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[原创] TI CC2541低功耗蓝牙智能遥控方案

关键词:蓝牙 Bluetooth 手机配件 消费类电子 TI CC2541

时间:2015-01-21 13:50:54       作者:TI       来源:中电网

TI公司的CC2541是功率优化的真正系统级芯片(SoC)解决方案,适用于蓝牙低功耗和专用的2.4GHz应用.器件集成了极好性能的RF收发器和工业标准增强性8051 MCU,在系统编程的闪存,8K RAM和许多功能强大的支持特性和外设,支持250kbps,500 kbps,1Mbps和2 Mbps数据速率,RF输出功率可编至0dBm,极好的接收灵敏度(-94dBm at 1 Mbps),主要用在2.4GHz蓝牙低功耗系统,专用的2.4GHz系统,人机接口如键盘,鼠标和遥控),体育和休闲设备,手机配件和消费类电子.本文介绍了CC2541主要特性,框图,应用电路,以及低功耗蓝牙智能遥控板特性,电路图和材料清单.

The CC2541 is a power-optimized true system-on-chip (SoC) solution for both Bluetooth low energy and proprietary 2.4-GHz applications. It enables robust network nodes to be built with low total bill-of-material costs. The CC2541 combines the excellent performance of a leading RF transceiver with an industry-standard enhanced 8051 MCU, in-system programmable flash memory, 8-KB RAM, and many other powerful supporting features and peripherals.

The CC2541 is highly suited for systems where ultralow power consumption is required. This is specified by various operating modes. Short transition times between operating modes further enable low power consumption. The CC2541 is pin-compatible with the CC2540 in the 6-mm × 6-mm QFN40 package, if the USB is not used on the CC2540 and the I2C/extra I/O is not used on the CC2541. Compared to the CC2540, the CC2541 provides lower RF current consumption. The CC2541 does not have the USB interface of the CC2540, and provides lower maximum output power in TX mode. The CC2541 also adds a HW I2C interface. The CC2541 is pin-compatible with the CC2533 RF4CE-optimized IEEE 802.15.4 SoC.

The CC2541 comes in two different versions: CC2541F128/F256, with 128 KB and 256 KB of flash memory, respectively.

CC2541主要特性:
RF
2.4-GHz Bluetooth low energy Compliant and Proprietary RF System-on-Chip
Supports 250-kbps, 500-kbps, 1-Mbps, 2-Mbps Data Rates
Excellent Link Budget, Enabling Long-Range Applications Without External Front End
Programmable Output Power up to 0 dBm
Excellent Receiver Sensitivity (–94 dBm at 1 Mbps), Selectivity, and Blocking Performance
Suitable for Systems Targeting Compliance With Worldwide Radio
Frequency Regulations: ETSI EN 300 328 and EN 300 440 Class 2 (Europe),
FCC CFR47 Part 15 (US), and ARIB STD-T66 (Japan)
Layout
Few External Components
Reference Design Provided
6-mm × 6-mm QFN-40 Package
Pin-Compatible With CC2540 (When Not Using USB or I2C)
Low Power
Active-Mode RX Down to: 17.9 mA
Active-Mode TX (0 dBm): 18.2 mA
Power Mode 1 (4-µs Wake-Up): 270 µA
Power Mode 2 (Sleep Timer On): 1 µA
Power Mode 3 (External Interrupts): 0.5 µA
Wide Supply-Voltage Range (2 V–3.6 V)
TPS62730 Compatible Low Power in Active Mode
RX Down to: 14.7 mA (3-V supply)
TX (0 dBm): 14.3 mA (3-V supply)
Microcontroller
High-Performance and Low-Power 8051 Microcontroller Core
With Code Prefetch
In-System-Programmable Flash, 128- or 256-KB
8-KB RAM With Retention in All Power Modes
Hardware Debug Support
Extensive Baseband Automation, Including Auto-Acknowledgment
and Address Decoding
Retention of All Relevant Registers in All Power Modes
Peripherals
Powerful Five-Channel DMA
General-Purpose Timers (One 16-Bit, Two 8-Bit)
IR Generation Circuitry
32-kHz Sleep Timer With Capture
Accurate Digital RSSI Support
Battery Monitor and Temperature Sensor
12-Bit ADC With Eight Channels and Configurable Resolution
AES Security Coprocessor
Two Powerful USARTs With Support for Several Serial Protocols
23 General-Purpose I/O Pins
(21 × 4 mA,2 × 20 mA)
I2C interface
2 I/O Pins Have LED Driving Capabilities
Watchdog Timer
Integrated High-PerformanceComparator
Development Tools
CC2541 Evaluation Module Kit (CC2541EMK)
CC2541 Mini Development Kit (CC2541DK-MINI)
SmartRF™ Software
IAR Embedded Workbench™ Available
Software Features
Bluetooth v4.0 Compliant Protocol Stack for Single-Mode BLE
Solution
Complete Power-Optimized Stack, Including Controller and
HostGAP – Central, Peripheral, Observer, or Broadcaster
(Including Combination Roles)ATT / GATT – Client and ServerSMP –
AES-128 Encryption and DecryptionL2CAP
Sample Applications and Profiles
Generic Applications for GAP Central and Peripheral Roles
Proximity, Accelerometer, Simple Keys, and Battery GATT Services
More Applications Supported in BLE Software Stack
Multiple Configuration Options
Single-Chip Configuration, Allowing Applications to Run on CC2541
Network Processor Interface for Applications Running on an External
Microcontroller
BTool – Windows PC Application for Evaluation, Development, and Test

