What are MCLK and PBCLK signals in a dsPIC33CK256MP508 chip.

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kiptonmoravec
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2018/09/14 12:48:29 (permalink)
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What are MCLK and PBCLK signals in a dsPIC33CK256MP508 chip.

In the dsPIC33CK256MP508 Family DS70005349C Page 357
The baud rate generator has a choice of MCLK and PBCLK.
A text search of the whole document does not show where those clocks are defined. 
The PBCLK is used in the Quadrature Encoder Interface (QED) module Block Diagram (as input) in Figure 15-2 page 333. 
The Oscillator Module with High-Speed PLL also does not define those two clocks. All the clock names are different. 

What is MCLK and PBCLK connected to in the Oscillator Module? 
post edited by kiptonmoravec - 2018/09/14 12:50:07
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    JorgeF
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    Re: What are MCLK and PBCLK signals in a dsPIC33CK256MP508 chip. 2018/09/14 14:30:27 (permalink)
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    Hi
     
    Based on some informed(*) guess work, I would say one is the main clock for the microcontroler core (MCLK) and the other the peripheral bus clock (PBCLK) used by the communications between the core and the peripherals.
     
    (*) PIC32 analogy
     
     
    This document should clarify the details
    http://ww1.microchip.com/downloads/en/DeviceDoc/dsPIC33-PIC24-FRM-Oscillator-Module-with-High-Speed-PLL-70005255b.pdf
     
    post edited by JorgeF - 2018/09/14 14:33:50

    Best regards
    Jorge
     
    I'm here http://picforum.ric323.com too!
    And it works better....
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    kiptonmoravec
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    Re: What are MCLK and PBCLK signals in a dsPIC33CK256MP508 chip. 2018/09/14 14:40:32 (permalink)
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    Is MCLK Fcy, Fp, or Fosc or could it be FVCO/3 like a choice in the UART?

    Is PBCLK AFvcodiv or AFvco? 

    Look at Figure 9-2 page 180. 
    http://ww1.microchip.com/...-Sheet-DS70005349D.pdf

    It is not so obvious. 



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    kiptonmoravec
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    Re: What are MCLK and PBCLK signals in a dsPIC33CK256MP508 chip. 2018/09/14 14:44:56 (permalink)
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    In the document you cited there is no mention of MCLK or PBCLK. 


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    JorgeF
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    Re: What are MCLK and PBCLK signals in a dsPIC33CK256MP508 chip. 2018/09/14 15:00:51 (permalink)
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    Hi
    kiptonmoravec
    In the document you cited there is no mention of MCLK or PBCLK. 

    Ok, so the I misunderstanded the tittle.
    OTOH the document you refrenced is only a "family datasheet",meaning it applies to a whole family of PICs, but is not specific in the details of each one.
    For detailied infomation you should look at the "Family Reference Manual", its spited in sections, each oen on a different PDF.
    The section 1 is the index/list of the others
    http://ww1.microchip.com/downloads/en/DeviceDoc/S1.pdf
    BTW, all this documentation is listed and accesible from the PIC device page
    https://www.microchip.com/wwwproducts/en/dsPIC33CK256MP508
    under the "documentation" tab.
     
     

    Best regards
    Jorge
     
    I'm here http://picforum.ric323.com too!
    And it works better....
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