LR1121
User Manual Rev 1.1
UM.LR1121.W.APP Mar 2023
21 of 130
Semtech
Proprietary & Confidential
www.semtech.com
2.3 Firmware Upgrade
The LR1121 can be upgraded with a new firmware image, supplied by Semtech. Complete details are provided in the
Application note AN1200.57 “LR1110: Upgrade of the Program Memory”, available from the Semtech website. The related
commands are described hereafter.
2.3.1 GetVersion
Command GetVersion() returns the version of the LR1121.
• HW Version is the version of the LR1121 hardware
• Use Case specifies the usage of the device:
0x01: LR1110
0x02: LR1120
0x03: LR1121
0xDF: Bootloader mode
• FW Major + FW Minor is the version of the LR1121 internal firmware stored in flash memory
2.3.2 EraseFlash
In bootloader mode only, the EraseFlash(...) command must be used before a new image is written to the device.
If executed in another mode, the command status in Stat1 is set to P_ERR.
Table 2-11: GetVersion Command
Byte 0 1
Data from Host 0x01 0x01
Data to Host Stat1 Stat2
Table 2-12: GetVersion Response
Byte 0 1 2 3 4
Data from Host 0x00 0x00 0x00 0x00 0x00
Data to Host Stat1 HW Version Use Case FW Major FW Minor
Table 2-13: EraseFlash Command
Byte 0 1
Data from Host 0x80 0x00
Data to Host Stat1 Stat2
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