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Chapter 26
CRC Function
User’s Manual U16702EE3V2UD00
26.3 Registers
(1)
CRC input register (CRCIN)
The CRCIN register is an 8-bit register for setting data.
This register can be read or written in 8-bit units.
Reset input clears this register to 00H.
Figure 26-2:
CRC Input Register (CRCIN) Format
(2)
CRC data register (CRCD)
The CRCD register is a 16-bit register that stores the CRC-CCITT operation results.
This register can be read or written in 16-bit units.
Reset input clears this register to 0000H.
Cautions: 1. Following write to the CRCD register, do not write the CRC calculator output to
the CRCD register during the first write access to the CRCIN register. (Do not load
the operation result.)
2. Through the operation of the CRCIN register, the CRC operation results are saved
to the CRCD register. Therefore, to write to the CRCD register via the internal bus
and then read the written value, read the CRCD register before writing to CRCIN.
Figure 26-3:
CRC Data Register (CRCD) Format
Symbol
7
6
5
4
3
2
1
0
Address
After reset
CRCIN
FFFFF310H
00H
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Symbol
7
6
5
4
3
2
1
0
Address
After reset
CRCD
FFFFF312H
0000H
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
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