EP4SE360F35I4 Datasheet, PDF (101/432 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

Chapter 4: DSP Blocks in Stratix IV Devices
Stratix IV Operational Mode Descriptions
4–21
Figure 4–13. Unsigned 54 × 54 Multiplier for a Half-DSP Block
clock[3..0]
ena[3..0]
aclr[3..0]
signa
signb
"0"
"0"
dataa[53..36]
datab[53..36]
dataa[35..18]
datab[53..36]
dataa[17..0]
datab[53..36]
dataa[53..36]
datab[35..18]
dataa[53..36]
datab[17..0]
dataa[35..18]
datab[35..18]
dataa[17..0]
datab[35..18]
dataa[35..18]
datab[17..0]
dataa[17..0]
datab[17..0]
Two Multiplier
Adder Mode
36
+
Double Mode
55
108
result[ ]
36 x 36 Mode
72
Unsigned 54 X 54 Multiplier
February 2011 Altera Corporation
Stratix IV Device Handbook
Volume 1