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AUREL 650201515G, Руководство пользователя

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AUREL 650201515G Скачать руководство пользователя страница 3

                                                      

             RTX-24EM-HP

  

                                                                                                    

User guide  

 

The technical characteristics can change without notice. AUR°EL S.p.A doesn’t assume the responsibility to the damages caused by an improper use of the  device. 
 

AUR°EL S.p.A.

 Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY                                                                 12/11/2019 - Rev. A  

Tel.: +390546941124 – Fax: +390546941660                                                                                                                   Page  3 

http://www.aurel.it

  

 

1.  

General description

 

 

The RTX-24EM-HP is a 1.5kbps to 72kbps low-power, low-voltage 2.4GHz ISM band RF transceiver module 
ideal for battery operated wireless applications such as wireless sensors and control.  
The  RTX-24EM-HP  module  embeds  the  EM  Microelectronic  EM9209  Radio  SOC  device.  Furthermore  it 
embeds a power amplifier (PA) and a Low Noise Amplifier (LNA) that allow to increase the RF output power 
and the sensitivity compared to the Aurel RTX-24EM modules. 
The EM9209’s built in custom low power microcontroller supports the proprietary wireless protocol links in 
the license free 2.4000GHz to 2.4835GHz ISM band. It includes a low-IF receiver architecture and uses FSK 
modulation.  A  SPI  interface  provides  a  simple  control  of  the  baseband  using  an  external  host 
microcontroller. 
The EM9209 provides two communication modes with normal sensitivity (NS) or high sensitivity (HS) and 
programmable bit rate from 1.5kbps to 72kbps. 
 
The RTX-24EM-HP module is pin to pin compatible with Aurel new model RTX-24EM and previous models 
XTR CYP 2.4 GHz, XTR VF 2.4 LP, XTR VF 2.4PA-LNA and XTR VF 2.4 HP. 

 

The RTX-24EM-HP module is available in the following variants: 

 

Aurel Code 

Technical name reference 

Description 

650201515G 

AUREL RTX-24EM-HP-AI/H 

Integrated PIFA antenna, horizontal mounting 

650201516G 

AUREL RTX-24EM-HP-AI/V 

Integrated PIFA antenna, vertical mounting 

650201517G 

AUREL RTX-24EM-HP-AE/H 

UFL connector for external antenna, horizontal mounting 

650201518G 

AUREL RTX-24EM-HP-AE/V 

UFL connector for external antenna, vertical mounting 

 

1.1  Features 

 

•

 

Low voltage:   2,0 to 3,6 V 

•

 

RX mode:  

15mA in RX normal sensitivity mode (NS), 16mA in RX high sensitivity mode (HS). 

•

 

TX mode:  

40mA at 10dBm, 100mA at +20dBm. 

•

 

< 2µA in power down mode. 

•

 

High performance: 

 

 

-119dBm sensitivity at 1.5kbps,  

 

 

 

 

Programmable output power up to +20dBm 
 

•

 

Operating temperatures: -20°C to +70°C 

•

 

Flexible  interface: 

 

SPI interface for microcontrollers 

 

Fully programmable link layer 

 
 
 
 
 
 
 

Содержание 650201515G

Страница 1: ...onditions 6 2 Supply currents on Vcc 6 3 RF characteristics 7 Functional modes 7 1 Power Down 7 2 Standby Mode 7 3 RAM2 Init 7 4 Auto cal 7 5 Transmit 7 6 Receive 8 Digital interface 8 1 SPI operation...

Страница 2: ...ing 21 9 6 RF operating frequency 22 9 7 Address byte 22 9 8 TX Power level 23 9 9 Packet TX and RX payload 23 9 9 1 Mode payload size in the header 23 9 9 2 Mode payload size in RAM2 23 9 10 Register...

Страница 3: ...e provides a simple control of the baseband using an external host microcontroller The EM9209 provides two communication modes with normal sensitivity NS or high sensitivity HS and programmable bit ra...

Страница 4: ...er tive low from the external host microcontroller to the radio module forced to low level the device is resetted and in power down mode Master Out Slave In SPI signal from the external host microcont...

Страница 5: ...ource protected against short circuits The usage of the transceiver is foreseen inside enclosures that assure the overcoming of the rule EN 61000 4 2 not directly applicable to the module itself This...

