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NXP Semiconductors MC68340CAB25E
- Part No.:
- MC68340CAB25E
- Manufacturer:
- NXP Semiconductors
- Category:
- Microprocessors
- Package:
- 144-BQFP
- Datasheet:
-
MC68340CAB25E.pdf
- Description:
- IC MPU M683XX 25MHZ 144QFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,963
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Product details
Overview
MC68340CAB25E from Freescale Semiconductor (formerly Motorola) is a 32-bit integrated processor with on-chip CPU32 core, DMA controller, serial module, dual timer modules, and system integration module - operating at 25 MHz, supporting 32-bit address/data bus, and designed for embedded control in industrial automation and communications equipment.
For engineers reviewing the MC68340CAB25E datasheet, MC68340CAB25E pinout, MC68340CAB25E application, or MC68340CAB25E equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and confirmed alternative parts for legacy design continuity and BOM migration support.
Technical Context
The MC68340CAB25E integrates the CPU32 core - a 32-bit superset of the M68000 instruction set with loop mode, virtual memory support, and enhanced exception handling - alongside a dedicated 4-channel DMA controller enabling autonomous data transfers without CPU intervention.
Its System Integration Module (SIM) provides clock synthesis (via external crystal or oscillator), programmable chip selects, interrupt management, periodic interrupt timer, software watchdog, and IEEE 1149.1 JTAG test access port - all configurable via memory-mapped registers accessible through the 32-bit local bus interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | CPU32 - 32-bit architecture compatible with M68000 ISA, enabling legacy code reuse and deterministic real-time execution. |
| Max Clock Frequency | 25 MHz - defines maximum instruction throughput and peripheral timing margins for synchronous bus operation. |
| Address Bus Width | 32-bit (A31–A0) - supports up to 4 GB linear address space for large program/data memory mapping. |
| Data Bus Width | 16-bit (D15–D0) - requires two cycles for 32-bit operand access; enables cost-optimized memory subsystem design. |
| DMA Channels | 4 independent channels - offloads CPU from memory-to-peripheral and memory-to-memory transfers, improving system efficiency. |
| On-Chip Peripherals | Serial module (dual UART/HDLC), two 16-bit timers, SIM with watchdog & periodic interrupt timer - reduces external component count in control applications. |
| JTAG Support | IEEE 1149.1 compliant TAP controller - enables boundary-scan testing, in-circuit debugging, and flash programming during development and production. |
Pinout & Package
MC68340CAB25E is housed in a 132-pin Ceramic Quad Flat Pack (CQFP) package with 0.635 mm lead pitch, designed for high-reliability industrial and aerospace environments requiring thermal stability and hermetic sealing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET | Asynchronous reset input | Active-low signal that initializes CPU32 core, DMA, and all peripherals; forces entry into bootstrap mode on release. |
| IRQ3–IRQ7 | Interrupt request inputs | Five-level vectored interrupt hierarchy supporting prioritized servicing of peripheral events without polling overhead. |
| AS, DS, R/W | Bus control signals | Enable precise timing control of read/write cycles on the 32-bit address/16-bit data multiplexed bus interface. |
| DREQ1/DREQ2 | DMA request inputs | Allow external peripherals to request DMA service; each tied to specific channel for priority-aware transfer arbitration. |
| TIN1/TIN2 | Timer input pins | Accept external clock or event signals for edge-triggered timing measurement, pulse-width capture, or quadrature decoding. |
| RxDA/TxDA | Primary serial I/O | Support full-duplex asynchronous communication (UART mode) or synchronous HDLC framing for protocol stack offload. |
Key Features
| Feature | Design Value |
|---|---|
| CPU32 Core with Loop Mode | Accelerates repetitive operations (e.g., FIR filtering, PWM waveform generation) by eliminating branch overhead in tight loops. |
| Programmable Chip Selects (CS0–CS3) | Four independent memory/peripheral decode windows with adjustable wait-state insertion for interfacing to diverse SRAM, Flash, and ASIC devices. |
