为了能耗,大多数SOC 芯片都会切分成多个电压域,而丰富的接口就意味着庞杂的clock 和reset. 信号跨越不同domain 时都需要特别处理,比如跨power domain 时需要插入isolation 或level shifter 或 ELS, 对power domain 的处理,需要理清power domain 的关系,定义清楚power intent, 在设计、验证、实现端都需要做额外处理;相...
4)clock domain时钟域 1.Then the problem of how to transmit and exchange data across differentclock domains is explored; the three methods that use flip-flop, phase-detector or FIFO to solve the above problem are put forward; and a 15-1 MUX instance which is designed by VHDL language in ...
Sadly, we’re not trying to cross a 1-bit signal from oneclock domainto another, but rather anNbit (i.e.AW-bit) signal from oneclock domainto the next–whetherwbinto the read clock side orrbinto the write clock side. If we put the whole word into a synchronizer, like the one shown...
Clock Domain Crossing (CDC) issues constitute a complex and widely spread verification problem for the majority of modern designs, regardless of the application type or implementation technology. The number of independent interacting clocks, and their associated mistakes, in designs is continuously growing...
Debugging CDC and RDC issues is being achieved via rich schematic and cross-probing mechanisms, as well as comprehensive reports and TCL-based API, which allows browsing through synthesis results, clocks and resets structures, detected clock and reset domain crossings, and identified synchronizers. ...
1) Do I have to use a flip flop (as shown) to transmit the peripheral reset signal from the FCLK_CLK0 domain to the CLK125 domain? I'm doing this because I read the following in PG059: Each of the SI, MI and Crossbar aclk is accompanied by an aresetn in...
I checked it out, it's all cross clock domain signals.. so question: how do I effectively pass my toggle switch signal? I found something in "The Ten Commandments of Excellent Design-VHDL Code Examples"..but don't quite understand how to do it...any suggestion/adv...
A flag to another clock domain If the signal that needs to cross the clock domains is just a pulse (i.e. it lasts just one clock cycle), we call it a "flag". The previous design usually doesn't work (the flag might be missed, or be seen for too long, depending on the ratio ...
(e.g. CLK1, CLK2, CLK3) and multiple paths that cross different clock domains (e.g. the CLK1clock domain1510, the CLK2clock domain1520, and the CLK3clock domain1530). In many such situations like the multi-domain circuit1500, special circuit structures have been used in the prior ...
Methods and apparatus are provided for allowing efficient clock domain crossing management in programmable chip systems. Components associated with different clock domains can be an