Xilinx Virtex-5 RocketIO GTP

194 www.xilinx.com Virtex-5 RocketIO GTP Transceiver User Guide
UG196 (v1.3) May 25, 2007
Chapter 8: Cyclic Redundancy Check (CRC)
R
Implementation of the CRC Block
Figure 8-5 shows an implementation of the CRC.
References
Refer to XAPP209 [Ref 12] and XAPP562 [Ref 13] for more information on CRC.
Figure 8-5: CRC Implementation
CRC_CALC
(XOR Bank)
CRCOUT[31:0]
Note:
The CRCOUT is Byte Rotated
and Bit Inverted.
CRCINA[31:0]
{CRCDATAWIDTH64A, CRCDATAWIDTHA}
BANK 2_REG 1
UG196_c8_05_100506
BANK 1_REG 1
BANK 2_REGBANK 1_REG
CRCDATAWIDTH[1:0]
CRCDATAVALID
CRCCLK
CRCINB64[31:0]
CRCRESET
BANK 2_REG 2
BANK 1_REG 2
CRCDATAWIDTH64A
CRCDATAVALID
CRCCLK