CTS后max_transition和max_capacitance违例
时间:10-02
整理:3721RD
点击:
RT
在做完CTS后,报告了下面的违例情况
max_transition
RequiredActual
NetTransitionTransitionSlack
-----------------------------------------------------------------
PCLK_G1B7I205 (dont_touch)
3.304.69-1.39(VIOLATED)
PIN :URA2SHD18BIT/CLKA
3.304.69-1.39(VIOLATED)
PIN :CLKBUFXL_G1B1I205/Y
3.303.39-0.09(VIOLATED)
PCLK_G1B7I144 (dont_touch)
3.303.36-0.06(VIOLATED)
PIN :URA2SHD6BIT/CLKA
3.303.36-0.06(VIOLATED)
PIN :CLKBUFXL_G1B1I144/Y
3.303.36-0.06(VIOLATED)
max_capacitance
RequiredActual
NetCapacitanceCapacitanceSlack
-----------------------------------------------------------------
PCLK_G1B7I144 (dont_touch)
0.160.28-0.12(VIOLATED)
PCLK_G1B7I205 (dont_touch)
0.160.28-0.12(VIOLATED)
请教各位大大,
PCLK_G1B7I205 和 PCLK_G1B7I144应该是插时钟树时加入的net,怎么会有dont touch属性呢?
这个违例该怎么优化处理呢?
在做完CTS后,报告了下面的违例情况
max_transition
RequiredActual
NetTransitionTransitionSlack
-----------------------------------------------------------------
PCLK_G1B7I205 (dont_touch)
3.304.69-1.39(VIOLATED)
PIN :URA2SHD18BIT/CLKA
3.304.69-1.39(VIOLATED)
PIN :CLKBUFXL_G1B1I205/Y
3.303.39-0.09(VIOLATED)
PCLK_G1B7I144 (dont_touch)
3.303.36-0.06(VIOLATED)
PIN :URA2SHD6BIT/CLKA
3.303.36-0.06(VIOLATED)
PIN :CLKBUFXL_G1B1I144/Y
3.303.36-0.06(VIOLATED)
max_capacitance
RequiredActual
NetCapacitanceCapacitanceSlack
-----------------------------------------------------------------
PCLK_G1B7I144 (dont_touch)
0.160.28-0.12(VIOLATED)
PCLK_G1B7I205 (dont_touch)
0.160.28-0.12(VIOLATED)
请教各位大大,
PCLK_G1B7I205 和 PCLK_G1B7I144应该是插时钟树时加入的net,怎么会有dont touch属性呢?
这个违例该怎么优化处理呢?
自己顶一下!
查cts是否正确完成,cts里面的max trans设定
自己顶一下!
你是不是在约束里面加了dont_touch?可能是你dc的约束中加了这个,但还是作用到cts的时候了,没有改清楚吧?
CTS为什么要用CLKBUFXL...
那要怎么改呢?