User Guide

LARA-R2/R6 migration guide - Application note
UBX-21010015 - R02 Contents Page 3 of 25
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Contents
Document information ................................................................................................................................ 2
Contents .......................................................................................................................................................... 3
1 LARA-R2 / LARA-R6 modules description .................................................................................... 4
2 Migration between LARA modules .................................................................................................. 7
2.1 Overview ........................................................................................................................................................ 7
2.2 Pin-out comparison between LARA modules........................................................................................ 9
2.3 Interfaces comparison between LARA modules ................................................................................15
2.3.1 VCC module supply input ................................................................................................................15
2.3.2 V_INT 1.8 V supply output ..............................................................................................................15
2.3.3 V_BCKP RTC supply input/output .................................................................................................16
2.3.4 Cellular RF interfaces .......................................................................................................................16
2.3.5 System control interfaces ..............................................................................................................16
2.3.6 SIM interface .....................................................................................................................................17
2.3.7 UART interfaces ................................................................................................................................17
2.3.8 USB interface .....................................................................................................................................18
2.3.9 I2C interface.......................................................................................................................................18
2.3.10 Digital audio interface ......................................................................................................................19
2.3.11 Clock output .......................................................................................................................................19
2.3.12 GPIOs ...................................................................................................................................................19
2.3.13 Antenna dynamic tuning .................................................................................................................19
2.3.14 Reserved pins ....................................................................................................................................19
2.3.15 Other considerations and test points ..........................................................................................20
2.4 Schematic for LARA modules integration ...........................................................................................21
Appendix ....................................................................................................................................................... 22
A Glossary ................................................................................................................................................. 22
Related documents ................................................................................................................................... 24
Revision history .......................................................................................................................................... 24
Contact .......................................................................................................................................................... 25