原标题：Freescale DSC 解决方案

　　The MC56F825x/MC56F824x is a member of the 56800E core-based family of digital signal controllers (DSCs). It combines, on a single chip, DSP processing power and microcontroller functionality with a flexible set of peripherals including an eFlexPWM module with NanoEdge placement as well as two ultra-fast analog-to-digital converters (ADCs), creating a cost-effective solution. Because of its low cost, configuration flexibility and compact program code, it is a perfect fit for power conversion and motor control applications, also making it well-suited for many other consumer and industrial applications.

　　方案简介：

　　The MC56F8257 Tower MCU module (TWR-56F8257) is a cost-effective evaluation, demonstration and development board. The

　　TWR-56F8257 can operate stand-alone or as the main control board in a Tower System with peripheral modules.

　　The following list summarizes the features of the TWR-56F8257:

　　• Tower-compatible microcontroller module

　　• Selectable power sources:

　　USB

　　Barrel connector

　　Motor control board

　　Tower elevator board

　　• Filtered power for VDDA and VSSA on the MC56F8257DSC

　　• MC56F8257 digital signal controller (DSC) in an 64 LQFP package

　　• Optional 8 MHz crystal circuit for the MC56F8257 DSC

　　• Nine LEDs controlled by the MC56F8257 DSC

　　• Motor control board connector for the APMOTOR56F8000E motor control board

　　• Auxiliary signal connector

　　• Four thermistors for single-ended or differential analog inputs to the MC56F8257 DSC

　　• CAN transceiver, header and termination

　　• Two push buttons for user input or interrupts to the MC56F8257 DSC

　　• Reset push button for the MC56F8257 DSC

　　• JTAG header for the MC56F8257 DSC with header to disconnect from OSBDM

　　• Headers to connect SCI signals to either USB bridge or elevator board

　　• Expansion via primary elevator connector

　　• MC9S08JM60 MCU with a 4 MHz crystal provides:

　　Open source debug (OSBDM) circuit

　　USB to SCI bridge

　　Header to select between OSBDM and USB to SCI bridge functions

　　Bootloader enable header

　　BDM header for the MC9S08JM60 MCU

　　Status and target power indicator LEDs

　　Control of semiconductor switch to enable power to board from USB

　　Voltage translators between 5V MC9S08JM60 MCU chip and 3.3V MC56F8257 DSC chip