Specifications

CINTERION
®
BGS12 Hardware Interface Description
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BGS12 HID_V00.915
Confidential / Released
2019
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The behavior of the RING0 line varies with the type of event:
•
When a voice call comes in the RING0 line goes low for 1s and high for another 4s. Every
5 seconds the ring string is generated and sent over the RXD0 line. If there is a call in
progress and call waiting is activated for a connected handset device, the RING0 line
switches to ground in order to generate acoustic signals that indicate the waiting call.
Figure 33: Incoming voice call
•
Likewise, when a data is received, RING0 goes low. However, in contrast to voice calls, the
line remains low. Every 5 seconds the ring string is generated and sent over the RXD0
line.
Figure 34: incoming data receive
All other types of Unsolicited Result Codes (URCs) also cause the RING0 line to go low,
however for 1 second only.
Figure 35: URC transmission
3.18 Power Indication Circuit
In Power Down mode the maximum voltage at any digital or analog interface line must not
exceed +0.3V (see also Section 5.1). Exceeding this limit for any length of time might cause
permanent damage to the module.
It is therefore recommended to implement a power indication signal that reports the module’s
power state and shows whether it is active or in Power Down mode. While the module is in
Power Down mode all signals with a high level from an external application need to be set to