The AC family, comprised of pin-compatible 8-bit and 32-bit device duos, is the third family in the Flexis™ series. The Flexis series of controllers is the connection point on the Freescale Controller Continuum, where 8- and 32-bit compatibility becomes reality.
The MCF51AC256/128 device extends the low end of the 32-bit ColdFire controller family with up to 256 Kb flash memory, a controller area network (CAN) module, a 16-bit FlexTimer module, 24-channel, 12-bit analog-to-digital converter (ADC) and delivers up to 25MHz in bus frequency. The 32-bit MCF51AC256/128 is pin-, peripheral- and tool-compatible with the 8-bit S08AC128/96/60/48/32 devices. They share a common set of peripherals and development tools delivering the ultimate in migration flexibility.
Features
The MCF51AC256 features the following functional units:
- V1 ColdFire core with background debug module
- Up to 256 KBytes of flash memory
- Up to 32 Kbytes of static RAM (SRAM)
- Up to two analog comparators (ACMP)
- Analog-to-digital converter (ADC) with up to 24 channels
- Controller-area network (CAN)
- Cyclic redundancy check (CRC)
- Inter-integrated circuit (IIC)
- Keyboard interrupt (KBI)
- Multipurpose clock generator (MCG)
- Rapid general-purpose input/output (RGPIO)
- Two serial communications interfaces (SCI)
- Up to two serial peripheral interfaces (SPI)
- Two flexible timer modules (FTM)
- Timer pulse-width modulator (TPM)
Featured Documentation
- MCF51AC256: MCF51AC256 Data Sheet
- MCF51AC256RM: MCF51AC256 Reference Manual
- MCF51AC256128FS: MCF51AC256/128 Fact Sheet
- AN2764: Improving the Transient Immunity Performance of Microcontroller-Based Applications
Current Updates & Releases
- CWX-H08-SE: Special Edition: CodeWarrior for Microcontrollers
- CWX-H08-PROED-EX: Evaluation: CodeWarrior for Microcontrollers
- DEMOAC: Flexis™ AC Demonstration Board
Target Applications
- General Industrial Applications
- Motor Control
- Building Control
- HVAC Systems
- Inverters
- Pumps
- Compressors
- Printers
- Appliance Applications
MCF51AC Family Members
| Features | MCF51AC256 | MCF51AC128 |
| CORE Speed (MHz) | 50 | 50 |
| FLASH (Bytes) | 256,000 | 128,000 |
| RAM (Bytes) | 32,000 | 32,000 / 16,000 |
| GPIO | 69 / 54 | 69 / 54 |
| RGPIO | 16 | 16 |
| Keyboard Interrupt | 8 | 8 |
| ADC Channels (12-bit) | 24 | 24 |
| ACMP | 2 | 2 |
| Serial Comunications | I2C Two SCI Two SPI CAN |
I2C Two SCI Two SPI CAN1 |
| FlexTimer Module (FTM) | FTM1 6-channels FTM2 up to 6-channels |
FTM1 6-channels FTM2 up to 6-channels |
| Timers (TPM) | Two Timer 2-channels | Two Timer 2-channels |
| Package | 80-Pin LQFP 64-Pin LQFP 64-Pin QFP | 80-Pin LQFP 64-Pin LQFP 64-Pin QFP |
1 .- The members of MCF51AC128 with CAN support have 32K-byte RAM. The other members have 16K-byte RAM and Not all members of the family support CAN
The EMC performance of an application using this microcontroller is dependent on a number of factors that are outside the control of Freescale Semiconductor. These factors include but are not limited to industrial design, mechanical design, printed circuit board design and layout, components, connectors, and cables. Freescale Semiconductor is unable to guarantee the EMC performance of any microcontroller in a specific application. Careful consideration must be made when designing any application to ensure the necessary level of EMC. For more information on designing robust EMC systems please refer to application note AN2764.
Product Specifications
| Bus Frequency - Max (MHz) | 25 |
| Internal Flash (kByte) | 256, 128 |
| Internal RAM (kByte) | 32, 16 |
| Serial Interface - Type | SCI, SPI, CAN, I2C, SPI |
| I/O Pins | 54, 70, 69 |
| Supply Voltage - Typ (V) | 5 |
Get Started
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Flexis AC
DEMOAC Video Link
