Figure 48-10. LFSR (Linear Feedback Shift Registers)
For using PRBS method generating the SSC output bit, LFSR circuit is involved for this
implementation.
For the example in the figure, its eigenpolynomial is:
.
48.6 Usage Guide
48.6.1 TSI Interrupts
The TSI has multiple sources of interrupt requests. However, these sources are OR'd
together to generate a single interrupt request. When a TSI interrupt occurs, read the TSI
status register to determine the exact interrupt source.
48.6.2 How to use TSI module
There are several steps as below.
• Initiate TSI module by configuring registers
• Start TSI scan by hardware or software trigger
• Read the TSI result once TSI scan done (end of scan)
• Process the TSI result raw data to determine whether there is a touch occur
48.6.2.1 Initial Sequence Flowchart
The following figure shows the flowchart of TSI module initialization.
Chapter 48 Touch Sensing Input (TSI)
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