MC68302EH20CR2

The MC68302EH20CR2 is a one-chip microprocessor solution featuring an MC68000/MC68008 microprocessor core tightly integrated with a dedicated communications processor (RISC CPM). Designed for networking and communications equipment, the device provides multi-protocol serial controllers, DMA, on-chip shared memory and system integration blocks in a single 132‑pin PQFP surface-mount package.

With a 20 MHz core speed, 5 V I/O and a commercial operating range of 0 °C to 70 °C, this part targets applications that require consolidated control and multi-channel communications capability in a compact package.

Key Features

• Core & Architecture  MC68000/MC68008 microprocessor core combined with a separate RISC communications processor (CP) to handle communications tasks.
• Communications Subsystem  Three full‑duplex Serial Communications Controllers (SCCs) plus two Serial Management Controllers (SMCs) supporting HDLC/SDLC, Bisync, UART, DDCMP and totally transparent protocols.
• DMA & Buffering  Independent Direct Memory Access (IDMA) controller with six serial DMA channels and the ability to send/receive up to eight buffers/frames without M68000 core intervention.
• On‑Chip Memory & Controllers  1152‑byte dual‑port RAM plus a DRAM refresh/controller and four programmable chip‑select lines with wait‑state logic for flexible memory mapping.
• System Control & Timers  Interrupt controller with two modes, three timers including a software watchdog timer, hardware watchdog for bus activity, clock generator and bus arbitration logic.
• Interfaces & Physical Links  Flexible physical interface for IDL (Inter‑chip Digital Link), GCI (General Circuit Interface), PCM and NMSI; also includes a Serial Communication Port (SCP) for synchronous communication.
• Package & Mounting  132‑pin PQFP (46 × 46 mm) bumpered package, surface‑mount mounting.
• Electrical & Environmental  20 MHz speed, 5 V I/O supply and RoHS compliant; operating temperature 0 °C to 70 °C.

Typical Applications

• ISDN Equipment  Supports ISDN basic rate and terminal adapter interfaces through the configurable communications architecture and protocol support.
• Data Concentrators  On‑chip DMA, multiple serial controllers and dual‑port RAM enable aggregation and buffering of multiple serial channels.
• Modems and Line Cards  Integrated communications processor and serial protocol support provide the building blocks for modem and line card designs.
• Network Bridges and Gateways  Multi‑protocol SCCs and flexible interface options allow implementation of bridging and gateway functions in a single device.

Unique Advantages

• Integrated MCU and Communications Processor: Combines the MC68000/MC68008 core with a dedicated RISC CPM to separate application control from communications processing as described in the datasheet.
• Multi‑protocol Serial Support: Three SCCs and two SMCs provide direct support for HDLC/SDLC, Bisync, UART, DDCMP and transparent modes for flexible protocol implementation.
• On‑chip DMA and Dual‑Port RAM: Independent DMA channels and 1152‑byte dual‑port RAM support efficient buffer handling and up to eight buffers/frames transfer without M68000 intervention.
• System Integration Features: Includes interrupt controller, timers, watchdogs, programmable chip‑selects and DRAM refresh/controller to streamline system design.
• Flexible Physical Interfaces: SCCs can access IDL, GCI, PCM and NMSI physical interfaces, enabling connectivity across a range of telecommunication link types.
• RoHS Compliant Commercial‑Grade Option: RoHS compliant device supplied in a 132‑PQFP surface‑mount package with a 0 °C to 70 °C operating range.

Why Choose MC68302EH20CR2?

The MC68302EH20CR2 offers a compact, highly integrated approach for embedded communications and networking designs by combining a standard MC68000/MC68008 core with a dedicated communications processor and a comprehensive set of peripherals. Its multi‑protocol serial controllers, DMA capabilities and on‑chip shared memory make it well suited for applications that require consolidated control and multi‑channel data handling.

This part is appropriate for engineers and teams designing ISDN equipment, data concentrators, modems, line cards, bridges and gateways who need documented protocol support, flexible interface options and a surface‑mount 132‑pin PQFP package in a commercial temperature range.

Request a quote or submit an inquiry to order the MC68302EH20CR2 and evaluate its integration and communications capabilities for your next embedded networking design.