Specifications

XT65/XT75 Hardware Interface Description

3.3 Power-Up / Power-Down Scenarios

XT65_XT75_HD_v01.001 Page 31 of 133 2007-1-8

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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" or "^SYSSTART AIRPLANE MODE" 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 Section 3.3.2 Signal States after Startup

Figure 5: Power-on with operating voltage at BATT+ applied before activating IGT

For details on how to use EMERG_RST to reset applications

or external devices see Section 3.3.1.6.