™ SRF305 User Manual 17 April 2014 U080.0.2-SRF305 2014 Cervis, Inc.
Module SRF305 This document is the property of Cervis, Inc. and cannot be copied, modified, e-mailed, or reproduced without the express prior written consent of Cervis, Inc. Cervis, Inc. reserves the right to change this manual or edit, delete, or modify any information without prior notification. FCC Statements 15.19 – Two Part Warning This device complies with Part 15 of the FCC rules.
User Manual Table of Contents Table of Contents .......................................................................................................................... i List of Figures ............................................................................................................................... i List of Tables ................................................................................................................................. i Cervis Inc. Safety Precautions ..............
Module SRF305 Notes and Observations ii U080.0.
User Manual Cervis Inc. Safety Precautions Read and follow all instructions. Failure to abide by Safety Precautions may result in equipment failure, loss of authority to operate the equipment, and personal injury. Use and maintain proper wiring. Follow equipment manufacturer instructions. Improper, loose, and frayed wiring can cause system failure, equipment damage, and intermittent operation.
Module SRF305 1.0 SRF305 Introduction The SRF305 receive/transmit module (RTM) is based on a single-chip radio frequency (RF) transceiver integrated circuit (RFIC), an Atmel AT86RF231. The RT module also contains an external RF transmit power amplifier plus low noise RF receive preamplifier integrated circuit (PA/LNA), an RFaxis RFX2401C. The SRF305 RTM is intended to be integrated into Cervis Inc. products, providing a wireless RF connectivity option. The SRF305 RTM operates in the 2.
User Manual LOBSRF305, the following elements confirm that LOBSRF305 complies with the definition of a modular transmitter: a. The radio elements of the modular transmitter have their own shielding. The physical crystal and tuning capacitors are located internal to the shielded radio elements. b. The modular transmitter has buffered modulation/data inputs to ensure that the module will comply with part 15 requirements under conditions of excessive data rates or over-modulation. c.
Module SRF305 Figure 1. SRF305 RF section Front Figure 2. SRF305 RF section Back 1.2 SRF305 Pinouts Table 1-4 show the pinouts and interface signals on several alternative packaging options for the SRF305 RTM: Table 1.
User Manual 10 RF_HGM/BPA Enable external LNA or Function not used in SRF305 Read BPA jumper Input to SPI master 11 GND ground Low impedance ground 12 GND ground Low impedance ground 13* DISPLAYCS Display chip select Low from SPI master 14* /RFEE_CS (reserved) EE chip select Low from SPI master 15* DISPLAYRS Display register select From SPI master 16* DISPLAYBLANK Display on/off From SPI master 17 reserved reserved reserved 18 reserved reserved reserved 19* DISPLAYRST
Module SRF305 Figure 3. 07440305-2H-U-12R, component side, shield, internal label, external antenna connector 6 U080.0.
User Manual Table 2.
Module SRF305 Insert image of 074200305-2H-12R when available Figure 4. 07420305-2H-U-12R, component side, shield, internal label, external antenna connector 8 U080.0.
User Manual Table 3. 07610204 PCB – plug-in connector J1 Pin Name Signal Details 1 SPI_CLK SPI data clock in Clock from SPI master 2 GND ground Low impedance ground 3 MISO SPI data out Data from SPI slave 4 MOSI SPI data in Data from SPI master 5 RF_SLP_TR RFIC control Multipurpose control signal from master 6 /RF_RST RFIC reset Low from SPI master 7 /RF_CS RFIC chip select Low from SPI master 8 RF_IRQ RFIC interrupt output Input to SPI master 9 RF1_3VD +3.0-3.
Module SRF305 Figure 5. 07610304-2H-U, component side, shield, internal label, external antenna connector 10 U080.0.
User Manual Figure 6. 07610304-2H-U, bottom side. 2014Cervis, Inc.
Module SRF305 Table 4.
User Manual Figure 6. 07100366-2H, component side, shield, internal label 2014Cervis, Inc.
Module SRF305 2.0 SRF305 Installation When integrating an SRF305 RTM into a host application, the user must provide all text in the “FCC Statements” and “Industry Canada Statements” in the host application’s user manual (see Forward Material). The text must not be modified in any way and presented in a conspicuous manner that the end user can be reasonably expected to access.
User Manual The PCB hosting the RTM should be fabricated with low impedance copper floods that connect to “GND”. The SRF305 RTM can safely operate with a supply voltage over the range of 3.0-3.3V with minimal changes in RF performance. 4.2 Operating Current The SRF305 RTM has four primary operating conditions that draw differing amounts of current from to 3.0-3.
Module SRF305 Visit our Web site at: www.cervisinc.com 2014 Cervis, Inc. All rights reserved. Content is subject to change without notice. 16 U080.0.
