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FDC2214: about datasheets

R.Fukunaga
Expert 1765 points
Part Number: FDC2214

Hi all,

I would like to ask you the questions about the satasheets of FDS2214.

1)There are 2 notations of b10 in Table 32. Is the second one a mistake of b11?

2) Do I need to retrieve STAUS at 0x18 and verify INTB before loading the data?

The FDC2214 provides measurement data from address 0x00~0x07.
When using EVM, STAUS was obtained from 0x18 before reading the data.
When STAUS is read, INTB signal is High automatically.
After a while, INTB will change to Low.
So I was reading the measurement data of 0x00~0x07 for the first time.

I could not find any description of the above process in the datasheet.

Best Regards,

Ryusuke

  • +1
    TI__Expert 7950 points

    Hi Ryusuke-san,

    Thanks for posting to the Sensors forum.

    R.Fukunaga said:
    1)There are 2 notations of b10 in Table 32. Is the second one a mistake of b11?

    In this case, the repeat of b10 is intentional because it is recommended to set CHx_FIN_SEL to b10 for single-ended sensor configuration. The first part of the description is the recommendation for differential sensor configurations.

    R.Fukunaga said:
    2) Do I need to retrieve STAUS at 0x18 and verify INTB before loading the data?

    Please see the descriptions of STATUS and INTB pin in section 9.3.4 of the datasheet (shown in screenshot below). If the DRDY2INT bit in the ERROR_CONFIG register is set to b1, the DRDY flag in the STATUS register can be used to indicate when a new conversion result is ready for interrupt driven system designs. If the INTB_DIS bit in the CONFIG register is set to b0, the INTB pin will also assert (active low) when the DRDY flag is set.

    Best regards,

    Jesse