EES3 Hardware Interface Description
3.16 Control Signals
71
EES3_HD_v01.100b
Page 69 of 118
2009-08-12
Confidential / Released
3.16
Control Signals
3.16.1
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 EES3 module if re-
quired. 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 34:
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.
