BGS3 Hardware Interface Description
3.3 Power Up / Power Down Scenarios
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BGS3_HD_v01.000d
Page 27 of 109
2010-03-26
Confidential / Released
To allow the application to detect the ready state of the module we recommend using hardware
flow control which can be set with AT\Q or AT^IFC (see
for details). The default setting of
BGS3 is AT\Q0 (no flow control) which shall be altered to AT\Q3 (RTS/CTS handshake). If the
application design does not integrate RTS/CTS lines the host application shall wait at least for
the “^SYSSTART” URC. However, if the URCs are neither used (due to autobauding) then the
only way of checking the module’s ready state is polling. To do so, try to send characters (e.g.
“at”) until the module is responding.
See also
"Signal States after Startup”.
Figure 5:
Powerup with operating voltage at BATT+ applied before activating IGT
For details on how to use EMERG_
OFF
to reset ap-
plications or external devices see
.
