Method for in-system programming of serially configured EEPROMS using a JTAG interface of a field programmable gate array

摘要

A method for programming an electrically erasable programmable read only memory (EEPROM) while mounted on a printed circuit board. The EEPROM is used as a memory storage device for a field programmable gate array (FPGA), which is mounted on the printed circuit board. The board and FPGA have a joint test action group (JTAG) test interface. The FPGA contains a test access port (TAP) and user defined internal scan registers. The method includes providing a connection between the TAP of the FPGA and the EEPROM. Data is provided to the internal scan data registers of the FPGA via the JTAG test interface. Data is transferred via the internal scan data registers to the EEPROM without interrupting operation of the FPGA.