See Spartan 3 documentation for functional description.
The data for a CLB is located in the same bitstream tile as the associated INT tile.
Cells: 1
virtex4 CLB bel SLICE0
| Pin | Direction | Wires | 
| BX | input | IMUX.BYP0 | 
| BY | input | IMUX.BYP4 | 
| CE | input | IMUX.CE0 | 
| CLK | input | IMUX.CLK0 | 
| F1 | input | IMUX.IMUX11 | 
| F2 | input | IMUX.IMUX10 | 
| F3 | input | IMUX.IMUX9 | 
| F4 | input | IMUX.IMUX8 | 
| G1 | input | IMUX.IMUX3 | 
| G2 | input | IMUX.IMUX2 | 
| G3 | input | IMUX.IMUX1 | 
| G4 | input | IMUX.IMUX0 | 
| SR | input | IMUX.SR0 | 
| X | output | OUT.BEST0 | 
| XB | output | OUT.HALF.BOT4 | 
| XMUX | output | OUT.HALF.BOT0 | 
| XQ | output | OUT.SEC0 | 
| Y | output | OUT.BEST4 | 
| YB | output | OUT.HALF.BOT6 | 
| YMUX | output | OUT.HALF.BOT2 | 
| YQ | output | OUT.SEC4 | 
 
virtex4 CLB bel SLICE1
| Pin | Direction | Wires | 
| BX | input | IMUX.BYP5 | 
| BY | input | IMUX.BYP1 | 
| CE | input | IMUX.CE1 | 
| CLK | input | IMUX.CLK1 | 
| F1 | input | IMUX.IMUX15 | 
| F2 | input | IMUX.IMUX14 | 
| F3 | input | IMUX.IMUX13 | 
| F4 | input | IMUX.IMUX12 | 
| G1 | input | IMUX.IMUX7 | 
| G2 | input | IMUX.IMUX6 | 
| G3 | input | IMUX.IMUX5 | 
| G4 | input | IMUX.IMUX4 | 
| SR | input | IMUX.SR1 | 
| X | output | OUT.BEST1 | 
| XB | output | OUT.HALF.BOT5 | 
| XMUX | output | OUT.HALF.BOT1 | 
| XQ | output | OUT.SEC1 | 
| Y | output | OUT.BEST5 | 
| YB | output | OUT.HALF.BOT7 | 
| YMUX | output | OUT.HALF.BOT3 | 
| YQ | output | OUT.SEC5 | 
 
virtex4 CLB bel SLICE2
| Pin | Direction | Wires | 
| BX | input | IMUX.BYP2 | 
| BY | input | IMUX.BYP6 | 
| CE | input | IMUX.CE2 | 
| CLK | input | IMUX.CLK2 | 
| F1 | input | IMUX.IMUX24 | 
| F2 | input | IMUX.IMUX25 | 
| F3 | input | IMUX.IMUX26 | 
| F4 | input | IMUX.IMUX27 | 
| G1 | input | IMUX.IMUX16 | 
| G2 | input | IMUX.IMUX17 | 
| G3 | input | IMUX.IMUX18 | 
| G4 | input | IMUX.IMUX19 | 
| SR | input | IMUX.SR2 | 
| X | output | OUT.BEST2 | 
| XB | output | OUT.HALF.TOP4 | 
| XMUX | output | OUT.HALF.TOP0 | 
| XQ | output | OUT.SEC2 | 
| Y | output | OUT.BEST6 | 
| YB | output | OUT.HALF.TOP6 | 
| YMUX | output | OUT.HALF.TOP2 | 
| YQ | output | OUT.SEC6 | 
 
virtex4 CLB bel SLICE3
| Pin | Direction | Wires | 
| BX | input | IMUX.BYP7 | 
| BY | input | IMUX.BYP3 | 
| CE | input | IMUX.CE3 | 
| CLK | input | IMUX.CLK3 | 
| F1 | input | IMUX.IMUX28 | 
| F2 | input | IMUX.IMUX29 | 
| F3 | input | IMUX.IMUX30 | 
| F4 | input | IMUX.IMUX31 | 
| G1 | input | IMUX.IMUX20 | 
| G2 | input | IMUX.IMUX21 | 
| G3 | input | IMUX.IMUX22 | 
| G4 | input | IMUX.IMUX23 | 
| SR | input | IMUX.SR3 | 
| X | output | OUT.BEST3 | 
| XB | output | OUT.HALF.TOP5 | 
| XMUX | output | OUT.HALF.TOP1 | 
| XQ | output | OUT.SEC3 | 
| Y | output | OUT.BEST7 | 
| YB | output | OUT.HALF.TOP7 | 
| YMUX | output | OUT.HALF.TOP3 | 
| YQ | output | OUT.SEC7 | 
 
