4–2
Chapter 4: Embedded Multipliers in the Cyclone III Device Family
Embedded Multiplier Block Overview
Embedded Multiplier Block Overview
shows one of the embedded multiplier columns with the surrounding logic
array blocks (LABs). The embedded multiplier is configured as either one 18 × 18
multiplier or two 9 × 9 multipliers. For multiplications greater than 18 × 18, the
Quartus
®
II software cascades multiple embedded multiplier blocks together. There
are no restrictions on the data width of the multiplier, but the greater the data width,
the slower the multiplication process.
Figure 4–1. Embedded Multipliers Arranged in Columns with Adjacent LABs
Embedded
Multiplier
Column
1 LAB
Row
Embedded
Multiplier
lists the number of embedded multipliers and the multiplier modes that can
be implemented in the Cyclone III device family.
Table 4–1. Number of Embedded Multipliers in the Cyclone III Device Family
Device Family
Device
EP3C5
EP3C10
EP3C16
Cyclone III
EP3C25
EP3C40
EP3C55
EP3C80
EP3C120
EP3CLS70
Cyclone III LS
EP3CLS100
EP3CLS150
EP3CLS200
Note to
(1) These columns show the number of 9 × 9 or 18 × 18 multipliers for each device. The total number of multipliers for each device is not the sum
of all the multipliers.
Embedded Multipliers
23
23
56
66
126
156
244
288
200
276
320
396
9
×
9 Multipliers
46
46
112
132
252
312
488
576
400
552
640
792
18
×
18 Multipliers
23
23
56
66
126
156
244
288
200
276
320
396
Cyclone III Device Handbook
Volume 1
December 2011 Altera Corporation
ALTERA [ ALTERA CORPORATION ]
