Appendixes – Rainbow Electronics FARGO MAESTRO 100 (with TCP_IP) User Manual

Page 760

APPENDIXES

Technical

Appendixes

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APPENDIXES

August 23,

2007

8 : When DTR is low and there are no more AT responses, the DCE sets CTS to

low..

Once the last opened DLCI detects the DTR drop from the PC application, the CMUX

driver starts sending a 27.010 PSC protocol frame, and waits for its response before

allowing the entire system to go into Sleep Mode state.

Clear to Send

PSC response

PSC frame

Not Clear to Send

TX data line (DTE)

RX data line (DTE)

1:: All the logical CTS are set high (each connected application can see CTS low)

2: Last CTS drop causes Wavecom Wireless CPU

(DCE) CMUX driver to send a PSC

frame and to wait for the PSC response.

: Application replies with a PSC response

: All Wavecom Wireless CPU

serial virtual ports are in sleep mode state.

3.2.6 Wake Up Procedure
There are two different ways of waking up the Wireless CPU

3.2.6.1 Wake up by DTE (e.g. desktop PC) wakes up Wireless CPU

with a

27.010 Wake up frame

In order to wake up the Wireless CPU

, the client application has to trigger one of its

connected DTR high like the physical scheme.