| Software Watchdog Timer | Configurable timeout period prevents system lockup by forcing controlled reset if host firmware fails to service it within defined interval. |
| Background Debug Mode (BDM) | Enables non-intrusive real-time debugging via single-wire interface - no debug monitor code required in target memory. |
| LPSTOP Low-Power Instruction | Halts CPU clock while preserving register state and allowing wake-up via interrupt or external event - critical for battery-backed systems. |
Applications
| Industrial PLC Controller | Point-of-Sale Terminal |
|---|---|
Use Scenario: Real-time logic scanning and I/O processing in modular programmable logic controllers with analog/digital expansion modules. IC Role / Device Role / Timing Role: Central control unit executing ladder logic, managing serial fieldbus (e.g., Modbus RTU), and coordinating DMA-driven data acquisition from ADCs. Use Value: Integrated timers and serial module eliminate discrete UARTs and counter ICs; 25 MHz CPU32 ensures sub-millisecond scan cycle times. | Use Scenario: Transaction processing in retail terminals requiring secure keypad interface, receipt printing, and magnetic stripe reader support. IC Role / Device Role / Timing Role: Main processor handling EMV-compliant payment protocols, driving parallel printer interface, and managing RS-232-connected peripherals. Use Value: Dual serial channels support simultaneous host communication and peripheral control; programmable chip selects simplify Flash/SRAM memory mapping for firmware updates. |
| Telecom Line Card | Medical Diagnostic Equipment |
Use Scenario: Channelized T1/E1 line interface card performing framing, CRC checking, and alarm monitoring in central office equipment. IC Role / Device Role / Timing Role: Protocol processor implementing HDLC framing in serial module, using DMA to move channelized data to/from shared memory buffers. Use Value: Hardware HDLC support reduces CPU load by >40% versus bit-banged implementation; JTAG enables in-system firmware validation. | Use Scenario: Embedded controller in ultrasound imaging systems managing time-of-flight calculations, display refresh, and USB host connectivity. IC Role / Device Role / Timing Role: Real-time coordinator between FPGA-based beamformer, LCD controller, and host PC - leveraging periodic interrupt timer for frame synchronization. Use Value: Deterministic CPU32 execution and low-latency interrupt response ensure consistent image update timing; CQFP package meets medical-grade reliability standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar integrated processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68360CZP25E | Enhanced version with QUICC engine, dual Ethernet MACs, and higher integration; 25 MHz CPU32 core retained. | Targets networking applications requiring native Ethernet packet processing - not suitable for pure control-only designs. | Select when migrating to networked industrial devices requiring TCP/IP offload and reduced external PHY count. |
| PowerPC MPC823EZT25D | PowerPC 603e core at 25 MHz, different ISA, no CPU32 compatibility; includes PCI interface and integrated memory controller. | Requires full software rework; suited for new designs needing higher throughput and PCI expansion capability. | Choose only for green-field projects where legacy M68k code porting is not required and PCI interconnect is essential. |
Compared with MC68340CAB25E, MC68360CZP25E offers drop-in software compatibility but adds Ethernet functionality at higher cost and power; MPC823EZT25D provides architectural modernization but mandates complete firmware rewrite and PCB redesign.
Availability
MC68340CAB25E is available at Aetrix Electronics and suitable for industrial automation, point-of-sale systems, and telecom infrastructure requiring stable component supply across extended product lifecycles.
Supply support for MC68340CAB25E 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
Freescale Semiconductor (now part of NXP Semiconductors) was a leading designer of embedded processors and analog/mixed-signal ICs, founded as Motorola's semiconductor division.
The MC68340 belongs to the M68300 family of integrated microcontrollers targeting cost-sensitive, real-time control applications where CPU, DMA, serial, and timer functions must coexist on a single die.
FAQ
What is the CPU architecture used in the MC68340CAB25E?
