ep1s25 Altera Corporation, ep1s25 Datasheet - Page 71

• Manufacturer Part Number: ep1s25
• Description: Stratix Device Family Data Sheet
• Manufacturer: Altera Corporation

Figure 2–32. Multiplier Sub-Block within Stratix DSP Block
Note to
(1)
Altera Corporation
July 2005
These signals can be unregistered or registered once to match data path pipelines if required.
Figure
Data B
Data A
2–32:
shiftout B
shiftin B
shiftout A
The DSP block consists of the following elements:
■
■
Multiplier Block
The DSP block multiplier block consists of the input registers, a
multiplier, and pipeline register for pipelining multiply-accumulate and
multiply-add/subtract functions as shown in
ENA
ENA
D
D
Multiplier block
Adder/output block
CLRN
CLRN
clock[3..0]
sign_a (1)
sign_b (1)
shiftin A
aclr[3..0]
ena[3..0]
Q
Q
ENA
D
CLRN
Q
Stratix Device Handbook, Volume 1
Figure
Optional
Multiply-Accumulate
and Multiply-Add
Pipeline
Result
to Adder
blocks
2–32.
Stratix Architecture
2–57