| AR# |
21355 |
| Part |
HW-Rocket_IO |
| Last Modified |
2008-05-19 00:00:00.0 |
| Status |
Active |
| Keywords |
TXCRCSAMECLOCK, RXCRCSAMECLOCK, MGT, CRC |
Description
Keywords: TXCRCSAMECLOCK, RXCRCSAMECLOCK, MGT, CRC
What are the TX/RXCRCSAMECLOCK attributes in the V-4 MGT CRC block?
Solution
TX/RXCRCSAMECLOCK attributes select the clock source for TX/RXCRCCLK respectively.
TX/RXCRCSAMECLOCK =
TRUE makes the internal CRCCLK the same as the CRC fabric interface clock (TX/RXCRCCLK = TX/RXCRCINTCLK). TX/RXCRCCLK need not be provided in this case. Typically, they are used when both clock frequencies are the same (TX/RXCRCCLOCKDOUBLE = FALSE).
TX/RXCRCSAMECLOCK =
FALSE makes the internal CRCCLK the same as the CRCCLK at the input of the CRC Block. Typically, this is used when the TX/RXCRCCLK is 2x the frequency of TX/RXCRCINTCLK (TX/RXCRCCLOCKDOUBLE = TRUE).
