Memory devices having special mode access
First Claim
1. A memory device comprising a register, a memory array, and a serial interface controller configured to receive and operate using a serial message to access the register that controls operation of the memory array by storing bits, the serial message having a format that comprises:
- a command field of the serial message configured to enable the serial interface controller to access the register;
a register address field of the serial message immediately following the command field indicating an address of the register; and
a data field of the serial message immediately following the register address field;
wherein the serial interface controller is configured to receive the serial message, wherein the command field of the serial message comprises a command that the serial interface controller is configured to interpret as enabling write access to a special mode enable register of the memory device, wherein the address of the register is configured to identify the special mode enable register, wherein the data field of the serial message comprises data to be written into the special mode enable register that is configured, when written into the special mode enable register, to cause the memory device to operate according to a special mode of operation, wherein the special mode of operation comprises a one time programmable (OTP) access mode, a parameter page access mode, or a block lock access mode, or any combination thereof.
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Accused Products
Abstract
Memory devices are provided that include special operating modes accessible upon receipt of a particular message from a host. One device includes a memory array, a special mode enable register, and a controller. When the controller receives a register write command to write first data into the special mode enable register and the memory device does so, the memory device operates in a first mode. When the controller receives a register write command to write second data into the special mode enable register and the memory device does so, the memory device operates in a second mode.
39 Citations
10 Claims
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1. A memory device comprising a register, a memory array, and a serial interface controller configured to receive and operate using a serial message to access the register that controls operation of the memory array by storing bits, the serial message having a format that comprises:
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a command field of the serial message configured to enable the serial interface controller to access the register; a register address field of the serial message immediately following the command field indicating an address of the register; and a data field of the serial message immediately following the register address field; wherein the serial interface controller is configured to receive the serial message, wherein the command field of the serial message comprises a command that the serial interface controller is configured to interpret as enabling write access to a special mode enable register of the memory device, wherein the address of the register is configured to identify the special mode enable register, wherein the data field of the serial message comprises data to be written into the special mode enable register that is configured, when written into the special mode enable register, to cause the memory device to operate according to a special mode of operation, wherein the special mode of operation comprises a one time programmable (OTP) access mode, a parameter page access mode, or a block lock access mode, or any combination thereof. - View Dependent Claims (2)
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3. A memory device, comprising:
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a serial interface controller; a register coupled to the serial interface controller; and a memory array coupled to the serial interface controller, wherein the serial interface controller is configured to receive and operate using a serial message comprising a command field configured to enable the serial interface controller to access the register, a register address field immediately following the command field indicating an address of the register, and a data field immediately following the register address field to access the register that controls operation of the memory array by storing bits; wherein the serial interface controller is configured to write data of the data field into a special mode enable register to cause the memory device to operate according to a special mode of operation, wherein the special mode of operation comprises a one time programmable (OTP) access mode, a parameter page access mode, or a block lock access mode, or any combination thereof. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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Specification