Backup Modes - Ublox EVK-M101 User Manual

Figure 14: EVK-M101/C receiver power mode configuration

8.5.1 Backup modes

u-blox M10 receiver supports hardware backup, hardware standby, and software standby modes.
The hardware standby mode is not supported on EVK-M101/C.
• Hardware backup mode: In this mode, other supplies except the backup supply (V_BCKP) are
turned off. On the EVK-M101/C, this is achieved by turning off the main power supply of the
EVK either by removing the USB cable or the 5.0 V supply from the 14-pin connector.
• Software standby mode: In this mode, the receiver executes little or no system activity. To
wake the receiver up from the software standby mode, the wakeup source can be configured in
UBX-RXM-PMREQ message. The available wakeup sources are EXTINT, SPI CS, and UART RxD
signals.
The duration in the UBX-RXM-PMREQ message can be set to 0 for putting the receiver to
software standby mode indefinitely until a signal is detected from the configured wakeup
source. In addition, ensure that the force option is selected.
The RAM memory is cleared in software standby mode and the off state of PSMOO.
Therefore, the configuration must be saved in RAM and BBR layers or permanently in the
Flash layer. This way, the configuration is maintained afer the receiver wakes up from the
inactive state.
Refer to u-blox M10 interface description for more information on advanced configuration of the
receiver [6].
UBX-21003949 - R04
C1-Public
8 Device configuration
EVK-M101, EVK-M101C - User guide
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