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MCF51AC: Flexis 32-bit ColdFire® V1 Microcontrollers

The MCF51AC 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 25 MHz 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 to deliver the ultimate in migration flexibility.

Features

V1 ColdFire core with background debug module
Up to 256 KB of flash memory
Up to 32 KB of static RAM (SRAM)
Up to two analog comparators (ACMP)
ADC with up to 24 channels
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)
The MCF51AC256 is included in Freescale’s product longevity program, with assured supply for a minimum of 10 years after launch

Featured Documentation

MCF51AC256: MCF51AC256 Series ColdFire Microcontroller - Data Sheet
MCF51AC256RM: MCF51AC256 ColdFire ® Integrated Microcontroller - Reference Manual
MCF51AC256128FS: MCF51AC256/128 Fact Sheet
AN2764: AN2764, Improving the Transient Immunity Performance of Microcontroller-Based Applications - Application Notes

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)
DEMOAC: Flexis AC Demonstration Board
UMultilink: Universal Multilink Development Interface

Target Applications

Consumer

Industrial
- POS Printer
- Building Control
- HVAC Building and Control Systems
- Pumps
- Industrial Compressors
- Digital Power Conversion

Motor Control

MCF51AC Family Members

Features	MCF51AC256	MCF51AC128
CORE Speed (MHz)	50	50
FLASH	256,000	128,000
RAM	32,000	32,000/16,000
GPIO	69/54	69/54
RGPIO	16	16
KBI	8	8
ADC Channels (12-bit)	24	24
ACMP	2	2
Serial Communications	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 32 KB RAM. The other members have 16 KB 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.}