The read circuit feeds a read current from the first terminal to the second terminal at the reading operation time.

Notably, a split-readout operation is performed only during non-illumination.

Before the start of normal reading operation of a subject image, pre-reading operation of changing the image reading sensitivity at a plurality of stages for respective rows is executed.

In another aspect, the interface is adapted to perform a first read operation initiated by the host processor and a second read operation initiated by the external coprocessor.

A read latency of the first read operation exceeds a reply time period corresponding to the request.

Read/write operation is performed through one of the ports.

For scrubbing, an atomic read-correct-write operation is scheduled.

An apparatus comprises circuit for performing read before write operation which avoids unnecessary writes with an initial low power read operation.

A tag read operation and a tag write operation aimed at the same tag content information are implemented only through the read frequency and write frequency respectively.

For example, a data transfer rate for either a read data operation or a write data operation exceeds the transfer rate of the other operation.

In a third readout method a write operation is used to switch all regions, followed by a readout operation similar to either the first or second readout method.

In accordance with one aspect of the invention, the data cartridge library computer queries a player/recorder device after it has been involved in a read/write operation.

The data transfer, referred to as register read command/operation, resembles a read command/operation directed to data stored in the DRAM array in timing and operation.

A high-speed operation is performed with a read voltage above set and reset voltages, and after a read operation, the status prior to the read operation is rewritten.

The memory device is configured to perform at least a partial word write operation and a read operation, with the partial word write operation comprising a read phase and a write phase.