摘要:
In an information processing system, a plurality of information processing devices CHIP0 and CHIP1 are connected to multiport memory MPMEM0 that has a plurality of ports, and memory areas in multiport memory MPMEM0 can be altered to memory areas occupied by particular ports and memory areas shared by a plurality of ports. At such times, immediately after the occurrence of a request from a port, the status of this request may be supplied from other ports.
摘要:
A random access memory includes a data signal line, a data-synchronization signal line for a data synchronization signal which provides a synchronization signal when data is transmitted to the data signal line, and a setting module. The setting module determines whether the data signal line is set to be a data signal line for common input/output use, a data signal line for output-only use, or a data signal line for input-only use, and further determines whether the data-synchronization signal line is set to be a data-synchronization signal line for common input/output use, a data-synchronization signal line for output-only use, or a data-synchronization signal line for input-only use.
摘要:
A read cache and a write cache are made up of two kinds of nonvolatile memories whose characteristics are different. For example, nonvolatile memory whose write endurance is high is assigned to the write cache, nonvolatile memory whose write endurance is low is assigned to the read cache, and the management tables of data in these caches are stored in the nonvolatile memory whose write endurance is high. Alternatively, nonvolatile memory that has a fast write speed but has a slow read speed is adopted for the write cache and nonvolatile memory that has a fast read speed but has a slow write speed is adopted for the read cache.
摘要:
A memory system including ROM and RAM in which reading and writing are enabled. A memory system includes a non-volatile memory (FLASH), DRAM, a control circuit, and an information processing device. Data in FLASH is transferred to SRAM or DRAM in advance. Data transfer between the non-volatile memory and the DRAM can be performed in the background. The memory system including these plural chips is configured as a memory system module in which each chip is mutually laminated and each chip is wired via a ball grid array (BGA) and bonding wire between the chips. Data in FLASH can be read at the similar speed to that of DRAM by securing a region in which the data in FLASH can be copied in DRAM and transferring the data to DRAM in advance immediately after power is turned on or by a load instruction.
摘要:
A memory module fast in random accesses, large in capacity, and low in fabricating cost. And the memory module can assure high security. The memory module consists of a flash memory, a dynamic random access memory, and a control circuit. The control circuit enables data transfer between the flash memory and the dynamic random access memory only with a read operation for a specific address in the memory module. When reading data from the memory module, the control circuit refreshes the dynamic random access memory. Thus the present invention can realize a large capacity and low cost memory module capable of reading data fast reading and assuring high security.
摘要:
A control circuit of a semiconductor device (memory module) realizes long life and others by a mechanism that suppresses and smoothes variations in use of a memory by equalizing the sizes of data write and data erase with respect to a data write request and sequentially allocating and using addresses of the memory in data write to an overwritable non-volatile memory device without carrying out an overwriting operation even in the case of an overwrite request. The control circuit realizes data write by a set of two types of operations of (a) an operation of erasing data of a first address or an operation of setting a flag value to an invalid state and (b) an operation of writing data to a second address different from the first address or an operation of setting a flag value to a valid state.
摘要:
Efficient and convenient storage systems and methods are presented. In one embodiment a storage system includes a plurality of storage nodes and a master controller. The storage nodes store information. The storage node includes an upstream communication buffer which is locally controlled at the storage node to facilitate resolution of conflicts in upstream communications. The master controller controlls the flow of traffic to the node based upon constraints of the upstream communication buffer. In one embodiment, communication between the master controller and the node has a determined maximum latency. The storage node can be coupled to the master controller in accordance with a chain memory configuration.
摘要:
A small-diameter front-end portion of a feed rod is allowed to enter into the screw hole of a nut delivered by a nut chute, and the nut is fed to an intended position by the forward movement of the feed rod. When an abnormal nut having a screw hole into which the small-diameter front-end portion cannot be inserted is delivered, the abnormal nut is prevented from being flicked by the feed rod. In order to achieve this, in a standby state, the small-diameter front-end portion of the feed rod enters a nut receiving chamber and is then stopped. On condition that the abnormal nut is received in the nut receiving chamber, if the feed rod moves forward to enter into the standby state, the abnormal nut is slightly pushed out forward from the nut receiving chamber.
摘要:
A memory system including a non-volatile memory, a cache memory, a control circuit, and a data processing device is configured. The high speed can be achieved by transferring data in the non-volatile memory to the cache memory to retain the same therein. When the data in the non-volatile memory is transferred to the cache memory, error correction is performed so as to improve the reliability. Since the cache memory and the non-volatile memory can be accessed from the data processing device independently, improvement in usability can be achieved. The memory system including the plurality of chips is configured as a memory system module where respective chips are arranged in a stacked manner and wired by a ball grid array (BGA) and wire bonding between chips.
摘要:
A memory system including large-capacity ROM and RAM in which high-speed reading and writing are enabled is provided.A memory system including a non-volatile memory (CHIP1), DRAM (CHIP3), a control circuit (CHIP2) and an information processing device (CHIP4) is configured. Data in FLASH is transferred to SRAM or DRAM in advance to speed up. Data transfer between the non-volatile memory (FLASH) and DRAM (CHIP3) can be performed in the background. The memory system including these plural chips is configured as a memory system module in which each chip is mutually laminated and each chip is wired via a ball grid array (BGA) and bonding wire between the chips.As data in FLASH can be read at the similar speed to that of DRAM by securing a region in which the data in FLASH can be copied in DRAM and transferring the data to DRAM in advance immediately after power is turned on or by a load instruction, the performance and the function of a mobile device can be enhanced.