keys_test.tan.summary

4*8矩阵键盘的驱动程序。QuartusII5.0编译通过！

--------------------------------------------------------------------------------------
Timing Analyzer Summary
--------------------------------------------------------------------------------------

Type           : Worst-case tsu
Slack          : N/A
Required Time  : None
Actual Time    : 3.531 ns
From           : clr
To             : DEBOUNCING:\debounuing:U3|\debunce:d0
From Clock     : --
To Clock       : CLK_4M
Failed Paths   : 0

Type           : Worst-case tco
Slack          : N/A
Required Time  : None
Actual Time    : 18.898 ns
From           : \key_decoder:ZOUT[0]
To             : SEGOUT[3]
From Clock     : CLK_4M
To Clock       : --
Failed Paths   : 0

Type           : Worst-case th
Slack          : N/A
Required Time  : None
Actual Time    : 0.573 ns
From           : KEY[3]
To             : DEBOUNCING:\debounuing:U4|\debunce:d0
From Clock     : --
To Clock       : CLK_4M
Failed Paths   : 0

Type           : Clock Setup: 'CLK_4M'
Slack          : N/A
Required Time  : None
Actual Time    : 185.01 MHz ( period = 5.405 ns )
From           : DEBOUNCING:\debounuing:U1|dly
To             : \key_decoder:ZOUT[0]
From Clock     : CLK_4M
To Clock       : CLK_4M
Failed Paths   : 0

Type           : Clock Hold: 'CLK_4M'
Slack          : Not operational: Clock Skew > Data Delay
Required Time  : None
Actual Time    : N/A
From           : \counter:Q[4]
To             : \key_decoder:ZOUT[0]
From Clock     : CLK_4M
To Clock       : CLK_4M
Failed Paths   : 13

Type           : Total number of failed paths
Slack          : 
Required Time  : 
Actual Time    : 
From           : 
To             : 
From Clock     : 
To Clock       : 
Failed Paths   : 13

--------------------------------------------------------------------------------------