公开(公告)号：JP2001155491A

公开(公告)日：2001-06-08

申请号：JP2000291329

申请日：2000-09-25

Applicant: MICROCHIP TECH INC

Inventor： MARNEWECK WILLEM ,  CHEN MEILING ,  SMIT WILLEM

IPC: G11C17/00 ,  G06F12/16 ,  G06F15/78 ,  G11C16/02 ,  G11C16/06 ,  G11C16/14 ,  G11C16/22 ,  G11C16/30 ,  G11C29/12 ,  G11C29/00

Abstract: PROBLEM TO BE SOLVED: To provide a system, method, and a device for programming so that an EEPROM having non-volatile stored data has reliability. SOLUTION: This electronic system comprises a microcontroller core logic 102, an EEPROM 112, an EEPROM programming logic 114, and a charge pump 116 for generating EEPROM programming voltage, programming voltage generated by the charge pump is compared with reference voltage by a voltage comparator 118, when the programming voltage is a desired value or more, the programming logic is enabled so as to perform programming processing on the EEPROM, when the programming voltage is a desired value or less, the programming logic is suppressed to perform programming processing on the EEPROM.

公开(公告)号：DE60033752D1

公开(公告)日：2007-04-19

申请号：DE60033752

申请日：2000-09-22

Applicant: MICROCHIP TECH INC

Inventor： MARNEWECK WILLEM ,  CHEN MEILING ,  SMIT WILLEM

IPC: G11C16/22 ,  G11C17/00 ,  G06F12/16 ,  G06F15/78 ,  G11C5/14 ,  G11C16/02 ,  G11C16/06 ,  G11C16/14 ,  G11C16/30 ,  G11C29/12

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.

公开(公告)号：DE60033752T2

公开(公告)日：2007-11-08

申请号：DE60033752

申请日：2000-09-22

Applicant: MICROCHIP TECH INC

Inventor： MARNEWECK WILLEM ,  CHEN MEILING ,  SMIT WILLEM

IPC: G11C16/22 ,  G11C17/00 ,  G06F12/16 ,  G06F15/78 ,  G11C5/14 ,  G11C16/02 ,  G11C16/06 ,  G11C16/14 ,  G11C16/30 ,  G11C29/12

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.

公开(公告)号：AT356409T

公开(公告)日：2007-03-15

申请号：AT00120721

申请日：2000-09-22

Applicant: MICROCHIP TECH INC

Inventor： MARNEWECK WILLEM ,  CHEN MEILING ,  SMIT WILLEM

IPC: G11C17/00 ,  G06F12/16 ,  G06F15/78 ,  G11C16/02 ,  G11C16/06 ,  G11C16/14 ,  G11C16/22 ,  G11C16/30 ,  G11C29/12 ,  G11C5/14

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.