XC18V256PC20I

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The XC18V256PC20I is an integrated circuit commonly used with Field Programmable Gate Array (FPGA) devices. It is a configuration prom, also referred to as a serial EEPROM, which allows the FPGA to configure itself at power-up and to provide non-volatile storage for other user data.

The XC18V256PC20I is a member of the Xilinx XC18V family of devices, and is designed specifically for Xilinx FPGAs. It is housed in an industry-standard SO-20 package, and utilizes the two-wire interface to provide a low pin count solution. The device has an 8-bit data bus, four control pins, and a write-protect pin which can be configured to require a pull-up resistor or a pull-down resistor. The device also includes a power-on reset circuit which is used to ensure that the device is properly reset in the event of a system reset.

The XC18V256PC20I is used to store configuration data for FPGAs. This configuration data is used to define the initial state of the FPGA and to configure its various functions, such as the logic and interconnect elements. The configuration data is specified by the user and is typically stored in the XC18V256PC20I in the form of a bitstream. At power-up, the XC18V256PC20I provides the bitstream to the FPGA, and the FPGA configures itself accordingly.

The XC18V256PC20I also provides non-volatile storage for other user data. This can include user settings, as well as data that needs to be retained when the system is powered down. Data stored in the device is protected by a write-protect pin, which can be configured to require a pull-up or a pull-down resistor. The device also includes a non-volatile memory test to ensure that data stored in the device is valid.

The XC18V256PC20I is a reliable and cost-effective solution for providing configuration data and non-volatile storage to FPGAs. It is typically used in embedded systems, automotive applications, and industrial process control. Due to its low pin count, it is also suitable for use in applications where space is at a premium. It is a cost-effective way to ensure that an FPGA can configure itself at power-up, and to provide non-volatile storage for other user data.

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