The Azalia mobile daughter card (MDC) specification provides a mobile formfactor modules and interface for audio or modem or audio/modem codec solutions . The MDC specification is open to the industry to facilitate IHV validation on Azalia based codec designs. There are 2 system interface connector for the MDC. They are the MDC 1.0 and MDC 1.5. The MDC 1.0 can apply to audio, modem, or audio and modem codec solutions and the MDC 1.5 applies to modem or audio codec solutions only. The MDC 1.0 and MDC 1.5 comes in a 30 circuits and 12 circuits configuration respectively.