原标题：Freescale MC9S08JM16血糖监视仪(BGM)解决方案

　　freescale公司的MC9S08JM16是低成本高性能的HCS08系列MCU.CPU工作频率48MHz,内部总线频率24MHz,16KB在电路可编程的闪存,1KB RAM以及256B USB RAM.外设包括有USB, ADC, ACMP, SCI, SPI, IIC, 定时器,KBI和RTC等.广泛应用在PC外设和I/O模块,照明控制系统,测试和测量设备,条形码扫描系统,病人监视系统,工业网络设备和POS打印机等.本文介绍了MC9S08JM16系列的主要特性,方框图,基本系统连接图以及S08JM16评估板主要特性,详细电路图和采用S08JM16的血糖监视仪方框图和所用的主要元器件.

　　MC9S08JM16 series MCUs are members of the low-cost, high-performance HCS08 family of 8-bit microcontroller units (MCUs). All MCUs in the family use the enhanced HCS08 core and are available with a variety of modules, memory sizes, memory types, and package types.

　　MC9S08JM16系列主要特性:

　　8-Bit HCS08 Central Processor Unit (CPU)

　　• 48 MHz HCS08 CPU (central processor unit)

　　• 24 MHz internal bus frequency

　　• HC08 instruction set with added BGND instruction

　　• Background debugging system

　　• Breakpoint capability to allow single breakpoint setting during in-circuit debugging (plus two more breakpoints in on-chip debug module)

　　• In-circuit emulator (ICE) debug module containing two comparators and nine trigger modes. Eight deep FIFO for storing change-of-flow addresses and event-only data. Debug module supports both tag and force breakpoints

　　• Support for up to 32 interrupt/reset sources

　　Memory Options

　　• Up to 16 KB of on-chip in-circuit programmable flash memory with block protection and security options

　　• Up to 1 KB of on-chip RAM

　　• 256 bytes of USB RAM

　　Clock Source Options

　　• Clock source options include crystal, resonator, external clock

　　• MCG (multi-purpose clock generator) — PLL and FLL; internal reference clock with trim adjustment

　　System Protection

　　• Optional computer operating properly (COP) reset with option to run from independent 1 kHz internal clock source or the bus clock

　　• Low-voltage detection with reset or interrupt

　　• Illegal opcode detection with reset

　　• Illegal address detection with reset

　　Power-Saving Modes

　　• Wait plus two stops

　　Peripherals

　　• USB — USB 2.0 full-speed (12 Mbps) with dedicated on-chip 3.3 V regulator and transceiver; supporting endpoint 0 and up to 6 additional endpoints

　　• ADC — 8-channel, 12-bit analog-to-digital converter with automatic compare function;

　　internal temperature sensor

　　• ACMP — Analog comparator with option to ompare to internal reference; operation in stop3 mode

　　• SCI — Up to two serial communications interface modules with optional 13-bit break; LIN

　　Extensions

　　• SPI — Two 8- or 16-bit selectable serial peripheral interface modules with a receive data buffer hardware match function

　　• IIC — Inter-integrated circuit bus module to operate at up to 100 kbps with maximum bus

　　loading; multi-master operation; programmable slave address; interrupt-driven yte-by-byte data transfer; broadcast mode; 10-bit addressing

　　• Timers — One 2-channel and one 4-channel 16-bit timer/pulse-width modulator (TPM)

　　modules; selectable input capture, output compare, and edge-aligned PWM capability on

　　each channel. Each timer module may be configured for buffered, centered PWM (CPWM) on all channels

　　• KBI — 7-pin keyboard interrupt module

　　• RTC — Real-time counter with binary- or decimal-based prescaler

　　Input/Output

　　• Up to 37 general purpose input/output pins

　　• Software selectable pullup on ports when used as inputs

　　• Software selectable slew rate control on ports when used as outputs

　　• Software selectable drive strength on ports when used as outputs

　　• Master reset pin and power-on reset (POR)

　　• Internal pullup on RESET, IRQ, and BKGD/MS pins to reduce customer system cost

　　Package Options

　　• 48-pin quad flat no-lead (QFN)

　　• 44-pin low-profile quad flat package (LQFP)

　　• 32-pin low-profile quad flat package (LQFP)

　　图1.MC9S08JM16系列方框图

　　图2.MC9S08JM16基本系统连接图

　　9S08JM16评估板

　　DEMO9S08JM16 is a cost-effective demonstration kit enabling quick MC9S08JM16 evaluation. The kit includes a DEMOJM base board and a MC9S08JM16 daughter card and can be used to demonstrate the features of the MC9S08JM16 device, starting with the on-chip USB 2.0 full-speed device controller and transceiver. The USB features are supported in hardware through a dedicated USB mini-AB connector and in software through the included complimentary USB-LITE stack by CMX. Built-in USB-BDM circuitry is available for debugging and programming, serial communication and simple logic analyzer.

　　9S08JM16评估板主要特性:

　　On-board Logic Analyzer

　　On-board Virtual Serial Port

　　ON/OFF Power Switch w/ LED indicator

　　A 6VDC to 12VDC power supply input barrel connector

　　USB device mode and host mode support with Mini-AB USB connector

　　CAN Module with Enable

　　3-axis Accelerometer with Enable

　　8 User LED’s with Enable

　　4 User Push Buttons with Enable

　　1 Piezo Buzzer with Enable

　　1 Piezo Buzzer with Enable

　　I²C Pullups with Enable

　　10K Ohm POT with Enable

　　图3.S08JM16评估板外形图

　　血糖监视仪方框图

　　A glucometer is a device for determining the approximate concentration of glucose in the blood. It is a key element of home blood glucose monitoring (HBGM) for people with diabetes mellitus.

　　图8.血糖监视仪方框图

　　血糖监视仪方框图所用主要元器件

　　MCU/MPU:

　　S08JM

　　MCF51JM

　　S08JS

　　S08LL

　　MCF51QE

　　电源管理:

　　MC34712

　　MC34713

　　MC34716

　　MC34717

传感器:

　　MMA745xL

　　Keypad:

　　MPR083

　　MPR084

　　无线通信:

　　MC13191