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DC综合之后的时序报告,不知道如何修改 请各位大牛给点意见
Warning: Design 'cascade_top' contains 1 high-fanout nets. A fanout number of 1000 will be used for delay calculations involving these nets. (TIM-134)
Information: Updating design information... (UID-85)
Warning: Design 'cascade_top' contains 1 high-fanout nets. A fanout number of 1000 will be used for delay calculations involving these nets. (TIM-134)
****************************************
Report : timing
-path full
-delay max
-max_paths 1
Design : cascade_top
Version: E-2010.12
Date : Mon Jan 5 22:02:17 2015
****************************************
# A fanout number of 1000 was used for high fanout net computations.
Operating Conditions: ss_1v62_125c Library: ss_1v62_125c
Wire Load Model Mode: top
Startpoint: clk_enable (input port clocked by clk)
Endpoint: hcic_com/delay_pipeline_reg_0__49_
(rising edge-triggered flip-flop clocked by In_clk2)
Path Group: In_clk2
Path Type: max
Point Incr Path
--------------------------------------------------------------------------
clock clk (rise edge) 5850.00 5850.00
clock network delay (ideal) 3.00 5853.00
input external delay 0.01 5853.01 r
clk_enable (in) 0.00 5853.01 r
hcic_com/clk_enable (Hciccomp) 0.00 5853.01 r
hcic_com/U2006/Y (NAND2X3M) 0.07 5853.08 f
hcic_com/U3500/Y (CLKBUFX12M) 0.17 5853.26 f
hcic_com/U1455/Y (CLKBUFX20M) 0.17 5853.43 f
hcic_com/U275/Y (CLKBUFX24M) 0.18 5853.61 f
hcic_com/U1444/Y (CLKINVX16M) 0.07 5853.68 r
hcic_com/U2111/Y (NAND2X2M) 0.07 5853.75 f
hcic_com/U2105/Y (CLKBUFX4M) 0.17 5853.92 f
hcic_com/U5641/Y (INVX4M) 0.07 5854.00 r
hcic_com/U5643/Y (NAND2X2M) 0.06 5854.06 f
hcic_com/U2097/Y (CLKAND2X2M) 0.19 5854.26 f
hcic_com/U2093/Y (NAND2X2M) 0.08 5854.33 r
hcic_com/U5638/Y (AO22X2M) 0.18 5854.51 r
hcic_com/U67/Y (BUFX2M) 0.14 5854.66 r
hcic_com/U75/Y (CLKINVX3M) 0.07 5854.73 f
hcic_com/U77/Y (NAND2X2M) 0.08 5854.81 r
hcic_com/U74/Y (CLKNAND2X2M) 0.09 5854.90 f
hcic_com/U4731/Y (INVXLM) 0.07 5854.97 r
hcic_com/delay_pipeline_reg_0__49_/D (DFFRQX4M) 0.00 5854.97 r
data arrival time 5854.97
clock In_clk2 (rise edge) 6240.00 6240.00
clock network delay (ideal) 3.00 6243.00
clock uncertainty -0.50 6242.50
hcic_com/delay_pipeline_reg_0__49_/CK (DFFRQX4M) 0.00 6242.50 r
library setup time -0.24 6242.26
data required time 6242.26
--------------------------------------------------------------------------
data required time 6242.26
data arrival time -5854.97
--------------------------------------------------------------------------
slack (MET) 387.29
Startpoint: clk_enable (input port clocked by clk)
Endpoint: half_band/delay_pipeline_reg_56__43_
(rising edge-triggered flip-flop clocked by In_clk3)
Path Group: In_clk3
Path Type: max
Point Incr Path
--------------------------------------------------------------------------
clock clk (rise edge) 12090.00 12090.00
clock network delay (ideal) 3.00 12093.00
input external delay 0.01 12093.01 r
clk_enable (in) 0.00 12093.01 r
half_band/clk_enable (Hhb) 0.00 12093.01 r
half_band/U2989/Y (AND2X12M) 0.15 12093.16 r
half_band/U17072/Y (BUFX4M) 0.14 12093.30 r
half_band/U6653/Y (CLKBUFX24M) 0.17 12093.47 r
half_band/U4566/Y (INVX16M) 0.06 12093.52 f
half_band/U1549/Y (CLKBUFX20M) 0.15 12093.68 f
half_band/U2541/Y (INVX14M) 0.07 12093.75 r
half_band/U1948/Y (CLKBUFX32M) 0.16 12093.92 r
half_band/U1069/Y (INVX10M) 0.05 12093.97 f
half_band/U32243/Y (OR2X2M) 0.18 12094.15 f
half_band/U15087/Y (INVX2M) 0.07 12094.22 r
half_band/U34069/Y (INVX2M) 0.05 12094.27 f
half_band/U9643/Y (BUFX6M) 0.15 12094.42 f
half_band/U2770/Y (CLKBUFX40M) 0.16 12094.58 f
half_band/U31158/Y (OR2X4M) 0.19 12094.77 f
half_band/U9178/Y (BUFX8M) 0.15 12094.92 f
half_band/U26660/Y (OA22X2M) 0.26 12095.18 f
half_band/U26661/Y (INVXLM) 0.08 12095.26 r
half_band/U10947/Y (BUFX2M) 0.13 12095.39 r
half_band/U18607/Y (AO22X2M) 0.18 12095.57 r
half_band/U444/Y (BUFX2M) 0.14 12095.71 r
half_band/U641/Y (CLKINVX3M) 0.07 12095.79 f
half_band/U644/Y (NAND2X2M) 0.08 12095.87 r
half_band/U640/Y (NAND2X2M) 0.07 12095.94 f
half_band/U21315/Y (INVXLM) 0.08 12096.02 r
half_band/delay_pipeline_reg_56__43_/D (DFFRHQX1M) 0.00 12096.02 r
