Freescale MCF51MM256人体活动监视器参考设计
Freescale公司的MCF51MM256是低成本低功耗高性能ColdFire V1系列32位MCU,工作频率高达50.33 MHz,主要用于手持计量设备.本文介绍了MCF51MM256主要特性,框图,以及人体活动监视器参考设计RDACTIVITYMONITOR主要特性,框图和应用示意图,电路图,材料清单和PCB外形图.
The MCF51MM256 series devices are members of the low-cost, low-power, high-performance ColdFire V1 family of 32-bit microcontrollers (MCUs) designed for handheld metering devices.
MCF51MM256主要特性:
32-Bit ColdFire V1 Central Processor Unit (CPU)
• Up to 50.33 MHz ColdFire CPU above 2.4 V and 40 MHz CPU above 2.1V and 20 MHz CPU above 1.8 V across temperature range of -40℃ to 105℃.
• ColdFire Instruction Set Revision C (ISA_C).
• 32-bit multiply and accumulate (MAC) supports signed or unsigned integer or signed fractional inputs.
On-Chip Memory
• 256 K Flash comprised of two independent 128 K flash arrays; read/program/erase over full operating voltage and temperature; allows interrupt processing while programming.
• 32 KB System Random-access memory (RAM).
• Security circuitry to prevent unauthorized access to RAM and
Flash contents.
Power-Saving Modes..
