M16CSLASH29 datasheet(338/499 Pages) RENESAS

338 / 499 page

18. CRC Calculation Circuit

page 314

Figure 18.2. CRCD, CRCIN, CRCMR, CRCSAR Register

Symbol

Address

After Reset

CRCD

03BD16 to 03BC16

Undefined

b0 b7

(b15)

(b8)

CRC Data Register

Function

Setting Range

000016 to FFFF16

Symbol

Address

After Reset

CRCIN

03BE16

Undefined

CRC Input Register

Data input

Function

0016 to FF16

Setting Range

CRC calculation result output

Symbol

Address

After Reset

CRCMR

03B616

0XXXXXX02

CRC Mode Register

CRC mode polynomial

selection bit

Function

0: LSB first

1: MSB first

Bit name

Bit symbol

CRC mode selection bit

CRCPS

CRCMS

Nothing is assigned.

Write "0" when writing to this bit. The value is indeterminate if read.

0: X16+X12+X5+1 (CRC-CCITT)

1: X16+X15+X2+1 (CRC-16)

CRC mode polynomial

selection bit

Function

0: LSB first

1: MSB first

Bit Name

Bit Symbol

CRC mode selection bit

CRCPS

CRCMS

Nothing is assigned. If necessary, set to 0.

When read, the content is undefined

0: X16+X12+X5+1 (CRC-CCITT)

1: X16+X15+X2+1 (CRC-16)

(b6-b1)

Symbol

Address

After Reset

CRCSAR

03B516 to 03B416

00XXXXXX XXXXXXXX2

b0 b7

(b15)

(b8)

SFR Snoop Address Register

CRC mode polynomial

selection bit

Function

Bit Name

Bit Symbol

CRCSR

Nothing is assigned. If necessary, set to 0.

When read, the content is undefined

SFR address to snoop

Function

0: Disabled

1: Enabled(1)

CRCSW

CRCSAR9-0

CRC snoop on read

enable bit

CRC snoop on write

enable bit

0: Disabled

1: Enabled(1)

(b13-b10)

NOTE:

1. Set bits CRCSR and CRCSW to 0 if the PLC07 bit in the PLC0 register is set to 1 (PLL on) and the PM20 bit in

the PM2 register is set to 0 (SFR access 2 wait).

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