Ublox TOBY-L2 series, System Integration Manual

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TOBY-L2 and MPCI-L2 series - System Integration Manual
UBX-13004618 - R28 System description Page 34 of 164
1.6.3 Module reset
TOBY-L2 and MPCI-L2 series modules can be properly reset (rebooted) by:
 AT+CFUN command (see u-blox AT Commands Manual [3] ).
MPCI-L2 series modules can be additionally properly reset (rebooted) by:
 AT+CPWROFF command (see u-blox AT Commands Manual [3] ): the behavior differs than
TOBY-L2 series, as MPCI-L2 modules will reboot rather than remain switched off due to modules’
internal configuration.
In the cases listed above an “internal” or “software” reset of the module is executed: the current
parameter settings are saved in the non-volatile memory and proper network detach is performed
An abrupt hardware reset occurs on TOBY-L2 and MPCI-L2 series modules when a low level is applied
on the RESET_N or PERST# input pin for a specific time period. In this case, the current parameter
settings are not saved in module’s non-volatile memory and a proper network detach is not performed.
☞
It is highly recommended to avoid an abrupt hardware reset of the module by forcing a low level on
the RESET_N or PERST# input during modules normal operation: the RESET_N or PERST# line
should be set low only if reset or shutdown via AT commands fails or if the module does not provide
a reply to a specific AT command after a time period longer than the one defined in the u-blox AT
Commands Manual
[3] .
As described in Figure 17 , the RESET_N and PERST# input pins are equipped with an internal pull-up
to the VCC supply in the TOBY-L2 series and to the 3.3 V in the MPCI-L2 series.
Baseband
Processor
23
RESET_N
TOBY-L2 series
VCC
Reset
Power
Management
Reset
50k
Baseband
Processor
22
PERST#
MPCI-L2 series
Reset
Power
Management
Reset
45k
3.3 V
Figure 17: TOBY-L2 and MPCI-L2 series RESET_N and PERST# input equivalent circuit description
☞
For more electrical characteristics details see TOBY-L2 / MPCI-L2 Data Sheet [1][2] .
1.6.4 Module configuration selection by host processor
☞
HOST_SELECT0 and HOST_SELECT1 pins are not available on MPCI-L2 series.
☞
Functionality of HOST_SELECT0 and HOST_SELECT1 pins is not supported by TOBY-L2 series.
TOBY-L2 series modules include two input pins (HOST_SELECT0 and HOST_SELECT1) for the
selection of the module configuration by the host application processor.