Страница 6: ...elow 5 1 1 Frequency synthesizer Phase Locked Loop PLL The frequency synthesizer provides an accurate low jitter 100 dBc 1MHz offset 2 4GHz RF signal used for both up conversion in Transmit mode and d...

Страница 7: ...configuration ontroller drives an interrupt pin IRQ which can be programmed to indicate the status that a packet has been sent or received or that auto calibration has finished This controller to comp...

Страница 8: ...5 2 1 2 In Auto calibration mode The center frequency of the VCO is tuned for a chosen channel frequency The result of the auto calibration is directly written in the VCO center frequency register VCO...

Страница 9: ...ts on Vcc Operating Mode Notes Symbol Conditions Min Typ Max Unit Power Down ICC_PWDOWN ENABLE Pin 10 or nRESET Pin 4 0 2 A Standby ICC_STDBY ENABLE Pin 10 or nRESET Pin 4 1 and 26MHz crystal oscillat...

Страница 10: ...cing FCHW 4 MHz Transmitter Operation RF Output power on UFL connector RTX 24EM HP AE H and RTX 24EM HP AE V versions See note 4 3 4 PRFMAX 20 dBm See note 4 3 4 PRFEU 10 dBm E R P RF power RTX 24EM H...

Страница 11: ...sibility to the damages caused by an improper us 47015 Modigliana FC ITALY Fax 390546941660 operational modes of the RTX 24EM HP module An example state diagram is described below The SPI interface is...

Страница 12: ...bration mode that must be run periodically by the host microcontroller This keeps the channel frequency and FSK modulator operating within specification Analog components in this block are sensitive t...

Страница 13: ...ata in to RTX 24EM HP MISO Serial data out of RTX 24EM HP The RTX 24EM HP has a programmable interrupt pin IRQ All internal enables signals and parameters of the RTX 24EM HP are mapped in a small 16x1...

Страница 14: ...to MOSI hold 20 ns tSD SS to MISO Valid 30 ns tCD SCK to MISO Valid 30 ns tSCKL SCK low time 40 ns tSCKH SCK high time 40 ns fsck SCK frequency 0 10 MHz tCS SS to SCK Setup 20 ns tCH SCK to SS Hold 2...

Страница 15: ...operation works together with the internal microcontroller and is functional only when this latter has been started SPI command Start_Micro and when the master clock is active Crystal oscillator must...

Страница 16: ...ead_RAM1 This command reads the 12 bits word from the specified address 6bits of RAM1 This command will put the microcontroller on hold and reset state until last bit has been processed Write_RAM1 Thi...

Страница 17: ...nd FIFO s content could be corrupted Always first stop the micro using SPI command Stop_Micro prior to use Reset_Micro Stop_Micro This command stops the microcontroller Start_Micro This command start...

Страница 18: ...om the specified ROM address to RAM1 This allows for fast initialization of the microcontroller subroutines The crystal oscillator must be enabled to perform this operation Additionally ROM_Boot comma...

Страница 19: ...ivity can be monitored through Status 1 by using a simple Stop_Micro SPI command for example When Status 1 has gone low the RAM2 initialization subroutine can be executed Use SPI command Write_RAM1 wi...

Страница 20: ...has a dedicated subroutine located at the ROM_Boot_Address 64 which will perform the VCO auto calibration Auto calibration frequency is set through register VcoCalibFreq 11 0 which is located in RAM1...

Страница 21: ...rates are available Ch_Rate 2 0 000 to 011 On air bit rate kbps Ch_Rate 2 0 R_Bit_Clk 8 0 RAM2 12 11 0 1 5 000 110000000 0x180 2 99 001 011000000 0x2C0 6 02 010 001011111 0x45F 12 037 011 000101111 0...

Страница 22: ...he same channel The host microcontroller can program a channel change which is validated when SPI signal SS goes down Channel spacing of 4 MHz is recommended to limit interference with other RTX 24EM...

Страница 23: ...antenna has a 0dB maximum gain Note 2 the European standard EN 300 440 allows maximum 10dBm RF radiated power This means that with this power setting the device with integrated antenna is not in compl...