virtex4 CLB bel wires
| Wire | Pins | 
| IMUX.SR0 | SLICE0.SR | 
| IMUX.SR1 | SLICE1.SR | 
| IMUX.SR2 | SLICE2.SR | 
| IMUX.SR3 | SLICE3.SR | 
| IMUX.CLK0 | SLICE0.CLK | 
| IMUX.CLK1 | SLICE1.CLK | 
| IMUX.CLK2 | SLICE2.CLK | 
| IMUX.CLK3 | SLICE3.CLK | 
| IMUX.CE0 | SLICE0.CE | 
| IMUX.CE1 | SLICE1.CE | 
| IMUX.CE2 | SLICE2.CE | 
| IMUX.CE3 | SLICE3.CE | 
| IMUX.BYP0 | SLICE0.BX | 
| IMUX.BYP1 | SLICE1.BY | 
| IMUX.BYP2 | SLICE2.BX | 
| IMUX.BYP3 | SLICE3.BY | 
| IMUX.BYP4 | SLICE0.BY | 
| IMUX.BYP5 | SLICE1.BX | 
| IMUX.BYP6 | SLICE2.BY | 
| IMUX.BYP7 | SLICE3.BX | 
| IMUX.IMUX0 | SLICE0.G4 | 
| IMUX.IMUX1 | SLICE0.G3 | 
| IMUX.IMUX2 | SLICE0.G2 | 
| IMUX.IMUX3 | SLICE0.G1 | 
| IMUX.IMUX4 | SLICE1.G4 | 
| IMUX.IMUX5 | SLICE1.G3 | 
| IMUX.IMUX6 | SLICE1.G2 | 
| IMUX.IMUX7 | SLICE1.G1 | 
| IMUX.IMUX8 | SLICE0.F4 | 
| IMUX.IMUX9 | SLICE0.F3 | 
| IMUX.IMUX10 | SLICE0.F2 | 
| IMUX.IMUX11 | SLICE0.F1 | 
| IMUX.IMUX12 | SLICE1.F4 | 
| IMUX.IMUX13 | SLICE1.F3 | 
| IMUX.IMUX14 | SLICE1.F2 | 
| IMUX.IMUX15 | SLICE1.F1 | 
| IMUX.IMUX16 | SLICE2.G1 | 
| IMUX.IMUX17 | SLICE2.G2 | 
| IMUX.IMUX18 | SLICE2.G3 | 
| IMUX.IMUX19 | SLICE2.G4 | 
| IMUX.IMUX20 | SLICE3.G1 | 
| IMUX.IMUX21 | SLICE3.G2 | 
| IMUX.IMUX22 | SLICE3.G3 | 
| IMUX.IMUX23 | SLICE3.G4 | 
| IMUX.IMUX24 | SLICE2.F1 | 
| IMUX.IMUX25 | SLICE2.F2 | 
| IMUX.IMUX26 | SLICE2.F3 | 
| IMUX.IMUX27 | SLICE2.F4 | 
| IMUX.IMUX28 | SLICE3.F1 | 
| IMUX.IMUX29 | SLICE3.F2 | 
| IMUX.IMUX30 | SLICE3.F3 | 
| IMUX.IMUX31 | SLICE3.F4 | 
| OUT.BEST0 | SLICE0.X | 
| OUT.BEST1 | SLICE1.X | 
| OUT.BEST2 | SLICE2.X | 
| OUT.BEST3 | SLICE3.X | 
| OUT.BEST4 | SLICE0.Y | 
| OUT.BEST5 | SLICE1.Y | 
| OUT.BEST6 | SLICE2.Y | 
| OUT.BEST7 | SLICE3.Y | 
| OUT.SEC0 | SLICE0.XQ | 
| OUT.SEC1 | SLICE1.XQ | 
| OUT.SEC2 | SLICE2.XQ | 
| OUT.SEC3 | SLICE3.XQ | 
| OUT.SEC4 | SLICE0.YQ | 
| OUT.SEC5 | SLICE1.YQ | 
| OUT.SEC6 | SLICE2.YQ | 
| OUT.SEC7 | SLICE3.YQ | 
| OUT.HALF.BOT0 | SLICE0.XMUX | 
| OUT.HALF.BOT1 | SLICE1.XMUX | 
| OUT.HALF.BOT2 | SLICE0.YMUX | 
| OUT.HALF.BOT3 | SLICE1.YMUX | 
| OUT.HALF.BOT4 | SLICE0.XB | 
| OUT.HALF.BOT5 | SLICE1.XB | 
| OUT.HALF.BOT6 | SLICE0.YB | 
| OUT.HALF.BOT7 | SLICE1.YB | 
| OUT.HALF.TOP0 | SLICE2.XMUX | 
| OUT.HALF.TOP1 | SLICE3.XMUX | 
| OUT.HALF.TOP2 | SLICE2.YMUX | 
| OUT.HALF.TOP3 | SLICE3.YMUX | 
| OUT.HALF.TOP4 | SLICE2.XB | 
| OUT.HALF.TOP5 | SLICE3.XB | 
| OUT.HALF.TOP6 | SLICE2.YB | 
| OUT.HALF.TOP7 | SLICE3.YB | 
 
| SLICE0:CY0F | 
0.20.17 | 
0.20.18 | 
0.20.16 | 
| SLICE1:CY0F | 
0.19.17 | 
0.19.18 | 
0.20.15 | 
| SLICE2:CY0F | 
0.20.57 | 
0.20.58 | 
0.20.56 | 
| SLICE3:CY0F | 
0.19.57 | 
0.19.58 | 
0.20.55 | 
| 1 | 
0 | 
0 | 
0 | 
| 0 | 
0 | 
0 | 
1 | 
| PROD | 
0 | 
1 | 
0 | 
| F2 | 
1 | 
0 | 
0 | 
| F3 | 
1 | 
0 | 
1 | 
| BX | 
1 | 
1 | 
0 | 
 
| SLICE0:CY0G | 
0.20.20 | 
0.20.21 | 
0.20.23 | 
| SLICE1:CY0G | 
0.20.24 | 
0.19.21 | 
0.19.22 | 
| SLICE2:CY0G | 
0.20.60 | 
0.20.61 | 
0.20.63 | 
| SLICE3:CY0G | 
0.20.64 | 
0.19.61 | 
0.19.62 | 
| 1 | 
0 | 
0 | 
0 | 
| 0 | 
0 | 
0 | 
1 | 
| PROD | 
0 | 
1 | 
0 | 
| G2 | 
1 | 
0 | 
0 | 
| G3 | 
1 | 
0 | 
1 | 
| BY | 
1 | 
1 | 
0 | 
 
| SLICE0:CYINIT | 
0.21.17 | 
| SLICE1:CYINIT | 
0.19.16 | 
| SLICE2:CYINIT | 
0.21.57 | 
| SLICE3:CYINIT | 
0.19.56 | 
| BX | 
0 | 
| CIN | 
1 | 
 
| SLICE0:DIF_MUX | 
0.20.2 | 
| SLICE2:DIF_MUX | 
0.20.39 | 
| ALT | 
0 | 
| BX | 
1 | 
 
| SLICE0:DIG_MUX | 
0.20.35 | 
| SLICE2:DIG_MUX | 
0.20.76 | 
| ALT | 
0 | 
| BY | 
1 | 
 
| SLICE0:DXMUX | 
0.18.9 | 
0.18.7 | 
0.18.2 | 
0.18.0 | 
0.20.3 | 
| SLICE1:DXMUX | 
0.18.10 | 
0.18.13 | 
0.18.12 | 
0.18.11 | 
0.20.4 | 
| SLICE2:DXMUX | 
0.18.72 | 
0.18.71 | 
0.18.70 | 
0.18.68 | 
0.20.43 | 
| SLICE3:DXMUX | 
0.18.46 | 
0.18.44 | 
0.18.45 | 
0.18.47 | 
0.20.44 | 
| X | 
0 | 
0 | 
0 | 
0 | 
0 | 
| F5 | 
0 | 
0 | 
0 | 
1 | 
1 | 
| XB | 
0 | 
0 | 
1 | 
0 | 
1 | 
| FXOR | 
0 | 
1 | 
0 | 
0 | 
1 | 
| BX | 
1 | 
0 | 
0 | 
0 | 
1 | 
 
