TI 公司的CC2540F128/256是2.4GHz单片低功耗蓝牙系统级芯片，集成了带增强性能的工业标准8051 MCU的RF收发器，在系统可编程的闪存，8KB RAM，以及其它特性和外设。主要用于消费类电子，医疗设备，手机配件，运动和休闲设备以及人机接口设备等。本文介绍了CC2540F128/256主要特性，方框图，应用电路图和外接元件表 CC2540F128, CC2540F256：2.4-GHz Bluetooth® low energy System-on-Chip The CC2540 is a cost-effective, low-power, true system-on-chip (SoC) for Bluetooth low energy applications. It enables robust BLE master or slave nodes to be built with very low total bill-of-material costs. The CC2540 combines an excellent 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 CC2540 is suitable for systems where very low power consumption is required. Very low-power sleep modes are available. Short transition times between operating modes further enable low power consumption. The CC2540 comes in two different versions: CC2540F128/F256, with 128 and 256 KB of flash memory, respectively. Combined with the Bluetooth low energy protocol stack from Texas Instruments, the CC2540F128/F256 forms the market’s most flexible and cost-effective single-mode Bluetooth low energy solution. CC2540F128/256主要特性： 图1。CC2540F128/256方框图 图2。CC2540应用电路图 应用电路图外接元件表（不包括电源去耦电源）： CC2540EM参考设计 The CC2540EM reference design contains schematics and layout files for the CC2540EM module. The reference design demonstrates good techniques for CC2540 decoupling and RF layout. For optimum RF performance, the reference design should be copied accurately. This is a 4-layer reference design with an SMA antenna connector for RF output matched to 50 ohm. 图3。CC2540EM参考设计电路图