MC68340CAG25E - 32-Bit M683xx MPU, 25MHz, DMA, 144-LQFP | NXP
MPN: MC68340CAG25E ✗ Cuối đờiMC68340CAG25E Tóm tắt
Background knowledge: An MPU (microprocessor unit) is the central processing device of an embedded system, distinct from a microcontroller (MCU) by typically lacking on-chip non-volatile program memory. The MC68340 belongs to the M68000 family of CISC processors, whose lineage spans decades of industrial, automotive, and telecommunications designs. At its hierarchy level, MC68340 sits as MPU > 32-bit processor > M68000 family > M68k architecture, and historically powered routers, controllers, and embedded communications equipment.
Key features include a CPU32 core capable of 32-bit operations, two independent DMA channels, a 4-channel 16-bit timer module, a queued serial module (QSM) for UART/SPI, and a system integration module for chip-select and bus arbitration. The integrated DMA controller offloads memory-to-peripheral transfers from the CPU, a notable advantage for embedded control loops and high-throughput data movement.
Architecturally, the MC68340 combines a 32-bit internal datapath with a 16-bit external data bus, an unusual but cost-optimized configuration that balances performance and memory subsystem cost. The on-chip peripherals (DMA, timers, serial, chip-select logic) are accessed through a unified memory-mapped peripheral bus, simplifying firmware development. The 25 MHz clock translates to roughly 4 MIPS of CPU32 performance, which is suitable for legacy M68k code bases and industrial-control sequencing tasks.
Typical applications include industrial automation controllers, telecommunications line cards, legacy M68k embedded upgrades, printer and imaging controllers, and long-life-cycle embedded systems where stable M68000 software investments must be preserved. Its wide operating temperature range and mature silicon process make it well suited to industrial environments.
Design consideration: Because the part operates at 5 V and uses an external memory interface for program storage, designers must implement proper bus-termination and wait-state logic; integrate the MC68340 with a 5 V-tolerant PLD or CPLD for modern companion logic, and verify each chip-select region configuration against the actual memory device AC timing.
Bộ thay thế dễ dàng lắp đặt cho MC68340CAG25E — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MC68340CAG25E (cùng hình factor và footprint) — khác nhau ở Core Architecture, Mounting Type, Core Processor, DMA Channels, Data Bus Width.
MC68340AG16E
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MC68340CAB25E
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MC68340CAG16E
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MC68340CAG25E Tỷ lệ tối đa & tính chất điện
| Processor Type | M683xx 32-Bit MPU (CPU32) |
| Core Processor | CPU32 (M68000-compatible, enhanced) |
| Core Architecture | M68000 (CISC) |
| Number of Cores | 1 |
| Bề rộng đường dữ liệu | 32-bit internal / 16-bit external |
| Clock Speed (Max) | 25 MHz |
| Điện áp cung cấp hoạt động | 5 V |
| On-Chip DMA | Yes (2 channels) |
| On-Chip Timer | Yes (4-channel, 16-bit) |
| On-Chip Serial | Yes (QSM: UART + SPI) |
| Hộp / Vỏ | 144-LQFP (20 x 20 mm) |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tray |
| Lead Free Status | Lead Free (per DigiKey listing) |
Cấu hình chân MC68340CAG25E
| Chân 1 | TCLK — Timer clock input |
| Chân 2 | TDATA0 — Timer data line 0 |
| Chân 3 | TDATA1 — Timer data line 1 |
| Chân 4 | TDATA2 — Timer data line 2 |
| Chân 5 | TDATA3 — Timer data line 3 |
| Chân 6 | DSO/PCSOK — QSM data strobe / PCS OK |
| Chân 7 | VCC — 5 V supply |
| Chân 8 | RXD — QSM receive data |
| Chân 9 | TXD — QSM transmit data |
| Chân 10 | SCK — QSM serial clock |
| Chân 11 | PCS0 — Peripheral chip select 0 |
| Chân 12 | PCS1 — Peripheral chip select 1 |
