ep1sgx25d Altera Corporation, ep1sgx25d Datasheet - Page 123

• Manufacturer Part Number: ep1sgx25d
• Description: Stratix Gx Device Family Data Sheet
• Manufacturer: Altera Corporation

Figure 4–33. Adder/Output Blocks
Notes to
(1)
(2)
Altera Corporation
February 2005
accum_sload0 (2)
accum_sload1 (2)
Adder/output block shown in
blocks and two summation blocks.
These signals are either not registered, registered once, or registered twice to match the data path pipeline.
addnsub1 (2)
addnsub3 (2)
Figure
signa (2)
signb (2)
Result C
Result D
Result A
Result B
4–33:
Accumulator1
Figure 4–33
Accumulator2
Subtractor/
Subtractor/
Adder/
Adder/
Note (1)
is in 18 × 18-bit mode. In 9 × 9-bit mode, there are four adder/subtractor
Summation
Accumulator Feedback
Accumulator Feedback
Stratix GX Device Handbook, Volume 1
Stratix GX Architecture
overflow0
overflow1
Output Selection
Multiplexer
Output
Register Block
4–57