EP3SL150F780I3N Altera, EP3SL150F780I3N Datasheet - Page 123

• Manufacturer Part Number: EP3SL150F780I3N
• Description: Stratix III
• Manufacturer: Altera

Figure 5–11. 36-Bit Independent Multiplier Mode Shown for Half-DSP Block
Altera Corporation
October 2007
dataa_0[35..18]
datab_0[35..18]
datab_0[35..18]
dataa_0[35..18]
dataa_0[17..0]
datab_0[17..0]
dataa_0[17..0]
datab_0[17..0]
clock[3..0]
ena[3..0]
aclr[3..0]
Half-DSP Block
Double Multiplier
The Stratix III DSP block can be configured to efficiently support an
unsigned 54 × 54 bit multiplier that is required to compute the mantissa
portion of an IEEE double precision floating point multiplication. A
54 × 54 bit multiplier can be built using basic 18 × 18 multipliers, shifters
and adders. In order to efficiently utilize the Stratix III DSP block's built
signa
signb
+
+
+
Stratix III Device Handbook, Volume 1
DSP Blocks in Stratix III Devices
72
result[ ]
5–23