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LISA-U series - System Integration Manual
UBX-13001118 - R17
Advance information
Appendix
Page 173 of 190
Appendix
A
Migration from LISA-U1 to LISA-U2 series
Migrating LISA-U1 series designs to LISA-U2 series modules is a straight forward procedure. Nevertheless there
are some points to be considered during the migration.
Not all of the functionalities available with LISA-U1 series modules are supported by all LISA-U2 series
modules versions. These include:
o
Analog Audio Interfaces are not supported by all LISA-U2 series modules
o
Digital Audio Interfaces are supported by all LISA-U2 series modules versions except LISA-U200-00S
o
Embedded AssistNow Software, GNSS via Modem, Hybrid positioning and CellLocate
®
functionalities are supported by all LISA-U2 series modules versions except LISA-U200-00S
A.1
Checklist for migration
Have you chosen the optimal module?
For HSDPA category 14, 6-band 3G, Digital Audio Interfaces support, select a LISA-U230 module.
For HSDPA category 8, 6-band 3G, Digital Audio Interfaces support, select a suitable LISA-U200 module.
For HSDPA category 8, 5-band 3G, Digital Audio Interfaces support, select LISA-U201 module.
For HSDPA category 8, 2-band 3G 850/1900 (North America), Digital Audio Interfaces support, select a
suitable LISA-U260 module.
For HSDPA category 8, 2-band 3G 900/2100 (Europe, Asia, Middle-East and Africa), Digital Audio
Interfaces support, select a suitable LISA-U270 module.
Check LISA-U2 series Hardware Requirements
Check the supported 3G bands for proper antenna circuit development, since LISA-U2 supports
different 3G bands in comparison to LISA-U1 series cellular modules.
Check audio requirements, since Analog Audio Interfaces are not supported by LISA-U2 series.
Check audio requirements, since Digital Audio Interfaces are supported by all LISA-U2 series modules
versions except LISA-U200-00S.
Check the
PWR_ON
low pulse time specified to switch-on the module, since
PWR_ON
low pulse time
requirement is different in comparison to LISA-U1 series modules.
Check the
PWR_ON
behavior, since all LISA-U2 series modules versions except LISA-U200-00S can be
switched off forcing
PWR_ON
pin to the low level for at least 1 s.
Check the
PWR_ON
input voltage thresholds, since they are slightly changed in comparison to LISA-U1
series modules. By the way, this is not relevant driving the
PWR_ON
input by an open drain or open
collector driver as recommended.
Check the
RESET_N
input voltage thresholds, since they are slightly changed in comparison to LISA-U1
series modules. By the way, this is not relevant driving the
RESET_N
input by an open drain or open
collector driver as recommended.
Check the
V_BCKP
operating characteristics, since they are slightly changed in comparison to LISA-U1
series modules.
Check internal active pull-up / down values at digital interface input pins and the current capability of
digital interface output pins, since they are slightly changed in comparison to LISA-U1 series modules.