User`s manual

Am186™CC Microcontroller Router Reference Design User’s Manual
2-21
In the ISDN U configuration, the Am186CC microcontroller uses the SSI and INT2
as an edge-triggered, active Low interrupt to configure the T7237A device though
its serial microprocessor interface. The T7237A 2B+D channel communication is
performed across the T7237A TDM bus, which is directly connected to Am186CC
microcontroller HDLC Channel A, configured in PCM mode. The T7237A device
provides a 2.048-MHz clock and frame sync to transfer data between the TDM
and the Am186CC microcontroller PCM interface, and the Am79C031 codec PCM
bus for the POTS interface.
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