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About PCA8885 LOW POWER MODE

Question asked by 后勇 徐 on Feb 11, 2019
Latest reply on Apr 22, 2019 by Jose Alberto Reyes Morales

Hi,

I have a mass remote product, this remote include with LCD and touch screen【PCA8885 IC】

My design ideas are as follows

  1. The touch function of the remote can enter the low power mode【Sleep mode】 when no user operate it.
  2. The remote can exit the sleep mode immediately as soon as possible when user touch it

I read the SPEC of PCA8885 to know the sleep mode

Question is:

  1. Whether my idea can be achieved? If not ,why?
  2. I have some doubts about the contents from SPEC as follows

The charges in the CPC capacitors however cannot be guaranteed, as there is no limitation on the duration of the sleep mode. Therefore the analog part has to perform a normal start-up phase, including the fast start procedure for the CPC capacitor charging

Question

  1. Whether the normal start-up phase, including the fast start procedure for the CPC capacitor charging can be guaranteed or not?
  2. what about the IDD(sleep) If the normal start-up phase, including the fast start procedure for the CPC capacitor charging can be guaranteed。

The other question is :

what the difference between idle state and sleep mode?

Thanks

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