Description

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 the building of robust network nodes with a very low total bill-of-material cost. The CC2541 combines the exceptional 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 features and peripherals. The CC2541 is highly suited for systems requiring ultra-low power consumption. 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 x 6-mm QFN-40 package if the USB on the CC2540 is not used and the I2C/extra I/O on the CC2541 is not used. Compared to the CC2540, the CC2541 offers lower RF current consumption. The CC2541 does not have the USB interface that the CC2540 has and offers lower maximum output power in TX mode. The CC2541 also adds one HW I2C interface. The CC2541 is pin-compatible with the CC2533, an optimized RF4CE IEEE 802.15.4 SoC. The CC2541 comes in two different versions: CC2541F128/F256, with 128-kB and 256-kB flash memory, respectively. See the CC2541 block diagram.

Features：

• RF

• 2.4-GHz Bluetooth low energy compliant and proprietary RF system-on-chip

• Supports data rates of 250-kbps, 500-kbps, 1-Mbps, 2-Mbps

• Excellent link budget, enabling long-range applications without an 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

• Very few external components

• Reference design provided

• 6-mm × 6-mm QFN-40 package

• Pin-compatible with CC2540 (when USB or I2C is not used)

• 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

• Extended baseband automation, including automatic acknowledgement and address decoding

• Retention of all relevant registers in all power modes

• Peripherals

• Powerful 5-channel DMA

• General-purpose timers (one 16-bit, two 8-bit)

• IR generation circuit

• 32-kHz sleep timer with capture capability

• Accurate digital RSSI support

• Battery monitor and temperature sensor

• 12-bit ADC with 8 channels and configurable resolution

• AES security coprocessor

• Two powerful UARTs supporting several serial protocols

• 23 general-purpose I/O pins (21 × 4 mA, 2 × 20 mA)

• I2C interface

• Two I/O pins with LED drive capability

• Watchdog timer

• Integrated high-performance comparator

• Development Tools

• CC2541 Evaluation Module Kit (CC2541EMK)

• CC2541 Mini Development Kit (CC2541DK-MINI)

• SmartRF™ software

• IAR Embedded Workbench™ provided

Software Features

• Full Bluetooth low energy (BLE) software stack compliant with v4.0 for single-mode BLE solutions

• Fully power-optimized stack, including controller and host

• GAP – central device, peripheral, or broadcaster (including combo roles)

• ATT / GATT – client and server

• SMP – AES-128 encryption and decryption

• L2CAP

• Sample applications and profiles

• General applications for GAP central and peripheral roles

• Proximity, accelerometer, simple key, and battery GATT services

• Additional applications supported within the BLE software stack

• Multiple configuration options

• Single-chip configuration, allowing the application to run on the CC2541

• Network processor interface for running on an external microprocessor

• BTool – Windows PC application for evaluation, development, and testing