Remote Control Reference Design nRD24H1 User Guide
Contents
1. 8 E Pete 3 5 P AUR ISP gC t 1 9 3 6U uu BC Jc 28 2 8 gt 0 80 V 1 8 52 23888388388 Nordic Semiconductor y nRD24H1 APPBOARD A Figure 9 Application board top overlay Figure 10 Application board bottom layer Revision 1 0 Page 19 of 21 NORDI User Guide SEMICONDUCTOR 5 6 Design layout for USB receive dongle 17 Figure 13 USB receive dongle bottom layer Revision 1 0 Page 20 of 21 NORDI User Guide SEMICONDUCTOR 5 7 Design layout for the RF module Figure 14 RF module top layer 39 SCK MISO 5 PC4 peg Ji ean J10 TE JL ul 71 su m Ha 90 012 e 1100 ny J ci V a TNGONAY a n Li S m 26 PD4 PB6 PDS PDS PB2 J24 a Figure 15 RF module top overlay Figure 16 RF module bottom layer Revision 1 0 Page 21 of 212. 1 2 3 4 vec LEDI RI b PD6 100R LED R E PD7 100R P3 PD7 51 Vol PCO SUA PB2 PD6 6 PDS S ST PB6 ES PDA 12 PC3 52 Vol 9 10 P PBS SCK EDI 12 o CA PBA MISO 75 PCORST jor PB3 MOS vec PB3 MOSI PBI MOST 7 PC2 TT PBS SCK BT2 BTI P4 PBA MISO PCS 83 Play 123 PC4 ve PCI Hio pps EBS P 1 19 20 PCO 2 22 ero PCI n 2XAAA 2XAAA El T M AVRIS es 2 no aon gt GND GND PCT iu BOS GND GND GND S5 Forward PBS SCK in TEAS PDI For component bottom side PD3 ns mount Only one battery box is PD4 2 connected m S6 Back 121 EDS 322 o PD7 Pr 19 PS p GND at GND GND ala o ER SCL TD E SDA 4 is NA NA To be used only as pull ups for I2C Title nRD24H1 APPBOARD A uu NORDIC A Date 15 12 2006 Shet of 1 File _nRD24H1 APPBOARD A SchDoc Drawn By N 3 Page 16 of 21 Revision 1 0 Remote Control Reference Design 5 3 USB receive dongle schematics Bee nva 41 gsn
3. 91001 WOOL ji P pa 7 EE m 85 8 5 gt _ ge Z R E RE S ER Ex B 28 go A 8 5 B 5 2 8 E 3 58 5 zx 5 gez z BED 8 B B 2 Revision 1 0 Page 17 of 21 User Guide RF module schematics 5 4 VDD l cio 10uF PCL INTI OC PD4 TO XCK PCB Antenna Ul nRF24LOI 1 8 20H 4 Title nRD24H1 RFMODULE A Size N NORDIC Project Number Revision A 2006 Sheet 1 of 1 24 1 RFMODULE A SchDoc DrawnBy Page 18 of 21 Revision 1 0 Remote Control Reference Design D SEMICONDUCTOR 5 5 Design layout for application board Figure 8 Application board top layer
4. SPI slave select for the MCU in case devices on your custom Application Board need this communication mode with the MCU For more information please consult the Atmel datasheet The RF module has an operating range from 1 9 to 3 6V Revision 1 0 Page 7 of 21 D User Guide SEMICONDUCTOR 3 1 1 Specifications Supply voltage 1 9 3 6 V Current consumption Idle ROA with brownout detection at V supply 1 2uA without brownout detection Peak current 15 mA peak at 3 V supply Radio frequency 2402 2478 MHz Output power 0 dBm Table 2 Electrical Specifications PCB type 1 6 mm 2 layer FR4 PCB dimension Length x width x height 39 mm x 17 mm x 1 6 mm Table 3 Physical Specifications 3 2 Application Board While the RF module can be used as is in a vast number of applications the application board is made with redesign in mind It is hard to anticipate all the different form factors that end products based on nRD24H1 may have But the most likely hardware differences will be in casing button placement display design and power management We have not considered the casing design at all but the rest of the appli cation board should be very easy to redesign The Application board that ships with nRD24H1 contains the following units Footprint for the RF module Six buttons Batteries External power connector Programming header for the MCU on the RF module
5. SEMICONDUCTOR Remote Control Reference Design nRD24H1 User Guide All rights reserved Reproduction in whole or in part is prohibited without the prior written permission of the copyright holder December 2006 NORDI User Guide 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 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 http www nordicsemi no Receive available updates automatically by subscribing to eNews from our homepage or check our web site regularly for any available updates Main office Otto Nielsen s vei 12 7004 Trondheim Phone 47 72 89 89 00 Fax 447 72 89 89 89 www nordicsemi no ACORELITATION 03 NS EN ISO 9001 CERTIFICATED amp FIRM Revision History December 2006 1 0
