Freescale S08MM128医疗设备开发方案

Freescale公司的 9S08MM128/64/32是Flexis 8位MCU，具有超低功耗，USB连接和支持图像显示以及无与伦比的测量精度。S08MM128工作电压2.4V时的CPU速率高达48MHz，支持多达33条中断/重置源，128KB双阵列闪存读/编/除功能，12KB RAM，并具有安全电路，防止未许可接入RAM和闪存，并有多种外设接口，主要用在工业，仪表，医疗/保健如血压计，心率监视器，血糖仪，ECG等。本文介绍了S08MM128主要特性，方框图，以及开发工具TWR-S08MM128-KIT主要特性，方框图以及电路图。
The 9S08MM128/64/32 provides ultra-low-power operation, USB connectivity, graphic display support and unparalleled measurement accuracy, all in a single 8-bit microcontroller, allowing device designers to create more fully featured products at a lower cost.
The 9S08MM128/64/32 is ideal for medical applications or any other application requiring a significant amount of precision analog such as instrumentation and industrial control. The 9S08MM128/64/32 is part of the Freescale Flexis™ microcontroller series.
S08MM128主要特性：
8-Bit HCS08 Central Processor Unit (CPU)
– Up to 48-MHz CPU above 2.4 V, 40 MHz CPU above 2.1 V, and
20 MHz CPU above 1.8 V across temperature of -40°C to 105°C
– HCS08 instruction set with added BGND instruction
– Support for up to 33 interrupt/reset sources
On-Chip Memory
– 128 K Dual Array Flash read/program/erase over full operating voltage and temperature
– 12 KB Random-access memory (RAM)
– Security circuitry to prevent unauthorized access to RAM and Flash
Power-Saving Modes
– Two ultra-low power stop modes. Peripheral clock enable register can disable clocks to unused modules to reduce currents
– Time of Day (TOD) — Ultra-low power 1/4 sec counter with up to 64s timeout.
– Ultra-low power external oscillator that can be used in stop modes to provide accurate clock source to the TOD. 6 usec typical wake up time from stop3 mode
Clock Source Options
– Oscillator (XOSC1) — Loop-control Pierce oscillator; 32.768 kHz crystal or ceramic resonator d...