DK-DEV-5SGXEA7/ES Altera, DK-DEV-5SGXEA7/ES Datasheet - Page 129

• 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

Chapter 3: Variable Precision DSP Blocks in Stratix V Devices
Operational Mode Descriptions
Figure 3–9. One 36 × 18 Independent Multiplier Mode for Stratix V Devices
Figure 3–10. 36-Bit Independent Multiplier Mode with Two Variable Precision DSP Blocks for Stratix V Devices
May 2011 Altera Corporation
dataa_0[35..18]
datab_0[17..0]
dataa_0[17..0]
datab_0[17..0]
36-Bit Multiplier
You can efficiently construct an individual 36-bit multiplier with two adjacent
Stratix V variable precision DSP blocks. The 36 x 36 multiplication consists of four
18 x 18 multipliers, as shown in
applications requiring more than 18-bit precision; for example, for the mantissa
multiplication portion of very high precision fixed-point arithmetic applications.
dataa_0[35..18]
datab_0[35..18]
datab_0[35..18]
dataa_0[35..18]
dataa_0[17..0]
datab_0[17..0]
dataa_0[17..0]
datab_0[17..0]
18
18
18
18
Variable Precision DSP Block
18
18
18
18
18
18
18
18
Variable Precision DSP Block 1
Variable Precision DSP Block 2
Mult_H
Mult_L
x
x
Mult_H
Mult_L
Mult_H
Mult_L
x
x
x
x
x
+/-
Figure
Stratix V Device Handbook Volume 2: Device Interfaces and Integration
Adder
Adder
+
+
3–10. The 36-bit multiplier is useful for
18
54
result[17..0]
result[71..18]
54
result[53..0]
3–13