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    • 26. 发明申请
    • Back-Off Timing Mechanism
    • 后退时机机制
    • US20090070507A1
    • 2009-03-12
    • US11853898
    • 2007-09-12
    • Shigehiro AsanoTsutomu Ishii
    • Shigehiro AsanoTsutomu Ishii
    • G06F13/00
    • G06F13/368
    • Systems and methods for implementing back-off timing for retries of commands sent from a master device to a slave device over a split-transaction bus. One embodiment includes a buffer having entries for storing each pending command and associated information, including a number of retries of the command and a static pseudorandom timer expiration value. The timer expiration value of each entry is compared to a running counter according to a mask associated with the number of retries of the command corresponding to the entry. When the unmasked bits of the two values match, the command is retried. In one embodiment, the same portion of the buffer entry that is used to store the number of retries and the timer expiration value is alternately used to store a slave-generated tag that is received with an acknowledgment response.
    • 用于通过分割事务总线实现从主设备发送到从设备的命令重试的退避时序的系统和方法。 一个实施例包括具有用于存储每个未决命令和相关信息的条目的缓冲器,包括命令的重试次数和静态伪随机定时器到期值。 根据与对应于条目的命令的重试次数相关联的掩码,将每个条目的定时器到期值与运行计数器进行比较。 当两个值的未屏蔽位匹配时,将重试该命令。 在一个实施例中,用于存储重试次数和定时器到期值的缓冲器条目的相同部分交替地用于存储用确认响应接收的从生产标签。