ATPL230A datasheet(35/122 Pages) ATMEL

Part #	ATPL230A

Description	ATPL Series Power Line Communications Device

PDF	122 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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35 / 122 page

ATPL230A [DATASHEET]

Atmel-43053J-ATPL230A-Datasheet_22-Sep-16

8.3.1.9 Peripheral CRC Polynomial Register

Name:

VCRC_POLY

Address:

0xFF0E (MSB) – 0xFF11 (LSB)

Access:

Read/Write

Reset:

0x04C11DB7

This is a 32 bits register used to store the CRC polynomial mathematical expression. Each register bit location

represents an exponential degree of the polynomial. Meaning that, for a register value of 0x04C11DB7; the

corresponding polynomial expression is x^32 + x^26 + x^23 + x^22 + x^16 + x^12 + x^11 + x^10 + x^8 + x^7 + x^5 +

x^4 + x^2 + x + 1. Note that, the first exponential degree (x^32) is taken by the feedback of the circuit itself.

To configure the system in CRC mode, the bit VCRC_POLY(0) must be set to ‘1’. Otherwise, if VCRC_POLY(0) is set

to ‘0’ the system works in LFSR (Linear Feedback Shift Register) mode.

VCRC_POLY (31:0)

ATPL230A Datasheet(PDF) 35 Page - ATMEL Corporation