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System and method for authentication,ROM (Read Only Memory) and layout thereof,Method and microprocessor for reducing static and dynamic power consumption of multi-pin microcontroller

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3 results about "Read-only memory" patented technology

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Read-only memory (ROM) is a type of non-volatile memory used in computers and other electronic devices. Data stored in ROM cannot be electronically modified after the manufacture of the memory device. Read-only memory is useful for storing software that is rarely changed during the life of the system, sometimes known as firmware. Software applications for programmable devices can be distributed as plug-in cartridges containing read-only memory.

System and method for authentication

ActiveUS20050081064A1Digital data processing detailsUser identity/authority verificationAuthentication systemRead-only memory

An authentication system (10) to verify a password is provided. The authentication system includes a first storage unit (16) to store an authentication sequence (24) and a read-only memory unit (18) on which an authentication algorithm (26) is programmed. A microcontroller (20) is coupled to the first storage unit, the read-only memory unit and a web server. The microcontroller receives the password and executes the authentication algorithm to verify the password with the authentication sequence. A second storage unit (22) is coupled to the microcontroller to store data from the web server. Access to a second storage unit is permitted by the microcontroller only if the password has been verified.

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Owner:TREK 2000 INT

ROM (Read Only Memory) and layout thereof

InactiveCN103093823ASolid-state devicesRead-only memoriesOxide semiconductorRead-only memory

The invention discloses a ROM and a layout thereof. The ROM comprises at least one MOS (Metal Oxide Semiconductor) tube, bit lines and word lines, wherein each MOS tube is corresponding to at least two bit lines, and based on the connection states of two or more bit lines and the MOS tube, the MOS tube can store more than two types of state information. Namely, under the premise of fixed storage area of the ROM, by increasing the number of bit line regions, programmable information of one MOS tube of the ROM is more than 1 bit, and correspondingly, the storage area of the 1 bit of information is reduced.

ROM (Read Only Memory) and layout thereof

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Owner:苏州兆芯半导体科技有限公司

Method and microprocessor for reducing static and dynamic power consumption of multi-pin microcontroller

ActiveCN102681447AReduce dynamic power consumptionExtended service lifeProgramme control in sequence/logic controllersMicrocontrollerElectricity

The invention discloses a method for reducing the static and dynamic power consumption of a multi-pin microcontroller. The microcontroller is powered by a battery, a static read-only memory which is equal to the storage capacity of an embedded-type nonvolatile memory for storing a user program is embedded inside a chip of the microcontroller, after the microcontroller is electrified, a user program code of the embedded-type nonvolatile memory is imaged onto the static read-only memory through a direct memory access module, then the power of the embedded-type nonvolatile memory is turned off, a program pointer pointing towards original embedded-type nonvolatile memory is mapped onto the imaged static read-only memory, and the user program is executed on the static read-only memory. The invention also discloses a microprocessor for realizing the method. Due to the adoption of the method and the microprocessor, the static and dynamic power consumption of the microcontroller which is powered by the battery can be effectively reduced, and the service life of the battery can be prolonged.

Owner:SHANGHAI HUAHONG INTEGRATED CIRCUIT

3 results about "Read-only memory" patented technology

System and method for authentication

ROM (Read Only Memory) and layout thereof

Method and microprocessor for reducing static and dynamic power consumption of multi-pin microcontroller

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