原标题：智能手环

应用领域:智能穿戴

方案类型:模块板卡

主要芯片:Nordic;

方案概述

产品功能:

● 0.96寸OLED显示屏,动态切换UI、动态图标

● 运动监测功能,支持自动识别静坐、行走、跑步状态

● 睡眠监测,识别入睡、醒来、深睡、浅睡

● 心率监测,支持静态、动态心率采集,并支持跑步自动开启心率采集功能

● 来电、消息提醒,支持拒听来电、多国语言字库

● 遥控拍照

● 无声闹钟,支持标签设置

● 久坐提醒

● 查找手机

● 防丢提醒

● 抬手亮屏

......

硬件参数:

● 主控芯片

NRF51822QFAC / NRF52832QFAA

● FLASH

256 KB/512 KB + 2 MB

256 KB/512 KB为内部FLASH,用于运行代码。2 MB为外部FLASH,用于存放历史数据、字库、空中升级交换区

● RAM

32 KB / 64 KB

● 显示屏

0.96/0.42/0.49寸单色OLED显示屏,可选白光或蓝光,目前白光为常规颜色,各厂家都会作一定的库存。

● Sensor

KX023/KX022/LIS3DH

可选,PCB预留焊盘,防止某一型号缺货,软件兼容

蓝牙功耗,功耗越高,传输越快。

【NRF51822QFAC】

nRF51822 是功能强大、高灵活性的多协议 SoC,非常适用于 Bluetooth® 低功耗和 2.4GHz 超低功耗无线应用。 nRF51822 基于配备 256kB flash + 16kB RAM 的 32 位 ARM® Cortex™ M0 CPU 而构建。 嵌入式 2.4GHz 收发器支持蓝牙低功耗及 2.4GHz 操作,其中 2.4GHz 模式与 Nordic Semiconductor 的 nRF24L 系列产品无线兼容。

nRF51822 还具备丰富的模拟和数字周边产品,可以在无需 CPU 参与的情况下通过可编程周边产品互联 (PPI) 系统进行互动。 灵活的 31 引脚 GPIO 映射方案可使 I/O(例如串行接口、PWM 和正弦解调器)根据 PCB 需求指示映射到任何设备引脚。 这可实现完全的设计灵活性及引脚位置和功能。

nRF51822 支持 S110 蓝牙低功耗协议堆栈及 2.4GHz 协议堆栈(包括 Gazell),这两种协议堆栈在 nRF518 软件开发套件中均免费提供。nRF51822 需要单独供电,如果供电范围在 1.8-3.6V 之间,用户可选择使用芯片上的线性整流器,如果供电范围在 2.1-3.6V 之间,可以选择直流 1.8V 模式和芯片上的 DCDC 变压器。DC-DC 变压器的使用可在工作期间动态控制,并使 nRF51822 工作期间的射频峰值电流低于 10 mA @ 3V 供电 (TX @ 0 dBm & RX)。

nRF51822 具有 6x6mm 48 引脚 QFN 封装和 3.5x3.8mm 64 球形晶片水平芯片级封装 (WLCSP)。

nRF51822 提供 256k 或 128kB Flash 容量的不同版本。

FEATURES

单芯片, 高灵活性, 2.4GHz 多协议设备

32 位 ARM Cortex M0 CPU 内核

256KB flash 16KB RAM

支持 S110 蓝牙低功耗协议堆栈

S110 需要 80 kB 内存空间

线程安全和运行时保护

事件驱动 API

与 nRF24L 系列无线兼容

3 种数据率 (2Mbps/1Mbps/250kbps)

