Method, system and apparatus for determining that a programming

Details Method, system and apparatus for determining that a programming Method, system and apparatus for determining that a programming

1999-09-24

2000-12-26

Mai, Son

Static information storage and retrieval

Floating gate

Particular biasing

36518524, 365228, 365229, G11C 1604, G11C 1606

Patent

active

061669601

ABSTRACT:
An electronic system, comprising a digital processor and an EEPROM, has circuit logic and program software or firmware for determining if a programming voltage level is sufficient for reliably programming the EEPROM. A charge pump is enabled and generates a voltage used for programming of the EEPROM. The enabled charge pump thereby loads a battery power supply. In addition, a test load may be connected to the output of the charge pump to simulate the EEPROM load during a programming operation to the EEPROM. The charge pump output voltage is measured to determine if at least a desired voltage value is obtained. Once the charge pump voltage level has been pre-qualified for the desired voltage value, an actual programming operation to the EEPROM may be performed. If the voltage level does not reach the desired value then a programming operation is inhibited and the electronic system may alarm or shut down operation. The charge pump voltage level is a good indication and measure of battery charge condition under actual EEPROM programming load conditions.

REFERENCES:
patent: 5508971 (1996-04-01), Cernea et al.
patent: 5663918 (1997-09-01), Javanifard et al.
patent: 5925139 (1999-07-01), Yamada et al.
patent: 6038190 (2000-03-01), Kowalski et al.

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