<p>Embodiments of the invention include an IC that includes a core used for ordinary operation and a thin power circuit. The thin power circuit can be configured to use very little power. The IC can also include a digital interface and a connection thereto. The IC can initiate transition to low power mode during which the core and various I/O pads can be shut down. However, the thin power circuit can be kept powered up. The thin power circuit can monitor the digital interface for a predefined wake up signal. When the wake up signal is detected, the thin power circuit can power up the core and any powered down I/O pads. The thin power circuit can also include a dedicated power on reset (POR) cell. This POR cell can be distinct than other POR cells used for the IC and can be specifically designed to for efficient operation.</p>
申请公布号
WO2010030705(A1)
申请公布日期
2010.03.18
申请号
WO2009US56408
申请日期
2009.09.09
申请人
APPLE INC.;WILSON, THOMAS, JAMES;KRAH, CHRISTOPH, HORST;HOTELLING, STEVEN, PORTER