EP2AGX45DF29I5 Altera, EP2AGX45DF29I5 Datasheet - Page 90

• Manufacturer Part Number: EP2AGX45DF29I5
• Description: IC ARRIA II GX FPGA 45K 780FBGA
• Manufacturer: Altera
• Series: Arria II GXr

Specifications of EP2AGX45DF29I5

• Number Of Logic Elements/cells: 42959
• Number Of Labs/clbs: 1805
• Total Ram Bits: 3435
• Number Of I /o: 364
• Voltage - Supply: 0.87 V ~ 0.93 V
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 100°C
• Package / Case: 780-FBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Number Of Gates: -

4–18
Arria II Device Handbook Volume 1: Device Interfaces and Integration
Double Multiplier
You can configure the Arria II DSP block to support an unsigned 54 × 54-bit multiplier
that is required to compute the mantissa portion of an IEEE double precision floating
point multiplication. You can build a 54 × 54-bit multiplier with basic 18 × 18
multipliers, shifters, and adders. To efficiently use built-in shifters and adders in the
Arria II DSP block, a special double mode (partial 54 × 54 multiplier) is available that
is a slight modification to the basic 36 × 36 multiplier mode, as shown in
and
Figure 4–11. Double Mode Shown for a Half DSP Block
dataa_0[35..18]
datab_0[35..18]
datab_0[35..18]
dataa_0[35..18]
datab_0[17..0]
dataa_0[17..0]
dataa_0[17..0]
datab_0[17..0]
Figure
clock[3..0]
ena[3..0]
aclr[3..0]
4–12.
Half-DSP Block
signa
signb
+
+
+
Chapter 4: DSP Blocks in Arria II Devices
Arria II Operational Mode Descriptions
December 2010 Altera Corporation
72
Figure 4–11
result[ ]