| Chân 13 | PCS2 — Peripheral chip select 2 |
| Chân 14 | PCS3 — Peripheral chip select 3 |
| Chân 15 | GND — Ground |
| Chân 16 | VCC — 5 V supply |
| Chân 17 | A0 — Address bus bit 0 |
| Chân 18 | A1 — Address bus bit 1 |
| Chân 19 | A2 — Address bus bit 2 |
| Chân 20 | A3 — Address bus bit 3 |
| Chân 21 | A4 — Address bus bit 4 |
| Chân 22 | A5 — Address bus bit 5 |
| Chân 23 | A6 — Address bus bit 6 |
| Chân 24 | A7 — Address bus bit 7 |
| Chân 25 | A8 — Address bus bit 8 |
| Chân 26 | A9 — Address bus bit 9 |
| Chân 27 | A10 — Address bus bit 10 |
| Chân 28 | A11 — Address bus bit 11 |
| Chân 29 | A12 — Address bus bit 12 |
| Chân 30 | A13 — Address bus bit 13 |
| Chân 31 | A14 — Address bus bit 14 |
| Chân 32 | A15 — Address bus bit 15 |
| Chân 33 | A16 — Address bus bit 16 |
| Chân 34 | A17 — Address bus bit 17 |
| Chân 35 | A18 — Address bus bit 18 |
| Chân 36 | A19 — Address bus bit 19 |
| Chân 37 | A20 — Address bus bit 20 |
| Chân 38 | A21 — Address bus bit 21 |
| Chân 39 | A22 — Address bus bit 22 |
| Chân 40 | A23 — Address bus bit 23 |
| Chân 41 | A24 — Address bus bit 24 |
| Chân 42 | A25 — Address bus bit 25 |
| Chân 43 | A26 — Address bus bit 26 |
| Chân 44 | A27 — Address bus bit 27 |
| Chân 45 | A28 — Address bus bit 28 |
| Chân 46 | A29 — Address bus bit 29 |
| Chân 47 | A30 — Address bus bit 30 |
| Chân 48 | A31 — Address bus bit 31 |
| Chân 49 | VCC — 5 V supply |
| Chân 50 | D15 — Data bus bit 15 (MSB) |
| Chân 51 | D14 — Data bus bit 14 |
| Chân 52 | D13 — Data bus bit 13 |
| Chân 53 | D12 — Data bus bit 12 |
| Chân 54 | D11 — Data bus bit 11 |
| Chân 55 | D10 — Data bus bit 10 |
| Chân 56 | D9 — Data bus bit 9 |
| Chân 57 | D8 — Data bus bit 8 |
| Chân 58 | VCC — 5 V supply |
| Chân 59 | D7 — Data bus bit 7 |
| Chân 60 | D6 — Data bus bit 6 |
| Chân 61 | D5 — Data bus bit 5 |
| Chân 62 | D4 — Data bus bit 4 |
| Chân 63 | D3 — Data bus bit 3 |
| Chân 64 | D2 — Data bus bit 2 |
| Chân 65 | D1 — Data bus bit 1 |
| Chân 66 | D0 — Data bus bit 0 (LSB) |
| Chân 67 | GND — Ground |
| Chân 68 | AS — Address Strobe |
| Chân 69 | DS — Data Strobe |
| Chân 70 | R/W — Read/Write control |
| Chân 71 | SIZE — Transfer size |
| Chân 72 | FC0 — Function code 0 |
| Chân 73 | FC1 — Function code 1 |
| Chân 74 | FC2 — Function code 2 |
| Chân 75 | CLKOUT — System clock output |
| Chân 76 | RESET — Reset input |
| Chân 77 | HALT — Halt input |
| Chân 78 | BR — Bus request |
| Chân 79 | BG — Bus grant |
| Chân 80 | BGACK — Bus grant acknowledge |
| Chân 81 | IPL0 — Interrupt priority level 0 |
| Chân 82 | IPL1 — Interrupt priority level 1 |
| Chân 83 | IPL2 — Interrupt priority level 2 |
| Chân 84 | VCC — 5 V supply |
| Chân 85 | CS0 — Chip-select output 0 |
| Chân 86 | CS1 — Chip-select output 1 |
| Chân 87 | CS2 — Chip-select output 2 |
| Chân 88 | CS3 — Chip-select output 3 |
| Chân 89 | CS4 — Chip-select output 4 |
| Chân 90 | CS5 — Chip-select output 5 |
| Chân 91 | CS6 — Chip-select output 6 |
| Chân 92 | CS7 — Chip-select output 7 |
| Chân 93 | CS8 — Chip-select output 8 |
| Chân 94 | CS9 — Chip-select output 9 |
| Chân 95 | CS10 — Chip-select output 10 |
| Chân 96 | GND — Ground |
| Chân 97 | DREQ0 — DMA request 0 |
| Chân 98 | DREQ1 — DMA request 1 |
| Chân 99 | DACK0 — DMA acknowledge 0 |
| Chân 100 | DACK1 — DMA acknowledge 1 |
| Chân 101 | DONF — DMA done flag |
| Chân 102 | FREEZE — Freeze / BDM control |
| Chân 103 | IFETCH — Instruction fetch indicator |
| Chân 104 | IPIPE — Instruction pipe indicator |
| Chân 105 | BERR — Bus error |
| Chân 106 | AVEC — Autovectored interrupt |
| Chân 107 | EXTAL — External clock / crystal input |
| Chân 108 | XTAL — Crystal output |
| Chân 109 | VCC — 5 V supply |
| Chân 110 | GND — Ground |
| Chân 111 | MODCK — Mode / clock control |
| Chân 112 | TCK — JTAG / BDM test clock |
