Nonvolatile memory card with an address table and an address tra

Details Nonvolatile memory card with an address table and an address tra Nonvolatile memory card with an address table and an address tra

1993-06-30

1996-06-04

Swann, Tod R.

Static information storage and retrieval

Magnetic bubbles

Guide structure

39542101, 365 52, 36518509, 36518529, 365195, 235380, G06F 1200, G06F 1300, G11C 1606

Patent

active

055242316

ABSTRACT:
A nonvolatile memory card includes first memory and a second memory. The first memory includes a first block and a second block, each can be addressed by a first block address and a second block address, respectively. The second memory includes a third block and a fourth block, each can be addressed by a third block address and a fourth block address, respectively. An address table is used for storing (1) each of the first, second, third, and fourth block addresses and (2) a first, a second, a third, and a fourth status data, each indicating the operational condition of one of the first, second, third, and fourth blocks, respectively. Each of the first, second, third, and fourth status data can be in a first state and a second state. When a particular one of the first, second, third, and fourth blocks is non-operational, the corresponding one of the first, second, third, and fourth status data is at the first state. An address translation logic is coupled to (1) the address table and (2) the first and second memories for receiving external addresses to access memory locations within the first and second memories, and for converting the external addresses to access the memory locations in only the operational ones of the first, second, third, and fourth blocks such that the external addresses are consecutive while at least one of the first, second, third, and fourth blocks can be non-operational. Each of the external addresses includes a block address and an address associated with the block address.

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