+4dBm 输出功率

-92.5dBm 敏感度、蓝牙低功耗

用于最大化能源效率应用和代码简化的 PPI 系统

具备对每个周边产品进行自动能源管理的灵活能源管理系统

用于模拟和数字 I/O 的可配置 I/O 映射

APPLICATIONS

移动电话配件

PC 周边产品

消费电子 (CE) 遥控器

邻近/警报传感器

运动、健身和医疗保健传感器

智能 RF 标记

玩具和电子游戏

智能家用设备

工业和商用传感器

【nRF52832】

Advanced performance Bluetooth5/ANT/2.4GHz proprietary SoC

Active

The nRF52832 SoC is a powerful, highly flexible ultra-low power multiprotocol SoC ideally suited for Bluetooth® low energy (previously called Bluetooth Smart), ANT and 2.4GHz ultra low-power wireless applications. The nRF52832 SoC is built around a 32-bit ARM® Cortex™-M4F CPU with 512kB + 64kB RAM. The embedded 2.4GHz transceiver supports Bluetooth low energy, ANT and proprietary 2.4 GHz protocol stack. It is on air compatible with the nRF51 Series, nRF24L and nRF24AP Series products from Nordic Semiconductor.

Bluetooth 5

The nRF52832 has hardware support on-chip for Bluetooth 5. This includes high throughput and advertising extension.

Processing power

The nRF52832 incorporates a powerful Cortex-M4F processor enabling the most demanding applications with complex arithmetic requirements to be realized in a single chip solution. The IC supports DSP instructions, a Floating Point Unit (FPU), single-cycle multiply and accumulate, and hardware divide for energy-efficient process of computationally complex operations.

Multiprotocol radio

The 2.4GHz radio supports multiple protocols including Bluetooth Low Energy, ANT and 2.4GHz proprietary. The radio has high definition RSSI and highly automated functionality, including EasyDMA for direct memory access during packet send and retrieve. Nordic provides protocol stacks for Bluetooth Low Energy. ANT protocol stacks are available from ANT here: www.thisisant.com.

Power Efficiency

The nRF52832 SoC is an extremely power efficient device that can run from a supply between 1.7V and 3.6V. All individual peripherals and clocks offer complete flexibility of power down when not required for task operation thus minimizing power consumption to a minimum. The IC has a comprehensive system of automated and adaptive power management features. These features range across the entire IC’s operation from power supply switching to peripheral bus/EasyDMA memory management, to automated shut down of all but the absolute essential peripherals required to perform a task.

On-chip NFC tag

NFC™-A tag support is included on chip. Out-of-Band (OOB) pairing using NFC simplifies the process of authenticated pairing between two Bluetooth devices by exchanging authentication information over an NFC link.

Package options

The nRF52832 is available in 6x6mm 48-pin QFN packages and 3.0x3.2mm ultra-compact wafer-level chip-scale packages (WL-CSP).

SoftDevice

The nRF52832 is supported by the S132 SoftDevice, a Bluetooth 5 pre-qualified protocol stack. Click for more information on nRF52 Series in our Infocenter

FEATURES

Single chip, highly flexible, 2.4 GHz multi-protocol SoC

32-bit ARM Cortex-M4F Processor

1.7v to 3.6v operation

512kB flash + 64kB RAM

Supports concurrent Bluetooth low energy/ANT protocol operation

On-chip NFC tag for Out-of-Band (OOB) pairing

Up to +4dBm output power

-96dBm sensitivity, Bluetooth low energy

Thread safe and run-time protected

Event driven API

On air compatible with nRF24L and nRF24AP series

2 data rates (2Mbps/1Mbps)

PPI - maximum flexibility for power-efficient applications and code simplification

Automated power management system with automatic power management of each peripheral

Configurable I/O mapping for analog and digital I/O

3 x Master/Slave SPI

2 x Two-wire interface (I²C)

UART (RTS/CTS)

3 x PWM

AES HW encryption

12-bit ADC

Real Time Counter (RTC)

Digital microphone interface (PDM)

On-chip balun

APPLICATIONS

Internet of Things (IoT)

Wearables

SmartHome sensors

Connected white goods

Computer peripherals

Voice-command smart remotes

A4WP ‘Rezence’ wireless charging

Beacons

Sports and fitness sensors and hubs

Connected health products

Smart watches

RC Toys

Interactive games

Building automation and sensor networks