EGS3 Hardware Interface Description
3.15 Control Signals
70
EGS3_HD_v01.000a
Page 68 of 117
2009-08-12
Confidential / Released
3.15
Control Signals
3.15.1
Synchronization Signal
The synchronization signal serves to indicate growing power consumption during the transmit
burst. The signal is generated by the SYNC line. Please note that this line can adopt three dif-
ferent operating modes which you can select by using the AT^SSYNC command: the mode
AT^SSYNC=0 described below, and the two LED modes AT^SSYNC=1 or AT^SSYNC=2 de-
scribed in
The first function (factory default AT^SSYNC=0) is recommended if you want your application
to use the synchronization signal for better power supply control. Your platform design must be
such that the incoming signal accommodates sufficient power supply to the EGS3 module if
required. This can be achieved by lowering the current drawn from other components installed
in your application.
The timing of the synchronization signal is shown below. High level of the SYNC line indicates
increased power consumption during transmission.
Figure 31:
SYNC signal during transmit burst
*)
The duration of the SYNC signal is always equal, no matter whether the traffic or the access
burst are active.
t is a fixed time in the range of 100
s...200
s.
