cyclic redundancy check

循环冗余校验（Cyclic Redundancy Check，简称CRC），是一种数据传输时对数据的完整性进行校验的方法。它基于多项式运算，在发送数据时生成校验码并将其附加到数据后面，接收数据时再次进行多项式运算检验校验码是否正确，从而判断数据是否出现了传输错误。CRC在计算机通信、磁盘储存、ISO/IEC标准中都得到了广泛应用。

相关问题

SFR comparison and CRC check

SFR comparison and CRC check are two different concepts in computer science.

SFR comparison (Special Function Register comparison) involves comparing the values of special function registers in a microcontroller or microprocessor. These registers are used to control the behavior of the device and communicate with peripherals. By comparing the values of these registers, a programmer can determine the current state of the device and make decisions based on that information.

CRC check (Cyclic Redundancy Check) is a method used to detect errors in data transmission or storage. It involves generating a checksum based on the data being transmitted or stored and comparing it to a previously calculated checksum. If the two values match, the data is assumed to be error-free. If they do not match, an error has occurred and the data must be retransmitted or corrected.

While SFR comparison is used in programming microcontrollers and microprocessors, CRC check is used in data transfer and storage applications such as network communication, file transfer, and data backup.