usbf_mem_arb.tan.summary

USB的 这次 我这只有两个可以上载 谁能告诉我怎么办

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Timing Analyzer Summary
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Type           : Worst-case tsu
Slack          : N/A
Required Time  : None
Actual Time    : 4.323 ns
From           : mreq
To             : wack_r
From Clock     : --
To Clock       : phy_clk
Failed Paths   : 0

Type           : Worst-case tco
Slack          : N/A
Required Time  : None
Actual Time    : 12.748 ns
From           : wack_r
To             : sram_dout[4]
From Clock     : phy_clk
To Clock       : --
Failed Paths   : 0

Type           : Worst-case tpd
Slack          : N/A
Required Time  : None
Actual Time    : 16.599 ns
From           : wreq
To             : sram_dout[4]
From Clock     : --
To Clock       : --
Failed Paths   : 0

Type           : Worst-case th
Slack          : N/A
Required Time  : None
Actual Time    : -4.019 ns
From           : wreq
To             : wack_r
From Clock     : --
To Clock       : phy_clk
Failed Paths   : 0

Type           : Clock Setup: 'phy_clk'
Slack          : N/A
Required Time  : None
Actual Time    : Restricted to 450.05 MHz ( period = 2.222 ns )
From           : wack_r
To             : wack_r
From Clock     : phy_clk
To Clock       : phy_clk
Failed Paths   : 0

Type           : Total number of failed paths
Slack          : 
Required Time  : 
Actual Time    : 
From           : 
To             : 
From Clock     : 
To Clock       : 
Failed Paths   : 0

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