Specifications

Digi m10 Hardware Reference v 1.20
Digi International, Inc. © 2009
Page 14 of 36
Figure 5: Timing Diagram for Powering Down
It is the responsibility of the host controller to back up all messages, reports,
GlobalGrams, etc. before powering down the Digi m10.
2.5 DA (Data Available)
The Data Available signal is an active high signal. It is normally low and is driven high when the
Digi m10 receives messages, user commands, or Global Grams from the satellite. The signal
goes low only after the host controller has cleared the outbound (OB) queue. The Digi m10's
timing diagram for DA is shown in
Figure 6.
Table 5: DA Pin
Pin Name Description
10 DA Data Available
Figure 6: Timing Diagram for Data Available
2.6 SA (Satellite Available)
The Satellite Available is an active high signal. It is normally low and is set to high when the Digi
m10 is receiving valid downlink signals. The Digi m10's timing diagram for SA is shown in
Figure
7.