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The MCF51JE256/128 (JE256/128) provides ultra low-power operation, USB connectivity and high measurement accuracy, all in a single 32-bit microcontroller (MCU), allowing designers to develop a more fully featured system at a lower cost. The JE256/128 integrates high-resolution analog-to-digital converter (ADC) and digital-to-analog converter (DAC) modules, rich peripheral set including a USB 2.0 host/device/on-the-go controller, multiple serial interfaces and an external bus interface.
The JE256/128 is part of Freescale's Flexis MCU series, which includes both 8-bit S08 and 32-bit V1 ColdFire MCUs that have a common set of peripherals and development tools to deliver the ultimate in migration flexibility. Freescale provides a comprehensive suite of development tools and software to help developers design quickly and easily.
Features
- On-chip memory
- Up to 256 KB flash
- Up to 32 KB SRAM
- Mini FlexBus (external bus interface)
- Measurement engine unit
- 12-bit SAR ADC-high resolution ADC
- Programmable delay block
- PRACMP - analog comparator with 5-bit DAC
- Internal voltage reference
- Communication peripherals
- USB device/host/on-the-go controller
- 2 x serial peripheral interface (SPI)
- 2 x serial communication interface (SCI)
- I²C
- Timers
- 2 x 4-channel timer
- Pulse width modulator
- Time of day module
- Carrier modulator timer
- System integration
- 2 x keyboard interrupts (KBI)
- Low-voltage indicator
- Low-power stop 2 current:500 nA (32 KB of active SRAM)
- This product is included in Freescale’s product longevity program, with assured supply for a minimum of 15 years after launch
Energy Efficiency Quick Facts
- The Flexis JE MCUs offer a complete solution for creating long-lasting portable applications with USB connectivity.
- Low-power, modified matrix-type resistor-ladder DAC reduces power by a factor of five compared to other DAC implementations
- VREF power level is configurable
- Two ultra-low-power stop modes
- Clock gating registers disable clocks to unused peripherals
- Learn more about the Freescale energy efficient solutions
Featured Documentation
- MCF51JE256: MCF51JE256/128 - Data Sheet
- MCF51JE256RM: MCF51JE256 - Reference Manual
- MCF51JE256FS: MCF51JE256/128 Ultra-low-power MCU with USB connectivity - Fact Sheet
Featured Software and Tools
- EGUI: Freescale eGUI: Graphical LCD Driver for MCUs/MPUs
- CWX-MCU-LLPLT-EX: Evaluation: CodeWarrior for Microcontrollers 10.4 (Eclipse, Offline)
- CWX-MCU-SELH: Special Edition: CodeWarrior for Microcontrollers 10.4 (Eclipse, Offline)
- CWX-MCU-PROED-EX: Evaluation: CodeWarrior for Microcontrollers 10.4 (Eclipse, Online)
- CWX-MCU-SE: Special Edition: CodeWarrior for Microcontrollers 10.4 (Eclipse, Online)
- TWR-MCF51JE: ColdFire Flexis MCF51JE Low-Power USB Tower System Module
- TWR-ELEV: Tower System Elevator Module
- TWR-SER: Serial (USB, Ethernet, CAN, RS232/485) Tower System Module
- TWR-LCD: Graphical LCD Tower System Module
- CW-MICROCONTROLLERS: CodeWarrior for Microcontrollers (Classic IDE) - RS08/HC(S)08, ColdFire V1
Target Applications
- Consumer
- PC Peripherals
- Industrial
- HVAC Building and Control Systems
- Industrial Networking
- Lighting Control
Product Specifications
| Bus Frequency - Max (MHz) | 25 |
| Internal Flash (KB) | 256, 128 |
| Internal RAM (KB) | 32 |
| Serial Interface - Type | SPI, USB, I2C, SCI |
| A/D Converter - Bits (bit) | 12 |
| I/O Pins | 65, 48, 69, 47 |
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