Memory devices having special mode access using a serial message
First Claim
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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:
- 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 data field of the serial message is configured to cause the memory device to operate according to a one time programmable (OTP) access mode.
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Abstract
A memory device includes a serial interface controller that receives and operates using a serial message having a format that includes a command field of the serial message. The format also includes a register address field of the serial message immediately following the command field. The format further includes a data field of the serial message immediately following the register address field.
37 Citations
16 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 data field of the serial message is configured to cause the memory device to operate according to a one time programmable (OTP) access mode. - View Dependent Claims (2, 3)
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4. 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. - View Dependent Claims (5)
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6. A system comprising:
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a master device configured to generate a clock signal; and a memory device configured to interface with the master device using a serial peripheral interface protocol, wherein the memory device comprises a controller; wherein the master device is configured to; enable the controller; send the clock signal to the controller; send a message to the controller, wherein the message comprises; a command field of the message configured to enable the controller to access volatile memory registers of the memory device; a register address field of the message immediately following the command field indicating an address of a volatile memory register of the volatile memory registers; and a data field of the message immediately following the register address field; wherein the controller is configured to; access the volatile memory registers of the memory device that control operation of a memory array by storing bits in response to receiving the message from the master device; and interpret the command field as enabling write access to a special mode enable register of the memory device. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. 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 data field of the serial message is configured to cause the memory device to operate according to a block lock access mode, wherein the block lock access mode is configured to enable the memory device to prevent writing to a page of one time programmable (OTP) memory of the memory device. - View Dependent Claims (14, 15)
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16. 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; and identify a special mode enable register based on the address in the register address field.
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Specification