MT8920B Description
The ST-BUS Parallel Access Circuit (STPA) provides a simple interface between Mitel’s ST-BUS and parallel system environments. The ST-BUS timing clock used to establish bit cell boundaries for the serial bus. A low going pulse used to synchronize the STPA to the 2048 kbit/s ST-BUS stream.
MT8920B Key Features
- High speed parallel access to the serial ST-BUS Parallel bus optimized for 68000 µP (mode 1) Fast dual-port RAM access (
- no external controller required Flexible interrupt capabilities
- two independent/programmable interrupt sources with auto-vectoring Selectable 24 and 32 channel operation Programmable l