ep2sgx30c Altera Corporation, ep2sgx30c Datasheet - Page 94

• Manufacturer Part Number: ep2sgx30c
• Description: Stratix Ii Gx Device Data Sheet
• Manufacturer: Altera Corporation

Digital Signal Processing (DSP) Block
Figure 2–59. DSP Block Interconnect Interface
2–86
Stratix II GX Device Handbook, Volume 1
Link Interconnects
R4, C4 & Direct
The DSP block is divided into four block units that interface with four
LAB rows on the left and right. Each block unit can be considered one
complete 18 × 18-bit multiplier with 36 inputs and 36 outputs. A local
interconnect region is associated with each DSP block. Like a LAB, this
interconnect region can be fed with 16 direct link interconnects from the
LAB to the left or right of the DSP block in the same row. R4 and C4
routing resources can access the DSP block’s local interconnect region.
The outputs also work similarly to LAB outputs. Eighteen outputs from
the DSP block can drive to the left LAB through direct link interconnects
and 18 can drive to the right LAB through direct link interconnects. All 36
outputs can drive to R4 and C4 routing interconnects. Outputs can drive
right- or left-column routing.
Figures 2–59
and
2–60
A2[17..0]
B2[17..0]
A3[17..0]
B3[17..0]
A4[17..0]
B4[17..0]
A1[17..0]
B1[17..0]
DSP Block
OG[17..0]
OC[17..0]
OD[17..0]
OH[17..0]
OA[17..0]
OB[17..0]
OE[17..0]
OF[17..0]
show the DSP block interfaces to LAB rows.
R4, C4 & Direct
Link Interconnects
Altera Corporation
October 2007