136 www.xilinx.com RocketIO™ X Transceiver User Guide1-800-255-7778 UG035 (v1.5) November 22, 2004Appendix A: RocketIO X Transceiver Timing ModelRTable A-5: PMA Clock ParametersParameter Function SignalsT GCCK_PADDR/T GCCK_PADDR Control inputs PMAREGADDR[5:0]T GCCK_PINIT/T GCCK _PINIT Control inputs PMAINITT GCCK_PLKSEL/T GCCK _PLKSEL Control inputs PMARXLOCKSELT GCCK_PRW/T GCCK _PRW Control inputs PMAREGRWT GCCK_PSTRB/TGCCK _PSTRB Control inputs PMAREGSTROBET GDCK _PDAT/T GCCK _PDAT Data inputs PMAREGDATAIN[7:0]Notes:1. See Appendix C, “PMA Attribute Programming Bus” for additional timing information.Table A-6: Miscellaneous Clock ParametersParameter Function SignalsT REFPWH Clock pulse width, High state REFCLK(1)T REFPWL Clock pulse width, Low state REFCLK(1)T BREFNPWH Clock pulse width, High state BREFCLKNIN(1)T BREFPPWH Clock pulse width, High state BREFCLKPIN(1)T BREFNPWL Clock pulse width, Low state BREFCLKNIN(1)T BREFPPWL Clock pulse width, Low state BREFCLKPIN(1)T TXPWH Clock pulse width, High state TXUSRCLK (2)T TXPWL Clock pulse width, Low state TXUSRCLK (2)Notes:1. REFCLK is not synchronous to any RocketIO X signals.2. TXUSRCLK is not synchronous to any RocketIO X signals.
