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CC1310: Estimated communication processing time

Part Number: CC1310

Hi,

I would like to find the intercommunication time when using two CC1310s(TX and RX). So I have the following questions.

Q1: How long does it take for the TX side to recover from sleep mode and become ready to transmit?

Q2: How long does it take for the RX side to switch to TX after receiving a send packet?
       In other words, I want to know how long it takes to send an ACK.

Best Regards,
H.U

  • Hi UNA,

    A1: This is a bit dependent but assuming full standby I would expect around 1ms, a bit depending on the complete application. This would include the standby -> active delay + power driver bring up delay (re-configuring drivers and powering on peripherals that should be on) + Powering up the radio, configuring it and issuing the TX command. 

    The actual time depends on several factors such as the RF settings used, if you need to do radio patching and what peripherals the rest of the application use.

    A2: This depends on from what points you setup your "measurement" and also on how you write the software. Assuming the simplest case, you would maybe (ballpark numbers here) have ~100 us delay from RX done over the air until the application was notified (in other words, delay in the end of the RX command) and ~100us delay from running to the TX command until something is on the air . These delays are more or less delays related to modem data crushing and setup times. 

    Say you first issue RX, wait for packet and then issue TX, then I would count on having at least 300 us + application overhead in "switching time" between the two. You could of course do many tricks to optimize for "speed" here but it very much depend on the use-case and how the "protocol" you are trying to implement work. Without knowing the details, I can really only give these kind of "ball park" numbers.