DK-DEV-5SGXEA7/ES Altera, DK-DEV-5SGXEA7/ES Datasheet - Page 136

• Manufacturer Part Number: DK-DEV-5SGXEA7/ES
• Description: KIT DEV STRATIX V FPGA 5SGXEA7
• Manufacturer: Altera
• Series: Stratix® Vr
• Type: FPGAr

Specifications of DK-DEV-5SGXEA7/ES

• Contents: Board
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: Stratix® V 5SGXEA7
• Other names: 544-2725

3–20
Figure 3–18. One Sum of Square Mode in a Variable Precision DSP Block for Stratix V Devices
Figure 3–19. One 18 × 18 Multiplication Summed with 36-Bit Input Mode for Stratix V Devices
Stratix V Device Handbook Volume 2: Device Interfaces and Integration
SUB_COMPLEX
dataa_0[17..0]
data_1[35..18]
datab_0[17..0]
data_1[17..0]
Sum of Square Mode
18 x 18 Multiplication Summed with 36-Bit Input Mode
18
18
18
18
Variable Precision DSP Block
The Stratix V variable precision DSP block can implement one sum of square mode,
(a ± b)
convert b and d input as two’s complement numbers to perform subtraction, if
required. You can feed each 18-bit pre-adder block output into both multiplicand and
multiplier inputs of an 18 x 18 multiplier to generate a square result.
Figure 3–18
Stratix V variable precision DSP blocks support one 18 x 18 multiplication summed to
a 36-bit input. You can use Mult_L to provide the input for an 18 x 18 multiplication,
whereas Mult_H is bypassed. The data1[17..0] and data1[35..18] signals are
concatenated to produce a 36-bit input.
summed with the 36-bit input mode in a variable precision DSP block.
SUB_COMPLEX
d[17..0]
c[17..0]
b[17..0]
a[17..0]
2
× (c ± d)
shows the sum of square mode in a variable precision DSP block.
18
18
18
18
Variable Precision DSP Block
2
. You can feed the four 18-bit inputs into the pre-adder block to
Mult_L
x
Pre-Adder
Pre-Adder
+/-
+/-
Multiplier
Multiplier
x
x
Adder
+/-
Chapter 3: Variable Precision DSP Blocks in Stratix V Devices
Figure 3–19
+/-
Adder
37
shows the 18 x 18 multiplication
result[36..0]
Operational Mode Descriptions
May 2011 Altera Corporation
37
Result[36..0]