Section 14 CRC Operation Circuit (CRC)
Rev. 1.00 Mar. 12, 2008 Page 497 of 1178
REJ09B0403-0100
Section 14 CRC Operation Circuit (CRC)
This LSI has a cyclic redundancy check (CRC) operation circuit to enhance the reliability of data
transfer in high-speed communications, etc. The CRC operation circuit detects errors in data
blocks.
14.1 Features
The features of the CRC operation circuit are listed below.
•
CRC code generated for any desired data length in an 8-bit unit
•
CRC operation executed on eight bits in parallel
•
One of three generating polynomials selectable
•
CRC code generation for LSB-first or MSB-first communication selectable
Figure 14.1 is a block diagram of the CRC operation circuit.
Internal bus
CRC code
generation
circuit
CRCCR
CRCDIR
CRCDOR
Control
signal
[Legend]
CRCCR:
CRCDIR:
CRCDOR:
CRC control register
CRC data input register
CRC data output register
Figure 14.1 Block Diagram of CRC Operation Circuit
Содержание H8S Family
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