| 摘要 |
A PCI Express system and a method of transitioning link state thereof are provided. The PCI Express system has an upstream device, a downstream device and a link. The upstream device and the downstream device transmit data packets to both via the link, but when the link is in a first link state, data packet transmission is forbidden. In the beginning, the link is in a second link state and data packet transmission is normal. The upstream device transmits a data packet via the link to the downstream device. A time period is counted when receiving the data packet. The downstream device asserts an acknowledge packet to the upstream device to response the data pocket. After the timer is expired, the link is transited to the first link state.
|
