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DIFFCLK_1N Cyclone III Device Handbook
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Part No.:   DIFFCLK_1N
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Description:   Cyclone III Device Handbook
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Page : 274 Pages
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Chapter 1: Cyclone III Device Family Overview
Cyclone III Device Family Architecture
1–7
Memory Blocks
Each M9K memory block of the Cyclone III device family provides nine Kbits of
on-chip memory capable of operating at up to 315 MHz for Cyclone III devices and up
to 274 MHz for Cyclone III LS devices. The embedded memory structure consists of
M9K memory blocks columns that you can configure as RAM, first-in first-out (FIFO)
buffers, or ROM. The Cyclone III device family memory blocks are optimized for
applications such as high throughout packet processing, embedded processor
program, and embedded data storage.
The Quartus II software allows you to take advantage of the M9K memory blocks by
instantiating memory using a dedicated megafunction wizard or by inferring memory
directly from the VHDL or Verilog source code.
M9K memory blocks support single-port, simple dual-port, and true dual-port
operation modes. Single-port mode and simple dual-port mode are supported for all
port widths with a configuration of ×1, ×2, ×4, ×8, ×9, ×16, ×18, ×32, and ×36. True
dual-port is supported in port widths with a configuration of ×1, ×2, ×4, ×8, ×9, ×16,
and ×18.
f
For more information about memory blocks, refer to the
chapter.
Embedded Multipliers and Digital Signal Processing Support
Cyclone III devices support up to 288 embedded multiplier blocks and Cyclone III LS
devices support up to 396 embedded multiplier blocks. Each block supports one
individual 18 × 18-bit multiplier or two individual 9 × 9-bit multipliers.
The Quartus II software includes megafunctions that are used to control the operation
mode of the embedded multiplier blocks based on user parameter settings.
Multipliers can also be inferred directly from the VHDL or Verilog source code. In
addition to embedded multipliers, Cyclone III device family includes a combination
of on-chip resources and external interfaces, making them ideal for increasing
performance, reducing system cost, and lowering the power consumption of digital
signal processing (DSP) systems. You can use Cyclone III device family alone or as
DSP device co-processors to improve price-to-performance ratios of DSP systems.
The Cyclone III device family DSP system design support includes the following
features:
DSP IP cores:
Common DSP processing functions such as finite impulse response (FIR), fast
Fourier transform (FFT), and numerically controlled oscillator (NCO) functions
Suites of common video and image processing functions
Complete reference designs for end-market applications
DSP Builder interface tool between the Quartus II software and the MathWorks
Simulink and MATLAB design environments
DSP development kits
f
For more information about embedded multipliers and digital signal processing
support, refer to the
chapter.
July 2012
Altera Corporation
Cyclone III Device Handbook
Volume 1
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