EP3C16F256I7N Altera, EP3C16F256I7N Datasheet - Page 97

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

Figure 5–4. 9-Bit Multiplier Mode
Altera Corporation-Preliminary
March 2007
Data A 0 [8..0]
Data B 0 [8..0]
Data A 1 [8..0]
Data B 1 [8..0]
All 9-bit multiplier inputs and results can be sent independently 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 of the data A inputs feeding the same embedded
multiplier must have the same sign representation. Similarly, all of the
data B inputs feeding the same embedded multiplier must have the
same sign representation.
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]
Operational Modes
5–9