6. 18 5 VOL UP SCL 19 4 VOL DOWN SDA 20 PC1 21 GND 22 GND Table 5 pinout 1 PDO RX data 2 PC5 SCL 3 PD1 data 4 PC4 SDA Table 6 P2 pinout Revision 1 0 Page 9 of 21 NORDIC User Guide SEMICONDUCTOR 3 3 USB Receive Dongle The USB receive dongle should not need hardware redesign in most applications The USB receive don gle features the nRF24L01 with the same supporting components as on the RF module The USB interface is provided by a Silicon Laboratories 8051 321 IC This IC also acts as an MCU running the remote con trol signal reception application Figure 4 USB receive dongle The nRF24L01 requires a supply voltage of between 1 9 and 3 6V The C8051F321 features a voltage reg ulator that takes 5V from the USB connector and provides to the rest of the USB receive dongle The bottom side of the USB receive dongle has one button and the top side has one LED These two com ponents are not important in nRD24H1 but have been included in case your application needs them The C8051F321 uses an internal timer for waking up the MCU when the PC is in a suspended mode The frequency of this timer is controlled by the value of the cap C12 connected to pin 0 2 of the MCU Programming the C8051F321 is done with a ISP programmer from SiLabs The programming details for this are explained in the software guide Revision 1 0 Page 10 of 21 Remote Control Ref
7. 1 Introduction nRD24H is a reference design for the nRF24L01 general purpose radio chip The purpose of this docu ment is to help with the design of RF based remote controls operating in the worldwide 2 4GHz ISM band Based on this reference design you will be able to design one way and two way remote controls that are not limited by line of sight conditions This reference design also provides valuable design suggestions for other applications with comparable data rates 2 System Overview The reference design consists of complete design files schematics layout Gerber BOM data and source code for a USB receive dongle an RF module and an application board The remote control unit consists of the RF module and application board The RF module contains all critical parts and the application board is easily redesigned for the form factor of the finished product MOSI gt 4 5 SCK gt MCU CSN gt 24101 CE gt INT Buttons or I O Figure 1 Block diagram of the remote control unit The USB receive dongle may be used as is with no hardware changes The USB receive dongle and remote control unit are not supplied with plastic housing MOSI 4 MSO gt lt USB MCU CSN nHF24LO1 CE Figure 2 Block diagram of the USB receive dongle You can download the design files from Nordic Semiconductor at www nordicsemi no
8. Revision 1 0 Page 2 of 21 Remote Control Reference Design SE MICONDUCTOR Contents 1 c 4 2 System OV COW PR 4 3 Hardware 6 3 1 agis mc 6 3 1 1 MR 8 3 2 PppliCallon BO8t ux ri M D ME RU 8 3 3 USB Receive 2 10 3 3 1 11 3 4 nRF24L01 Samples 11 4 Hardware Design 00 12 4 1 T 12 4 2 Application Board DD 12 4 3 USB Receive 13 5 sse det 14 5 1 Bill Of Materials 14 5 2 Application board schematics teen 16 5 3 USB receive dongle schematics 2 17 5 4 RF mod le Schematic Sissies aa 18 5 5 Design layout for application 19 5 6 Design layout for USB receive dongle 20 5 7 Design layout for the RF 21 Revision 1 0 Page 3 of 21 D User Guide SEMICONDUCTOR
9. Revision 1 0 Page 4 of 21 Remote Control Reference Design N 0 R D SEMICONDUCTOR is assumed that the USB receive dongle is permanently on while the PC it is plugged into is on The USB receive dongle goes to a low power mode when the PC is in standby Only the remote control unit is opti mized for long battery life Revision 1 0 Page 5 of 21 ORD C User Guide 3 Hardware Description This section describes the hardware units that are supplied with the nRD24H1 3 1 HF Module In most applications redesigning the RF module is not required The RF module includes the nRF24L01 radio IC and all its supporting components that is antenna matching network and crystal The RF module also contains a microcontroller The circumference of the RF module holds GPIO pins of the MCU The choice of pins enables the RF module to support several different standards 14 pins for matrix scan of 49 keyboard buttons 1 LED output SPI master interface 14 GPIO pins Two GPIO pins may alternatively be used for a 2 wire interface master or slave Two GPIO pins may alternatively be used for a UART interface PCB antenna Radio passives RF Module 88 84 Fi ae Figure 3 RF module The nRF24L01 radio IC uses a differential antenna interface for both receive and transmit Connected to this interface are a balun balanced unbalanced and a matching network The nRF24L01 needs very few external c
