Memory device in mobile phone
First Claim
1. A memory device for a mobile phone comprising:
- a flash memory for storing program data and user data;
an interface circuit for copying program data stored in the flash memory according to whether data stored in the flash memory is valid;
a first Random Access Memory (RAM) for providing an operation area to store and execute the copied program data; and
a second RAM for storing data generated during the execution of program data,wherein the first and second RAMs are independent memories,wherein the interface circuit comprises a first logic gate for generating a NAND CE (chip enable) signal, said NAND CE signal enabling the flash memory, andwherein the interface circuit further comprises a second logic gate for generating a CLE (command latch enable) signal, said CLE signal informing the flash memory that incoming data is a command.
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Accused Products
Abstract
A memory device for a mobile phone is provided. The memory device includes a flash memory for storing program data and user data; an interface circuit configured for interfacing the flash memory to a microprocessor; a first memory for copying the program data of the flash memory; and a second memory for executing the program data of the first memory wherein the first and second memories are independent memories. The flash memory is a NAND-type flash memory and the interface circuit is an application-specific integrated circuit (ASIC) including a read-only memory (ROM) for storing program codes and an error correction circuit. Additionally, the first and second memories are preferably random-access memories (RAM). By utilizing a NAND-type flash memory in place of a conventional NOR-type flash memory, the memory device can achieve a larger storage capacity at a lower cost.
22 Citations
14 Claims
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1. A memory device for a mobile phone comprising:
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a flash memory for storing program data and user data; an interface circuit for copying program data stored in the flash memory according to whether data stored in the flash memory is valid; a first Random Access Memory (RAM) for providing an operation area to store and execute the copied program data; and a second RAM for storing data generated during the execution of program data, wherein the first and second RAMs are independent memories, wherein the interface circuit comprises a first logic gate for generating a NAND CE (chip enable) signal, said NAND CE signal enabling the flash memory, and wherein the interface circuit further comprises a second logic gate for generating a CLE (command latch enable) signal, said CLE signal informing the flash memory that incoming data is a command. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A mobile communication device comprising:
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an analog circuit for air interfacing the mobile communication device; a user interface circuit for interfacing between the mobile communication device and a user; a microprocessor (MPU) for providing overall control of the operation of the mobile device; and a memory device including a flash memory for storing program data and user data; an interface circuit for interfacing the flash memory to the microprocessor, wherein the interface circuit is an application-specific integrated circuit (ASIC) including a read-only memory (ROM) for storing program codes and an error correction circuit; a first memory for copying the program data of the flash memory; and a second memory for executing the program data of the first memory, wherein the first and second memories are independent memories, wherein the interface circuit comprises a first logic gate for generating a NAND CE (chip enable) signal, said NAND CE signal enabling the flash memory, and wherein the interface circuit further comprises a second logic gate for generating a CLE (command latch enable) signal, said CLE signal informing the flash memory that incoming data is a command. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification