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CC3135MOD: about CC3135MOD FLASH SPI pins and TEST pins

Part Number: CC3135MOD
Other Parts Discussed in Thread: CC3135

Hello Experts,

 

My customer is considering to use the CC3135MOD and they have inquiry FLASH SPI pins and TEST pins

of the CC3135MOD as follows;

 

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In the CC3135MOD data sheet has miss match the input / output attributes (I/O TYPE) for FLASH SPI pins and TEST pins.

1.P10 Table 7-1. Pin Description and Attributes

2.P45 Figure 10-3. CC3135MOD Module Reference Schematic

As a pin number,With 13,14,15,17 FLASH_SPI pins,

It is a TEST pin of 48,49,50,52.

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I Think that about FLASH SPI pin,

No.1 is writing from the CC3135 to 32-Mbit SFlash and No2. is writing from the external to 32-Mbit SFlash

(External SPI Programming) when FLASH SPI pins of the CC3135 are Hi -z stat.

 

About TEST pins, I have no idea.

 

Tell me please about this.

 

Best regards,

 

Y M

  • Hi,

    1. Pin 10 in table Table 7-1 is a Digital input or output, and is assigned to pin 10 on the CC3135MOD device, but will be pin 4 on the CC1235 IC device

    2. Pin 45 on the "Figure 10-3. CC3135MOD Module Reference Schematic" is an unused pin on the module that should be left as No-Connect.

    To try and answer the TEST pins question; The TEST pins 48,49,50,52 on the CC3135MOD device, would be pins 58,59,60 and ,62 on on the CC1235 IC device. 

    The I/O of the TEST pins in 7-2 are correct, but pin 49 in Table 7-1 is incorrect.  Since in "Figure 10-7. CC3135 Engine Area" of the CC1235 Data Sheet you can see that;

    TEST_58= IC pin 58= CC_WLRS232_TX = Output

    TEST_59= IC pin 59 = CC_WLRS232_RX = Input

    TEST_60= IC pin 60 = CC_WL_UART_TX = Output

    TEST_62= IC pin 62 = CC_NWP_UART_TX = Output

    The FLASH SPI pins 13,14,15, and 17 have an incorrect "Signal Direction" on the datasheet. The FLASH SPI pins information seen in Table 7-1 and Table 7-2 should be corrected to as the following:

    Signal Name Module Pin Pin Type/Signal Detection Description
    FLASH_SPI_MISO 13 Output External serial Flash interface: SPI data Out
    FLASH_SPI_CS 14 Input External serial Flash interface: SPI chip select
    FLASH_SPI_CLK 15 Input External serial Flash interface: SPI clock
    FLASH_SPI_MOSI 17 Input External serial Flash interface: SPI data In

    Let me know if this answered their questions!

    Best Regards,

    Jessica M. Torres

  • Hello Jessica,

     

    Thank you for your quick reply.

    I have a question about FLASH SPI pins as bellow;

    1.P10 Table 7-1. Pin Description and Attributes

    2.P45 Figure 10-3. CC3135MOD Module Reference Schematic

     No.1 is writing from the CC3135 to 32-Mbit SFlash and No2. is writing from the external to 32-Mbit SFlash

    (External SPI Programming) when FLASH SPI pins of the CC3135 are Hi -z stat.

    Is this incorrect?

     

    Best regards,

    Y M

     

  • Hi,

    I'm not sure what you are referring to with No.1 P10 and No.2 P45. If you mean to say say that Pin 10 of the module writes to the 32-Mbit SFlash, and that pin 45 writes from the external to 32-Mbit SFlash, that is incorrect. 

    Pin 10 on the module is used for Antenna selection, BLE/2.4 GHz Radio coexistence, or Hostless Mode. Pin 45 on the module is not used, and should be left as NC. 

    Inside the CC3135MOD, the CC3135 IC (not the module) writes to the 32-Mbit SFlash using SPI pins FLASH_SPI_CLK, FLASH_SPI_MOSI, FLASH _SPI_MISO, and FLASH _SPI_CS (respectively 11, 12, 13, and 14 IC pins ).

    External flashing to the 32-Mbit SFlash requires to use the Module SPI pins 13, 14, 15 and 17, which should connect to the 32-Mbit SFlash directly. These pins were described in my previous post as 3 inputs and 1 output, even though the datasheet may currently have the incorrect "Pin-Type/Signal-Detection".

    Let me know if that cleared up your questions.

    Best Regards,

    Jessica M. Torres

  • Hello Jessica,

     

    Thank you for your comment.

    I have reported your comment to my customer and They understood.

    So, Their inquiry was resolved.

     

    Thank you so much for your advice.

     

    Best regards,

     

    Y M