DK-DEV-4SGX230N Altera, DK-DEV-4SGX230N Datasheet - Page 71

• Manufacturer Part Number: DK-DEV-4SGX230N
• Description: KIT DEVELOPMENT STRATIX IV
• Manufacturer: Altera
• Series: Stratix® IVr
• Type: FPGAr

Specifications of DK-DEV-4SGX230N

• Contents: Development Board, Universal Power Supply, Cables and Software
• Silicon Manufacturer: Altera
• Core Architecture: FPGA
• Core Sub-architecture: Stratix
• Silicon Core Number: EP4S
• Silicon Family Name: Stratix IV GX
• Rohs Compliant: Yes
• For Use With/related Products: EP4SGX230K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 544-2594

Chapter 3: TriMatrix Embedded Memory Blocks in Stratix IV Devices
Memory Modes
Figure 3–14. Shift-Register Memory Configuration
February 2011 Altera Corporation
Shift-Register Mode
w x m x n Shift Register
W
W
W
W
All Stratix IV memory blocks support shift register mode. Embedded memory block
configurations can implement shift registers for digital signal processing (DSP)
applications, such as finite impulse response (FIR) filters, pseudo-random number
generators, multi-channel filtering, and auto- and cross-correlation functions. These
and other DSP applications require local data storage, traditionally implemented with
standard flipflops that quickly exhaust many logic cells for large shift registers. A
more efficient alternative is to use embedded memory as a shift-register block, which
saves logic cell and routing resources.
The size of a shift register (w × m × n) is determined by the input data width (w), the
length of the taps (m), and the number of taps (n). You can cascade memory blocks to
implement larger shift registers.
Figure 3–14
m-Bit Shift Register
m-Bit Shift Register
m-Bit Shift Register
m-Bit Shift Register
shows the TriMatrix memory block in shift-register mode.
W
W
W
W
Stratix IV Device Handbook Volume 1
n Number of Taps
3–15