MT8920BE Datasheet PDF - Mitel

●Description

●The ST-BUS Parallel Access Circuit (STPA) provides a simple interface between Mitel’s ST-BUS and

●parallel system environments.

●Features

●• High speed parallel access to the serial ST-BUS

●• Parallel bus optimized for 68000µP (mode 1)

●• Fast dual-port RAM access (mode 2) Access time: 120 nsec

●• Parallel bus controller (mode 3) - no external controller required

●• Flexible interrupt capabilities - two independent/programmable interrupt sources with auto-vectoring

●• Selectable 24 and 32 channel operation

●• Programmable loop-around modes

●• Low power CMOS technology

●Applications

●• Parallel control/data access to T1/CEPT digital trunk interfaces

●• Digital signal processor interface to ST-BUS

●• Computer to Digital PABX link

●• Voice store and forward systems

●• Interprocessor communications