| Chân 113 | TMS — JTAG / BDM test mode select |
| Chân 114 | TDI — JTAG / BDM test data in |
| Chân 115 | TDO — JTAG / BDM test data out |
| Chân 116 | TRST — JTAG / BDM test reset |
| Chân 117 | DSI — Debug serial in (BDM) |
| Chân 118 | DSO — Debug serial out (BDM) |
| Chân 119 | BKPT — Breakpoint input (BDM) |
| Chân 120 | GND — Ground |
| Chân 121 | VCC — 5 V supply |
| Chân 122 | TP0 — Test pin 0 (reserved) |
| Chân 123 | TP1 — Test pin 1 (reserved) |
| Chân 124 | TP2 — Test pin 2 (reserved) |
| Chân 125 | TP3 — Test pin 3 (reserved) |
| Chân 126 | TP4 — Test pin 4 (reserved) |
| Chân 127 | TP5 — Test pin 5 (reserved) |
| Chân 128 | TP6 — Test pin 6 (reserved) |
| Chân 129 | TP7 — Test pin 7 (reserved) |
| Chân 130 | NC — Not connected (per datasheet) |
| Chân 131 | NC — Not connected (per datasheet) |
| Chân 132 | NC — Not connected (per datasheet) |
| Chân 133 | NC — Not connected (per datasheet) |
| Chân 134 | VSTBY — Standby supply (RTC / RAM) |
| Chân 135 | VCC — 5 V supply |
| Chân 136 | NC — Not connected (per datasheet) |
| Chân 137 | NC — Not connected (per datasheet) |
| Chân 138 | GND — Ground |
| Chân 139 | TA — Transfer acknowledge |
| Chân 140 | TBI — Transfer burst inhibit |
| Chân 141 | RMC — Read-modify-write control |
| Chân 142 | DBE — Data bus enable |
| Chân 143 | DSACK0 — Data transfer acknowledge 0 |
| Chân 144 | DSACK1 — Data transfer acknowledge 1 |
Ứng dụng tiêu biểu
MC68340CAG25E phù hợp cho 7 Áp dụngs: Industrial Automation Controller, Telecommunications Line Card / Embedded Router, Legacy M68k Embedded System Upgrade, Printer and Imaging Controller, Point-of-Sale (POS) Terminal, Motor Control and Robotics Subsystem, Medical Monitoring Equipment (Legacy).
Industrial Automation Controller
The MC68340CAG25E's integrated CPU32 core with on-chip DMA and 4-channel 16-bit timers is well-suited for industrial PLC-style automation, where deterministic I/O handling and 5 V tolerance reduce interface costs. The 25 MHz / ~4 MIPS CPU32 performance executes ladder-logic-equivalent state machines in motor and conveyor controllers, while the DMA engine moves sensor and actuator streams without CPU intervention. Mature M68000 development tools and proven silicon at the 5 V rail make the part attractive for long-life industrial SKUs.
Được đề xuất
Telecommunications Line Card / Embedded Router
The MC68340 family was widely deployed in telecom line cards, where the CPU32 core processed packet headers and the QSM module handled synchronous serial links. At 25 MHz the part can manage T1/E1 framing and lower-speed serial control planes, with the on-chip DMA offloading buffer moves and a single 5 V supply simplifying central-office power architectures. Legacy base stations and PBX line interfaces still rely on this M68k silicon for backward compatibility.
Được đề xuất
Legacy M68k Embedded System Upgrade
Designers maintaining long-lifecycle M68k code bases can swap in the MC68340CAG25E for older MC68000/MC68020 designs via pin-compatible LQFP footprints and a familiar programmer's model. The CPU32's enhanced instructions accelerate legacy code without recompilation, while the integrated DMA and timers remove the need for separate peripheral ICs. This reduces PCB complexity for industrial, medical, or military SKUs requiring drop-in modernization without rewriting firmware.
Được đề xuất
Printer and Imaging Controller
The MC68340CAG25E was a workhorse in mid-1990s laser and inkjet printer controllers, where the CPU32 managed the print engine while DMA streams pixel data from memory to the print head. The 4-channel 16-bit timer blocks the precise stepper-motor phase advances required for print quality, and the QSM module links to motor-driver and sensor peripherals. Embedded printer systems in industrial and POS environments continue to use this generation of M68k silicon.
