AN3404

ProxSense and low power modes

Doc ID 018847 Rev 3

21/30

6.3.4

Inactive state

to avoid driving noise on these lines This also allows consumption to be reduced through the

PXS_RX and PXS_TX pins compared to if they were configured in floating state.

6.3.5

Receiver disabling

Between acquisitions, if the ProxSense is not switched off by resetting the PXS_EN bit in the

PXS control register 1 (PXS_CR1) or by setting the LOW_POWER bit, there is a static

consumption which depends on the number of enabled receivers. To reduce this

consumption, it is worth disabling all the receivers by resetting the PXS receiver enable

register (PXS_RXENR).

This is particularly relevant for applications that need a fast response time and which cannot

use the LOW_POWER bit option due to the stabilization time.