CSA侦测原理（二）——Migrating from CSR to CSA

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这个是Migrating from CSR to CSA的笔记，有助于理解csa的侦测原理，还有csa模块各个参数的解释（包括baseline的update，IDACseting等）。我理解csa这个文档给我了很多的帮助。
The CapSense Successive Approximation User Module offers many advantages over the CSR. CSA has better noise immunity from RF sources that can cause false button presses in a capacitive sensing system. CSA also gives the user more sensitivity to detect smaller capacitive changes, allowing users to use thicker overlays on their end-product. New APIs make it easier for the user to set up CSA projects, and automatic IDAC calibration is included at startup. CSA is an improved method over CSR for capacitive sensing using Cypress’ PSoC devices.