AT Commands Reference
192 98-08901C68-O
4.10.2.2.3 g20 Wakes the Terminal
The g20 follows these steps in order to wake up the terminal:
• The g20 indicates to the terminal that it has data and that it must wake up. The g20 uses the Wakeup-Out Line (pin #26)
(brings it to active low).
• While the Wakeup Out line is low, the terminal should not enter Sleep mode.
• The terminal should set a value of the delay (in ms) needed for waking it (using the ATS102 command) before receiving data
(default value is 30 ms).
When the data transmission is complete, the g20 gets the output wakeup line to high.
Figure 13. Wakeup-Out Line
Two modes exist:
• Idle mode: The g20 has no data to send.
• Wakeup mode: The g20 has data to send to the terminal.
After the g20 changes the line edge to Wakeup mode, there will be a delay (the default is 30 ms) sent by the ats102 command
before sending any data to the terminal (using RS232 protocol).
Figure 14. Sleep Mode when S24 > 0
WAKEUP-OUT
Line (pin #26)
RXD
Line (pin #11)
ats102
Wakeup
Idle
Data transmit
g20 CTS
(Default when
at+mscts=0)
g20
Sleep mode
(clock)
Ter mi nal TX D
Awake
Sleep
S24 Less than S24
WAKEUP-IN
30 ms
S24
30 ms
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