MEMORY SYSTEM IN WHICH EXTENDED FUNCTION CAN EASILY BE SET
First Claim
1. A memory system comprising:
- a nonvolatile semiconductor memory device;
a control section configured to control the nonvolatile semiconductor memory device;
a memory serving as a work area connected to the control section;
an extended function section to be controlled by the control section; and
an extension register provided on the memory or on the control section, the extension register being capable of defining an interface controlling an extended function of the extended function section, whereinthe control section processes a first command to read the extension register in units of predetermined data lengths, and a second command to write data to the extension register in units of predetermined data lengths,the extension register includes a first area, and a second area different from the first area, information configured to specify a type of the extended function and a controllable driver, and address information indicating a place to which the extended function is assigned, the place being on the extension register, are recorded in the first area, and the second area includes the extended function.
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Accused Products
Abstract
According to one embodiment, a memory system, such as a SDIO card, includes a nonvolatile semiconductor memory device, a control section, a memory, an extended function section, and an extension register. The extended function section is controlled by the control section. A first command reads data from the extension register in units of given data lengths. A second command writes data to the extension register in units of given data lengths. A extension register includes a first area, and second area different from the first area, information configured to specify a type of the extended function and controllable driver, and address information indicating a place to which the extended function is assigned, the place being on the extension register, are recorded in the first area, and the second area includes the extended function.
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Citations
14 Claims
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1. A memory system comprising:
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a nonvolatile semiconductor memory device; a control section configured to control the nonvolatile semiconductor memory device; a memory serving as a work area connected to the control section; an extended function section to be controlled by the control section; and an extension register provided on the memory or on the control section, the extension register being capable of defining an interface controlling an extended function of the extended function section, wherein the control section processes a first command to read the extension register in units of predetermined data lengths, and a second command to write data to the extension register in units of predetermined data lengths, the extension register includes a first area, and a second area different from the first area, information configured to specify a type of the extended function and a controllable driver, and address information indicating a place to which the extended function is assigned, the place being on the extension register, are recorded in the first area, and the second area includes the extended function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification