A chip startup method and a flash chip

A chip and reference circuit technology, applied in the field of FLASH chip and chip start-up, can solve the problems of long time and long time of FLASH chip, etc., and achieve the effect of improving efficiency, shortening start-up time, and shortening the time of output voltage

Active Publication Date: 2021-09-24
HEFEI GEYI INTEGRATED CIRCUIT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, since the bandgap reference circuit is generally a closed-loop feedback loop, it needs to go through the process of positive feedback, negative feedback, and oscillation stabilization from start-up to stable output of the reference voltage. Therefore, the output of the reference voltage required by the bandgap reference circuit It takes a long time, which makes it take a long time for the entire FLASH chip to start and then return to the normal working state

Method used

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  • A chip startup method and a flash chip
  • A chip startup method and a flash chip
  • A chip startup method and a flash chip

Examples

Experimental program
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Effect test

Embodiment 1

[0044] refer to figure 2 , shows a flow chart of the steps of an embodiment of a chip startup method of the present application, the method is applied to a FLASH chip including at least one fast reference circuit, a bandgap reference circuit, a buffer, at least one charge pump and a memory array, wherein , at least one fast reference circuit is connected in parallel with the bandgap reference circuit, and the parallel circuit composed of at least one fast reference circuit and the bandgap reference circuit is connected in series with the buffer, at least one charge pump and the memory array in sequence, and the method may specifically include the following steps :

[0045] Step 201: When the power supply voltage is input, output the initial reference voltage through the fast reference circuit corresponding to the power supply voltage, and output the reference voltage through the bandgap reference circuit; wherein, the time taken by the fast reference circuit to output the ini...

Embodiment 2

[0053] refer to Figure 3A , shows a flow chart of the steps of an embodiment of a chip startup method of the present application, the method is applied to a FLASH chip including at least one fast reference circuit, a bandgap reference circuit, a buffer, at least one charge pump and a memory array, wherein , at least one fast reference circuit is connected in parallel with the bandgap reference circuit, and the parallel circuit composed of at least one fast reference circuit and the bandgap reference circuit is connected in series with the buffer, at least one charge pump and the memory array in sequence, and the method may specifically include the following steps :

[0054] Step 301: When the power supply voltage is input, the initial reference voltage is output through the fast reference circuit corresponding to the power supply voltage, and the reference voltage is output through the bandgap reference circuit; wherein, the time taken by the fast reference circuit to output ...

Embodiment 3

[0083] refer to Figure 4 , shows a structural block diagram of a FLASH chip 400 of the present application, and the FLASH chip may specifically include: a fast reference circuit 401, a bandgap reference circuit 402, a buffer 403, at least one charge pump 404, a memory array 405 and a switch module 406; wherein, the fast reference circuit 401 is connected in parallel with the bandgap reference circuit 402, and the parallel circuit composed of the fast reference circuit 401 and the bandgap reference circuit 402 is connected in series with the buffer 403, at least one charge pump 404 and the memory array 405 in sequence.

[0084] A fast reference circuit 401, configured to output an initial reference voltage when the power supply voltage is input;

[0085] A bandgap reference circuit 402, configured to output a reference voltage when the power supply voltage is input;

[0086] Wherein, the time used by the fast reference circuit 401 to output the initial reference voltage is le...

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Abstract

The embodiments of the present application provide a chip startup method and a FLASH chip. The method includes: when a power supply voltage is input, outputting an initial reference voltage through a fast reference circuit corresponding to the power supply voltage, and outputting a reference voltage through a bandgap reference circuit ; wherein, the time taken by the fast reference circuit to output the initial reference voltage is less than the time taken by the bandgap reference circuit to output the reference voltage; the initial reference voltage is input into the buffer to start the buffer, and at least one charge pump and Storage array; after the bandgap reference circuit outputs the reference voltage, the initial reference voltage input to the buffer is switched to the reference voltage. In the embodiment of the present application, a fast reference circuit is newly added to the FLASH chip, and the buffer, the charge pump and the storage array are started by the initial reference voltage output by the circuit, thereby starting the FLASH chip, which greatly shortens the startup time of the chip and improves the reading and writing of the chip. data efficiency.

Description

technical field [0001] The present application relates to the field of chip technology, in particular to a method for starting a chip and a FLASH chip. Background technique [0002] FLASH is widely used in various electronic devices because of its advantage of keeping internal data from being lost even when the power is turned off. Usually, in order to save power, users can power off the FLASH when they do not need to use it. At this time, the FLASH enters a deep standby state. When the user needs to use the FLASH, the chip of the FLASH needs to be activated to restore the FLASH to normal operation. state. [0003] In order to facilitate the description of the process of FLASH recovering from the deep standby state to the normal working state under normal circumstances, the internal structure of the FLASH chip is firstly introduced. like figure 1 As shown, the FLASH chip mainly includes a bandgap reference circuit, a buffer, a charge pump and a memory array, and these fou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11C5/14G11C16/30
CPCG11C5/147G11C5/148G11C16/30
Inventor 胡俊刘铭
Owner HEFEI GEYI INTEGRATED CIRCUIT CO LTD
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