A NOVEL COMBO MEMORY DESIGN AND TECHNOLOGY FOR MULTIPLE-FUNCTION JAVA CARD, SIM-CARD BIO-PASSPORT AND BIO-ID CARD APPLICATIONS

摘要

A combination volatile and nonvolatile memory integrated circuit has at least one volatile memory array placed on the substrate and multiple nonvolatile memory arrays. The volatile and nonvolatile memory arrays have address space associated with each other such that each array may be addressed with common addressing signals. The combination volatile and nonvolatile memory integrated circuit further has a memory control circuit in communication with external circuitry to receive address, command, and data signals. The memory control circuit interprets the address, command, and data signals, and for transfer to the volatile memory array and the nonvolatile memory arrays for reading, writing, programming, and erasing the volatile and nonvolatile memory arrays. The volatile memory arrays is may be a SRAM, a pseudo SRAM, or a DRAM. Any of the nonvolatile memory arrays maybe masked programmed ROM arrays, NAND configured flash memory NAND configured EEPROM.