All rights reserved.
Reproduction in whole or in part is prohibited without the prior written permission of the copyright holder.
January 2009
nRF24LU1+
Single Chip 2.4GHz Transceiver with USB
Microcontroller and Flash Memory
Product Specification v1.0
Key Features
• nRF24L01+ compatible RF transceiver
• Worldwide 2.4GHz ISM band operation
• Up to 2Mbps on air data rate
• Enhanced ShockBurst™ hardware link layer
• Air compatible with nRF24LU1, nRF24LE1,
nRF24L01+, nRF24L01, nRF2401A, nRF2402,
nRF24E1 and nRF24E2
• Low cost external ±60ppm 16MHz crystal
• Full speed USB 2.0 compliant device controller
• Up to 12 Mbps USB transfer rate
• 2 control, 10 bulk/interrupt and 2 ISO endpoints
• Dedicated 512 bytes endpoint buffer RAM
• Software controlled pull-up resistor for D+
• PLL for full-speed USB operation
• Voltage regulator, 4.0 to 5.25V supply range
• Enhanced 8-bit 8051 compatible
microcontroller
• Drop-in compatibility with nRF24LU1
• Reduced instruction cycle time
• 32-bit multiplication-division unit
• 16 or 32 kbytes of on-chip flash memory
• 2 kbytes of on-chip SRAM
• 6 general purpose digital input/output pins
• Hardware SPI slave and master, UART
• 3 16-bit timers/counters
• AES encryption/decryption co-processor
• Supports firmware upgrade over USB
• Supports FS2 hardware debugger
• Compact 32-pin 5x5mm QFN package
Applications
• Compact USB dongles for wireless
peripherals
• USB dongles for mouse, keyboards and
remotes
• USB dongle 3-in-1 desktop bundles
• USB dongle for advanced media center
remote controls
• USB dongle for game controllers
•Toys
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nRF24LU1+ Product Specification
Liability disclaimer
Nordic Semiconductor ASA reserves the right to make changes without further notice to the product to
improve reliability, function or design. Nordic Semiconductor ASA does not assume any liability arising out
of the application or use of any product or circuits described herein.
All application information is advisory and does not form part of the specification.
Limiting values
Stress above one or more of the limiting values may cause permanent damage to the device. These are
stress ratings only and operation of the device at these or at any other conditions above those given in the
specifications are not implied. Exposure to limiting values for extended periods may affect device reliability.
Life support applications
These products are not designed for use in life support appliances, devices, or systems where malfunction
of these products can reasonably be expected to result in personal injury. Nordic Semiconductor ASA cus-
tomers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Nordic Semiconductor ASA for any damages resulting from such improper use or sale.
Contact details
For your nearest dealer, please see www.nordicsemi.no
Main office:
Otto Nielsens vei 12
7004 Trondheim
Phone: +47 72 89 89 00
Fax: +47 72 89 89 89
www.nordicsemi.no
Data sheet status
Objective product specification This product specification contains target specifications for product
development.
Preliminary product specification This product specification contains preliminary data; supplementary
data may be published from Nordic Semiconductor ASA later.
Product specification This product specification contains final product specifications. Nordic
Semiconductor ASA reserves the right to make changes at any time
without notice in order to improve design and supply the best possible
product.
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nRF24LU1+ Product Specification
Revision History
Attention!
Date Version Description
January 2009 1.0
Observe precaution for handling
Electrostatic Sensitive Device.
