Ublox TOBY-R2 Series System Integration Manual

Also see for TOBY-R2 Series: User guide

Contents

Ublox TOBY-R2 Series System Integration Manual Manual pdf 28 page image

TOBY-R2 series - System integration manualUBX-16010572 - R10 System description Page 28 of 1511.6.2 Module power-offTOBY-R2 series can be properly switched off by: AT+CPWROFF command (see u-blox AT commands manual [2]). The current parameter settingsare saved in the module’s non-volatile memory and a proper network detach is performed. Low pulse on the PWR_ON pin, which is normally set high by an internal pull-up, for a valid timeperiod (see TOBY-R2 series data sheet [1]): the modules start the internal switch-off sequencewhen the external application releases the PWR_ON line from the low logic level, after that it hasbeen set low for a proper time period.An abrupt under-voltage shutdown occurs on TOBY-R2 series modules when the VCC module supplyis removed. If this occurs, it is not possible to perform the storing of the current parameter settingsin the module’s non-volatile memory or to perform the proper network detach.☞ It is highly recommended to avoid an abrupt removal of the VCC supply during TOBY-R2 seriesmodules normal operations: the switch off procedure must be started by the AT+CPWROFFcommand, waiting the command response for a proper time period (see u-blox AT commandsmanual [2]), and then a proper VCC supply has to be held at least until the end of the modules’internal switch off sequence, which occurs when the generic digital interfaces supply output(V_INT) is switched off by the module.An abrupt hardware shutdown occurs on TOBY-R2 series modules when a low level is applied onRESET_N pin. In this case, the current parameter settings are not saved in the module’s non-volatilememory and a proper network detach is not performed.☞ It is highly recommended to avoid an abrupt hardware shutdown of the module by forcing a lowlevel on the RESET_N input pin during module normal operation: the RESET_N line should be setlow only if reset or shutdown via AT commands fails or if the module does not reply to a specificAT command after a time period longer than the one defined in the u-blox AT commandsmanual [2].An over-temperature or an under-temperature shutdown occurs on TOBY-R2 series modules whenthe temperature measured within the cellular module reaches the dangerous area, if the optionalSmart Temperature Supervisor feature is enabled and configured by the dedicated AT command. Formore details see section 1.14.15 and u-blox AT commands manual [2], +USTS AT command.