9-Bit Multipliers - Altera Cyclone IV Device Handbook

4–6

9-Bit Multipliers

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.
Figure 4–4. 9-Bit Multiplier Mode
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 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.
Cyclone IV Device Handbook,
Volume 1
shows the embedded multiplier configured to support two 9-bit
signa
signb
aclr
clock
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Chapter 4: Embedded Multipliers in Cyclone IV Devices
Data Out 0 [17..0]
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9 × 9 Multiplier
Data Out 1 [17..0]
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9 × 9 Multiplier
Embedded Multiplier
February 2010 Altera Corporation
Operational Modes