Truth Table Inputs Selection

Input Overview

The inputs can be individually:

• Masked
• Driven by peripherals:
  • Analog comparator output (AC)
  • Timer/Counters waveform outputs (TC)
• Driven by internal events from Event System
• Driven by other CCL sub-modules

Internal Feedback Inputs (FEEDBACK)

When selected (INSELy=FEEDBACK in CCL.LUTnCTRLx), the Sequential (SEQ) output is used as input for the corresponding LUT.

The output from an internal sequential module can be used as input source for the LUT, see figure below for an example for LUT0 and LUT1. The sequential selection for each LUT follows the formula:

IN[2N][i]=SEQ[N]

IN[2N+1][i]=SEQ[N]

With N representing the sequencer number and i=0,1 representing the LUT input index.

For details, refer to Sequential Logic.

Figure 1. Feedback Input Selection

Linked LUT (LINK)

When selecting the LINK input option, the next LUT's direct output is used as the LUT input. In general, LUT[n+1] is linked to the input of LUT[n]. As example LUT1 is the input for LUT0.

Figure 2. Linked LUT Input Selection

Internal Events Inputs Selection (EVENT)

Asynchronous events from the Event System can be used as input to the LUT. Two event input lines (EVENT0 and EVENT1) are available, and can be selected as LUT input. Before selecting the EVENT input option by writing to the LUT CONTROL A or B register (CCL.LUTnCTRLB or LUTnCTRLC), the Event System must be configured.

I/O Pin Inputs (IO)

When selecting the IO option, the LUT input will be connected to its corresponding IO pin. Refer to the I/O Multiplexing section for more details about where the LUTnINy are located.

Figure 3. I/O Pin Input Selection

Peripherals