System for programming EEPROM with data loaded in ROM by sending

Boots – shoes – and leggings

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Details

3642457, 364260, 3642628, 364DIG1, 36496581, G06F 1300

Patent

active

052768392

ABSTRACT:
An EEPROM programming circuit is disclosed which provides for the on-board rogramming of a EEPROM memory using:
a microprocessor, a bootstrap ROM, a UART communications port, and a Eccles-Jordan flip flop switch system. These elements are electrically connected to a host system and the EEPROM by a central data bus. In normal operation, the host system sends a first set of data signals through the circuit to the EEPROM, which produces a set of processed signals. In operation in the programming mode the host system sends a second set of data signals to cause the microprocessor to send a switch signal to the Eccles-Jordan flip flop switch and to the bootstrap ROM. The bootstrap ROM contains the program code that forms the programs that are used to program the EEPROM. The Eccles-Jordan flip flop switch works with the communications port to serve as a means of isolating the EEPROM from the host system and directly connecting to EEPROM is the bootstrap ROM for programming when receiving the switch signal from the microprocessor.

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