Abstract: An electronic device may include a PPG sensor including a light emitter that applies a current in a specified range and emits a light signal corresponding to the current and a light detector that amplifies a received light signal by applying one of a plurality of gain values, a memory that stores a plurality of sets of PPG models corresponding to the plurality of gain values and including a current value and PPG level data corresponding to the current value, and at least one processor electrically connected to the PPG sensor and the memory.

Abstract: An example electronic device includes at least one sensor including a grip sensor, at least one antenna, a radio frequency (RF) circuit including at least one antenna tuning circuit connected to the at least one antenna, and at least one communication processor operatively connected to the RF circuit.

Abstract: A method of operating a storage device that includes a nonvolatile memory device and a controller that controls operation of the nonvolatile memory device includes issuing, by the controller, a first command to the nonvolatile memory device, reading, by the nonvolatile memory device, first data from a memory cell array into a page buffer of the nonvolatile memory device, in response to the first command, issuing, by the controller, a second command to the nonvolatile memory device, and outputting, by the nonvolatile memory device to the controller, in response to the second command, status information indicating whether a read operation according to the first command has been completed and second data obtained from the page buffer of the nonvolatile memory device.

Abstract: A computing device includes a main memory, a processor, and a cache. The main memory stores data and parity, for checking an error of the data, and sends and receives the data and parity with a reference size. The processor accesses the main memory, and the cache memory caches the data. If the processor requests a write operation for current data, the current data are stored to the cache memory and the cache memory changes the stored current data to the reference size and outputs the current data changed to the reference size to the main memory. A size of the current data is smaller than the reference size.

Abstract: A computing device includes a main memory, a processor, and a cache. The main memory stores data and parity, for checking an error of the data, and sends and receives the data and parity with a reference size. The processor accesses the main memory, and the cache memory caches the data. If the processor requests a write operation for current data, the current data are stored to the cache memory and the cache memory changes the stored current data to the reference size and outputs the current data changed to the reference size to the main memory. A size of the current data is smaller than the reference size.

Abstract: A method of storing data in a storage media is provided which includes sequentially compressing data by a compression unit, and storing the compressed data in the storage media, the compression unit being varied according to a compression characteristic of data to be stored in the storage media.