SYSTEM HAVING ONE OR MORE MEMORY DEVICES

摘要

A system having serially connected memory devices in a ring topology orga nization to realize high speed performance. The memory devices have dynamica lly configurable data widths such that the system can operate with up to a m aximum common number of active data pads to maximize performance, or to oper ate with a single active data pad to minimize power consumption. Therefore t he system can include a mix of memory devices having different data widths. The memory devices are dynamically configurable through the issuance of a si ngle command propagated serially through all the memory devices from the mem ory controller in a broadcast operation. Robust operation of the system is e nsured by implementing a data output inhibit algorithm, which prevents valid data from being provided to the memory controller when read output control signal is received out of its proper sequence.