Memory system allowing fast operation of processor while using flash memory incapable of random access
First Claim
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1. A memory system, comprising:
- a non-volatile memory;
a main memory connected to an external bus to which a processor is connected;
a transfer control portion controlling direct memory access transfer between said non-volatile memory and said main memory; and
a bus conversion portion performing conversion between parallel data and serial data between said non-volatile memory and said main memory.
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Abstract
A DMA control circuit controls DMA transfer between a flash memory and a main memory. An S/P bus conversion circuit converts serial data output from the flash memory into parallel data and outputs the parallel data to the main memory. This eliminates the need for the CPU downloading file data from the flash memory to the main memory, allowing connection of a non-volatile memory with a large capacity, without reduction in the processing speed of the system.
37 Citations
8 Claims
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1. A memory system, comprising:
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a non-volatile memory;
a main memory connected to an external bus to which a processor is connected;
a transfer control portion controlling direct memory access transfer between said non-volatile memory and said main memory; and
a bus conversion portion performing conversion between parallel data and serial data between said non-volatile memory and said main memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification