DK-DEV-5SGXEA7/ES Altera, DK-DEV-5SGXEA7/ES Datasheet - Page 132

• 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

3–16
Figure 3–13. 27 × 27 Complex Multiplier with Four Variable Precision Blocks
Stratix V Device Handbook Volume 2: Device Interfaces and Integration
27 x 27 Complex Multiplier
Stratix V devices support an individual 27 x 27 complex multiplication mode. You
require four variable precision DSP blocks to implement an individual 27 x 27
complex multiplication mode. You can implement the imaginary part
[(a × d) + (b × c)] in the first and second variable precision DSP blocks, and you can
implement the real part [(a × c) - (b × d)] in the third and fourth variable precision
DSP blocks. You can achieve the difference of two 27 × 27 multiplications by enabling
the NEGATE control signal in the fourth variable precision DSP block.
Figure 3–13
blocks.
d[26..0]
a[26..0]
c[26..0]
b[26..0]
c[26..0]
a[26..0]
d[26..0]
b[26..0]
27
27
27
27
27
27
27
27
Variable Precision DSP Block 1
shows a 27-bit complex multiplication with four variable precision DSP
Variable Precision DSP Block 2
Variable Precision DSP Block 4
Variable Precision DSP Block 3
Multiplier
Multiplier
Multiplier
Multiplier
x
x
x
x
Chainout
Chainout
Adder
Adder
+
Chapter 3: Variable Precision DSP Blocks in Stratix V Devices
+
55
55
[(a × c) - (b × d)]
[(a × d) + (b × c)]
Operational Mode Descriptions
May 2011 Altera Corporation