Xilinx RocketIO User Manual page 31

Primitive Attributes
Table 3-2: RocketIO Transceiver Attributes (Continued)
Attribute
CLK_COR_KEEP_IDLE
CLK_COR_REPEAT_WAIT
CLK_COR_SEQ_*_*
CLK_COR_SEQ_2_USE
CLK_COR_SEQ_LEN
CLK_CORRECT_USE
COMMA_10B_MASK
CRC_END_OF_PKT
CRC_FORMAT
CRC_START_OF_PKT
UG024 (v1.5) October 16, 2002
RocketIO™ Transceiver User Guide
TRUE/FALSE controls whether or not the final byte stream must retain at
least one clock correction sequence.
FALSE: Transceiver can remove all clock correction sequences to further
recenter the elastic buffer during clock correction.
TRUE: In the final RXDATA stream, the transceiver must leave at least
one clock correction sequence per continuous stream of clock correction
sequences.
Integer 0 - 31 controls frequency of repetition of clock correction operations.
This attribute specifies the minimum number of RXUSRCLK cycles without
clock correction that must occur between successive clock corrections. If this
attribute is zero, no limit is placed on how frequently clock correction can
occur.
11-bit vectors that define the sequence for clock correction. The attribute
used depends on the CLK_COR_SEQ_LEN and CLK_COR_SEQ_2_USE.
TRUE/FALSE Control use of second clock correction sequence.
FALSE: Clock correction uses only one clock correction sequence defined
by CLK_COR_SEQ_1_1..4.
TRUE: Clock correction uses two clock correction sequences defined by:
CLK_COR_SEQ_1_1..4 and
CLK_COR_SEQ_2_1..4
as further constrained by CLK_COR_SEQ_LEN.
Integer that defines the length of the sequence the transceiver matches to
detect opportunities for clock correction. It also defines the size of the
correction, since the transceiver executes clock correction by repeating or
skipping entire clock correction sequences.
TRUE/FALSE controls the use of clock correction logic.
FALSE: Permanently disable execution of clock correction (rate match-
ing). Clock RXUSRCLK must be frequency-locked with RXRECCLK in
this case.
TRUE: Enable clock correction (normal mode).
This 10-bit vector defines the mask that is ANDed with the incoming
serial-bit stream before comparison against PCOMMA_10B_VALUE and
MCOMMA_10B_VALUE.
NOTE: This attribute is only valid when CRC_FORMAT = USER_MODE.
K28_0, K28_1, K28_2, K28_3, K28_4, K28_5, K28_6, K28_7, K23_7, K27_7,
K29_7, K30_7. End-of-packet (EOP) K-character for USER_MODE CRC.
Must be one of the 12 legal K-character values.
ETHERNET, INFINIBAND, FIBRE_CHAN, USER_MODE CRC algorithm
selection. Modifiable only for GT_AURORA_n, GT_XAUI_n, and
GT_CUSTOM. USER_MODE allows user definition of start-of-packet and
end-of-packet K-characters.
NOTE: This attribute is only valid when CRC_FORMAT = USER_MODE.
K28_0, K28_1, K28_2, K28_3, K28_4, K28_5, K28_6, K28_7, K23_7, K27_7,
K29_7, K30_7. Start-of-packet (SOP) K-character for USER_MODE CRC.
Must be one of the 12 legal K-character values.
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