EP3C10U256C6N Datasheet, PDF (54/274 Pages) Altera Corporation – Cyclone III Device Family Overview

4–2
Chapter 4: Embedded Multipliers in the Cyclone III Device Family
Embedded Multiplier Block Overview
Embedded Multiplier Block Overview
Figure 4–1 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
Table 4–1 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
Embedded Multipliers 9 × 9 Multipliers ⁽¹⁾ 18 × 18 Multipliers ⁽¹⁾
EP3C5
23
46
23
EP3C10
23
46
23
EP3C16
56
112
56
EP3C25
66
132
66
Cyclone III
EP3C40
126
252
126
EP3C55
156
312
156
EP3C80
244
488
244
EP3C120
288
576
288
EP3CLS70
200
400
200
EP3CLS100
276
552
276
Cyclone III LS
EP3CLS150
320
640
320
EP3CLS200
396
792
396
Note to Table 4–1:
(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.
Cyclone III Device Handbook
Volume 1
December 2011 Altera Corporation