摘要:
A plurality of memory devices of mixed type (e.g., DRAMs, SRAMs, MRAMs, and NAND-, NOR- and AND-type Flash memories) are serially interconnected. Each device has device type information on its device type. A specific device type (DT) and a device identifier (ID) contained in a serial input (SI) as a packet are fed to one device of the serial interconnection. The device determines whether the fed DT matches the DT of the device. In a case of match, a calculator included in the device performs calculation to generate an ID for another device and the fed ID is latched in a register of the device. In a case of no-match, the ID generation is skipped and no ID is generated for another device. The DT is combined with the generated or the received ID depending on the device type match determination. The combined DT and ID is as a packet transferred to a next device. Such a device type match determination and ID generation or skip are performed in all devices of the serial interconnection. With reference to device type provided to the interconnected devices, IDs are sequentially generated. The SI containing the DT, the ID and an ID generation command is transmitted in a packet basis to a next device.
摘要:
A memory controller is unaware of device types (DTs) of a plurality (N) of series-connected memory devices in an interconnection configuration. Possible DTs include, e.g., random access memories and Flash memories. First, the memory controller sends a specific DT (“don't care”) and an initial number of binary code to the first device of the interconnection configuration and the binary code is propagated through the devices. Each device performs a “+1” calculation regardless of the DT. The last device provides the memory controller with Nד+1” from which the memory controller can obtain the number N of devices in the interconnection configuration. Thereafter, the memory controller sends a search number (SN) of binary code and a search DT for DT matching that propagate through the devices. Each device performs DT match determination of “previous match”, “present match” and “don't care match”. Based on the match determination, the SN and search DT are or not modified. The modified or non-modified SN and DT are propagated through the devices. Such processes are repeated. From the propagated SN and DT and the previously recognized number of the devices, the memory controller can identify the DT of each device in the interconnection configuration.
摘要:
A plurality of memory devices of mixed type (e.g., DRAMs, SRAMs, MRAMs and NAND-, NOR- and AND-type Flash memories) are serially interconnected. Each device has device type information on its device type. A specific device type (DT) and a device identifier (ID) contained in a serial input (SI) are fed to one device of the serial interconnection. The device determines whether the fed DT matches the DT of the device. In a case of match, a calculator included in the device performs calculation to generate an ID for another device and the fed ID is latched in a register of the device. The generated ID is transferred to another device of the serial interconnection. In a case of no match, the ID generation is skipped and no ID is generated for another device. Such a device type match determination and ID generation or skip are performed in all devices of the serial interconnection. In cases of different device types being separately provided to the interconnected devices, sequential IDs are generated in each of the different device types and also the total number of each device type are recognized. In a case of a “don't care” code is provided to the interconnected devices, sequential IDs are generated and also, the total number of the interconnected devices is recognized, regardless of the type differences.
摘要:
A plurality of memory devices of mixed type (e.g., DRAMs, SRAMs, MRAMs, and NAND-, NOR- and AND-type Flash memories) is serially interconnected. Each device has device type information on its device type. A specific device type (DT) and a device identifier (ID) contained in a serial input (SI) as a packet are fed to one device of the serial interconnection. The device determines whether the fed DT matches the DT of the device. In a case of match, a calculator included in the device performs calculation to generate an ID accompanying the fed DT for another device and the fed ID is latched in a register of the device. In a case of no match, the ID generation is skipped and no ID is generated for another device. The DT is combined with the generated or the received ID depending on the device type match determination. The combined DT and ID is as a packet transferred to a next device. Such a device type match determination and ID generation or skip are performed in all devices of the serial interconnection. With reference to device type provided to the interconnected devices, IDs are sequentially generated. The SI containing the DT, the ID and an ID generation command is transmitted in a packet basis to a next device. A memory controller can recognize the total number of one DT, in response to the ID received from the last device. In a case of a “don't care” DT is provided to the interconnected devices, IDs are sequentially generated and the total number of the interconnected devices is recognized, regardless of the differences in DTs of the devices.
摘要:
A memory controller is unaware of device types (DTs) of a plurality (N) of series-connected memory devices in an interconnection configuration. Possible DTs include, e.g., random access memories and Flash memories. First, the memory controller sends a specific DT (“don't care”) and an initial number of binary code to the first device of the interconnection configuration and the binary code is propagated through the devices. Each device performs a “+1” calculation regardless of the DT. The last device provides the memory controller with Nד+1” from which the memory controller can obtain the number N of devices in the interconnection configuration. Thereafter, the memory controller sends a search number (SN) of binary code and a search DT for DT matching that propagate through the devices. Each device performs DT match determination of “previous match”, “present match” and “don't care match”. Based on the match determination, the SN and search DT are or not modified. The modified or non-modified SN and DT are propagated through the devices. Such processes are repeated. From the propagated SN and DT and the previously recognized number of the devices, the memory controller can identify the DT of each device in the interconnection configuration.
