Check_timing报告主要显示一些时钟约束类的检查结果,以Vivado2022.1为例,检查项有以下12项 2.1 含义解释 no_clock:检查出没有时钟信号的寄存器 constant_clock:检查出连接到常量信号(如VSS、接地、数据信号)的时钟信号 pulse_width_clock:检查出只有脉冲宽度检查的时钟引脚,该时钟引脚没有setup/hold/recovery/removal...
Check_timing报告主要显示一些时钟约束类的检查结果,以Vivado2022.1为例,检查项有以下12项 2.1 含义解释 no_clock:检查出没有时钟信号的寄存器 constant_clock:检查出连接到常量信号(如VSS、接地、数据信号)的时钟信号 pulse_width_clock:检查出只有脉冲宽度检查的时钟引脚,该时钟引脚没有setup/hold/recovery/removal检查...
that report of no_clock checks (or should check) if there is a latch (no signal connected to clock port of register) or it is connected but without sdc command to define clock. Try "check_timing -include {no_clock}" without s 0 Kudos Copy link Reply Altera_Forum Honor...
1. Endpoint has no clock report_timing -to [endpoint] 看下timing path的终点是否有时钟 没有时钟,可以trance下 endpoint的时钟端路径,定位是否没有创建时钟,补充时钟定义 2. Startpoint has no clock 报告的路径是起点没挂上时钟,可以trance Startpoint 的时钟端是否有时钟定义 缺失时钟的原因多数是: 一、时...
create _ gated _ clock _ timing _ checkTypes, Data
gate结构的功能必须明确,如果是选择器或者异或逻辑等,STA就会输出一个警告:no clock gating check is being inferred. 这个警告可以通过 command set_clock_gating_check.来消除,但同时还要注意如果命令指定的功能与工具推出的不同,也会报出警告 3、clock gate 的timing如何检查?
69566 - UltraScale FPGAs Transceiver Wizard: check_timing reports unconstrained_internal_endpoints Description "check_timing" has reported unconstrained_internal_endpoints in GT logic.(Check Timing > unconstrained_internal_endpoints >Unconstrained Pins for Maximum delay due to constraint clock)The...
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跟clock pin 都会达到该cell 的同一个output, 即gating pin 跟 clock pin 都有到该cell 同一个output pin 的timing arc. 必须没有有效clock 传播到该pin 上。 Other: 目前大部分工具都不能自动推断出复杂cell 的clock gating check, 如MUX 或XOR. ...
The unexpandable_clocks section of the check timing report reports clock sets in which 1) The period is not expandable with respect to each other and2) there is at least 1 path between the clock sets. A clock set is unexpandable if no common multiples are found within 1000 cycles between...