延迟只能添加到FPGA输入端口。
定义了2个约束。
1.IBUF_DELAY_VALUE - 可应用于不直接驱动a的任何输入或双向信号
时钟或IOB(输入输出块)寄存器。
值为0到16。
这些值不直接与时间单位相关,而是与额外的缓冲延迟相关。
数据表中提到了这种缓冲延迟。
例如:NET“top_level_port_name”IBUF_DELAY_VALUE = value;
2.IFD_DELAY_VALUE - 可应用于驱动IOB的任何输入或双向信号(输入
值为0到8.这些值与时间单位不直接相关,而是与额外的缓冲延迟直接相关。
数据表中提到了这种缓冲延迟。
输出块)寄存器。
例如:NET“
希望这可以帮助你......
top_level_port_name“IFD_DELAY_VALUE = value;
以上来自于谷歌翻译
以下为原文
Delay can be added only to FPGA input ports.
There are 2 constraints defined.
1.
IBUF_DELAY_VALUE - Can be applied to any input or bi-directional signal that is not directly driving a
clock or IOB (Input Output Block) register.
Value is 0 to16. These values do not directly correlate to a unit of time but rather additional buffer delay. This buffer delay is mentioned in datasheets.
Ex:
NET "
top_level_port_name" IBUF_DELAY_VALUE = value;
2.
IFD_DELAY_VALUE - Can be applied to any input or bi-directional signal which drives an IOB (Input
Value is 0 to 8. These values do not directly correlate to a unit of time but rather additional buffer delay. This buffer delay is mentioned in datasheets.
Output Block) register.
Ex: NET "
Hope this helps you...
top_level_port_name" IFD_DELAY_VALUE = value;
延迟只能添加到FPGA输入端口。
定义了2个约束。
1.IBUF_DELAY_VALUE - 可应用于不直接驱动a的任何输入或双向信号
时钟或IOB(输入输出块)寄存器。
值为0到16。
这些值不直接与时间单位相关,而是与额外的缓冲延迟相关。
数据表中提到了这种缓冲延迟。
例如:NET“top_level_port_name”IBUF_DELAY_VALUE = value;
2.IFD_DELAY_VALUE - 可应用于驱动IOB的任何输入或双向信号(输入
值为0到8.这些值与时间单位不直接相关,而是与额外的缓冲延迟直接相关。
数据表中提到了这种缓冲延迟。
输出块)寄存器。
例如:NET“
希望这可以帮助你......
top_level_port_name“IFD_DELAY_VALUE = value;
以上来自于谷歌翻译
以下为原文
Delay can be added only to FPGA input ports.
There are 2 constraints defined.
1.
IBUF_DELAY_VALUE - Can be applied to any input or bi-directional signal that is not directly driving a
clock or IOB (Input Output Block) register.
Value is 0 to16. These values do not directly correlate to a unit of time but rather additional buffer delay. This buffer delay is mentioned in datasheets.
Ex:
NET "
top_level_port_name" IBUF_DELAY_VALUE = value;
2.
IFD_DELAY_VALUE - Can be applied to any input or bi-directional signal which drives an IOB (Input
Value is 0 to 8. These values do not directly correlate to a unit of time but rather additional buffer delay. This buffer delay is mentioned in datasheets.
Output Block) register.
Ex: NET "
Hope this helps you...
top_level_port_name" IFD_DELAY_VALUE = value;
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