Specifications

CINTERION

BGS12 Hardware Interface Description

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BGS12 HID_V00.915

Confidential / Released

2019

reset state. The reset state is described in Section 3.3.3 as well as in the figures showing the

startup behavior of an interface.

After releasing the EMERG_RST line, i.e., with a change of the signal level from low to high,

the module restarts. The other signals continue from their reset state as the module was

switched on by the ON signal.

Figure 8: Emergency shutdown/restart timing

It is recommended to control this EMERG_RST line with an open collector transistor or an open

drain field-effect transistor.

Caution: Use the EMERG_RST line only when, due to serious problems, the software

is not responding for more than 5 seconds. Pulling the EMERG_RST line causes the

loss of all information stored in the volatile memory. Therefore, this procedure is intend-

ed only for use in case of emergency, e.g. if BGS12 does not respond, if reset or

shutdown via AT command fails.

3.3.3 Signal States after Startup

Table 7 lists three states each interface signal passes through during reset and firmware in-

itialization:

1) At reset: BGS12 begins to startup and performs the reset action.