upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 794

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

26.3 Registers
(1)
(2)
Cautions: 1. Following write to the CRCD register, do not write the CRC calculator output to
794
Symbol
Symbol
CRCIN
CRCD
R/W
R/W
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.
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.
2. Through the operation of the CRCIN register, the CRC operation results are saved
R/W
R/W
7
7
the CRCD register during the first write access to the CRCIN register. (Do not load
the operation result.)
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.
R/W
R/W
6
6
Figure 26-2: CRC Input Register (CRCIN) Format
Figure 26-3: CRC Data Register (CRCD) Format
R/W
R/W
5
5
User’s Manual U16702EE3V2UD00
Chapter 26 CRC Function
R/W
R/W
4
4
R/W
R/W
3
3
R/W
R/W
2
2
R/W
R/W
1
1
R/W
R/W
0
0
FFFFF310H
FFFFF312H
Address
Address
After reset
After reset
0000H
00H