EP2AGX45DF29I5 Altera, EP2AGX45DF29I5 Datasheet - Page 77

• 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: -

Chapter 4: DSP Blocks in Arria II Devices
Simplified DSP Operation
Figure 4–3. Four-Multiplier Adder and Accumulation Capability
December 2010 Altera Corporation
Input
Data
144
Half-DSP Block
Equation 4–3. Four-Multiplier Adder Equation (44-Bit Accumulation)
In these equations, n denotes sample time and P[36..0] are the results from the
two-multiplier adder units.
Equation 4–2
(four-multiplier adder), and
operation, but with a maximum of a 44-bit accumulation capability by feeding the
output from the output register bank back to the adder/accumulator block, as shown
in
You can bypass all register stages depending on which mode you select, except
accumulation and loopback mode. In these two modes, you must enable at least one
set of the registers. If the register is not enabled, an infinite loop occurs.
To support FIR-like structures efficiently, a major addition to the DSP block in Arria II
devices is the ability to propagate the result of one half block to the next half block
completely in the DSP block without additional soft logic overhead. This is achieved
by the inclusion of a dedicated addition unit and routing that adds the 44-bit result of
a previous half block with the 44-bit result of the current block. The 44-bit result is
either fed to the next half block or out of the DSP block with the output register stage
shown in
Figure
W
4–3.
Figure
n
[43..0] = W
provides a sum of four 18 × 18-bit multiplication operations
4–4. Detailed examples are described in later sections.
n-1
[43..0] ± Z
Equation 4–3
n
[37..0]
Arria II Device Handbook Volume 1: Device Interfaces and Integration
provides a four 18 × 18-bit multiplication
44
Result[]
4–5