Ublox XPLR-IOT-1, Руководство пользователя

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XPLR-IOT-1 - User guide
UBX-21035674 - R02 Platform description Page 13 of 39
C1-Public
3.2.4 System reset
Behind the hole marked RST is the System reset button. When pressed, all modules are reset by
hardware. Applications can also control the NORA-B1 GPIO pins to reset the SARA-R5 and NINA-W15
modules independently with
SARA_RST and NINA-RST . See also GPIO assignments .
Table 4 shows the signals and possible reset options for each module and USB IC.
Signal State NORA-B1 SARA-R5 NINA-W15 MAX-M10 USB hub IC USB-UART IC
SYS_RST High Reset Reset Reset Reset Reset Reset
SARA_RST High - Reset - - - -
NINA_RST High - - Reset - - -
Table 4: Reset states
System reset can be isolated from each module by cutting the associated jumper, noted in Table 5.
This can be useful to independently reset each major component when developing applications. See
also the XPLR-IOT-1 schematic in the XPLR-IOT-1 GitHub XPLR-IOT-1 repository
[1] .
Module or IC Reset isolation jumper
USB hub IC NC11
USB-UART bridge IC NC8
NORA-B1 NC12
NINA-W15 NC1
SARA-R5 NC4
MAX-M10 NC10
Table 5: System reset isolation jumpers
☞
Cutting NC8 and NC11 isolates the system reset signal so that any active transition resets the
u-blox modules but not the USB hub and USB-UART virtual COM port. This allows a terminal
program or u-blox utilities to receive module boot messages when the reset button is pressed.