Abstract: A file updating method applied in an electronic system for updating data is provided. In step a, an available second physical sector is obtained and mapped to an update logical sector in the data region. In step b, the update data corresponding to the update logical sector is written into the second physical sector. In step c, the steps a and b are repeated until the update data corresponding to all of the update logical sectors in the data region has been written into the mapped/corresponding second physical sectors thereof. In step d, the status of at leas one of the second physical sectors mapped to the update logical sectors is set to be “BEINGVALIDATED”.

Abstract: An automatic gain control method used in a wireless receiver is disclosed. The method comprise the following steps: Receiving a first frame, amplifying a RF signal corresponding to the first frame with a gain value and down converting the RF signal to generate a baseband signal. Updating the gain value according to the power level of the baseband signal corresponding to the first frame, then using the updated gain value to amplify the RF signal corresponding to a second frame when receiving the second frame. Determining whether a first signal block is in the discontinuous transmission mode or not, wherein the first frame belongs to the first signal block. And resuming the gain value according to the power level of the baseband signal corresponding to a third frame if the first signal block is in the discontinuous transmission mode.

Abstract: This invention provides a method for managing digital data and the digital data allocation in a memory, which is applied to a digital recording device. The memory can repetitively write and crase and comprises a plurality of sectors in which a plurality of digital data files can be written. The least unit to crase the digital data in the memory every time is one sector. Each sector divides to a plurality of blocks, and each block is arranged a block header. The block header can record the current status of the corresponding block. The method comprises a step to set up a block reclamation starting condition. When some blocks in a target sector have to be erased, the digital data of the other blocks which need not to be erased will be moved and stored in the blocks of other sectors.