| SLICE0:DYMUX | 
0.18.8 | 
0.18.14 | 
0.18.15 | 
0.18.5 | 
0.20.31 | 
| SLICE1:DYMUX | 
0.18.41 | 
0.18.40 | 
0.18.43 | 
0.18.42 | 
0.20.32 | 
| SLICE2:DYMUX | 
0.18.77 | 
0.18.67 | 
0.18.69 | 
0.18.74 | 
0.20.71 | 
| SLICE3:DYMUX | 
0.18.66 | 
0.18.79 | 
0.18.65 | 
0.18.64 | 
0.20.72 | 
| Y | 
0 | 
0 | 
0 | 
0 | 
0 | 
| FX | 
0 | 
0 | 
0 | 
1 | 
1 | 
| YB | 
0 | 
0 | 
1 | 
0 | 
1 | 
| GXOR | 
0 | 
1 | 
0 | 
0 | 
1 | 
| BY | 
1 | 
0 | 
0 | 
0 | 
1 | 
 
| SLICE0:F | 
0.21.0 | 
0.21.1 | 
0.21.2 | 
0.21.3 | 
0.21.4 | 
0.21.5 | 
0.21.6 | 
0.21.7 | 
0.21.8 | 
0.21.9 | 
0.21.10 | 
0.21.11 | 
0.21.12 | 
0.21.13 | 
0.21.14 | 
0.21.15 | 
| SLICE0:G | 
0.21.23 | 
0.21.24 | 
0.21.25 | 
0.21.26 | 
0.21.27 | 
0.21.28 | 
0.21.29 | 
0.21.30 | 
0.21.31 | 
0.21.32 | 
0.21.33 | 
0.21.34 | 
0.21.35 | 
0.21.36 | 
0.21.37 | 
0.21.38 | 
| SLICE1:F | 
0.19.0 | 
0.19.1 | 
0.19.2 | 
0.19.3 | 
0.19.4 | 
0.19.5 | 
0.19.6 | 
0.19.7 | 
0.19.8 | 
0.19.9 | 
0.19.10 | 
0.19.11 | 
0.19.12 | 
0.19.13 | 
0.19.14 | 
0.19.15 | 
| SLICE1:G | 
0.19.23 | 
0.19.24 | 
0.19.25 | 
0.19.26 | 
0.19.27 | 
0.19.28 | 
0.19.29 | 
0.19.30 | 
0.19.31 | 
0.19.32 | 
0.19.33 | 
0.19.34 | 
0.19.35 | 
0.19.36 | 
0.19.37 | 
0.19.38 | 
| SLICE2:F | 
0.21.40 | 
0.21.41 | 
0.21.42 | 
0.21.43 | 
0.21.44 | 
0.21.45 | 
0.21.46 | 
0.21.47 | 
0.21.48 | 
0.21.49 | 
0.21.50 | 
0.21.51 | 
0.21.52 | 
0.21.53 | 
0.21.54 | 
0.21.55 | 
| SLICE2:G | 
0.21.63 | 
0.21.64 | 
0.21.65 | 
0.21.66 | 
0.21.67 | 
0.21.68 | 
0.21.69 | 
0.21.70 | 
0.21.71 | 
0.21.72 | 
0.21.73 | 
0.21.74 | 
0.21.75 | 
0.21.76 | 
0.21.77 | 
0.21.78 | 
| SLICE3:F | 
0.19.40 | 
0.19.41 | 
0.19.42 | 
0.19.43 | 
0.19.44 | 
0.19.45 | 
0.19.46 | 
0.19.47 | 
0.19.48 | 
0.19.49 | 
0.19.50 | 
0.19.51 | 
0.19.52 | 
0.19.53 | 
0.19.54 | 
0.19.55 | 
| SLICE3:G | 
0.19.63 | 
0.19.64 | 
0.19.65 | 
0.19.66 | 
0.19.67 | 
0.19.68 | 
0.19.69 | 
0.19.70 | 
0.19.71 | 
0.19.72 | 
0.19.73 | 
0.19.74 | 
0.19.75 | 
0.19.76 | 
0.19.77 | 
0.19.78 | 
| 
non-inverted
 | 
[15] | 
[14] | 
[13] | 
[12] | 
[11] | 
[10] | 
[9] | 
[8] | 
[7] | 
[6] | 
[5] | 
[4] | 
[3] | 
[2] | 
[1] | 
[0] | 
 
