Quote Originally Posted by dbachman View Post
The datasheet of the MT8888 DTMF transceiver says to read the status register and if bit one is set, do the next step. The datasheet says to send b7, b6 and b5 as %110. Do I make portb = %11000000? On the next statement do I say "If portb.1 = 1 then next step"? I'm kind of stuck and any enlightenment would sure help.
Not seeing any reference to b7,b6,b5 in the datasheet (MT8888C from Mitel/Zarlink) or a couple of other datasheets.
Which datasheet are you using?