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1.1 Features 1

? RF

– 2.4-GHz Bluetooth Low Energy Compliant and

Proprietary RF Wireless MCU

– Supports Data Rates of 250 kbps, 500 kbps, 1

Mbps, and 2 Mbps

– 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

– 6 mm × 6 mm QFN-40 Package

? Low Power

– Active-Mode RX Down to: 18.3 mA

– Active-Mode TX (0 dBm): 18.6 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 to 3.6 V)

? Microcontroller

– High-Performance and Low-Power 8051

Microcontroller Core With Code Prefetch

– 256KB In-System Programmable Flash

– 8KB of 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

– IR Generation Circuitry

– General-Purpose Timers (One 16-Bit, Two 8-Bit)

– 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-Performance Comparator

? Development Tools

– CC2541 Evaluation Module

– SmartRF? Software

– IAR Embedded Workbench? Available

? Bluetooth v4.0 Compliant Protocol Stack for Single-Mode BLE Solution

– Complete Power-Optimized Stack, Including

Controller and Host

? GAP – Central, Peripheral, Observer, or

Broadcaster (Including Combination Roles)

? ATT / GATT – Client and Server

? SMP – AES-128 Encryption and Decryption

? L2CAP

– 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-Q1

? Network Processor Interface for Applications

Running on an External Microcontroller

– BTool–Windows PC Application for Evaluation,

Development, and Test

– Over the Air Update Capable

1.2 Applications

? 2.4-GHz Bluetooth Low-Energy Systems

? Proprietary 2.4-GHz Systems

? Keyless Entry (Passive and Remote)

? Tire Pressure Monitoring

? Proximity Sensing

? Interface and Control

? Diagnostics and Maintenance

? Cable Replacement

? Sensor Nodes

? Infotainment and Media

? Smart Phone Connectivity

? Beacons

1.3 Description

The CC2541-Q1 is a power-optimized true Wireless MCU solution for both Bluetooth low energy and

proprietary 2.4-GHz applications. This device enables the building of robust nework nodes with low total

bill-of-material costs. The CC2541-Q1 combines the excellent performance of a leading RF transceiver

with an industry-standard enhanced 8051 MCU, in-system programmable flash memory, 8KB of RAM, and

many other powerful supporting features and peripherals. The CC2541-Q1 is highly suited for systems in

which ultralow power consumption is required, which is specified by various operating modes. Short

transition times between operating modes further enable low power consumption.

The CC2541-Q1 comes in a 6 mm x 6 mm QFN40 package.