Ublox LISA-U1 Series System Integration Manual

Also see for LISA-U100: Integration manual

Contents

Ublox LISA-U1 Series System Integration Manual Manual pdf 28 page image

LISA-U1 series - System Integration Manual3G.G2-HW-10002-3 Preliminary System descriptionPage 28 of 125~30 msIDLE MODE ACTIVE MODE IDLE MODE500-700 μAActive ModeEnabledIdle ModeEnabled500-700 μA2G case: ~125 mA3G case: ~85 mA2G case: 0.44-2.09 s3G case: 0.61-5.09 sIDLE MODE2G or 3G case: ~30 msACTIVE MODETime [s]Current [mA]150100500Time [ms]Current [mA]1501005005-10 mA 20-25 mA2G case: ~125 mA3G case: ~85 mAPLLEnabledRXEnabled35-40 mADSPEnabledFigure 13: Description of VCC current consumption profile versus time when the module is registered with 2G or 3G networks:the module is in idle mode and periodically wakes up to active mode to monitor the paging channel for paging block reception1.5.3.4 2G and 3G fixed active mode (power saving disabled)Power saving configuration is by default disabled, or it can be disabled using the appropriate AT command (referto u-blox AT Commands Manual [2], AT+UPSV command). When power saving is disabled, the module doesn’tautomatically enter idle-mode whenever possible: the module remains in active mode.The module processor core is activated during active-mode, and the 26 MHz reference clock frequency is used.An example of the current consumption profile of the data module when power saving is disabled is shown inFigure 14: the module is registered with the network, active-mode is maintained, and the receiver and the DSPare periodically activated to monitor the paging channel for paging block reception.