Placing the ALT2GXB on the EP2SGX90FF1508C3............

[Altera_Forum]

Hi all, 

 I am using the ALT2GXB in my design with the Stratix II GX EP2SGX90FF1508C3, I used two ALT2GXB one as transmitter and other as receiver. I connected the serial line TX_dataout and RX_datain to the pin locations G4(GXB_TX_3P) & G1(GXB_RX_3P) and selected the IO standard as the 1.5 PCML.  While doing the Fitting i got the following errors...  Error: Can't place I/O "tx_dataout" in location Pin_G4 because the location assignment requires  GXB Central Control Unit "ALT_TX:inst|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" to be  placed in location GXBCMU_X89_Y60_N0, but GXB Central Control Unit  "ALT_TX:inst|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" has a conflict location assignment  GXBCMU_X89_Y9_N0   Error: Can't place GXB Receiver channel "alt2gxb1:inst1|alt2gxb:alt2gxb_component|channel_rec[0].receive"  in location GXBRX_X89_Y46_N1 because the location assignment requires GXB Central Control Unit  "alt2gxb1:inst1|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" to be placed in location  GXBCMU_X89_Y43_N0, but GXB Central Control Unit  "alt2gxb1:inst1|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" has a conflict location  assignment GXBCMU_X89_Y9_N0   Error: Can't place I/O "rx_datain" in location Pin_G1 because the location assignment requires  GXB Central Control Unit "alt2gxb1:inst1|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" to be  placed in location GXBCMU_X89_Y60_N0, but GXB Central Control Unit  "alt2gxb1:inst1|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" has a conflict location assignment  GXBCMU_X89_Y9_N0   Error: Can't fit design in device  Then I assigned the "alt2gxb1:inst1|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" to location GXBCMU_X89_Y60_N0  and "ALT_TX:inst|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" to be  placed in location GXBCMU_X89_Y60_N0  the error came like this........    Error: Can't place GXB Central Control Unit "alt2gxb1:inst1|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" in location GXBCMU_X89_Y60_N0. That location is already occupied by node "ALT_TX:inst|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit".  Error: The Quartus II software could not combine the following GXB Central Control Unit(s) due to inconsistent parameters and/or input connections  Error: Parameter "DPRIO configuration mode" must have the same value  Info: Atom "ALT_TX:inst|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" has a value of "pma_electricals = true"  Info: Atom "alt2gxb1:inst1|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" has a value of "pma_electricals = false"  Info: Atom "ALT_TX:inst|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" has a value of "channel_internals = true"  Info: Atom "alt2gxb1:inst1|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" has a value of "channel_internals = false"  Error: Input port "QUADRESET" must be driven by the same source  Info: Atom "ALT_TX:inst|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" is driven by source "gxb_powerdown"  Info: Atom "alt2gxb1:inst1|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" is driven by source "rx_gxb_powerdown"  Error: Input port "DPRIOCLK" must be driven by the same source  Info: Atom "ALT_TX:inst|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" is driven by source "inclk0"  Info: Atom "alt2gxb1:inst1|alt2gxb:alt2gxb_component|channel_quad[0].cent_unit" is driven by source "gnd"   What is to be done please reply.......