Xilinx RocketIO User Manual page 32

R
Table 3-2: RocketIO Transceiver Attributes (Continued)
Attribute
DEC_MCOMMA_DETECT
DEC_PCOMMA_DETECT
DEC_VALID_COMMA_ONLY
MCOMMA_10B_VALUE
MCOMMA_DETECT
PCOMMA_10B_VALUE
PCOMMA_DETECT
(1)
REF_CLK_V_SEL
RX_BUFFER_USE
RX_CRC_USE,
TX_CRC_USE
RX_DATA_WIDTH,
TX_DATA_WIDTH
RX_DECODE_USE
RX_LOS_INVALID_INCR
RX_LOS_THRESHOLD
32
TRUE/FALSE controls the raising of per-byte flag RXCHARISCOMMA on
minus-comma.
TRUE/FALSE controls the raising of per-byte flag RXCHARISCOMMA on
plus-comma.
TRUE/FALSE controls the raising of RXCHARISCOMMA on an invalid
comma.
FALSE: Raise RXCHARISCOMMA on:
0011111xxx
(if DEC_PCOMMA_DETECT is TRUE)
and/or on:
1100000xxx
(if DEC_MCOMMA_DETECT is TRUE)
regardless of the settings of the xxx bits.
TRUE: Raise RXCHARISCOMMA only on valid characters that are in the
8B/10B translation.
This 10-bit vector defines minus-comma for the purpose of raising
RXCOMMADET and realigning the serial bit stream byte boundary. This
definition does not affect 8B/10B encoding or decoding. Also see
COMMA_10B_MASK.
TRUE/FALSE indicates whether to raise or not raise the RXCOMMADET
when minus-comma is detected.
This 10-bit vector defines plus-comma for the purpose of raising
RXCOMMADET and realigning the serial bit stream byte boundary. This
definition does not affect 8B/10B encoding or decoding. Also see
COMMA_10B_MASK.
TRUE/FALSE indicates whether to raise or not raise the RXCOMMADET
when plus-comma is detected.
1/0:
1: Selects the BREFCLKs for 2.5 Gb/s or greater serial speeds.
0: Selects the REFCLK for serial speeds under 2.5 Gb/s.
Always set to TRUE.
TRUE/FALSE determines if CRC is used or not.
Integer (1, 2, or 4). Relates to the data width of the FPGA fabric interface.
This determines if the 8B/10B decoding is bypassed. FALSE denotes that it
is bypassed.
Power of two in a range of 1 to 128 that denotes the number of valid
characters required to "cancel out" appearance of one invalid character for
loss of sync determination.
Power of two in a range of 4 to 512. When divided by
RX_LOS_INVALID_INCR, denotes the number of invalid characters
required to cause FSM transition to "sync lost" state.
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Chapter 3: Digital Design Considerations
Description
UG024 (v1.5) October 16, 2002
RocketIO™ Transceiver User Guide