HBM (Human Body Model): Class 1C
CDM (Charged Device Model): Class IV
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nRF24LU1+ Product Specification
Contents
1 Introduction ............................................................................................... 12
1.1 Prerequisites ........................................................................................ 12
1.2 Writing conventions.............................................................................. 12
1.3 Features ............................................................................................... 13
1.4 Block diagram ...................................................................................... 14
1.5 Typical system usage........................................................................... 15
2 Pin Information.......................................................................................... 16
2.1 Pin Assignments .................................................................................. 16
2.2 Pin Functions ....................................................................................... 17
2.2.1 Antenna pins.................................................................................... 17
2.2.2 USB pins.......................................................................................... 17
2.2.3 Power supply pins ........................................................................... 17
2.2.4 PROG pin ........................................................................................ 17
2.2.5 Reference current pin ...................................................................... 18
2.2.6 Port pins .......................................................................................... 18
2.2.7 External RESET Pin ........................................................................ 18
2.2.8 Crystal oscillator pins....................................................................... 18
3 Absolute Maximum Ratings ..................................................................... 19
4 Operating Conditions ............................................................................... 20
5 Electrical Specifications........................................................................... 21
5.1 Power consumption and timing characteristics .................................... 21
5.2 RF transceiver characteristics............................................................. 22
5.3 USB interface ....................................................................................... 25
5.4 Flash memory ...................................................................................... 25
5.5 Crystal specifications ........................................................................... 26
5.6 DC Electrical Characteristics................................................................ 26
6 RF Transceiver .......................................................................................... 28
6.1 Features ............................................................................................... 28
6.2 Block diagram ...................................................................................... 29
6.3 Functional description .......................................................................... 29
6.3.1 Operational Modes .......................................................................... 29
6.3.1.1 State diagram ............................................................................... 29
6.3.1.2 Power down mode........................................................................ 30
6.3.1.3 Standby modes ............................................................................ 30
6.3.1.4 RX mode ...................................................................................... 31
6.3.1.5 TX mode....................................................................................... 31
6.3.1.6 Operational modes configuration ................................................. 32
6.3.1.7 Timing information........................................................................ 32
6.3.2 Air data rate ..................................................................................... 33
6.3.3 RF channel frequency ..................................................................... 33
6.3.4 Received Power Detector measurements ....................................... 33
6.3.5 PA control ........................................................................................ 33
6.3.6 RX/TX control .................................................................................. 34
6.4 Enhanced ShockBurst™ ...................................................................... 34
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nRF24LU1+ Product Specification
6.4.1 Features .......................................................................................... 34
6.4.2 Enhanced ShockBurst™ overview .................................................. 34
6.4.3 Enhanced Shockburst™ packet format ........................................... 35
6.4.3.1 Preamble ...................................................................................... 35
6.4.3.2 Address ........................................................................................ 35
6.4.3.3 Packet Control Field ..................................................................... 36
6.4.3.4 Payload ........................................................................................ 36
6.4.3.5 CRC (Cyclic Redundancy Check) ................................................ 37
6.4.4 Automatic packet assembly............................................................. 38
6.4.5 Automatic packet disassembly ........................................................ 39
6.4.6 Automatic packet transaction handling............................................ 40
6.4.6.1 Auto Acknowledgement................................................................ 40
6.4.6.2 Auto Retransmission (ART).......................................................... 40
6.4.7 Enhanced ShockBurst flowcharts.................................................... 42
6.4.7.1 PTX operation .............................................................................. 42
6.4.7.2 PRX operation .............................................................................. 44
6.4.8 MultiCeiver™ ................................................................................... 45
6.4.9 Enhanced ShockBurst™ timing....................................................... 47
6.4.10 Enhanced ShockBurst™ transaction diagram................................. 50
6.4.10.1 Single transaction with ACK packet and interrupts ...................... 51
6.4.10.2 Single transaction with a lost packet ............................................ 51
6.4.10.3 Single transaction with a lost ACK packet.................................... 52
6.4.10.4 Single transaction with ACK payload packet................................ 52
6.4.10.5 Single transaction with ACK payload packet and lost packet....... 53
6.4.10.6 Two transactions with ACK payload packet and the first
ACK packet lost .......................................................................... 53
6.4.10.7 Two transactions where max retransmissions is reached............ 54
6.4.11 Compatibility with ShockBurst™...................................................... 54
6.4.11.1 ShockBurst™ packet format......................................................... 54
6.5 Data and control interface .................................................................... 55
6.5.1 SFR registers................................................................................... 55
6.5.2 SPI operation................................................................................... 56
6.5.2.1 SPI commands ............................................................................. 56
6.5.3 Data FIFO........................................................................................ 57
6.5.4 Interrupt ........................................................................................... 58
6.6 Register map........................................................................................ 59
6.6.1 Register map table .......................................................................... 59
7 USB Interface............................................................................................. 65
7.1 Features ............................................................................................... 65
7.2 Block diagram ...................................................................................... 66
7.3 Functional description .......................................................................... 67
7.4 Control endpoints ................................................................................. 71
7.4.1 Control endpoint 0 implementation.................................................. 71
7.4.2 Endpoint 0 registers ........................................................................ 72
7.4.3 Control transfer examples ............................................................... 73
7.4.3.1 Control write transfer example ..................................................... 73
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