Read latency reduction through command and polling overhead avoidance

Abstract

Aspects of a storage device including a memory and a controller are provided which allow for reduction of latency and improve QoS for reads performed in memory locations such as multi-plane dies sharing a bus with the controller. When the controller receives a host read command, the controller sends a read sense command to a memory location to perform a read operation. The controller also sends a status polling command to the memory location to check die status. While the read operation is being performed, and while other read operations are being performed in other memory locations, the controller refrains from polling this memory location and the other memory locations for die status. Rather, the controller continuously toggles a read enable input to the memory location until the read operation is complete and the die status is ready, after which the controller receives data from the memory location.