MCF51JM64EVQH - ColdFire V1 32-bit MCU 50MHz 64KB Flash | NXP
MPN： MCF51JM64EVQH ✓ 啟用中MCF51JM64EVQH 概覽
A microcontroller (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and peripheral functions such as timers, serial interfaces, and analog blocks into one chip. Microcontrollers sit at the heart of embedded systems, controlling everything from consumer appliances to industrial automation equipment. The ColdFire V1 architecture is a 32-bit instruction-set-compatible member of the broader ColdFire microprocessor family, offering an upgrade path from 8-bit MCUs to 32-bit performance without a steep software learning curve.
Key features of the MCF51JM64EVQH include the 50 MHz ColdFire V1 RISC core, 64 KB of on-chip Flash organized as 64K x 8, and 16 KB of RAM for data and stack. The dual-supply capability of 3.3 V and 5 V simplifies integration into both legacy 5 V industrial designs and modern 3.3 V systems. The 64-QFP 14 x 14 mm package provides a good balance of I/O count and board area for medium-complexity embedded designs.
The JM sub-family integrates USB connectivity alongside standard serial peripherals, positioning it for human interface devices, USB-to-serial bridging, and control panels. The ColdFire V1 core executes compact 32-bit code with deterministic behavior suited to control-loop and communication tasks.
Typical applications include USB-enabled industrial controllers, consumer appliance interfaces, motor control panels, and test equipment front ends.
A key design consideration is supply selection: operating at 5 V improves noise margin in industrial environments, while 3.3 V operation reduces power dissipation; verify Flash programming and peripheral timing margins at the chosen supply.
This page consolidates distributor pricing tiers, drop-in alternatives, and practical design guidance not found in the manufacturer datasheet alone.
直接替換替代品，適用於 MCF51JM64EVQH — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MCF51JM64EVQH （相同外形與佔位） — 差異在於 Package, Supply Voltage, Maximum Clock Frequency, Program Memory Size, RAM Size.
MCF51JM128EVQH
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MCF51JM32EVQH
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MCF51AC256ACFUE
✅ 直接替換✓ 有庫存
$8.12 / 單位
查看資料表 →MCF51JM64EVQH 最大額定值與電氣特性
| Core Processor | ColdFire V1 |
| Core Size | 32-Bit |
| 最大時脈頻率 | 50 MHz |
| Flash Program Memory | 64 KB (64K x 8) |
| RAM Size | 16 KB |
| 供應電壓 | 3.3 V / 5 V |
| Series | MCF51JM |
| 封裝 | 64-QFP (14 x 14 mm) |
| 安裝類型 | Surface Mount |
| Packaging | Tray |
| Architecture | RISC |
| Manufacturer (Legacy) | Freescale Semiconductor (now NXP) |
MCF51JM64EVQH 64-qfp (14 x 14 mm) 腳位配置指南
MCF51JM64EVQH（64-qfp (14 x 14 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： MCF51JM64EVQH.
請參閱 資料表 以查看完整腳位配置。
典型應用
MCF51JM64EVQH 適用於 6 應用s: USB Human Interface Devices, Industrial Control Panels, USB-to-Serial Bridging, Appliance Control Systems, Test and Measurement Front Ends, Motor Control and Actuator Drivers.
USB Human Interface Devices
The MCF51JM64EVQH fits USB HID designs such as keyboards, control panels, and instrumentation front ends because the JM family integrates USB connectivity with a 50 MHz ColdFire V1 core and 16 KB of RAM for endpoint buffering. The dual 3.3 V/5 V supply capability lets the device interface directly with legacy 5 V indicator circuitry while presenting a standard USB interface to the host. Firmware handles enumeration, report transfers, and application logic concurrently; the 64 KB Flash accommodates a full USB stack plus application code with margin. The 64-QFP package provides enough GPIO for key matrices and status LEDs in a single 14 x 14 mm footprint.
推薦
Industrial Control Panels
In industrial control panels, the MCF51JM64EVQH operates at 5 V for superior noise margin in electrically harsh environments, executing deterministic 32-bit control loops at 50 MHz. The 64 KB Flash holds ladder-logic interpreters, PID routines, and serial communication code, while 16 KB of RAM supports data logging buffers. The 64-QFP (14 x 14 mm) package offers sufficient I/O for relays, buttons, and status indicators. Its surface-mount QFP construction suits standard industrial PCB assembly, and the ColdFire V1 architecture provides a well-documented upgrade path from 8-bit panel controllers without changing toolchains wholesale.
推薦
USB-to-Serial Bridging
The MCF51JM64EVQH implements USB-to-UART/RS-232 bridge firmware using its on-chip USB peripheral and serial communication interfaces, converting between a USB device port and legacy serial equipment. The 50 MHz core services USB transactions and serial shifting concurrently with protocol translation, and the 16 KB RAM buffers burst data in both directions. Operating at 5 V simplifies level interfacing to RS-232 transceivers, while 3.3 V operation suits modern logic. The 64 KB Flash stores a compact USB CDC stack plus vendor-specific commands. The 64-QFP package leaves spare GPIO for flow-control and handshaking lines in a compact board area.
