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FDC2114 Event timing and SD, INTB

na na78
Guru 16770 points
Other Parts Discussed in Thread: FDC2114

Hi

We are about to design custom board with FDC2114.

Could you advise me about the following?

1. Can we keep the SD pin to high, anytime?

2. When should we use INTB pin?  Can we make this pin unused?

3. Are there recommended sequences to execute the following event?

・Sleep Mode

・Power-on reset (POR)

・Entering shutdown mode

・S/W reset

・I2C read of the STATUS registers.

BestRegards

  • 0
    TI__Expert 6480 points

    Hi,

    1. If the SD pin is set high, the device will enter shutdown mode. In order to exit shutdown mode, the SD pin must be set low.

    2. INTB can be used to notify the host of changes in the system status. However, if you do not want to use it, you may leave it floating as long as you ensure that the CONFIG.INTB_DIS is set to b1 as noted on pg20 of the datasheet. The INTB pin will then internally be driven high.

    3. Please take a look at the datasheet - it will give you more information on the sequences to execute those given events.

    Thanks,

    Rachel