Unidirectional error code transfer for both read and write data transmitted via bidirectional data link

A memory device, comprising:

• a receiver to receive write data from a data bus, the write data from a remote device;
• a transmitter to send read data over the data bus to the remote device;
• and
• logic to dynamically generate error detection information for each of the write data and the read data and to cause transmission of the error detection information for each of write data and read data to the remote device.

A method of operating a memory device, comprising:

• generating read error detection information in connection with data read operations, and sending the read error detection information to a memory controller;
• generating write error detection information in connection with data write operations, and sending the write error detection information to the memory controller;
• and
• correcting an error by prompting a remedial retry action using error detection information sent to the memory controller, with error correction being performed substantially only at the memory controller.

A method of operating a device, comprising:

• receiving write mask information;
• receiving first error-detection information corresponding to at least a portion of the write mask information;
• dynamically generating second error-detection information for at least the portion of the write mask information;
• and
• detecting errors in at least the portion of the write mask information based on the first error-detection information and the second error-detection information, and, if an error is detected, disabling a write operation to a memory core.

A controller comprising:

• a transmitter circuit to transmit first data to a remote device;
• an encoder to dynamically generate first error-detection information for the first data;
• a receiver to receive from the remote device second error-detection information for the first data;
• the receiver to receive from the remote device second data and first error-detection information for the second data;
• the encoder to dynamically generate second error-detection information for the second data;
• error detection circuits to detect errors based on the received error-detection information from the remote device and the generated error-detection information at the controller for the first and second data.