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CC3200: CC3200

Jawwad Hafeez
Intellectual 870 points
Part Number: CC3200
Other Parts Discussed in Thread: , UNIFLASH

Hi,

I am designing a custom board around a CC3200 Module. The Module comes from a commercial vendor and provides all signals. I am a little confused in hardware design of JTAG. What pullups or pulldowns are required. I am attaching the schematic. Will appreciate input from the knowledge community.

Regards

  • 0
    TI__Mastermind 34810 points

    Hello Jawwad,

    1. Add a 100k pull down resistor on JTAG_TCK (pin #21).
    2. SOP2 must have a 2.7k pull down resistor. 

    After looking over the schematic, the CC3200MOD schematic symbol you are using does not look right. Please see the pin diagram in the datasheet and compare it with this symbol. 

    BR,

    Seong

  • 0 in reply to Seong Kim
    Intellectual 870 points

    Thanks Seong,

    thank you very much

    1 - I have added the tck resistor

    2 - I have corrected the SOP2 pull down resistor value

    The pinouts are that of a module based on cc3200 chip. I am using a module that has the cc3200, osc, antenna and an antenna connector.

    The cc3200 documentation mentions that Uart 0 is used for flash programming.  I will need permanent program storage, so u0 is necessary.

    Any idea plz, how will the programming pod do that.

    Regards

    JH

  • 0 in reply to Jawwad Hafeez
    TI__Mastermind 34810 points

    Hi Jawwad,

    Is there a serial flash internal to the module? By using GPIO1 (UART0_TX) and GPIO 2 (UART0_RX), the CC3200 device will send bootloader commands to copy files onto to the serial flash for permanent storage. This can be done using UniFlash GUI.

    BR,

    Seong

  • 0 in reply to Seong Kim
    Intellectual 870 points

    Hi,

    Thanks for the help again. Yes the module has serial flash.

    This means that GPIO 1 and 2 i.e. Uart0 should be available to be connected to the laptop and JTAG is separate and independent ? We have our own USB to uart/ttl. So will use that.

    But we are using GPIO 12 and 13 for Uart0. Will this work or should I change the connections to GPIO 1 and GPIO 2.

  • 0 in reply to Jawwad Hafeez
    TI__Mastermind 34810 points

    Jawwad,

    GPIO1 and GPIO2 should be used for UART0 in order to program your module. JTAG pins are unique so it is separate and independent. 

    BR,

    Seong