PIONEERPOS G24-LC manual Wakeup-In Line, Wake up Outline

Chapter 3: AT Commands Reference

Data transmit

TXD

Line (pin #21)

WAKEUP-IN

Line (pin #16)

Idle

Wakeup

10 ms

Figure 3-9: Wakeup-In Line

Two modes exist:

•Idle Mode: The terminal has no data to send. If the terminal enables sleep mode (using ats24), the G24-L activates its Sleep mode module.

•Wakeup Mode: The G24-L does not enter sleep mode, and the terminal can send data.

Once the terminal changes the line edge to Wakeup mode, it needs a 10 ms delay before sending any data to the G24-L (using the RS232 protocol).

G24-L Wakes the Terminal

•The G24-L follows these steps in order to wake up the terminal:

•The G24-L indicates to the terminal that it has data and that it must wake up. The G24-L 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 G24-L gets the output wakeup line to high.

Figure 3-10: Wake up Outline

April 15, 2008 G24-L AT Commands Reference Manual 3-201