原标题：TI CC2541蓝牙邮票块参考设计

　　TI公司的CC2541是用于蓝牙低功耗和2.4GHz应用的真正系统级芯片(SoC),器件集成了RF和高性能低功耗8051 MCU内核,支持250kbps, 500kbps, 1Mbps和2Mbps数据速率,可编输出功率高达0dBm,1Mbps时的接收灵敏度–94 dBm,主要用在2.4GHz蓝牙低功耗系统,人机接口如键盘,鼠标和遥控,体验生活和休闲设备,手机和消费类电子.本文介绍了CC2541主要特性,框图和典型应用电路,以及邮票大小的蓝牙模块的参考设计主要特性,电路图,材料清单和PCB元件布局图.

　　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

　　软件特性:

　　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主要应用:

　　• 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应用电路

　　CC2541蓝牙邮票块参考设计

　　The CC2541 Postage Stamp reference design contains the schematics and layout files for the CC2541PS Module. The reference design demonstrates good techniques for CC2541 decoupling and RF layout for a very compact 16.3mm x 13mm PCB . For optimum RF performance, the reference design should be copied accurately. This is a 2-layer PCB reference design using an integrated solution of a Johanson Chip balun(2450BM15A0002) and a Johanson chip antenna(2450AT42A100). The CC2541 Postage stamp is perfect for applications requiring proximity detecting and temperature sensing. It is ideal for proof of concept prototyping on existing systems.

　　CC2541蓝牙邮票块参考设计主要特性:

　　Affordable low cost, 2 layer board design in a compact form factor of 16.3mmX13mm

　　Onboard chip antenna (from Johanson, 2450AT42A100) with integrated balun (from Johanson, 2450BM15A002) matching circuit, with 1 SPI, 1 I2C and 1 USART interface pinout

　　Can be used for proximity sensing, temp data logging, quick prototyping and quick PoC (Proof of Concept) purposes

　　Free schematics, BOM and gerber available online for download

　　图3.CC2541蓝牙邮票块参考设计外形图

　　CC2541蓝牙邮票块参考设计材料清单: