EP3C16F256I7N Altera, EP3C16F256I7N Datasheet - Page 63

• Manufacturer Part Number: EP3C16F256I7N
• Description: Cyclone III
• Manufacturer: Altera

Chapter 4: Embedded Multipliers in the Cyclone III Device Family
Operational Modes
9-Bit Multipliers
Figure 4–4. 9-Bit Multiplier Mode
© December 2009
Data A 0 [8..0]
Data A 1 [8..0]
Data B 0 [8..0]
Data B 1 [8..0]
Altera Corporation
You can configure each embedded multiplier to support two 9 × 9 independent
multipliers for input widths of up to 9 bits.
Figure 4–4
multipliers.
All 9-bit multiplier inputs and results are independently sent through registers. The
multiplier inputs can accept signed integers, unsigned integers, or a combination of
both. Two 9 × 9 multipliers in the same embedded multiplier block share the same
signa and signb signal. Therefore, all the Data A inputs feeding the same
embedded multiplier must have the same sign representation. Similarly, all the
Data B inputs feeding the same embedded multiplier must have the same sign
representation.
shows the embedded multiplier configured to support two 9-bit
ENA
ENA
ENA
ENA
D
D
D
D
CLRN
CLRN
CLRN
CLRN
signa
signb
clock
Q
Q
Q
Q
ena
aclr
Embedded Multiplier
ENA
ENA
D
D
9 × 9 Multiplier
9 × 9 Multiplier
CLRN
CLRN
Q
Q
Cyclone III Device Handbook, Volume 1
Data Out 0 [17..0]
Data Out 1 [17..0]
4–7