TRM-915-R250 RF Transceiver Module Data Guide Warning: Linx radio frequency R) products may be Table of Contents used to control machinery or devices remotely, including machinery or devices that can cause death, bodily injuries, and/or property 1 Description damage if improperly or inadvertently triggered, particularly in industrial 2 Ordering Information settings or other applications implicating life-safety concerns. No Linx Technologies product is intended for use in any application without 2 Absolute Maximum Ratings redundancies where the safety of life or property is at risk. 3 Electrical Specifications 4 Pin Assignments The customers and users of devices and machinery controlled with RF products must understand and must use all appropriate safety 5 Pin Descriptions procedures in connection with the devices, including without limitation, 6 Theory of Operation using appropriate safety procedures to prevent inadvertent triggering by 7 Module Description the user of the device and using appropriate security codes to prevent triggering of the remote controlled machine or device by users of other 8 Module Operation remote controllers. 10 Low-Power States 12 Reset to Factory Default Do not use this or any Linx product to trigger an action directly from the data line or RSSI lines without a protocol or encoder/ 12 Compatibility Mode decoder to validate the data. Without validation, any signal from 12 Automatic Gain Control and Manual Gain Control another unrelated transmitter in the environment received by the module 12 Exception Engine could inadvertently trigger the action. 14 Networking Modes All RF products are susceptible to RF interference that can prevent 20 Extended Preamble communication. RF products without frequency agility or hopping 22 Voltage Supply Rise Time implemented are more subject to interference. This module does have 22 Using the Buffer Empty (BE) Line a frequency hopping protocol built in, but the developer should still be aware of the risk of interference. 22 Using the Exception (EX) Line 22 Using the Processing Incoming Packet (PR PKT) Line Do not use any Linx product over the limits in this data guide. 23 Receive Signal Strength Indication (RSSI) Excessive voltage or extended operation at the maximum voltage could cause product failure. Exceeding the reflow temperature profile could 24 Using the RESET Line cause product failure which is not immediately evident. 26 Using the Command Response (CMD RSP) Line 27 The CMD Line Do not make any physical or electrical modifications to any Linx product. This will void the warranty and regulatory and UL certifications 28 The UART Interface and may cause product failure which is not immediately evident. 28 Configuration Command Formatting 30 Module Configuration 34 Writing to Registers 34 Reading from Registers