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公开(公告)号：US4811364A
公开(公告)日：1989-03-07
申请号：US176570
申请日：1988-04-01
IPC分类号： G06F13/42 , G06F1/10 , H04L7/00 , H04L7/02 , H04L7/033 , H04L7/04 , H04L25/02 , H04L25/14 , G06F11/00
CPC分类号： H04L7/0008 , G06F1/10 , H04L25/14 , H04L7/02 , H04L7/0338
摘要： Data can be accurately transmitted between two subsystems even if the clock skew between the two subsystems is larger than one clock cycle by the method of the invention. In one embodiment data is loaded into N state devices in the sending subsystem while the receiver recovers data from the sending state devices in rotation with an N input multiplexer. Another embodiment forwards a clock signal from the sending subsystem along with a data vector of N state signals for recovery by a pair of state devices capturing data on the rising and falling edges of the forwarded clock. A further embodiment achieves double bandwidth by forwarding two clock signals.
摘要翻译： 即使通过本发明的方法两个子系统之间的时钟偏差大于一个时钟周期，也可以在两个子系统之间精确地传输数据。 在一个实施例中，数据被加载到发送子系统中的N个状态设备中，同时接收机利用N输入多路复用器从发送状态设备中旋转数据。 另一实施例将来自发送子系统的时钟信号与N个状态信号的数据向量一起转发，以便通过在转发的时钟的上升沿和下降沿捕获数据的一对状态设备进行恢复。 另一实施例通过转发两个时钟信号实现双倍带宽。
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公开(公告)号：US5115455A
公开(公告)日：1992-05-19
申请号：US546400
申请日：1990-06-29
CPC分类号： H04L7/0338 , G06F1/10 , H04L7/0008 , H04L7/0037 , H04L7/0041
摘要： Data can be accurately transmitted between two subsystems in a synchronous system even if the clock skew or propagation delay between the two subsystems is greater than one clock cycle time. The source and destination subsystems are initialized to ensure synchronous operation. The source subsystem transmits data and a forwarded clock to the destination subsystem. The forwarded clock is passed through a delay device to introduce a one-half cycle delay into the forwarded clock timing. Data is captured in three state devices arranged in parallel to eliminate minimum delay requirements and to expand data valid time. The captured data is then aligned to the destination subsystem's clock by controlling a multiplexer which selects the proper signal at its input to pass to the input of a second state device coupled to its output. The data selected is then clocked into the second state device under the control of the distination subsystem's clock, thus aligning the received data with the destination subsystem's clock.
摘要翻译： 即使两个子系统之间的时钟偏差或传播延迟大于一个时钟周期时间，数据也可以在同步系统中的两个子系统之间精确传输。 源和目标子系统被初始化以确保同步操作。 源子系统将数据和转发的时钟传送到目标子系统。 转发的时钟通过延迟器件，将半个周期的延迟引入转发的时钟时序。 在并行布置的三个状态设备中捕获数据，以消除最小延迟要求并扩展数据有效时间。 捕获的数据然后通过控制多路复用器对准目的地子系统的时钟，多路复用器在其输入端选择合适的信号，以传递到耦合到其输出的第二状态设备的输入。 然后，所选择的数据在distination子系统的时钟的控制下被计时到第二状态设备，从而使接收到的数据与目的地子系统的时钟对齐。
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公开(公告)号：US4979190A
公开(公告)日：1990-12-18
申请号：US303846
申请日：1989-01-30
CPC分类号： G06F1/10 , H04L25/14 , H04L7/0008 , H04L7/02 , H04L7/0338
摘要： Data can be accurately transmitted between two subsystems even if the clock skew between the two subsystems is larger than one clock cycle by the method of the invention. In one embodiment data is loaded into N state devices in the sending subsystem while the receiver recovers data from the sending state devices in rotation with an N input multiplexer. Another embodiment forwards a clock signal from the sending subsystem along with a data vector of N state signals for recovery by a pair of state devices capturing data on the rising and falling edges of the forwarded clock. A further embodiment achieves double bandwidth by forwarding two clock signals.
摘要翻译： 即使通过本发明的方法两个子系统之间的时钟偏差大于一个时钟周期，也可以在两个子系统之间精确地传输数据。 在一个实施例中，数据被加载到发送子系统中的N个状态设备中，同时接收机利用N输入多路复用器从发送状态设备中旋转数据。 另一实施例将来自发送子系统的时钟信号与N个状态信号的数据向量一起转发，以便通过在转发的时钟的上升沿和下降沿捕获数据的一对状态设备进行恢复。 另一实施例通过转发两个时钟信号实现双倍带宽。
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