HAI FRIENDS

I AM DOING PROJECT IN SECURITY SYSTEM THROUGH TELEPHONE, FOR DIALING A NUMBER I HAVE INTERFACED 8880 DTMF IC WITH 8051 MICROCONTROLLER, I FOLLOWED ALL THE STEPS FOR INITIALIZATION OF 8880 IC, AND DIALED A DIGIT FROM MICROCONTROLLER, MY 8880 IS NOT RESPONDING, I DOUBT WHETHER DTMF IS INITIALIZED PROPERLY, I FIGHTED LOT. I HAVE DONE CIRCUIT CONNECTION GIVEN IN DATASHEET.

I AM WORKING IN BURST MODE. INTERRUPT IS NOT GENERATING

WHAT WILL BE THE PROBLEM?