10. 603 8 2nH L1 04025 Chip inductor 5 2 7nH L2 0402s Chip inductor 5 3 9nH L3 04025 Chip inductor 5 USB Type P1 USB through hole Molex 47037 0001 Header 1x4 P2 IHDR1X4 1M H1 0402s 1M 5 22k R2 04025 22k 1 1k R3 R4 0402s 5 100R R5 0402s 100R NA H6 0402s NA ALPS SKHUAD 61 ALPS SKHUAD nRF24L01 U1 QFN20L 4x4 Nordic Semiconductor C8051F 321 U2 MLP 28 SiLabs 16MHz X1 ITSX 4025 16MHz CL 9pF 60ppm Figure 6 USB receiver dongle BOM Revision 1 0 Page 14 of 21 Remote Control Reference Design SEMICO NDUCTOR 15pF m C2 0402 15pF 2 2 2nF C3 0402 2 2nF X7R 10 4 7pF C4 0402 4 7pF NPO 0 25nF 1 5pF C5 0402 1 5pF NPO 0 1nF 1 0pF C6 C14 0402 1 0pF NPO 0 1nF 33nF C7 0402 X7R 10 1nF C8 0402 X7R 10 10nF C9 0402 10nF X7R 10 10uF C10 1206 6 3V Tantal 100nF C11 C12 C13 C15 0402 100nF X7R 10 8 2nH L1 0402 hip inductor 5 2 7nH L2 0402 hip inductor 5 6 8nH L3 0402 hip inductor 5 1M R1 0402 1M 5 22k R2 0402 22K 1 nRF24L01 U1 QFN20L 4x4 Nordic Semiconductor atMega88V 10MU 02 QFN32L 5x5 Atmel 16MHz X1 SX 4025 16MHz CL 9pF 60ppm Figure 7 RF module BOM Revision 1 0 Page 15 of 21 User Guide Application board schematics 5 2
11. Two LEDs Debug pins for application development The power switch S7 can be used in conjunction with the batteries or the external power connector You should use either batteries or external power External power on batteries off is selected with the switch pointing down while batteries on external power off is selected with the switch pointing up Note It is important to keep the voltage supply within the 1 9 to 3 6V limits There is no over voltage protection circuitry on the Application board P1 is the ISP6PIN connector used to reprogram Atmel MCUs and has the standard Atmel 6 pin ISP pinout P2 contains the GPIO pins that may also work as UART and 2 wire interface The pin names on the debug connector P3 are according to Atmel ATmega88 IO pin names The pins on P1 and P2 are also available on P3 1 MISO 2 3 Revision 1 0 Page 8 of 21 Remote Control Reference Design D 4 MOSI 5 RST 6 GND Table 4 ISP connector P1 The 88 can be programmed with any ISP capable programmer for the Atmel MCUs The ISP con nector P1 has the same pin out as Atmel uses on its programmers that is the STK500 The programming details are explained in the software guide CC 2 PD7 LED2 3 PCO 4 PB2 5 PD6 LED1 6 PD5 BACK 7 PB6 FORWARD 8 PD4 PLAY 9 PD3 STOP 10 PC3 11 PD1 data 12 PDO RX data 13 PC6 RESET 14 PB3 MOSI 15 PC2 16 PB5 SCK 17 4 5
12. erence Design m lt e 25 O 3 3 1 Specifications Supply voltage 4 5 5 5V Current consumption Suspend 450 Connected 25 5 mA Radio frequency 2402 2478 MHz Output power 0 dBm Table 7 Electrical Specifications PCB type 1 6mm 2 layer FR4 PCB dimension Length x width x height 42mm x 15mm x 1 6mm Table 8 Physical Specifications 3 4 nRF24L01 Samples The samples that are supplied with the nRD24H1 are provided so that you can easily start a design using this part The nRD24L01 is a general purpose radio IC operating with very low power consumption More information about this chip can be found on www nordicsemi no Revision 1 0 Page 11 of 21 ORD User Guide 4 Hardware Design Guidelines This chapter describes important issues that might affect you when developing the remote control refer ence design for a finished product 4 1 Module The RF module is designed to cover most remote control and keyboard applications The most likely change to the RF module is that the antenna may need some retuning for your finished application The form factor of the Application board in the end product may influence the radiation pattern The matching network for the nRF24L01 has the same layout as in the reference design from the datasheet with only some small component changes to compensate for the smaller PCB The 50 ohm ref erence poi
13. nt will be between C5 and C14 where C14 is used to match the antenna to this 50 ohm imped ance Note Changing the thickness of the PCB will require a retuning of the antenna matching network In a mass produced product it is likely that the components on the RF module will be merged with the rest of the electronics Also the component cost may be optimized depending on your volumes and needs In such cases we recommend that you use the design files for the RF module and keep the RF portion of the design This includes The nRF24L01 radio and its decoupling The antenna matching network The ground plane pattern between the radio and the antenna The ground vias 4 2 Application Board As stated above the application board is made with redesign in mind and you can redesign it for your prod uct with minimal effort We have identified three likely scenarios 1 For demonstrators a one off application board can be combined with the RF modules sold in the nRD24H1 box 2 For low to mid quantity production you may produce the RF module yourself and mount it on your custom application board 3 For high quantity production merging the electronics on the Application board and RF module will cut production cost For the first two scenarios the modified application board must contain the following basic features in addi tion to your choice of buttons and display The U shaped footprint for the RF module with all the IO