摘要:
A plurality of memory devices of mixed type (e.g., DRAMs, SRAMs, MRAMs and NAND-, NOR- and AND-type Flash memories) are serially interconnected. Each device has device type information on its device type. A specific device type (DT) and a device identifier (ID) contained in a serial input (SI) are fed to one device of the serial interconnection. The device determines whether the fed DT matches the DT of the device. In a case of match, a calculator included in the device performs calculation to generate an ID for another device and the fed ID is latched in a register of the device. The generated ID is transferred to another device of the serial interconnection. In a case of no match, the ID generation is skipped and no ID is generated for another device. Such a device type match determination and ID generation or skip are performed in all devices of the serial interconnection. In cases of different device types being separately provided to the interconnected devices, sequential IDs are generated in each of the different device types and also the total number of each device type are recognized. In a case of a “don't care” code is provided to the interconnected devices, sequential IDs are generated and also, the total number of the interconnected devices is recognized, regardless of the type differences.
摘要:
A plurality of memory devices of mixed type (e.g., DRAMs, SRAMs, MRAMs, and NAND-, NOR- and AND-type Flash memories) are serially interconnected. Each device has device type information on its device type. A specific device type (DT) and a device identifier (ID) contained in a serial input (SI) as a packet are fed to one device of the serial interconnection. The device determines whether the fed DT matches the DT of the device. In a case of match, a calculator included in the device performs calculation to generate an ID for another device and the fed ID is latched in a register of the device. In a case of no-match, the ID generation is skipped and no ID is generated for another device. The DT is combined with the generated or the received ID depending on the device type match determination. The combined DT and ID is as a packet transferred to a next device. Such a device type match determination and ID generation or skip are performed in all devices of the serial interconnection. With reference to device type provided to the interconnected devices, IDs are sequentially generated. The SI containing the DT, the ID and an ID generation command is transmitted in a packet basis to a next device.
摘要:
A plurality of memory devices of mixed type (e.g., DRAMs, SRAMs, MRAMs, and NAND-, NOR- and AND-type Flash memories) is serially interconnected. Each device has device type information on its device type. A specific device type (DT) and a device identifier (ID) contained in a serial input (SI) as a packet are fed to one device of the serial interconnection. The device determines whether the fed DT matches the DT of the device. In a case of match, a calculator included in the device performs calculation to generate an ID accompanying the fed DT for another device and the fed ID is latched in a register of the device. In a case of no match, the ID generation is skipped and no ID is generated for another device. The DT is combined with the generated or the received ID depending on the device type match determination. The combined DT and ID is as a packet transferred to a next device. Such a device type match determination and ID generation or skip are performed in all devices of the serial interconnection. With reference to device type provided to the interconnected devices, IDs are sequentially generated. The SI containing the DT, the ID and an ID generation command is transmitted in a packet basis to a next device. A memory controller can recognize the total number of one DT, in response to the ID received from the last device. In a case of a “don't care” DT is provided to the interconnected devices, IDs are sequentially generated and the total number of the interconnected devices is recognized, regardless of the differences in DTs of the devices.
摘要:
A plurality of memory devices of mixed type (e.g., DRAMs, SRAMs, MRAMs and NAND-, NOR- and AND-type Flash memories) are serially interconnected. Each device has device type information on its device type. A specific device type (DT) and a device identifier (ID) contained in a serial input (SI) are fed to one device of the serial interconnection. The device determines whether the fed DT matches the DT of the device. In a case of match, a calculator included in the device performs calculation to generate an ID for another device and the fed ID is latched in a register of the device. The generated ID is transferred to another device of the serial interconnection. In a case of no match, the ID generation is skipped and no ID is generated for another device. Such a device type match determination and ID generation or skip are performed in all devices of the serial interconnection. In cases of different device types being separately provided to the interconnected devices, sequential IDs are generated in each of the different device types and also the total number of each device type are recognized. In a case of a “don't care” code is provided to the interconnected devices, sequential IDs are generated and also, the total number of the interconnected devices is recognized, regardless of the type differences.
摘要:
A method and apparatus for assigning a device identifier for a plurality of devices of mixed type (e.g., DRAMs, SRAMs, MRAMs, and NAND-, NOR- and AND-type Flash memories) in a serial interconnection configuration are disclosed. One device of the serial interconnection configuration receives a device identifier (ID) and a device type (DT) as a packet through its serial input connection. A first determination is performed as to whether the DT of the device contains pre-defined data corresponding to one including all device types to provide a first determination result; and a second determination of the DT of the device is performed in response to the received DT to provide a second determination result. An ID is produced and output to a next device in response to the first and second determination results. The received ID or the produced ID is assigned to the respective devices.