Patent ID: 7051217
Filing Date: 2006-05-23
Classification: G06F,G11C

Abstract:
1. A method of state maintenance for a MultiMediaCard (MMC) system using a plurality of signals, comprising: using a working voltage signal to represent a voltage level, which occasionally is less than a preset voltage level due to a voltage fluctuation; using a low voltage detection (LVD) signal to respond the voltage level of the working voltage signal, wherein the LVD signal is at a first state when the voltage level is greater than or equal to the preset voltage level, otherwise the LVD signal is at a second state; using an LVD interrupt signal to interrupt a data transferring or receiving, wherein when the LVD signal changes from the first state to the second state, the LVD interrupt signal is issued; and resetting the LVD interrupt signal, when the LVD signal changes from the second state to the first state, and the LVD interrupt signal is indeed polled by a firmware.