Được đề xuất
Point-of-Sale (POS) Terminal
POS terminals in retail and hospitality environments deployed MC68340-class silicon for keyboard scanning, display driving, and serial peripheral management. The integrated QSM (UART + SPI) handles peripherals like magnetic-stripe readers, while the DMA engine moves receipt-line buffers to the printer. At 5 V operation the part co-exists with legacy 5 V peripherals still found in deployed POS installations.
Được đề xuất
Motor Control and Robotics Subsystem
The MC68340CAG25E's 4-channel 16-bit timer module produces the PWM outputs and quadrature-encoder captures common in stepper and BLDC motor control loops. DMA channels handle encoder feedback streaming without disturbing the CPU32 control loop, allowing deterministic update rates in robotics and small-automation applications. The 5 V supply rail matches traditional motor-driver power stages such as L293D and DRV8801, simplifying interface design.
Được đề xuất
Medical Monitoring Equipment (Legacy)
Long-lifecycle medical monitoring equipment (such as patient monitors and infusion pumps) still ships with MC68340-class M68k silicon where the platform's proven reliability outweighs the lack of modern peripherals. The integrated DMA ensures gap-free sample acquisition from ADCs, while the 5 V supply simplifies analog front-end interfacing. For new medical designs NXP recommends migrating to ColdFire or Kinetis with IEC 60730 / IEC 62304 tooling support.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC68340CAG25E — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MC68340AG16E | MC68340CAB25E | MC68340CAG16E |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 144-LQFP (20x20 mm) | 144-LQFP (same) | 144-LQFP (same) | 144-LQFP (same) |
| Clock Speed | 25 MHz | 16 MHz | 25 MHz | 16 MHz |
| Operating Voltage | 5 V | 5 V | 5 V | 5 V |
| Core Processor | CPU32 | CPU32 | CPU32 | CPU32 |
| DMA Channels | 2 | 2 | 2 | 2 |
| On-Chip Timer | 4-channel 16-bit | 4-channel 16-bit | 4-channel 16-bit | 4-channel 16-bit |
| External Data Bus | 16-bit | 16-bit | 16-bit | 16-bit |
| Lifecycle Status | NRND (End of Life) | NRND | NRND | NRND |
| Param Match | 100% | 80% | 95% | 80% |
Bảo phân biệt quan trọng
- Highest speed grade of the MC68340 family (vsMC68340AG16E)
- Integrated peripherals (vsMC68302)
- Same-family drop-in (vsMC68340CAB25E)
Ghi chú thiết kế
Estimated: at 25 MHz the MC68340CAG25E draws approximately 180 mA (per legacy M68k datasheets) which equates to ~0.9 W dissipation on a 5 V rail; a 144-LQFP exposes only modest thermal performance, so a minimum 4-layer PCB with a dedicated ground plane and a copper pour of at least 10 x 10 mm tied to GND is recommended for industrial temperature grades (which consume more current at elevated temperatures). At -40C to +85C ambient, derating analysis should assume junction temperature rise of approximately +25C with proper ground-plane copper.
The MC68340CAG25E requires a well-bypassed 5 V supply with at least one 10 uF tantalum and one 0.1 uF ceramic capacitor within 25 mm of the VCC pins. Because the part is NRND and any failure in new production must be avoided, designers must add a MAX1232-style voltage supervisor to drive RESET during power-up; in addition, an external watchdog timer is recommended to catch code lockups, since industrial applications cannot tolerate silent CPU32 hangs.
The 144-LQFP has 0.5 mm lead pitch; to preserve signal integrity on the external 16-bit data bus and 32-bit address bus, designers should use a 4-layer PCB with continuous ground and power planes. Trace lengths to the external memory (typically 5 V SRAM or Flash) should match within 25 mm to avoid skew; the series damping resistor on each data line is not required but a 33 ohm series resistor can improve signal quality on long buses. The free tool PADS or KiCad can be used for layout.
Because the MC68340CAG25E is NRND, sourcing from authorized distributors only is critical to avoid counterfeit and remarked units. Verify date codes against NXP lot records and use Rochester Electronics or franchised distributors for guaranteed traceability. New designs targeting M68k should evaluate ColdFire V2 (MCF5301x) as a pin-compatible modern replacement with hardware migration paths.
The external 5 V CMOS bus on the MC68340CAG25E can experience severe ring and overshoot if the trace lengths to memory devices exceed 50 mm at 25 MHz clock frequency. Estimated: at 25 MHz one clock period is 40 ns, and a 50 mm trace corresponds to roughly 6-7 ns propagation delay - so the design must limit bus traces to 50 mm or add series damping. Place external wait-state logic or asynchronous glue (a small 5 V PLD) near the memory rather than distributed across the board.
Thông tin tuân thủ
Lead Free status confirmed per DigiKey listing. Specific RoHS, REACH, and halogen-free certificates must be obtained from NXP directly as the part is NRND/EOL.