推薦
Appliance Control Systems
Consumer appliance controllers benefit from the MCF51JM64EVQH's combination of 32-bit performance, 64 KB of in-system Flash for field-updatable firmware, and dual 3.3 V/5 V supply flexibility. The 50 MHz ColdFire V1 core handles touch-scan routines, display refresh, and temperature regulation loops with deterministic timing, while the 64-QFP package supplies enough GPIO for seven-segment displays, keypads, and actuator drives in a 14 x 14 mm footprint. The 16 KB RAM supports state machines and sensor filtering. Flash reprogramming in-system enables firmware updates during manufacturing and service, a practical advantage over mask-ROM 8-bit controllers.
推薦
Test and Measurement Front Ends
In bench instruments and data-logging front ends, the MCF51JM64EVQH manages user interfaces, USB data upload, and control sequencing with its 50 MHz 32-bit core. The 16 KB of RAM buffers measurement results between acquisition bursts and USB transfers, and 64 KB of Flash holds calibration tables and command interpreters. The JM-family USB port provides a plug-and-play link to PCs without external bridge chips, reducing BOM cost. Operation at 5 V improves analog-to-digital interfacing noise margins in front-end circuits. The 64-QFP 14 x 14 mm package integrates cleanly into modular instrument main boards with standard SMT processes.
推薦
Motor Control and Actuator Drivers
The MCF51JM64EVQH executes PWM generation, current-limit supervision, and communication for small motor and actuator control nodes. Its 50 MHz ColdFire V1 core computes commutation timing with headroom, and its 32-bit arithmetic simplifies PID speed-loop implementation compared to 8-bit devices. At 5 V, gate-drive and optocoupler interfacing is direct; 16 KB of RAM holds filter states and fault logs, while 64 KB Flash stores multiple profile sets. The 64-QFP (14 x 14 mm) package provides sufficient timers and GPIO for H-bridge control signals and feedback inputs, making it a compact single-chip controller for industrial automation subsystems.
推薦
推薦產品摘要
工程參考資料，適用於 MCF51JM64EVQH — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MCF51JM128EVQH | MCF51JM32EVQH | MCF51AC256ACFUE |
|---|---|---|---|---|
| Package | 64-QFP (14 x 14 mm) | 64-QFP (14 x 14 mm) - same | 64-QFP (14 x 14 mm) - same | 64-QFP - same package type, verify pinout |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Architecture | ColdFire V1, 32-bit RISC | ColdFire V1, 32-bit RISC | ColdFire V1, 32-bit RISC | ColdFire V1, 32-bit RISC (AC family) |
| Flash Memory | 64 KB | 128 KB | 32 KB | 256 KB |
| Supply Voltage | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V |
| Key Advantage | Balanced 64 KB Flash / 16 KB RAM | 2x Flash headroom in same footprint | Lower cost for small firmware | 4x Flash for large applications |
主要差異化特點
- Optimal memory balance for USB-class firmware (對比MCF51JM32EVQH)
- Lower cost than the Flash-doubled variant (對比MCF51JM128EVQH)
- 5 V capable operation (對比MCF51AC256ACFUE)
設計說明
The MCF51JM64EVQH supports both 3.3 V and 5 V operation. Select 5 V in industrial environments where noise margin and direct 5 V sensor/optocoupler interfacing matter; select 3.3 V to reduce power dissipation and interface with modern 3.3 V logic and memories. Provide a solid ground plane and place 0.1 uF decoupling capacitors at each supply pin pair, plus one bulk 10 uF capacitor per supply domain. When dual-rail systems share the MCU I/O, add series resistors on level-crossing signal lines to limit injection current during transients.
The 64-QFP (14 x 14 mm) package has a 0.5 mm lead pitch - inspect reflow profiles and stencil design to prevent solder bridging between adjacent leads. Use a footprint per the NXP recommended land pattern and maintain at least 0.2 mm trace width escape routing between pins without via-in-pad. Place the USB differential pair with 90-ohm controlled impedance and matched lengths when the on-chip USB is used. Keep the crystal circuit short, with ground guard traces, for reliable 50 MHz clock start-up across temperature.
This is a legacy Freescale-designed part (datasheet published 2008); confirm the exact operating temperature grade, Flash endurance, and peripheral availability in the current NXP datasheet revision before design freeze - distributor listings do not state the operating temperature range. Do not assume a JM128 swap is free of firmware changes: the 128 KB variant may remap Flash protection regions. When substituting family members, re-verify every register-level peripheral configuration and Flash programming algorithm against the relevant reference manual.
合規資訊
Compliance status not stated in the provided verified web data; verify on the NXP product page or distributor compliance documents before procurement.
