Memory system capable of increasing data transfer efficiency
AssigneeKabushiki Kaisha Toshiba
InventorAkihisa FUJIMOTO
Life of this patent
Estimating the term…
Abstract
According to one embodiment, a host controller includes a command generator and detector. The command generator generates a command having a retransmission flag in an argument, and transmits the generated command to a memory device. The detector detects timeout if a response from the memory device cannot be recognized within a defined time. When transmitting an initial command, the host controller clears the retransmission flag and transmits the command. If the detector detects timeout, the host controller sets the retransmission flag, and retransmits the same command as the initial command to the device. If a normal response corresponding to the initial command or retransmitted command is received, the host controller recognizes that the command is correctly executed.
Claims13
(canceled)
An apparatus to which commands to be transmitted to a device is set, comprising:
- a command generation unit configured to transmit the commands to the device;
- and
- a detector configured to detect timeout if a response from the device cannot be recognized within a defined time,
- wherein each of the commands has a retransmission flag in an argument, and the commands include a first command and a second command, and the second command has the same contents as the first command except for the retransmission flag, and
- wherein when the command generation unit resets the retransmission flag in the first command and transmits the first command to the device, if the detector detects timeout, the apparatus sets the retransmission flag and retransmits the second command to the device, and if a normal response corresponding to one of the first command and the second command is received, the host apparatus recognizes that an instruction instructed by the first command or the second command is correctly executed.
A system comprising:
- an apparatus configured to transmit commands to a device;
- and
- a device configured to receive the commands from the apparatus, if a received command is recognizable, the device returning a response to the apparatus within a defined time and executing the command, and if the command is unrecognizable, the device indicating that the command is not executed by returning no response, and if the command is recognizable but cannot be executed, the device returns an error response,
- wherein each of the commands has a retransmission flag in an argument, the commands include a first command and a second command, and the second command has the same contents as the first command except for the retransmission flag,
- the apparatus further comprises a detector which detects timeout if a response from the device cannot be recognized within the defined time, when transmitting the first command, the apparatus resets the retransmission flag in the first command, if the detector detects timeout, the apparatus sets the retransmission flag and transmits the second command as the first command to the device, and if a normal response is received, the apparatus recognizes that an instruction instructed by the first command or the second command is correctly executed, and if timeout corresponding to the second command is detected by the detector, the apparatus generates interrupt, indicating that both the first command and the second command cannot be executed.
Dependencies are inferred from the claim text.