| 摘要 |
<p>An apparatus and method for providing a low power, flexible, completely digital wake-up timer. The wake-up timer is connected to a resistor and a capacitor network, thereby creating a time constant. The timer is comprised of two Schmitt-like trigger inverters, a flip-flop, and a pad driver. A wake-up pin of an associated device, for example, the handset unit of a cordless telephone, is connected to the inverters. The result from the inverters passes to a flip-flop which provides a delay. The pad driver drives a wake-up signal at the wake-up pin. A counter is included in the device to create an interrupt signal at a specific time.</p> |