| SLICE0:FFX_INIT | 
0.20.6 | 
| SLICE0:FFX_SRVAL | 
0.20.0 | 
| SLICE0:FFY_INIT | 
0.20.34 | 
| SLICE0:FFY_SRVAL | 
0.20.30 | 
| SLICE0:FF_SR_ENABLE | 
0.20.38 | 
| SLICE0:INV.BX | 
0.18.19 | 
| SLICE0:INV.BY | 
0.18.22 | 
| SLICE1:FFX_INIT | 
0.20.5 | 
| SLICE1:FFX_SRVAL | 
0.20.1 | 
| SLICE1:FFY_INIT | 
0.20.33 | 
| SLICE1:FFY_SRVAL | 
0.20.29 | 
| SLICE1:INV.BX | 
0.18.61 | 
| SLICE1:INV.BY | 
0.18.58 | 
| SLICE2:FFX_INIT | 
0.20.46 | 
| SLICE2:FFX_SRVAL | 
0.20.42 | 
| SLICE2:FFY_INIT | 
0.20.74 | 
| SLICE2:FFY_SRVAL | 
0.20.70 | 
| SLICE2:FF_SR_ENABLE | 
0.20.79 | 
| SLICE2:INV.BX | 
0.18.18 | 
| SLICE2:INV.BY | 
0.18.21 | 
| SLICE3:FFX_INIT | 
0.20.45 | 
| SLICE3:FFX_SRVAL | 
0.20.41 | 
| SLICE3:FFY_INIT | 
0.20.73 | 
| SLICE3:FFY_SRVAL | 
0.20.69 | 
| SLICE3:INV.BX | 
0.18.60 | 
| SLICE3:INV.BY | 
0.18.57 | 
| 
inverted
 | 
~[0] | 
 
| SLICE0:FF_LATCH | 
0.20.10 | 
| SLICE0:FF_REV_ENABLE | 
0.20.27 | 
| SLICE0:FF_SR_SYNC | 
0.20.26 | 
| SLICE0:F_RAM | 
0.20.8 | 
| SLICE0:F_SHIFT | 
0.20.37 | 
| SLICE0:F_SLICEWE0USED | 
0.20.9 | 
| SLICE0:F_SLICEWE1USED | 
0.20.11 | 
| SLICE0:G_RAM | 
0.20.7 | 
| SLICE0:G_SHIFT | 
0.20.36 | 
| SLICE0:G_SLICEWE0USED | 
0.21.20 | 
| SLICE0:G_SLICEWE1USED | 
0.21.19 | 
| SLICE1:FF_LATCH | 
0.20.22 | 
| SLICE1:FF_REV_ENABLE | 
0.20.28 | 
| SLICE1:FF_SR_SYNC | 
0.20.25 | 
| SLICE2:FF_LATCH | 
0.20.50 | 
| SLICE2:FF_REV_ENABLE | 
0.20.67 | 
| SLICE2:FF_SR_SYNC | 
0.20.66 | 
| SLICE2:F_RAM | 
0.20.48 | 
| SLICE2:F_SHIFT | 
0.20.78 | 
| SLICE2:F_SLICEWE0USED | 
0.20.49 | 
| SLICE2:F_SLICEWE1USED | 
0.20.47 | 
| SLICE2:G_RAM | 
0.20.40 | 
| SLICE2:G_SHIFT | 
0.20.77 | 
| SLICE2:G_SLICEWE0USED | 
0.21.60 | 
| SLICE2:G_SLICEWE1USED | 
0.21.59 | 
| SLICE3:FF_LATCH | 
0.20.62 | 
| SLICE3:FF_REV_ENABLE | 
0.20.68 | 
| SLICE3:FF_SR_SYNC | 
0.20.65 | 
| 
non-inverted
 | 
[0] | 
 
| SLICE0:FXMUX | 
0.20.14 | 
| SLICE1:FXMUX | 
0.20.13 | 
| SLICE2:FXMUX | 
0.20.54 | 
| SLICE3:FXMUX | 
0.20.53 | 
| F5 | 
0 | 
| FXOR | 
1 | 
 
| SLICE0:GYMUX | 
0.20.19 | 
| SLICE1:GYMUX | 
0.19.20 | 
| SLICE2:GYMUX | 
0.20.59 | 
| SLICE3:GYMUX | 
0.19.60 | 
| FX | 
0 | 
| GXOR | 
1 | 
 
| SLICE0:XBMUX | 
0.21.18 | 
| SLICE2:XBMUX | 
0.21.58 | 
| FCY | 
0 | 
| FMC15 | 
1 | 
 
| SLICE0:YBMUX | 
0.21.21 | 
| SLICE2:YBMUX | 
0.21.61 | 
| GCY | 
0 | 
| GMC15 | 
1 |