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CC1110 Issue

Vinoth Manickam
Expert 1105 points
Other Parts Discussed in Thread: CC2510

Hi TI team,

                  Now I'm working on CC1110 project. I need some clarification about Power Down modes in CC1110. I want to implement Power Down Mode 3 in my project. Is it possible to bring the radio back in active mode by using RF Interrupts in PM1, PM2 and PM3?

                  I have tested PM0. Before going to PM0 I have given RX strobe. It is working. If I use PM1,PM2 and PM3, the CC1110 not coming back to active.

 Please give your solution.

Thanks in advance.

regards

Vinoth M

  • 0
    TI__Guru 56650 points

    Hi, 

    the RF module is disabled in PM1-3. Please refer to my answer in your other thread:

    http://e2e.ti.com/support/wireless_connectivity/f/156/p/349351/1223606.aspx

  • 0 in reply to Leo Hendrawan
    Expert 1105 points

    Hi Leo Hendrawan,

                Thanks for your response.

                I implemented PM0 in my application without using RF Interrupts which reducing the current 15  to 18 mA. But if I implement PM0 with RF Interrupts which reducing the current 4 mA only.

    Still I want to reduce the current consumption, Please guide me to select Low power RF Transceiver IC.

    Thanks in advance

    regards,

    Vinoth M.

  • 0 in reply to Vinoth Manickam
    TI__Guru**** 317180 points

    Could you describe your system a bit closer?

    When the chip is in the lowest power modes the frontend is turned off. To be able to receive/ send something you have to turn on the RF core, typically with help of a timer.

  • 0 in reply to TER
    Expert 1105 points

    Hi TER,

    Thanks for your response.

    I have two no, of CC1110, both always in PM0.One CC1110 sends data to other for every one second. Other CC1110 receives the data. This application consumes 49mA current (while it is in receive mode).

    If it is in PM0 it consumes 29 mA (without giving RXstrobe), if I enable RF core before going to PM0 (with RX Strobe) at that time it consumes 45mA (just 4mA only reduced).

    If I implement PM0 without giving RX strobe, CC1110 is not receiving data.

    i want to reduce the current consumption further.
    Any other way to do this?

    Please give your suggestion to solve this issue?

    thanks in advance.


    regards
    Vinoth M.

  • 0 in reply to Vinoth Manickam
    TI__Guru**** 317180 points

    This is a typical case where you would want to look into a polling receiver (http://www.ti.com/lit/an/swra207a/swra207a.pdf CC2510 and CC1110 is equal for this feature).

    If your Tx sends a packet every second, your Rx side only needs to enter Rx just before Tx starts to send. To manage this, Tx and Rx has to be to some extent synchronized.

    In a system like yours it should be possible to have the radio in PM2 for some time, wake the radio with the sleep timer and strobe Rx. Then it's possible to achieve low average current consumption. Power modes are described here: http://www.ti.com/lit/an/swra162b/swra162b.pdf

  • 0 in reply to TER
    Expert 1105 points

    Hi TER,

    I have studied about Sleep timer. I think it is not suitable for my application because if any external input interrupt occurs in Transmitter at any time it will transmit its pin status to other receiving CC1110.

    Can receiving CC1110 be able to receive data from transmitting CC1110 while it is in Sleep Mode?

    Is it possible to receive the data if it is in Sleep mode?

    Please give your suggestion.

    thanks in advance.

    regards

    Vinoth M.

  • 0 in reply to Vinoth Manickam
    TI__Guru**** 317180 points

    The radio has to be in Rx to receive data.

    In your settings you either have to have CC1110 continuously in Rx to not loose a packet when the Tx side sends a packet or if your Tx side sends a very long preamble you could be able to use the Rx side as a polling receiver. Then the preamble has to be longer than the time it takes to go from a power down state to Rx and determine if a preamble is on the air.