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Chip possessing programmable and no-volatile memory on- system and off-system

A volatile memory and non-volatile technology, applied in the direction of static memory, read-only memory, digital memory information, etc., can solve the problems of not being able to program MTP16, not being able to program chip 10, etc.

Inactive Publication Date: 2006-05-17
ELAN MICROELECTRONICS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter whether the complete memory 22 is made on the chip 10, or the boost circuit 18 and the state machine 20 are removed in order to reduce the area and cost, the user cannot program the chip 10 on the system, because the MTP 16 stores the program code of the CPU 12 so that the microcontroller 10 cannot program its own MTP 16

Method used

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  • Chip possessing programmable and no-volatile memory on- system and off-system
  • Chip possessing programmable and no-volatile memory on- system and off-system
  • Chip possessing programmable and no-volatile memory on- system and off-system

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Embodiment Construction

[0044] figure 2is a schematic diagram according to the first embodiment of the present invention. In chip 30, control circuit 32 is connected with off-system programmable nonvolatile memory 36 and on-system programmable nonvolatile memory 42, SRAM 34 and input / output unit 35 are connected with control circuit 32, booster circuit 38 and State machine 40 is coupled to on-system programmable non-volatile memory 42, which includes a flash memory array. The chip 30 includes a programming mode and an operating mode. In the programming mode, the off-system programmable non-volatile memory 36 can be programmed. In the operating mode, the on-system programmable non-volatile memory 42 can be programmed. However, when programming the off-system programmable nonvolatile memory 36, the programming voltage VPP and VNN are supplied externally by the chip 30 to the off-system programmable nonvolatile memory 36; When the non-volatile memory 42 is used, the boost circuit 38 generates the pro...

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Abstract

An on-system programmable and off-system programmable chip, comprising a control circuit connected to the on-system programmable nonvolatile memory and off-system programmable nonvolatile memory, and a boost circuit connected to the on-system programmable nonvolatile memory Program nonvolatile memory. In the programming mode of the chip, the programming voltage required for programming the off-system programmable non-volatile memory is provided externally from the chip, and in the operating mode of the chip, the boost circuit is supplied from the chip’s The power supply voltage generates a programming voltage and supplies the on-system programmable non-volatile memory to program the on-system programmable non-volatile memory.

Description

technical field [0001] The present invention relates to a programmable chip, in particular to an on-system programmable nonvolatile memory (on-system programmable nonvolatile memory) and an off-system programmable nonvolatile memory (off-system programmable nonvolatile memory) The chip and its forming method and programming method. Background technique [0002] To use electrically programmable non-volatile memory, such as flash memory and electrically erasable programmable memory, a boosting circuit must be configured next to the memory array. The required high voltage is supplied during programming or erasing (erase) of the memory, and the high voltage is several times of the power supply voltage, which is related to the number of stages of boosting. In addition, writing more bits at a time can shorten the writing time and increase the programming speed, so the boost circuit is also a high-current device. Due to the high voltage and high current, the boost circuit occupie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/00G11C16/00G11C14/00
Inventor 邱延诚唐春安林光宇唐承豪
Owner ELAN MICROELECTRONICS CORPORATION