Xilinx Virtex-5 RocketIO GTP User Manual page 316

Appendix F: Advanced Clocking
Table F-2: GTP Tile Utilization (Continued)
GTP_DUAL
316
CLKIN
REFCLK_SEL
Tile Options
Clock 1
1x1
Clock 2
011
C
Clock 3
001
Clock 4
xx0
Clock 1
1x1
D
Clock 2
001
Clock 4
xx0
Clock 1
1x1
E
Clock 2
001
Clock 1
011
F
Clock 2
001
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CLKNORTH_SEL
1: Drive clock 2
northbound to tile B.
0: Forward clock 1
northbound to tile C.
0: Forward clock 1
northbound to tile D.
1: Drive clock 1
northbound to tile E.
Virtex-5 RocketIO GTP Transceiver User Guide
R
CLKSOUTH_SEL
1: Drive clock 2
southbound to tile D.
0: Forward clock 2
southbound to tile E.
0: Forward clock 2
southbound to tile F.
Don't Care: Clock 2 can
not be sent more than
three tiles from where it
originates.
UG196 (v1.3) May 25, 2007