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Controller integrated circuit for non-volatile memory system and method of operation thereof

A memory system, integrated circuit technology, applied in the field of determining and adjusting the core operating voltage on the integrated circuit, can solve problems such as the accuracy is not so good

Active Publication Date: 2019-01-22
SANDISK TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] While this technique can be used to adjust the operating voltage of the controller, it requires a trimming process and the trimming values ​​need to be stored in a one-time program, using valuable circuit area
Further, while trimming may be accurate when set, the accuracy may not be as good over time or as operating conditions change

Method used

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  • Controller integrated circuit for non-volatile memory system and method of operation thereof
  • Controller integrated circuit for non-volatile memory system and method of operation thereof
  • Controller integrated circuit for non-volatile memory system and method of operation thereof

Examples

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Embodiment Construction

[0016] memory system

[0017] figure 1 The main hardware components of a memory system suitable for implementing the following are schematically shown. Memory system 90 typically operates with host 80 through a host interface. For example, a memory system may take the form of removable memory, such as a memory card, an embedded memory system, or a solid state drive (SSD). The memory system 90 includes a memory 102 whose operation is controlled by a controller 100 . Memory 102 includes one or more arrays of non-volatile memory cells distributed over one or more integrated circuit chips. The controller 100 may include an interface circuit 110, a processor 120, a ROM (Read Only Memory) 122, a RAM (Random Access Memory) 130, a programmable nonvolatile memory 124, and other components. The controller is typically formed as an ASI C (Application Specific Integrated Circuit), and the components included in such an ASI C usually depend on the particular application.

[0018] Wi...

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Abstract

The timing and power consumption of the controller circuit depends on process, voltage and temperature. If the controller ASIC can measure the average voltage level during runtime, firmware can use this information to adjust the voltage for optimal speed / power performance. The voltage detector generates an output of, for example, 3 bits, where each state of the three-bit bus represents a voltage band. These bits can then be used by the firmware to trim the appropriate regulator to step up / down the voltage. This can be done for both core and I / O voltages. The firmware can be further optimized to take into account the status of temperature detectors and process detectors as well as voltage band detectors in order to optimize system performance.

Description

technical field [0001] This application relates to techniques for determining and adjusting core operating voltages on integrated circuits, such as non-volatile memory controllers. Background technique [0002] Controller circuits for non-volatile memory devices frequently have voltage regulators. The voltage level of the regulator is process dependent. During the wafer sort process, each voltage regulator on each die is tested for the proper voltage level and trimmed to provide the required voltage level. Trimmed values ​​can then be stored in on-circuit one-time programmable memory. Next time, when the die is powered up, the value stored in the one-time programmable memory can be read and the voltage level of the regulator raised / lowered to the desired level. The above procedure can also be repeated for other regulators on the ASI C. [0003] While this technique can be used to adjust the operating voltage of the controller, it requires a trimming process and the trimm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11C16/04G11C16/30G11C29/02G05F1/565
CPCG05F1/565G11C16/0483G11C16/30G11C29/021G11C29/028G11C11/5628H10B43/27G11C16/26
Inventor V.索麦亚
Owner SANDISK TECH LLC