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2 Drawing a Schematic
Getting started with logic design.
2.1 Components in CLB Synthesizer
Following are the components available in CLB Synthesizer.
2.1.6 Constants
A source of a fixed signal.

CLB Synthesizer
The PIC16F13145 family of microcontrollers introduce a new peripheral, the Configurable Logic Block (CLB).
1 Getting Started
Use Cases to hit the ground running with the CLB.
2 Drawing a Schematic
Getting started with logic design.
- 2.1 Components in CLB Synthesizer
  Following are the components available in CLB Synthesizer.
  - 2.1.1 Ports
  - 2.1.2 Logic Gates
    The building blocks of a configurable logic design.
  - 2.1.3 Flip-Flops
    Building blocks for synchronous logic designs.
  - 2.1.4 Multiplexers
    Switching between signals.
  - 2.1.5 Look-up Tables
    Manually configured logic functions.
  - 2.1.6 Constants
    A source of a fixed signal.
  - 2.1.7 Net Labels
    Using the same signal in many places in a design.
- 2.2 Drawing a Basic Schematic
  How to get started with a logic design.
3 Status of the Synthesis Process
Understanding the synthesis status indicator
4 Tips and Tricks
Productivity tips and tricks for the CLB Synthesizer.
5 Interacting with Peripherals and the CPU
How to make connections between the CLB, CPU and other peripheral modules.
6 Storing and Retrieving Logic Designs
The circuit drawings and verilog content of your logic design can be saved to a file in json format
7 Using Hierarchical Modules
Complex logic designs can increase their readability, and be reused by placing logic functions in modules, and then using that module elsewhere in the design.
8 Libraries and Modules
Making a library of modules that can be easily re-used.
9 Advanced Topics
Additional reading for advanced users.
10 Known Issues and Change Log
If you experience unexpected behavior, read the known issues list here.
11 Revision History
Microchip Information

2.1.6 Constants

A source of a fixed signal.

The CLB Synthesizer provides several ways to give a fixed signal to an input:

Individual constant output bits can be connected to inputs

Multi-signal constants

Configure the number of bits and their values in the properties panel

A Zero port can also be used to provide a constant by using an input MUX position

Note: Although constants can be useful in many cases, they can also be a source of problems. The input logic is optimized into a logical equivalent during the synthesis process. When using constants, this has a major impact. The "zero port" is an exception since it is treated as any other input signal with an unknown value. For more information, see Synthesis and Place-and-Route Process.