Restating your question, you would like to know two parameters:  the startup
time of the radio (off->on), and the time it takes to switch back and forth
between rx and tx.

 

The startup time is approximately 3 milliseconds.  The tx->rx and rx->tx
switching takes approximately 140 us in either direction.

 

If you can see it, the plot below shows the radio turning on and immediately
off again.  The ~20 mA spike is when the radio actually reaches Rx mode, and
then turns back off.  The spike at the beginning is the oscillator powering
up.

 

-David

 



 

  _____  

From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of roberto
pagliari
Sent: Monday, June 18, 2007 3:27 PM
To: [email protected]
Subject: [Tinyos-help] start up time

 

hi all,
does anyone know the start up time of the cc2420 radiochip ? I mean moving
from transmit to receive mode or viceversa? How many useconds?

<<image002.jpg>>

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