- PIC MCUs
- AVR MCUs
- 16-bit Pulse Width Modulation
- 24-bit Signal Measurement Timer
- Angular Timer
- Configurable Logic Cell
- Cyclic Redundancy Check
- Complementary Waveform Generator
- Event System
- Hardware Limit Timer
- High Endurance Flash
- Math Accelerator
- Numerically Controlled Oscillator
- Peripheral Pin Select
- Temperature Indicator
- Windowed Watch Dog Timer
- Intelligent Analog
- Core Independent
- Functional Safety
- Development Tools
8-bit Development Tools
Cyclic Redundancy Check (CRC/SCAN)
What is CRC?
Whether you are trying to obtain regulatory compliance or to simply design a robust and reliable product, functional safety is an absolute necessity. Several methods can be used to ensure the functional safety of end products – of them, Cyclic Redundancy Check (CRC) is a powerful technique commonly used to check integrity in digital data. CRC generates an initial checksum of the data in memory that can be later compared with the calculated checksum for
Why is CRC used?
Cyclic Redundancy Check, or CRC, is a vital element of functional safety, and it is one of the key methods required to meet IEC or UL safety standards such as Class B (IEC 60730). Implementation of functional safety techniques is required by law for almost all consumer appliances and industrial electronics.
How does CRC work (in PIC® and AVR® MCUs)?
Many modern PIC and AVR MCUs have a built-in hardware module for Cyclic Redundancy Check. This allows faster and low-power operation for CRC calculation without extra memory usage or an additional CPU cycle. This hardware module supports up to 16-bit
polynomial and implemented with Linear Feedback Shift Register (LFSR) to generate