浅谈手持医疗保健设备NXPJN5148-001的开发方案

NXP 公司的JN5148-001是超低功耗高性能无线微控制器(MCU)，具有32位RISC处理器特性，还集成了2.4GHz IEEE802.15.4兼容的收发器，128KB ROM，128KB RAM和各种丰富的模拟与数字外设，可以运行JenNet和ZigBee PRO。收发器的数据速率500和667kbps，工作电压2.0V-3.6V，MCU的时钟速率4- 32MHz。主要用在机器人和安全低功耗无线应用，JenNet和ZigBee PRO网络，智能计量，家庭和商业建筑物自动化，工业系统，遥控，手持医疗保健设备，玩具和游戏外设等。本文介绍了JN5148-001主要特性和优势，功能框图，无线电框图，调制解调器框图和基带处理器框图，参考模块电路图和材料清单以及采用JN5148的手持医疗保健设备框图。

The JN5148-001 is an ultra low power, high performance wireless microcontroller targeted at JenNet and ZigBee PRO networking applications. The device features an enhanced 32-bit RISC processor offering high coding efficiency through variable width instructions, a multi-stage instruction pipeline and low power operation with programmable clock speeds. It also includes a 2.4GHz IEEE802.15.4 compliant transceiver, 128kB of ROM, 128kB of RAM, and a rich mix of analogue and digital peripherals. The large memory footprint allows the device to run both a network stack (e.g. ZigBee PRO) and an embedded application or in a co-processor mode. The operating current is below 18mA, allowing operation direct from a coin cell.

Enhanced peripherals include low power pulse counters running in sleep mode designed for pulse counting in AMR applications and a unique Time of Flight ranging engine, allowing accurate location services to be implemented on wireless sensor networks. It also includes a 4-wire I2S audio interface, to interface directly to mainstream audio CODECs, as well as conventional MCU peripherals.

JN5148-001优势：

• Single chip integrates transceiver and microcontroller for wireless sensor networks

• Large memory footprint to run ZigBee PRO or JenNet together with an application

• Very low current solution for long battery life

• Highly featured 32-bit RISC CPU for high performance and low power

• System BOM is low in component count and cost

• Extensive user peripherals

JN5148-001主要特性：

收发器：

• 2.4GHz IEEE802.15.4 compliant

• Time of Flight ranging engine

• 128-bit AES security processor

• MAC accelerator with packet formatting, CRCs, address check, auto-acks, timers

• 500 & 667kbps data rate modes

• Integrated sleep oscillator for low power

• On chip power regulation for 2.0V to 3.6V battery operation

• Deep sleep current 100nA

• Sleep current with active sleep timer 1.25μA

• <$0.50 external component cost

• Rx current 17.5mA

• Tx current 15.0mA

• Receiver sensitivity -95dBm

• Transmit power 2.5dBm

MCU特性：

• Low power 32-bit RISC CPU, 4 to 32MHz clock speed

• Variable instruction width for high coding efficiency

• Multi-stage instruction pipeline

• 128kB ROM and 128kB RAM for bootloaded program code & data

• JTAG debug interface

• 4-input 12-bit ADC, 2 12-bit DACs, 2 comparators

• 3 application timer/counters,

• 2 UARTs

• SPI port with 5 selects

• 2-wire serial interface

• 4-wire digital audio interface

• Watchdog timer

• Low power pulse counters

• Up to 21 DIO

Industrial temp (-40℃ to +85℃)

8x8mm 56-lead Punched QFN

Lead-free and RoHS compliant

JN5148-001应用：

• Robust and secure low power wireless applications

• ZigBee PRO and JenNet networks

• Smart metering (e.g. AMR)

• Home and commercial building automation

• Location Aware services – e.g. Asset Tracking

• Industrial systems

• Telemetry

• Remote Control

• Toys and gaming peripherals

图1。JN5148-001方框图

图2。JN5148-001详细功能框图
 

图3。JN5148-001无线电框图

图4。JN5148-001调制解调器框图

图5。JN5148-001基带处理器框图

图6。JN5148-001采用印刷天线参考模块电路图

参考模块材料清单：

低成本手持医疗保健设备

Portable healthcare devices help monitor vital signs, restart the heart, and look inside the body with ultrasound before the patient is taken to the hospital. NXP’s goal is to contribute to home healthcare devices that are easy to use, interoperable and offer diagnostic value so that insurance will cover the cost. This eliminates the need for a hospital visit or stay and reduces healthcare costs.

Many consumer medical devices today simply display health monitoring results and leave the interpretation and logging to end users and their doctors, newer devices feature simple connectivity to log and transmit results automatically. Connectivity is either wired, wireless or combined.

NXP helps you succeed in the increasingly competitive home health care market, helping consumer medical devices offer the following features:

手持医疗保健设备特性：

Ease of use

Highly reliable and safe (government-regulated) operation

Easy, secure connectivity

Low-power operation (i.e. long battery life)

Support for a wide range of voltages (especially lower voltages)

High measurement accuracy

Small form factors

Affordable cost

图7。采用JN5148手持医疗保健设备框图

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