XC1765EPD8I

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The XC1765EPD8I is an 8-pin Flash Configuration PROM, with in-system programming (ISP) capability, designed for Field Programmable Gate Array (FPGA) configuration. It is designed to be used in conjunction with Xilinx\'s XC4000, XC5000, XQR3000 and XQR4000 families of FPGA. This PROM enables these FPGA devices to be configured with a desired logic function permanently stored in this PROM. The logic function is also called the configuration bitstream.

The PROM device is designed to use low voltage programming levels that facilitate FPGA programming in circuit, making the ISP operations very simplified. The PROM aids in creating high density FPGA designs that can be programmed while they are still on the customers circuit board or on their own circuit board. This functionality helps to reduce the overall cost and time required for configuring FPGA designs.

The XC1765EPD8I is a volatile PROM that uses Xilinx’s proprietary Ultrastore programming technology to store configuration data. It features a stable 8-pin package and low supply voltage requirements of 2.3V to 5V. This device is not managed by the more advanced Xilinx configuration device managers such as CPLD\'s and FPGA\'s.

The XC1765EPD8I comes in industry standard SOIC, SSOP and TSSOP packages and is available in variety of sizes and densities. The device is capable of storing up to 4K of configuration data in a single package. The programmable bits can be used for a variety of functions such as configuration, data storage, protection, and user programmable functions such as security, diagnostics, and monitoring.

The XC1765EPD8I uses Xilinx\'s proprietary programming algorithm called In-Circuit Serial Programming (ICSP) to download the configuration bitstream. The ICSP interface provides two ports, one for an external microcontroller and another for an optional USB or I2C connector. The microcontroller communicates with the PROM via the two ICSP ports to initiate the download of configuration bitstream data through special commands. The data is then transferred to the FPGA via the ICSP port on the PROM.

The XC1765EPD8I also provides an on-chip test and diagnostic feature called Signature Completion. Signature completion is a feature that monitors the data integrity of the configuration bitstream stored in the PROM and the FPGA. It ensures that the configuration bitstream is unaffected by any errors that may have been introduced during downloading or due to corrupted data.

In order to configure the PROM, the device output and ICSP ports must be connected to the ICSP controller. After the signals are connected, the ICSP controller sends special commands over the ICSP port to transfer the desired bitstream to the PROM. Once the programming is completed, the ICSP controller then sends a special command to the PROM to confirm the data has been stored correctly.

The XC1765EPD8I is ideal for applications that require secure and permanent FPGA configuration in the field. It can provide a high degree of protection against unauthorized modifications or theft. It also provides simple programming that can be done in circuit, making it easy to maintain and configure FPGA designs. The XC1765EPD8I is an ideal choice for applications that require a cost effective, low power and secure solution for permanent FPGA configuration.

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