Страница 24: ...Micro will reset all internal TXFIFO and RXFIFO pointers to 0 9 11 Received Signal Strength Indicator RSSI A received signal strength indicator RSSI is available through the register Limit_RSSI 3 0 lo...

Страница 25: ...4 Send the SPI command ROM_Boot with ROM_Boot_Address 0 to perform the RAM2 initialization 5 Send the SPI command Write_RAM1 with address 13 and data write 1184 to set RB_Inst_Dis 1 6 Send the SPI co...

Страница 26: ...on mode In this case the next packet transmission requires to execute only steps 24 to 27 Note 1 Transmission mode is started from reception mode So it is not possible to exclude that an incoming pack...

Страница 27: ...dress 33 to perform the PTAT auto calibration 9 Send the SPI command Start_Micro 10 Wait the IRQ pin to go to high this will mean that the PTAT auto calibration subroutine has been executed 11 Clear I...

Страница 28: ...frequency is close to channel data rate correct reception operation can be corrupted SPI commands to retrieve RAM2 values such as Limit_RSSI 3 0 or DFT_Mes 7 0 should be sent immediately after IRQ si...

Страница 29: ...Value Description VDD_Synth_En 11 1 0 VDD_Synth Voltage Regulator enable VDD_RXTX_En 10 1 0 VDD_RXTX Voltage Regulator enable Xtal_En 9 1 0 Crystal oscillator enable Reserved 8 1 0 Reserved Reserved...

Страница 30: ...Reset Value Description Reserved 11 1 0 Reserved Reserved 10 0 0 Reserved 9 1 0 Reserved 8 0 0 Reserved 7 0 0 Reserved 6 0 0 Reserved 5 0 0 Reserved 4 1 0 Reserved 3 0 0 Reserved 2 1 0 Reserved 1 0 0...

Страница 31: ...re_PA 4 11 0 0 Current bias of the PA preamplifier Defines RF output power in Transmit mode I_Pre_PA 3 10 1 0 I_Pre_PA 2 9 1 0 I_Pre_PA 1 8 0 0 I_Pre_PA 0 7 1 0 Reserved 6 0 0 Reserved Reserved 5 0 0...

Страница 32: ...6 Bit Default Value Reset Value Description I_PA 4 11 0 0 Current bias of the PA Defines RF output in Transmit mode I_PA 3 10 1 0 I_PA 2 9 0 0 I_PA 1 8 1 0 I_PA 0 7 1 0 Reserved 6 0 0 Reserved Reserve...

Страница 33: ...n Reserved 11 0 0 Reserved Reserved 10 1 0 Reserved 9 0 0 Reserved 8 0 0 Reserved 7 1 0 Reserved 6 0 0 RB_Inst_Dis 5 0 0 ROMboot Instruction Disable Reserved 4 0 0 Reserved Limit_RSSI 3 3 0 0 RSSI val...

Страница 34: ...l it RAM2 11 0 Address 10 Bit Default Value Reset Value Description Reserved 11 0 0 Reserved Reserved 10 0 0 Reserved 9 1 0 Reserved 8 0 0 Reserved 7 1 0 Reserved 6 0 0 Reserved 5 0 0 Reserved 4 0 0 R...

Страница 35: ...Description Ch_Rate 2 11 0 0 Bandwidth of the normal sensitivity demodulator Ch_Rate 1 10 0 0 Ch_Rate 0 9 0 0 R_Bit_Ck 8 8 1 0 CODEC Bit clock frequency R_Bit_Ck 7 7 1 0 R_Bit_Ck 6 6 0 0 R_Bit_Ck 5 5...

Страница 36: ...Value Reset Value Description Reserved 11 0 0 Reserved Reserved 10 0 0 Frequ 4 9 0 0 Synthesizer s RF Frequency LSB s Frequ 3 8 1 0 Frequ 2 7 1 0 Frequ 1 6 1 0 Frequ 0 5 0 0 N_Pay 4 4 0 0 Payload size...

Страница 37: ...5 LSB s of the header represent the payload size of the packet for payload size defined in header mode ROM_Boot_Address 320 For payload size defined in RAM2 mode ROM_Boot_Address 192 the header is no...

Страница 38: ...In order to obtain the performances described in the technical specifications and to comply with the operating conditions which characterize the certification the device must be mounted on a printed...

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