Data Sheet

RM1xx LoRa/BLE Modules
Datasheet
https://connectivity.lairdtech.com/wireless-
modules/lorawan-solutions
3
© Copyright 2019 Laird. All Rights Reserved
Americas: [phone]
Europe: [phone]
Hong Kong: [phone]
CONTENTS
1 Overview and Key Features ................................................................................................................................................ 5
1.1 Features and Benefits................................................................................................................................................. 5
1.2 Application Areas ....................................................................................................................................................... 5
2 Specifications ...................................................................................................................................................................... 6
3 Hardware Specifications ..................................................................................................................................................... 9
3.1 Block Diagram and Pin-out ......................................................................................................................................... 9
3.2 Pin Definitions .......................................................................................................................................................... 10
3.3 Electrical Specifications ............................................................................................................................................ 12
3.3.1 Absolute Maximum Ratings ............................................................................................................................. 12
3.3.2 Recommended Operating Parameters ............................................................................................................ 12
3.3.3 nAutoRUN Pin and Operating Modes .............................................................................................................. 14
3.3.4 LoRa Output Power and Current Consumption vs Vcc .................................................................................... 14
3.3.5 LoRa Receive Sensitivity vs Data Rate ............................................................................................................. 15
3.3.6 BLE Power Consumption ................................................................................................................................. 16
4 Functional Description ...................................................................................................................................................... 19
4.1 Power Management (includes brown-out and power on reset) .............................................................................. 19
4.2 Clocks and Timers ..................................................................................................................................................... 20
4.2.1 Clocks ............................................................................................................................................................... 20
4.2.2 Timers .............................................................................................................................................................. 20
4.3 RF .............................................................................................................................................................................. 20
4.4 UART Interface ......................................................................................................................................................... 20
4.5 SPI Bus ...................................................................................................................................................................... 21
4.6 I2C Interface ............................................................................................................................................................. 22
4.7 General Purpose I/O, ADC and PWM/FREQ ............................................................................................................. 22
4.7.1 GPIO ................................................................................................................................................................. 22
4.7.2 ADC .................................................................................................................................................................. 22
4.7.3 PWM and FREQ Signal Output on up to Two SIO Pins ..................................................................................... 22
4.8 nRESET Pin ................................................................................................................................................................ 23
4.9 nAutoRUN Pin........................................................................................................................................................... 23
4.10 RM1xx VSP Service and Modes ................................................................................................................................ 23
4.11 Two-Wire SWD Programming/Debug Interface ....................................................................................................... 24
4.12 RM1xx on-board chip antenna characteristics ......................................................................................................... 25