Nonvolatile Memory Multi-chip Module

A Nonvolatile Memory Multi-Chip Module (NVM MCM) has been developed that can be used as a building block for bulk nonvolatile memory boards or to provide nonvolatile memory for processor boards. The memory is organized as a 256Kilowords by 40-bits device. The device is packaged as a 1.45" x 1.45" ceramic leadless solder-free-interconnect padgrid-may. The NVM MCM supports the "L-Bus" protocol of the Intel 80960MC. This protocol defines a 32-bit multiplexed address and data bus and allows burst lransfers of up to four words. Module circuitry includes address decode, registered addresses, up to four-word burst read cycles, and program and erase capability. This MCM consists of five 256K x 8 twelvevolt Flash EPROMs, two Octal registers, two PALS and one Quad two-input NAND gate.