T. 2007 Reproductive skew and the evolution of group dissolution tactics: a synthesis of concession and restraint models. Anim. Behav. 74, 1643-1654. (doi:10.1016/j.anbehav.2007.03.003)Buston PM, Reeve HK, Cant MA, Vehrencamp SL, Emlen ST (2007) Reproductive skew and the evolution of ...
检查Clock Skew是否小于0.5ns CLOCK_DELAY_GROUP可有效改善同步跨时钟域路径的Clock Skew,因此,Xilinx建议对于关键的同步跨时钟域路径,可通过设置该属性降低Clock Skew,即使发送时钟和接收时钟具有相同的CLOCK_ROOT值。CLOCK_DELAY_GROUP的具体使用方法如下图所示,其中clk1_net和clk2_net是Clock Buffer的输出端连接的net。
检查Clock Skew是否小于0.5ns CLOCK_DELAY_GROUP可有效改善同步跨时钟域路径的Clock Skew,因此,Xilinx建议对于关键的同步跨时钟域路径,可通过设置该属性降低Clock Skew,即使发送时钟和接收时钟具有相同的CLOCK_ROOT值。CLOCK_DELAY_GROUP的具体使用方法如下图所示,其中clk1_net和clk2_net是Clock Buffer的输出端连接的net。
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set_clock_groups -asynchronous -group [get_clocks {spi_clk spi_virt_clk}] Then i created the net delay and max skew constraints # Set net delay between spiclk to sys clk data crossings set_net_delay -from [get_registers {*spi*shift_reg[*]*}] -to [get_registers {*spi*...
在时序报告中,可以针对两类特殊的约束专门进行报告,一类是前面介绍过的Report Exception,包含了约束set_multicycle_path/set_false_path/set_max_dealy/set_min_delay。另一类就是本文要介绍的set_bus_skew约束,对应的分析为Report Bus Skew,该报告不包含在Report Timing Summary中。
set_clock_groups -asynchronous -group [get_clocks {spi_clk spi_virt_clk}] Then i created the net delay and max skew constraints # Set net delay between spiclk to sys clk data crossings set_net_delay -from [get_registers {*spi*shift_reg[*]*}] -to [get_registers {*spi*rx_...
在时序报告中,可以针对两类特殊的约束专门进行报告,一类是前面介绍过的Report Exception,包含了约束set_multicycle_path/set_false_path/set_max_dealy/set_min_delay。另一类就是本文要介绍的set_bus_skew约束,对应的分析为Report Bus Skew,该报告不包含在Report Timing Summary中。
set_clock_groups -asynchronous -group [get_clocks {spi_clk spi_virt_clk}] set_max_skew -from [get_registers {*spi*shift_reg[*]*}] -to [get_registers {*spi*rx_data_reg[*]*}] -get_skew_value_from_clock_period min_clock_period -skew_value_multiplier 0.8 Translate 0...
The skew generalized power series ring$[[R^{S,\\leq},\\omega]]$ is a common generalization of (skew) polynomial rings,(skew) power series rings, (skew) Laurent polynomial rings, (skew) group rings,and Malcev-Neumann Laurent series rings. We study the left APP-property of theskew ...