decreased 41% from the third quarter of 2009 to US$3.6 million in the fourth quarter.

Business Highlights

• Secured a second design win for the Brazilian ISDB-T mobile TV market as well another design-win for the Japan domestic ISDB-T mobile TV market
• Began shipping our CMMB mobile TV solution for the China market with LG and Lenovo handsets

During the fourth quarter, our mobile communications business decreased due to the impact of continued product transitions in the Korea domestic market. We will be rolling out a more advanced T-DMB mobile TV SoC in mid-2010. We are excited by our increasing pipeline of mobile TV design wins in new mobile TV markets and are delighted to announce that new LG and Lenovo TD-SCDMA handsets in China are using our CMMB mobile TV solutions. For the Brazil market, in addition to our first ISDB-T mobile TV solution that we started shipping in the third quarter with a Samsung handset, we have received another important ISBD-T design win. We have also received another ISDB-T design win for the Japan market.”