Xilinx Virtex-6 FPGA User Manual page 200

Chapter 4: Receiver
Table 4-13: DFETAP1 and RXEQMIX at 3.125 Gb/s for Chip-to-Chip Applications
Nominal Trace
Length on FR4 Loss (dB) @
Substrate 1.5625 GHz
(inches [mm])
13 [330.2] 2.8
20 [508.0] 4.7
30 [762.0] 8.9
42 [1066.8] 11.7
50 [1270.0] 13.0
70 [1778.0] 17.8
Notes:
1. GTX TXDIFFCTRL = 4'b1010, TXPOSTEMPHASIS = 5'b00000, and TXPREEMPHASIS = 4'b0000.
Table 4-14
chip-to-chip applications.
Table 4-14: DFETAP1 and RXEQMIX at 4.25 Gb/s for Chip-to-Chip Applications
Nominal Trace
Length on FR4 Loss (dB) @
Substrate 2.125 GHz
(inches [mm])
13 [330.2] 3.4
20 [508.0] 5.7
30 [762.0] 11.7
42 [1066.8] 14.8
50 [1270.0] 16.1
70 [1778.0] 22.3
Notes:
1. GTX TXDIFFCTRL = 4'b1010, TXPOSTEMPHASIS = 5'b00000, and TXPREEMPHASIS = 4'b0000.
Table 4-15
chip-to-chip applications.
Table 4-15: DFETAP1 and RXEQMIX at 5 Gb/s for Chip-to-Chip Applications
Nominal Trace
Length on FR4 Loss (dB) @
Substrate 2.5 GHz
(inches [mm])
13 [330.2] 3.8
20 [508.0] 6.4
30 [762.0] 13.0
www.BDTIC.com/XILINX
200
RXEQMIX = 000 RXEQMIX = 010 RXEQMIX = 101 RXEQMIX = 110 RXEQMIX = 111
0
0
0 0
0 0
0 0
0
provides DFETAP1 and RXEQMIX settings for 4.25 Gb/s operation for
RXEQMIX = 000 RXEQMIX = 010 RXEQMIX = 101 RXEQMIX = 110 RXEQMIX = 111
0
0
0
10
5
provides DFETAP1 and RXEQMIX settings for 5 Gb/s operation for
RXEQMIX = 000 RXEQMIX = 010 RXEQMIX = 101 RXEQMIX = 110 RXEQMIX = 111
0
5
www.xilinx.com
TAP1
0
0
0
TAP1
0
0
0
0
0
5
TAP1
0
0
0
Virtex-6 FPGA GTX Transceivers User Guide
UG366 (v2.5) January 17, 2011
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0