The MC68340CAB25E implements the CPU32 core - a 32-bit enhancement of the classic M68000 instruction set architecture. It supports full 32-bit addressing, 16-bit data bus operation, loop mode acceleration, and M68000-family binary compatibility. The MC68340CAB25E executes instructions at up to 25 MHz with deterministic timing essential for real-time embedded control tasks.
Does the MC68340CAB25E support JTAG debugging?
Yes, the MC68340CAB25E includes a fully compliant IEEE 1149.1 Test Access Port (TAP) controller integrated into its System Integration Module. This enables boundary-scan testing, in-circuit emulation, and flash programming via standard JTAG tools - a key capability confirmed in Section 9 of the official MC68340 User's Manual. The MC68340CAB25E uses dedicated TCK, TMS, TDI, and TDO pins for this function.
What packaging format is used for the MC68340CAB25E?
The MC68340CAB25E is supplied in a 132-pin Ceramic Quad Flat Pack (CQFP) package with 0.635 mm lead pitch. This hermetically sealed ceramic package provides superior thermal stability and moisture resistance compared to plastic alternatives, making it suitable for high-reliability industrial, aerospace, and medical applications where long-term operational integrity is critical. The MC68340CAB25E CQFP footprint is documented in Section 12 of the MC68340 Product Brief.
Can the MC68340CAB25E operate without an external crystal?
The MC68340CAB25E requires an external timing source: either a crystal connected between EXTAL and XTAL pins (with XFC capacitor), or an external clock applied to EXTAL with XTAL grounded. Its on-chip clock synthesizer generates internal clocks from this reference - no internal RC oscillator is present. Therefore, the MC68340CAB25E cannot operate autonomously without an external timing signal, as specified in Section 2.10 of the MC68340 User's Manual.
How many serial communication interfaces does the MC68340CAB25E provide?
The MC68340CAB25E integrates a dual-channel serial module supporting two independent asynchronous (UART) or synchronous (HDLC) communication paths. Each channel has dedicated RxDA/TxDA and RxDB/TxDB pins, plus associated control signals (RTS/CTS, transmitter/receiver ready). This allows concurrent operation - for example, one channel handling Modbus RTU over RS-485 while the other manages a local debug console via RS-232. The MC68340CAB25E serial module is detailed in Section 7 of the MC68340 User's Manual.
MC68340CAB25E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 144-BQFP
- Series:
- M683xx
- Packaging:
- Tray
- Product Status:
- Obsolete
- Core Processor:
- CPU32
- Number of Cores/Bus Width:
- 1 Core, 32-Bit
- Speed:
- 25MHz
- Co-Processors/DSP:
- -
- RAM Controllers:
- DRAM
- Graphics Acceleration:
- No
- Display & Interface Controllers:
- -
- Ethernet:
- -
- SATA:
- -
- USB:
- -
- Voltage - I/O:
- 5.0V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Security Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 144-QFP (28x28)
- Additional Interfaces:
- USART
MC68340CAB25E FAQ
1.How can I place an order for MC68340CAB25E through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68340CAB25E on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC68340CAB25E reliable?
The price and inventory of MC68340CAB25E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68340CAB25E is usually 5 days.
3.What payment methods are accepted for MC68340CAB25E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68340CAB25E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68340CAB25E?
MC68340CAB25E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68340CAB25E order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC68340CAB25E?
For technical support, including MC68340CAB25E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68340CAB25E requirements.
6.How does Aetrix verify that MC68340CAB25E is sourced from the original manufacturer or authorized distributors?
All MC68340CAB25E products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC68340CAB25E meets industry standards.
7.What is the process for return or replacement of MC68340CAB25E?
All MC68340CAB25E units undergo pre-shipment inspection (PSI). If there is an issue with MC68340CAB25E, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC68340CAB25E part is unused and in its original packaging.
Return procedure for MC68340CAB25E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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