NXP Semiconductors MC68340CFE16E

Overview

MC68340CFE16E from Motorola (now NXP/Freescale) is a 32-bit integrated processor with CPU32 core, dual-channel DMA, two USARTs, and system integration module in a 144-pin CQFP package. It delivers 10,045 Dhrystones/sec @ 16.78 MHz, supports 32-bit addressing with 16-bit data bus, and targets embedded control systems requiring high integration and low component count.

For engineers reviewing the MC68340CFE16E datasheet, MC68340CFE16E pinout, MC68340CFE16E application, or MC68340CFE16E equivalent, this page provides verified functional identity, confirmed 16.78 MHz/5 V operation, validated CQFP-144 package mapping, exact peripheral register compatibility with MC68681/MC2681, and real-world CD-I and industrial controller use cases.

Technical Context

The MC68340CFE16E implements the CPU32 core-a 32-bit M68000-family processor with full object-code compatibility to MC68000/MC68010, 32×32 multiply, and background debug mode via dedicated serial interface. Its intermodule bus (IMB) synchronously connects CPU32, DMA, USARTs, and timers without external glue logic.

It integrates a System Integration Module (SIM40) providing external bus interface (32 address/16 data lines), programmable chip selects, IEEE 1149.1 boundary scan, power-on reset, and periodic interrupt timer-replacing discrete PAL/TTL logic. The dual-channel DMA supports single- or dual-address transfers at up to 33.3 MB/s memory-to-peripheral @ 16.78 MHz.

Key Specifications

Pinout & Package

MC68340CFE16E uses a 144-pin Ceramic Quad Flat Pack (CQFP) with gull-wing leads and 0.65 mm pitch. Pinout follows Motorola's standardized MC68340 signal assignment across all packages, with functional grouping per block diagram (CPU32 core, SIM40, DMA, USART, timers, IMB, and JTAG).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar integrated processor applications.

Compared with MC68340CFE16E, MC68332ACFUE16 sacrifices DMA bandwidth and serial flexibility for lower gate count and cost, while MC68360EM25C adds networking capability at the expense of higher power and larger footprint-neither is pin-compatible, and both require firmware adaptation for peripheral register differences.

Availability

MC68340CFE16E is available at Aetrix Electronics and suitable for industrial motion controllers, CD-I interactive players, telecom line cards, and medical diagnostic instruments requiring stable component supply across extended lifecycle programs.

Supply support for MC68340CFE16E includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Motorola Semiconductor (now part of NXP Semiconductors via Freescale acquisition) pioneered high-integration microcontrollers for industrial and multimedia applications in the 1990s.

The MC68340CFE16E belongs to the M68300 family-designed to replace multi-chip microprocessor systems with a single IC delivering CPU, DMA, serial, timer, and system integration functions for embedded control.

FAQ

What is the maximum operating frequency of the MC68340CFE16E?

The MC68340CFE16E is rated for 16.78 MHz operation at 5.0 V ±5%. This frequency is validated for the CQFP-144 package and industrial temperature range (0°C to +70°C). Higher speeds (e.g., 25.16 MHz) apply only to the MC68340CVR25E and other RP/PGA variants-not the FE-suffixed CQFP parts.

Is the MC68340CFE16E pin-compatible with the MC68340CVR25E?

No, the MC68340CFE16E is not pin-compatible with the MC68340CVR25E. The former uses a 144-pin Ceramic Quad Flat Pack (CQFP), while the latter uses a 145-pin Plastic Pin Grid Array (PGA). Physical layout, pin count, and signal mapping differ-requiring distinct PCB footprints and layout revisions.

Does the MC68340CFE16E support 3.3 V operation?

No, the MC68340CFE16E operates exclusively at 5.0 V ±5%. The "V" suffix (e.g., MC68340V) denotes the 3.3 V variant. This part's "FE" package code and absence of "V" in the full part number confirm its 5 V specification-using it with 3.3 V will result in functional failure.

What development tools are supported for the MC68340CFE16E?

The MC68340CFE16E supports Motorola's Background Debug Mode (BDM) interface, enabling real-time register inspection, memory read/write, and patch execution via dedicated serial link. Compatible tools include the M68340 Evaluation System (BR573/D) and third-party BDM emulators targeting CPU32 architecture-no JTAG debugger is required.

How does the MC68340CFE16E handle power management in embedded systems?

The MC68340CFE16E implements multiple power-saving mechanisms: LPSTOP instruction halts CPU/peripherals to ~300 µW standby current; software-controlled clock throttling scales frequency from 131 kHz to 16.78 MHz; and individual peripheral modules (e.g., unused USART) can be disabled to reduce consumption by 5–10% each-critical for battery-powered CD-I portables and remote sensors.