stopwatch.tan.summary

读取4*4键盘的键值

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Timing Analyzer Summary
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Type           : Worst-case tsu
Slack          : N/A
Required Time  : None
Actual Time    : 11.300 ns
From           : reset
To             : act:u4|sel[2]

Type           : Worst-case tco
Slack          : N/A
Required Time  : None
Actual Time    : 22.900 ns
From           : act:u4|num[1]
To             : led[2]

Type           : Worst-case th
Slack          : N/A
Required Time  : None
Actual Time    : 2.500 ns
From           : set
To             : minute:u3|count[7]

Type           : Worst-case minimum tco
Slack          : N/A
Required Time  : None
Actual Time    : 12.600 ns
From           : act:u4|sel[5]
To             : selout[5]

Type           : Clock Setup: 'clk'
Slack          : N/A
Required Time  : None
Actual Time    : 55.25 MHz ( period = 18.100 ns )
From           : second:u2|count[0]
To             : second:u2|count[7]

Type           : Clock Setup: 'clk1'
Slack          : N/A
Required Time  : None
Actual Time    : 55.87 MHz ( period = 17.900 ns )
From           : act:u4|count[0]
To             : act:u4|num[2]

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