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CC2564C: Deep Sleep and Shutdown modes..

Newman
Expert 5845 points
Part Number: CC2564C
Other Parts Discussed in Thread: CC2564,

Hi Team CC2564,

Where is detailed info WRT shutdown and deep sleep modes.. I am having trouble finding. 

My customer has the following questions..

With a new project we are looking to use the CC2564C Bluetooth module.  We are hoping to leverage some of its low power features for when the device is turned off. Any chance there is a white paper somewhere explaining on how to get the best stand-by battery performance?   

Specifically what I am trying to figure out right now is what does deep sleep mode provide over shutdown?  I am assuming I don’t need to reload the service pack at startup which would allow me to shorten the

time the chip was out of a low power start, is the correct?

Also, I am curious if it has any type of auto-wake and sleep features.  An example of this is this chip will communicate with another BLE chip,  is it possible to have the CC2564C in a deep sleep state with a connection interval of 4 seconds, where it would sleep, turn on, send the RX packet and go back into a  deep-sleep mode until its next packet?

Thanks, Merril

  • 0
    TI__Mastermind 25480 points

    Hi Merril,

    Due to holidays, I'm not sure if the team can get back to you soon. 

  • 0
    TI__Genius 13052 points

    Hi Merril,

    The only documentation we have available for our Deep Sleep mode can be found in this article on eHCILL (Low Power Protocol) that I am attaching. It details the communication and wake up procedures.

    CC256x eHCILL Low Power Protocol - Texas Instruments Wiki.pdf

    Thanks,
    Jacob

  • 0 in reply to Jacob B.
    TI__Expert 5845 points

    Hi Jacob,

    Thx!  Can you please make an attempt to answer the customers questions too?

    Thanks, Merril

  • 0 in reply to Newman
    TI__Genius 13052 points

    Hi Merril,

    Newman said:

    Specifically what I am trying to figure out right now is what does deep sleep mode provide over shutdown?  I am assuming I don’t need to reload the service pack at startup which would allow me to shorten the

    time the chip was out of a low power start, is the correct?

    Shutdown differs from deep sleep in that during shutdown the BT_EN line is pulled down. To activate it, the user has to re-initialize the device by pulling up the BT_EN line and downloading the service pack. Alternatively with deep sleep, the device still maintains any active connection it has. After wake up, it will do the necessary transmit and receives to maintain the connection. When there is no connection instance (e.g. in between connection intervals), the device goes into the low power state and then automatically exits this state when it has scheduled network activity. Deep sleep does not require a re-initialization of the Bluetooth stack. 

    Newman said:
    Also, I am curious if it has any type of auto-wake and sleep features.  An example of this is this chip will communicate with another BLE chip,  is it possible to have the CC2564C in a deep sleep state with a connection interval of 4 seconds, where it would sleep, turn on, send the RX packet and go back into a  deep-sleep mode until its next packet?

    Yes, I think so. The user just needs to enable the sleep mode from the HCI_VS command when initializing the device (this is usually at the end of the service pack). Not only can the device wake up automatically on any network activity, it also has a way to wake up to receive any communication from the host. All of our Bluetopia sample applications use deep sleep by default. 

    Additionally, eHCILL is TI’s implementation to communicate sleep status to the host over the HCI interface.

    Thanks,
    Jacob