14. omponents A resistor is used for biasing while two small tors are sufficient for decoupling The nRF24L01 also needs an external 16MHz crystal for time reference The radio is tolerant of 60ppm crystals but the RF module is equipped with a 10ppm crystal because this is the most common tolerance for a crystal of this size The Atmel ATmega88 MCU is rich in hardware IO features while consuming little power The MCU on the RF module is programmed from a header on the Application board The MCU has a 4kbyte program mem ory and an internal RC oscillator running on 1MHz Tools from Atmel are necessary to reprogram the MCU Revision 1 0 Page 6 of 21 Remote Control Reference Design 2 Table 1 RF module 2 PD7 LED2 3 PCO RX data 4 PC1 5 4 VOL SDA 6 PC5 VOL UP SCL 7 PB4 MISO 8 PB5 SCK 9 GND 10 PC2 11 PB3 MOSI 12 CC 13 PC6 RESET 14 PDO 15 PD1 data 16 GND 17 PC3 18 PD3 STOP 19 PD4 PLAY 20 PB6 FORWARD 21 PD5 BACK 22 PD6 LED1 23 PB2 24 GND Note The PB2 pin of the Atmel ATmega88 MCU has special functionality This pin may not be used as a general purpose input pin in the current design We recomend that you limit its use to one of the following Not connected as is the case with the present Application Board General purpose output pin for a LED etc SPI slave select for devices on your custom Application Board
15. pads placed on the nRD24H1 Application board Avoltage supply to the RF module in the range between 1 9 to 3 6V A programming header for the Atmel AVR MCU on the RF module Revision 1 0 Page 12 of 21 Remote Control Reference Design D SEMICONDUCTOR 4 3 USB Receive Dongle The USB dongle contains all the components that are necessary for a finished product The matching network for the nRF24L01 has the same layout as in the reference design from the datasheet with only some small component changes to compensate for the smaller PCB The 50 ohm ref erence point will be between C5 and L4 where L4 is used to match the antenna to this 50 ohm impedance The following design alterations are likely to the USB receive dongle Tools from Silicon Laboratories are required to reprogram the USB receive dongle with your soft ware The top side of the USB receive dongle has a 4 pin programming interface for Silicon Labora tories ISP tools The 4 pin connector will likely be omitted from the BOM of a production model The LED and button are placed on the the USB receive dongle If your application does not need these functions it is easy to disregard the components without having to alter the PCB layout Note If you need the button and or LED and find it inconvenient that they are on the bottom side the simplest modification is to turn the USB connector upside down Itis possible to reduce the size of the USB receive dongle by u
16. sing a chip antenna or another antenna configuration choosing a more compact USB connector or altering the layout If you choose to do so the antenna matching network must be redesigned The antenna is matched for best reception when the dongle is placed in a USB slot of a computer and without a plastic housing Adding housing can affect the antenna resulting in the antenna matching needing changed Revision 1 0 Page 13 of 21 N RD C User Guide ON OR SEMICONDUCT 5 Appendix 5 1 Bill Of Materials BOM LED Green LED1 LED2 1206 Led Green 1206 Header 2x6 P 1 Header 2x6 Pin Header 2x6 Header 2x2 P2 Header 2x2 Pin Header 2X2 Header 2x11 P3 Header 2x11 Pin Header 2x11 Screw terminal P4 Phoenix MPT 0 5 2 2 54 P5 NA 100R R1 R2 0402 100R NA R3 R4 0402 NA Switch S1 S2 S3 54 55 SOSKHJAD Alps SKHUAD Switch S7 EAO type 1K2 straigh pins Battery BT1 Battery box Figure 5 Application board BOM 15pF 22 0402s 15pF NPO 2 1 2 2nF E 04025 B 2nF X7R 10 4 7pF 4 0402s 4 7pF NPO 0 25pF 1 5pF C5 0402s 1 5pF NPO 0 1pF 1 0pF C6 C14 0402s 1 0pF NPO 0 1pF 33nF 2 0402s B3nF X7R 10 1nF 8 0402s 1nF 10 10nF C9 0402s 10nF X7R 10 100nF C10 C11 0402s 100nF X7R 10 33pF C12 0402s NPO 5 1uF C13 0402s 6 3V LED GREEN D1 1 6X0 8X0 4 LED GREEN 0
Download Pdf Manuals
Related Search