CC2541应用:

2.4-GHz Bluetooth low energy Systems
Proprietary 2.4-GHz Systems
Human-Interface Devices (Keyboard, Mouse, Remote Control)
Sports and Leisure Equipment
Mobile Phone Accessories
Consumer Electronics

图1. CC2541框图

图2. CC2541典型应用电路图

CC2541低功耗蓝牙智能遥控板

The CC2541 Bluetooth Smart Remote Control Kit provides a reference platform for Bluetooth low energy remote control application development. It is based on the TI’s industry leading CC2541 Bluetooth low energy device and contains the hardware and tools required for evaluating, developing, testing, and debugging remote control applications.

The kit includes an advanced programmable remote control capable of 6-axis motion sensing (3-axis accelerometer and 3-axis gyroscope), a USB dongle and a debugger.

The advanced remote and USB dongle come pre-programmed with their respective HID-over-GATT profile roles and HID report service, including keyboard, consumer control keys and mouse reports. The sample applications are included in the Bluetooth low energy software stack.

The advanced remote control can connect directly to a Bluetooth® Smart Ready device supporting HID-over-GATT, e.g. Windows 8. The USB dongle can be used as a bridge to interface to devices without Bluetooth® Smart Ready support, e.g. Windows 7.

The CC2541 Advanced Remote Control is designed to act as a HID Peripheral Device (BLE Slave),operating according to the specifications laid out in the HID over GATT profile [5]. It comes pre-assembled in plastic casing with rubber buttons, battery enclosure and a hole to access the programming header.

The Advanced Remote Control operates on three 1.5V alkaline AAA (LR03) batteries. Available peripheral hardware on the board includes a buzzer, gyroscope, accelerometer and shift registers for key scanning.

The PCB design also includes a 3.3V LDO (TPS78330) to lower the voltage from a maximum 4.5 Volt to 3.3 Volt for use by the integrated circuits.

The CC2540 USB Dongle can be used to emulate any Bluetooth low energy behavior but is usually acting as a Central Device (BLE Master) and HID Host. In this kit it comes pre-loaded with firmware that acts in a Central role and as a HID Service client towards the Advanced Remote Control and sends received input data to emulated Human Interface Devices (USB HID) on a connected Windows, Linux or OSX computer.

The CC Debugger is used to flash the software onto both the USB Dongle as well as the Advanced Remote Control. It can also be used for debugging software using IAR Embedded Workbench.The RF Boards in this kit are FCC and IC certified and tested to comply with ETSI/R&TTE over temperature from 0 to +35°C.

CC2541蓝牙智能遥控板包括:

The kit contains:
1 x CC2541 Advanced Remote Control
1 x CC2540 USB Dongle
1 x CC Debugger
3 x 1.5V AAA Alkaline Batteries
Documentation

图3. CC2541蓝牙智能遥控板外形图

图4. CC2541蓝牙智能遥控板电路图
CC2541蓝牙智能遥控板材料清单:



详情请见:
http://www.ti.com/lit/ds/symlink/cc2541.pdf
http://www.ti.com/lit/ug/swru343/swru343.pdf
以及http://www.ti.com/lit/df/tidr194/tidr194.pdf
http://www.ti.com/lit/df/tidr193/tidr193.pdf

cc2541.pdf
swru343.pdf
tidr193.pdf
tidr194.pdf

 

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