T7121 Datasheet | Agere Systems

.. Data Sheet April 1997 T7121 HDLC Interface for ISDN (HIFI-64) Features s Description Low-cost device for B-channel (64 kbits/s) or D-channel (16 kbits/s) data transport. s s s s s s s s The T7121 HDLC Interface for ISDN (HIFI-64) connects serial munications links carrying HDLC bitsynchronous data frames to 8-bit microputer sysOptional transparent mode- no HDLC framing is tems. There is an optional transparent mode of operperformed. ation in which no HDLC processing is performed on Frame sync (FS) allows a slot-select feature to user data. The device municates with the system microprocessor as a memory-mapped peripheral and access an individual time...