invalid cyclic redundancy check (ICRC)
A count that indicates that a frame has been received with an invalid value of a cyclic redundancy check.A cyclic redundancy
check is performed by reading the data, calculating the cyclic redundancy check character, and comparing its value to the
cyclic check character already present in the data. If the values are equal, the new data is presumed to be the same as the
old data. If the values are not equal, an error is received, and the data is resent.