Specifications

CINTERION
®
BGS12 Hardware Interface Description
Contents
27 of 109
Page
BGS12 HID_V00.915
Confidential / Released
2019
-
01
-
07
When the operating voltage BATT
+BB
/BATT
+RF
is applied, BGS12 can be switched on by
means of the ON signal.
If the operating voltage BATT
+BB
/BATT
+RF
is applied while the ON signal is present for at least
2s, the BGS12 will be switched on automatically. The startup time is about 4s.
Please also note that if there is no ON signal present right after applying BATT
+BB
/BATT
+RF
,
BGS12 will instead of switching on perform a switch on/off sequence that cannot be avoided.
The switch on/off sequence is about 3.7s.
The ON signal is a high active signal and only allows the input voltage level of the VDDLP
signal. The following Figure 5 shows an example for a switch-on circuit (an alternative switch-
on possibility is shown in Figure 59).
Figure 5: ON circuit sample
It is recommended to set a serial 1kOhm resistor between the ON circuit and the external
capacitor or battery at the VDDLP power supply. This serial resistor protection is necessary
in case the capacitor or battery has low power (is empty).
Please note that the ON signal is an edge triggered signal. This implies that a micro-second
high pulse on the signal line suffices to almost immediately switch on the module, as shown
in Figure 6. The following Section 3.3.1.2 describes a sample circuit that may be implemented
to prevent possible spikes or glitches on the ON signal line from unintentionally switching on
the module.
Please also note that if the state of the ON signal is coupled to the state of the VDDLP line or
that if the ON signal otherwise remains active high after switch on, it is no longer possible to
switch off BGS12 using the AT command AT^SMSO. Using this command will instead
automatically restart the module.