MC68302EH16C

The MC68302EH16C is a versatile one‑chip microprocessor integrating an MC68000 microprocessor core with a dedicated communications processor and system integration block. Built for embedded networking and communications designs, the device combines a 16 MHz MC68000 core (8/16‑bit operation), a flexible RISC communications subsystem and a broad set of on‑chip peripherals to simplify multi‑protocol applications.

Targeted at ISDN, modem, line card and gateway applications, the MC68302EH16C delivers on‑chip communications controllers, DMA, dual‑port RAM and system control features in a 132‑pin PQFP (46×46) surface‑mount package, operating at 5 V I/O and rated for 0 °C to 70 °C.

Key Features

• Core MC68000/MC68008 microprocessor core; single core with 8/16‑bit data bus operation running at 16 MHz and 5 V I/O.
• Communications Processor (CP) Separate RISC communications engine for handling multi‑channel communications tasks and offloading protocol processing from the main core.
• Serial Controllers & Protocol Support Three Serial Communications Controllers (SCCs) and two Serial Management Controllers (SMCs) with protocol support for HDLC/SDLC, Bisync, UART, DDCMP, Totally Transparent protocols and V.110.
• DMA and On‑Chip RAM Independent Direct Memory Access (IDMA) controller, six serial DMA channels dedicated to the SCCs, and 1,152‑byte on‑chip dual‑port RAM to support buffer management and low‑latency transfers.
• Memory & Bus Support DRAM refresh controller, four programmable chip‑select lines with wait‑state logic, and programmable address mapping for dual‑port RAM and IMP registers.
• System Control & Reliability Interrupt controller with multiple modes, three timers (including a software watchdog timer), hardware watchdog monitoring bus activity, freeze control for debugging, and ability to disable the M68000 core.
• Timing & I/O On‑chip clock generator with output clock signal and multiple parallel I/O ports, some with interrupt capability.
• Interfaces Flexible physical interface options accessible by SCCs including Inter‑chip Digital Link (IDL), General Circuit Interface (GCI), Pulse Code Modulation (PCM) and Non‑multiplexed Serial Interface (NMSI).
• Package & Environmental 132‑PQFP (46×46) bumpered package, surface‑mount mounting, RoHS compliant, operating temperature range 0 °C to 70 °C.
• Development Support Strong third‑party tools support and vendor documentation including user manuals, application notes and sample code to accelerate development.

Typical Applications

• ISDN Equipment Configurable communications interfaces and protocol support make the device suitable for ISDN basic rate and terminal adapter applications.
• Data Concentrators On‑chip DMA, dual‑port RAM and multiple serial controllers enable efficient aggregation and transfer of data streams.
• Modems and Line Cards Integrated communications engine and protocol handling support modem and line card functions with reduced external logic.
• Network Bridges and Gateways Multi‑channel serial communications and programmable interface mapping support bridging and gateway tasks across diverse link types.

Unique Advantages

• Highly integrated one‑chip solution: Combines an MC68000 core, system integration block and communications processor to reduce board‑level complexity and external component count.
• Offloaded communications processing: Dedicated RISC CP and multiple SCCs allow protocol work to be performed without constant M68000 core intervention, improving application determinism.
• Robust DMA and buffering: Independent IDMA, six serial DMA channels and on‑chip dual‑port RAM support multi‑buffer transfers (up to eight buffers/frames) for sustained data throughput.
• Flexible interface support: SCCs and SMCs provide a range of physical and protocol interfaces (GCI, IDL, PCM, NMSI and more) for interoperable designs.
• System control and safety features: Hardware watchdog, freeze control, disable‑CPU option and programmable chip‑selects deliver controllable reliability and debug capability.
• Production‑ready packaging and compliance: Delivered in a 132‑PQFP (46×46) surface‑mount package and marked RoHS compliant for modern manufacturing processes.

Why Choose MC68302EH16C?

The MC68302EH16C positions itself as a compact, integrated processor for embedded communications and networking products where on‑chip protocol handling, DMA buffering and flexible serial interfaces are required. With an MC68000 core, a dedicated communications processor and comprehensive system control features, it supports multi‑protocol designs while minimizing external components.

This device is well suited to engineers building ISDN equipment, modems, data concentrators, line cards, bridges and gateways who require a proven combination of integration, documented design resources and third‑party tool support. Its package, operating range and RoHS compliance make it practical for production deployments in commercial embedded applications.

Request a quote or submit an inquiry to get pricing and availability for the MC68302EH16C and discuss how it can fit your embedded communications design.