u-blox UBX-21004937 Information Manual

Author

Date

Topic

Information note

u-blox M8 receiver description – documentation update

UBX-21004937 C1-Public
JunJun Lu
9 March 2021

Copying, reproducti on, modification or disclosure to third parties of this document or any part thereof is only permitted with the express written permission of u-blox. The inf ormation
contained herein is provided “as is” and u-blox assumes no liability for its use. No warranty, either express or implied, is given, including but not limited, with respect to the accuracy,
correctness, reliability and fitness for a particular purpose of the information. This document may be revised by u-blox at any time. For most recent documents, visit www.u-blox.com.
Copyright© u-blox A G.

1 Affected products

Product Firmware versions

u-blox M8 chips and modules supporting Galileo Based on SPG 3.01, SPG 3.51 or EXT CORE 3.01

2 Type of change

☐ Hardware modification: PCB supplier change
☐ Firmware update
☒ Documentation update
☐ Others

3 Description of change

To avoid discrepancy and potential issues from occurring when enabling Galileo operation in
u-blox M8 chips and modules, some relevant notes have been added to the u-blox 8 and u-blox
M8 receiver description and protocol specification as explained below:

• Section UBX-CFG-GNSS, GNSS system configuration
 After issuing UBX-CFG-GNSS, wait first for the acknowledgement from the receiver

and then 0.5 seconds before sending the next command.

 If Galileo is enabled, UBX-CFG-GNSS must be followed by UBX-CFG-RST with

resetMode set to Hardware reset.

• Section UBX-CFG-RST, Reset receiver / Clear backup data structures
 If Galileo is enabled, UBX-CFG-RST Controlled GNSS start must be followed by UBX-

CFG-RST with resetMode set to Hardware reset. Use resetMode Hardware reset
instead of Controlled software reset or Controlled software reset (GNSS only).

4 Customer impact and recommended action

If using Galileo in the u-blox M8 receivers, customers must follow the instructions given in the
updated u-blox 8 and M8 receiver description to avoid potential issues. Each affected document
([1], [2]) contains a revision history with information about the content changes.

UBX-21004937 u-blox M8 receiver description – documentation update 1/2
C1-Public

5 Reference documents

[1] u-blox 8 and u-blox M8 receiver description including protocol specification,

UBX-13003221

[2] u-blox 8 and u-blox M8 receiver description including protocol specification,

UBX-13002887 (Confidential, NDA required)

UBX-21004937 u-blox M8 receiver description – documentation update 2/2
C1-Public