voduychau
Newbie level 3
mt8880 project schematic
exactly,it's can't show the signal when received a valid dtmf tone!
i have been already make the circuits folow datasheet instruction,some funtion available,but "bit 2" not show logic 1 when received a valid dtmf tone,what can i do???
has another way to know a valid received DTMF tone without the "bit 2" ????
note:i receive the DTMF tone from telephone station by a transformer 1:1,600ohm
sorry,my English is not good!
Added after 58 minutes:
any body help me?
only 1 month remaning for my project!
exactly,it's can't show the signal when received a valid dtmf tone!
i have been already make the circuits folow datasheet instruction,some funtion available,but "bit 2" not show logic 1 when received a valid dtmf tone,what can i do???
has another way to know a valid received DTMF tone without the "bit 2" ????
note:i receive the DTMF tone from telephone station by a transformer 1:1,600ohm
sorry,my English is not good!
Added after 58 minutes:
any body help me?
only 1 month remaning for my project!