IP Bus Controller, Fpga Logic Block Diagram

MP3 NG: A Next Generation Consumer Platform

CPU Address/Data

CPU Control

USB Control

Tranceiver Interface

Signals

	LCD Controller
	D_IN[31:0]	LCD Control
	A_OUT[31:2]	LCD Control
	A_OUT[31:2]	Signals
	Control Out	Signals
	Control Out
MUX
	DAC Interface
	D_OUT[31:0]
	D_IN[31:0]	DAC Interface
	A_IN[3:2]	Signals
MUX	Control In
CPU Interface
D_OUT[31:0]	Touch Screen
D_IN[31:0]	Interface
A_OUT[31:2]	D_OUT[31:0]
Control Out	D_IN[31:0]	ADC Interface
	A_IN[3:2]	Signals
	Control In
IRDA Controller	Memory Interface
D_OUT[31:0]	D_OUT[31:0]
D_IN[31:0]	D_IN[31:0]	Memory Data
A_IN[3:2]	A_IN[19:0]	Memory Data
A_IN[3:2]	A_IN[19:0]	Memory Address
Control In	Control In	Memory Address
Control In	Control In
	SDRAM Controller
	Control In	SDRAM Control
	Control In	Signals
		Signals
MUX	FLASH Controller
	FLASH Controller
	Control In	FLASH Control
	Control In	Signals
		Signals
	CompactFlash
	Controller	CompactFlash
	Control In	CompactFlash
	Control In	Control
		Signals

Figure 15: FPGA Logic Block Diagram

While most of the blocks are fairly independent, the FLASH, SDRAM, and CompactFlash interfaces share common address and data busses. While this results in a fairly complex muxing scheme for these datapaths it is necessary to keep the pin count within an acceptable range.

The following sections will discuss the implementation of each of these functional blocks and outline the hardware and software resources needed to support each.

IP Bus Controller

The IP Bus Controller block performs two functions: block address decoding and IP bus arbitration.

The address decode block generates device selects for the IP block that is the target of the transfer. It also controls the multiplexers that select the response signals from the target of the transfer (ACK, DOUT, etc.).

IP bus arbitration between access requests from the CPU Interface and the LCD Controller are handled by using a simple rotating priority scheme. The arbiter block also controls the multiplexers that select which set of transfer control signals (RD, WR, etc.) control the transfer.

The FPGA device resources used to implement this block include an estimated 32 CLBs but no I/O pads. There is no software required to support this block.

XAPP169 (v1.0) November 24, 1999	www.xilinx.com	15
	1-800-255-7778

XAPP169 specifications

Xilinx XAPP169 is a pioneering application note that delves into the design and implementation of high-performance digital signal processing (DSP) systems. It serves as a reference guide for engineers and designers looking to leverage Xilinx Field Programmable Gate Arrays (FPGAs) for sophisticated DSP applications. The document provides a comprehensive overview of the techniques and methodologies necessary to harness the power and flexibility of FPGA technology in DSP design.

One of the main features of XAPP169 is its focus on the integration of various DSP functions, including filtering, modulation, and Fourier transforms. By utilizing the inherent parallelism of FPGAs, designers can achieve significant performance enhancements compared to traditional DSP implementations. This parallel processing capability allows for real-time processing of high-bandwidth signals, making XAPP169 ideal for applications such as telecommunications, aerospace, and medical imaging.

The application note emphasizes the use of Xilinx’s advanced tools and libraries, such as the Xilinx System Generator for DSP and the Xilinx Vivado Design Suite. These tools facilitate the modeling, simulation, and synthesis of DSP algorithms tailored to specific requirements, enabling a rapid development cycle. By providing pre-optimized building blocks and IP cores, XAPP169 streamlines the design process, reducing time-to-market for new products and innovations.

Additionally, XAPP169 highlights the ability to leverage high-speed serial transceivers present in Xilinx FPGAs. These transceivers enable reliable transmission of data across long distances with minimized latency and optimized bandwidth utilization. The application note outlines various techniques for managing signal integrity and maximizing throughput, ensuring that designs can meet the stringent requirements of modern DSP applications.

Another characteristic of XAPP169 is its attention to resource utilization and optimization strategies. The document discusses how to balance performance with area and power consumption, which is crucial in embedded applications where space and power are at a premium. By employing advanced synthesis strategies and leveraging the capabilities of Xilinx’s architecture, designers can create efficient and scalable DSP systems.

In summary, Xilinx XAPP169 serves as an invaluable resource for engineers seeking to harness the capabilities of FPGAs in DSP applications. With its focus on high-performance design, integration of advanced tools, and optimization strategies, it opens up new possibilities for innovation in various fields where digital signal processing is essential.