XC18V256SO20C

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FPGAs (Field Programmable Gate Arrays) are extremely flexible components that are used in a wide variety of applications, including digital signal processing, communications, embedded systems, and industrial controls. Configuring FPGAs requires the configuration data to be stored externally. Configuration PROMs, such as XC18V256SO20C, are used to provide the required data and ensure the FPGA is correctly configured. In this article, we will discuss the application field and working principle of XC18V256SO20C.

Application Field

XC18V256SO20C is a configuration PROM device designed for FPGA applications. It is a non-volatile memory device, which means the stored data will not be lost when power is removed from the device. It provides a secure way of programming, protection from tampering, and data security. The XC18V256SO20C has a total memory capacity of 256Kbits, with a memory organization of 1K x 16. It can be used for general-purpose FPGA configuration, as well as for partial field-upgrading of FPGA memories. The XC18V256SO20C is fully compliant with IEEE Standard 1532-2002.

The XC18V256SO20C is suitable for use in a wide range of applications, including medical, industrial and instrumentation, automotive, communication and consumer, aerospace and defense, security, multimedia, and gaming. It is suitable for any application where high-speed and secure configuration is needed.

Working Principle

The XC18V256SO20C is an FPGA configuration PROM, which provides a convenient way for configuring FPGAs. It works by storing the desired configuration data in its on-chip memory. When the FPGA is powered up, the configuration data from the XC18V256SO20C is read by the FPGA and used to configure itself according to the desired parameters. The configuration data can be programmed into the XC18V256SO20C either in-circuit or via off-chip programming.

The XC18V256SO20C uses a three-phase programming technique, which ensures the correct and consistent loading of data into the FPGA. The three phases are IDLE, SELECT, and WRITE cycles. The IDLE phase holds the FPGA in its reset state, while the SELECT phase selects the logic configuration to be written into the FPGA. The WRITE phase writes the selected configuration code into the respective logic cells of the FPGA.

In addition to its main configuration function, the XC18V256SO20C can also be used to provide additional features, such as password protection and Downloadable Microcode (DMC). The password can be set to prevent unauthorized access to the FPGA configuration data, while the DMC feature allows for additional configuration data to be downloaded from external sources, such as from a remote server. This provides an additional layer of security for the FPGA configuration data.

The XC18V256SO20C provides a robust and secure way to program FPGAs. It is easy to use and cost-effective. It is suitable for a wide range of applications and provides a reliable and secure way of programming FPGAs.

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