Ublox XPLR-IOT-1, Руководство пользователя

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XPLR-IOT-1 - User guide
UBX-21035674 - R02 Platform description Page 23 of 39
C1-Public
Figure 17 shows the location of the GNSS antenna. An I2C connection between SARA-R5 and
MAX-M10 provides direct communication between the two modules without involving NORA.
Figure 17: GNSS antenna
3.4.4.1 GNSS receive path
MAX-M10 is connected to the receive antenna through one of two paths – a straight-connection or
through a SAW/LNA/SAW combination. The RF path is selected through jumper NO6.
Jumper NO6 RF path
Open (default) Bypass
Closed SAW/LNA/SAW
Table 13: GNSS RF receive path
3.4.4.2 MAX-M10 power supply and current measurement
MAX-M10 operates at 3 VDC. The main 3V3 power supply is connected to an LDO to provide this
voltage. The enable input of the LDO is used to switch power to MAX-M10 with control signals from
NORA-B1 or SARA-M510. The RAM and RTC can be maintained by enabling the
V_BCKP power rail.
NORA_EN_MAX SARA_EN_MAX MAX_BACKUP_EN MAX-M10 state
Low Low Low Off, no backup
High Low Low Normal operation, no backup
Low High Low Normal operation, no backup
High High Low Normal operation, no backup
Low Low High Off, RAM and RTC backed up
High Low High Normal operation, RAM and RTC backed up
Low High High Normal operation, RAM and RTC backed up
High High High Normal operation, RAM and RTC backed up
Figure 18: MAX-M10 power modes