Xilinx RocketIO User Manual page 32

R
Table 1-6: RocketIO Transceiver Attributes (Continued)
Attribute
RX_DECODE_USE
RX_LOS_INVALID_INCR
RX_LOS_THRESHOLD
RX_LOSS_OF_SYNC_FSM
SERDES_10B
TERMINATION_IMP
TX_BUFFER_USE
TX_CRC_FORCE_VALUE
TX_DIFF_CTRL
TX_PREEMPHASIS
32
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.
TRUE/FALSE denotes the nature of RXLOSSOFSYNC output.
TRUE: RXLOSSOFSYNC outputs the state of the FSM bits.
See "RXLOSSOFSYNC," page
Denotes whether the reference clock is 1/10 or 1/20 the serial bit rate.
TRUE: 1/10
FALSE: 1/20
FALSE supports a serial bitstream range of 1.0 Gb/s to 3.125 Gb/s.
TRUE supports a range of 600 Mb/s to 1.0 Gb/s.
See "Half-Rate Clocking Scheme," page
Integer (50 or 75). Termination impedance of either 50Ω or 75Ω. Refers to both the
RX and TX.
Always set to TRUE.
8-bit vector. Value to corrupt TX CRC computation when input
TXFORCECRCERR is High. This value is XORed with the correctly computed
CRC value, corrupting the CRC if TX_CRC_FORCE_VALUE is nonzero. This can
be used to test CRC error detection in the receiver downstream.
An integer value (400, 500, 600, 700, or 800) representing 400 mV, 500 mV,
600 mV, 700 mV, or 800 mV of voltage difference between the differential lines.
Twice this value is the peak-peak voltage.
An integer value (0-3) that sets the output driver pre-emphasis to improve output
waveform shaping for various load conditions. Larger value denotes stronger pre-
emphasis. See pre-emphasis values in
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Chapter 1: RocketIO Transceiver Overview
Description
26, for details.
55.
Table 3-2, page 102.
RocketIO™ Transceiver User Guide
UG024 (v2.3.2) June 24, 2004