EP4SE360F35I4 Datasheet, PDF (96/432 Pages) Altera Corporation – This section provides a complete overview of all features relating to the Stratix IV device family, which is the most architecturlly advanced

4–16
Chapter 4: DSP Blocks in Stratix IV Devices
Stratix IV Operational Mode Descriptions
Figure 4–8. 18-Bit Independent Multiplier Mode Shown for a Half DSP Block
clock[3..0]
ena[3..0]
aclr[3..0]
signa
signb
output_round
output_saturate
overflow (1)
18
dataa_0[17..0]
18
datab_0[17..0]
18
dataa_1[17..0]
18
datab_1[17..0]
Half-DSP Block
Note to Figure 4–8:
(1) Block output for accumulator overflow and saturate overflow.
36
result_0[ ]
36
result_1[ ]
Stratix IV Device Handbook
Volume 1
February 2011 Altera Corporation