DK-DEV-4SGX230N Altera, DK-DEV-4SGX230N Datasheet - Page 106

• Manufacturer Part Number: DK-DEV-4SGX230N
• Description: KIT DEVELOPMENT STRATIX IV
• Manufacturer: Altera
• Series: Stratix® IVr
• Type: FPGAr

Specifications of DK-DEV-4SGX230N

• Contents: Development Board, Universal Power Supply, Cables and Software
• Silicon Manufacturer: Altera
• Core Architecture: FPGA
• Core Sub-architecture: Stratix
• Silicon Core Number: EP4S
• Silicon Family Name: Stratix IV GX
• Rohs Compliant: Yes
• For Use With/related Products: EP4SGX230K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 544-2594

4–26
Figure 4–17. Four-Multiplier Adder Mode Shown for a Half DSP Block
Note to
(1) Block output for accumulator overflow and saturate overflow.
Stratix IV Device Handbook Volume 1
Figure
Four-Multiplier Adder
dataa_0[ ]
datab_0[ ]
dataa_1[ ]
datab_1[ ]
datab_2[ ]
dataa_3[ ]
datab_3[ ]
dataa_2[ ]
4–17:
In the four-multiplier adder configuration shown in
implement two four-multiplier adders (one four-multiplier adder per half DSP block).
These modes are useful for implementing one-dimensional and two-dimensional
filtering applications. The four-multiplier adder is performed in two addition stages.
The outputs of two of the four multipliers are initially summed in the two first-stage
adder blocks. The results of these two adder blocks are then summed in the
second-stage adder block to produce the final four-multiplier adder result, as shown
by
Equation 4–2 on page 4–5
Half-DSP Block
clock[3..0]
ena[3..0]
aclr[3..0]
+
+
output_saturate
output_round
and
signa
signb
Equation 4–3 on page
+
Figure
Chapter 4: DSP Blocks in Stratix IV Devices
4–5.
Stratix IV Operational Mode Descriptions
4–17, the DSP block can
overflow (1)
February 2011 Altera Corporation
result[ ]