Motorola AT Commands G24-L - Sleep Mode at Commands; Sleep Mode HW Signals

Modem Configuration and Profile
3-200 G24-L AT Commands Reference Manual April 15, 2008
enables the G24-L sleep mode and signals its readiness for sleep. For this purpose, a set of AT
commands and dedicated HW lines are defined.
Note: The Sleep mode feature is not relevant when using USB. In USB mode the G24-L is
always awake. While USB is connected, do not use the following:
1. Sleep mode AT commands.
2. Sleep mode dedicated HW line (wake in/wake out).
Sleep Mode AT Commands
The following are the Sleep mode AT commands:
• ATS24: Activates/deactivates Sleep mode.
The G24-L receives a request to activate or deactivate Sleep mode.
• ATS102: Sets the value of the delay before sending data to the terminal.
The G24-L receives the value that defines the period to wait between sending the wake-up
signal, and sending data to the terminal.
• ATS100: The minimum time that takes the Terminal to enter sleep mode. Only if this time
period passes, the G24-L will wait ATS102 time between wake-up out line and data
transmission.
• AT+MSCTS: The UART's CTS line control.
The G24-L receives a request to define the behavior of the CTS line when the G24-L is in
Sleep mode. It enables or disables activation of the CTS line after wakeup.
Sleep Mode HW Signals
Two HW lines are used:
• One for waking the G24-L (Wakeup-In)
• One for waking the terminal (Wakeup-Out)
Terminal Does Not Wake the G24-L (If the Terminal Uses Hardware Flow
Control Only)
When the G24-L is in Sleep mode, the CTS line is also inactive. The terminal does not send any
characters to the G24-L if the CTS is inactive, otherwise the character may be lost (Hardware
Flow Control).
Terminal Wakes the G24-L Using the Wakeup-In Line
The terminal uses the Wakeup-In line (pin #16) to wake up the G24-L when it wants to send data.
When the Wakeup-In line is low, the G24-L will not enter the Sleep mode. If the terminal has data
to send while the G24-L is sleeping, it activates the line (brings it to active low), then waits 10 ms
(the time required to wake the G24-L). Only then can the terminal start sending data.