MC68302CEH16C

The MC68302CEH16C is a highly integrated single-chip microprocessor built around the MC68000 core with a dedicated communications processor (RISC CPM) and on-chip system integration. With a 16 MHz core clock, 5 V I/O and industrial temperature qualification, it is designed for embedded networking and communications applications that require multi-protocol serial interfaces and on-chip peripheral integration.

Typical use cases include ISDN and telecom equipment, data concentrators, line cards, modems and network bridges or gateways where consolidated functionality, deterministic serial communications and industrial operating range are required.

Key Features

• MC68000 Core Single MC68000/MC68008-compatible core operating at 16 MHz, supporting 8/16-bit bus width for legacy and embedded control tasks.
• Communications Processor (RISC CPM) Separate RISC communications processor to offload protocol handling and improve concurrent multi-channel communications performance.
• Multi-Protocol Serial Controllers Three Serial Communications Controllers (SCCs) supporting HDLC/SDLC, Bisync, UART, DDCMP, Totally Transparent and V.110 protocols; plus two Serial Management Controllers (SMCs) for IDL and GCI channels.
• Serial DMA and Buffering Six serial DMA channels and the ability to handle multiple buffers/frames without M68000 intervention, reducing CPU overhead for data movement.
• On-Chip Memory and DMA 1,152 bytes of dual-port RAM and an Independent Direct Memory Access (IDMA) controller for efficient data exchange between processors and peripherals.
• System Integration & I/O Parallel I/O ports (some with interrupt capability), four programmable chip-select lines with wait-state logic, programmable address mapping and an on-chip clock generator with output clock.
• Timers and Watchdog Three timers plus a software watchdog timer and hardware watchdog for monitoring bus activity and system health.
• Memory Controller Integrated DRAM refresh controller and DRAM interface support for external memory requirements.
• Physical Interfaces Flexible physical interface support for Inter-chip Digital Link (IDL), General Circuit Interface (GCI), Pulse Code Modulation (PCM), Non-multiplexed Serial Interface (NMSI) and a Serial Communication Port (SCP).
• Package & Mounting 132-pin PQFP surface-mount package (46×46 mm) with bumpered BQFP option noted; designed for PCB-mounted embedded systems.
• Electrical & Environmental 5 V I/O voltage and industrial operating temperature range of -40 °C to 85 °C. RoHS compliant.

Typical Applications

• ISDN Equipment — Supports ISDN basic rate and terminal adapter applications with multi-protocol serial controllers and GCI/IDL interfaces.
• Data Concentrators — On-chip DMA, dual-port RAM and multiple serial channels enable efficient concentration and forwarding of serial data streams.
• Modems and Line Cards — Integrated communications processor and protocol support simplify modem control and line card designs.
• Network Bridges and Gateways — Multi-channel serial connectivity and protocol flexibility support bridging and gateway functions in communications networks.
• Telecom Peripheral Modules — Timers, watchdogs, DRAM refresh and programmable chip-selects support robust embedded peripheral implementations.

Unique Advantages

• Highly integrated single-chip design: Combines MC68000 core, system integration block and communications processor to reduce BOM and board-level complexity.
• Multi-protocol communications: Three SCCs, two SMCs and support for common serial protocols allow concurrent handling of diverse telecom and data protocols.
• Reduced CPU overhead: Six serial DMA channels and on-chip dual-port RAM enable buffer management and frame transfers without continuous M68000 intervention.
• Industrial temperature qualified: Rated from -40 °C to 85 °C for deployment in temperature-demanding embedded environments.
• Flexible interfacing: Support for IDL, GCI, PCM, NMSI and SCP physical interfaces provides adaptable connectivity options for telecom designs.
• Vendor and tool support: Product documentation, application notes and third-party tool support are available to accelerate development and integration.

Why Choose MC68302CEH16C?

The MC68302CEH16C positions itself as a compact, industrial-grade communications microprocessor that integrates a MC68000 core with a dedicated communications processor and extensive serial peripheral set. Its combination of on-chip DMA, dual-port RAM, multi-protocol SCC/SMC support and DRAM controller makes it suited for embedded networking and telecom modules that demand consolidated functionality and deterministic serial handling.

Designers and procurement teams targeting ISDN equipment, modems, line cards, data concentrators or network gateway modules will find the MC68302CEH16C valuable for reducing component count, simplifying board design and leveraging available documentation and third-party tool support. RoHS compliance and a broad operating temperature range support long-term deployment in industrial environments.

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