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sands
Visitor II
October 28, 2006
Question

Regarding- data transmission in zero crossing by ST7538 (important)

  • October 28, 2006
  • 1 reply
  • 641 views
Posted on October 28, 2006 at 03:07

Regarding- data transmission in zero crossing by ST7538 (important)

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    1 reply

    S
    sandsAuthor
    Visitor II
    October 28, 2006
    Posted on October 28, 2006 at 03:07

    Sir,

    I am using Synchronous mode in communication by ST7538. So every bit is transmitted by the CLR/T clock. Now my task is to transmit data ie 1 bit in zero crossing time of AC cycle. Since modem has the facility to generate zero crossing pulse, i have given proper hardare to generate zero crossing pulse.now i am getting zero crossing output ZCOUT. i did enable the 11th bit (Command Write) for zero crossing sysnchronisation.

    * Is it possible to send 1 bit as frequency? also Is it possible to detect in Reciever side?

    * Is preamble transmission compulsary? because every time i want to transmit only 1 bit of my data.

    * Is CLR/T necessary to transmit data?

    * I want to transmit a bit as such transmit a bit in zero crossing then stop and then again transmit next bit in next zero crossing.

    * Also send me other possiblities.(asynchronous method or any other chips)

    * Also is there any 5 msec period cycle - CLR/T clock which synchronise with ZCOUT clock posedge or negative edge.(Any other IC)

    I EXPECT YOUR REPLY VERY SOON,

    THANK U

    SARAVANAN.V.A

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