Digital Signal Processing Block
Figure 2–41. DSP Block Interface to Interconnect
C4 and C8
Interconnects
Direct Link Interconnect
from Adjacent LAB
Nine Direct Link Outputs Direct Link Interconnect
to Adjacent LABs
from Adjacent LAB
R4 and R8 Interconnects
18
DSP Block
Row Structure
LAB
LAB
10
9
9
10
3
Control
[17..0]
18
18
[17..0]
Row Interface
Block
DSP Block to
18 Inputs per Row
18 Outputs per Row
LAB Row Interface
Block Interconnect Region
A bus of 18 control signals feeds the entire DSP block. These signals
include clock[0..3]clocks, aclr[0..3]asynchronous clears,
ena[1..4]clock enables, signa, signbsigned/unsigned control
signals, addnsub1and addnsub3addition and subtraction control
signals, and accum_sload[0..1]accumulator synchronous loads. The
2–72
Stratix Device Handbook, Volume 1
Altera Corporation
July 2005
ALTERA [ ALTERA CORPORATION ]