data arrival time 12096.02
clock In_clk3 (rise edge) 12480.00 12480.00
clock network delay (ideal) 3.00 12483.00
clock uncertainty -0.50 12482.50
half_band/delay_pipeline_reg_56__43_/CK (DFFRHQX1M) 0.00 12482.50 r
library setup time -0.20 12482.30
data required time 12482.30
--------------------------------------------------------------------------
data required time 12482.30
data arrival time -12096.02
--------------------------------------------------------------------------
slack (MET) 386.28
Startpoint: U1/count_3_reg_4_
(rising edge-triggered flip-flop clocked by clk)
Endpoint: U1/count_3_reg_2_
(rising edge-triggered flip-flop clocked by clk)
Path Group: clk
Path Type: max
Point Incr Path
-----------------------------------------------------------
clock clk (rise edge) 0.00 0.00
clock network delay (ideal) 3.00 3.00
U1/count_3_reg_4_/CK (DFFRHQX8M) 0.00 3.00 r
U1/count_3_reg_4_/Q (DFFRHQX8M) 0.28 3.28 f
U1/U50/Y (CLKBUFX32M) 302.83 # 306.12 f
U1/U73/Y (OAI2B1X1M) 0.24 # 306.36 f
U1/U31/Y (DLY1X1M) 0.34 306.70 f
U1/U39/Y (INVXLM) 0.08 306.78 r
U1/U30/Y (BUFX2M) 0.14 306.92 r
U1/U37/Y (BUFX2M) 0.14 307.06 r
U1/U52/Y (NAND2X2M) 0.07 307.13 f
U1/U36/Y (CLKNAND2X2M) 0.06 307.19 r
U1/U44/Y (AND2X2M) 0.15 307.34 r
U1/count_3_reg_2_/D (DFFRQX2M) 0.00 307.34 r
data arrival time 307.34
clock clk (rise edge) 390.00 390.00
clock network delay (ideal) 3.00 393.00
clock uncertainty -0.50 392.50
U1/count_3_reg_2_/CK (DFFRQX2M) 0.00 392.50 r
library setup time -0.25 392.25
data required time 392.25
-----------------------------------------------------------
data required time 392.25
data arrival time -307.34
-----------------------------------------------------------
slack (MET) 84.91
1
****************************************
Report : timing
-path full
-delay min
-max_paths 1
Design : cascade_top
Version: E-2010.12
Date : Mon Jan 5 22:08:13 2015
****************************************
# A fanout number of 1000 was used for high fanout net computations.
Operating Conditions: ff_1v98_m40c Library: ff_1v98_m40c
Wire Load Model Mode: top
Startpoint: clk_enable (input port clocked by clk)
Endpoint: hcic_com/IN_PROCESS_cur_count_reg_0_
(rising edge-triggered flip-flop clocked by In_clk2)
Path Group: In_clk2
Path Type: min
Point Incr Path
--------------------------------------------------------------------------
clock clk (rise edge) 6240.00 6240.00
clock network delay (ideal) 3.00 6243.00
input external delay 0.01 6243.01 r
clk_enable (in) 0.00 6243.01 r
hcic_com/clk_enable (Hciccomp) 0.00 6243.01 r
hcic_com/U106/Y (OA21X2M) 0.07 6243.08 r
hcic_com/U107/Y (INVXLM) 0.02 6243.10 f
hcic_com/IN_PROCESS_cur_count_reg_0_/D (DFFRQX2M) 0.00 6243.10 f
data arrival time 6243.10
clock In_clk2 (rise edge) 6240.00 6240.00
clock network delay (ideal) 3.00 6243.00
clock uncertainty 0.50 6243.50
hcic_com/IN_PROCESS_cur_count_reg_0_/CK (DFFRQX2M) 0.00 6243.50 r
library hold time 0.02 6243.52
data required time 6243.52
--------------------------------------------------------------------------
data required time 6243.52
data arrival time -6243.10
--------------------------------------------------------------------------
slack (VIOLATED) -0.42
Startpoint: clk_enable (input port clocked by clk)
Endpoint: half_band/IN_PROCESS_cur_count_reg_0_
(rising edge-triggered flip-flop clocked by In_clk3)
Path Group: In_clk3
Path Type: min
Point Incr Path
--------------------------------------------------------------------------
clock clk (rise edge) 12480.00 12480.00
clock network delay (ideal) 3.00 12483.00
input external delay 0.01 12483.01 f
clk_enable (in) 0.00 12483.01 f
half_band/clk_enable (Hhb) 0.00 12483.01 f
half_band/U21206/Y (OA21X2M) 0.12 12483.12 f
half_band/IN_PROCESS_cur_count_reg_0_/D (DFFSX4M) 0.00 12483.12 f
data arrival time 12483.12
clock In_clk3 (rise edge) 12480.00 12480.00
clock network delay (ideal) 3.00 12483.00
clock uncertainty 0.50 12483.50
half_band/IN_PROCESS_cur_count_reg_0_/CK (DFFSX4M) 0.00 12483.50 r
library hold time 0.02 12483.52
data required time 12483.52
--------------------------------------------------------------------------
data required time 12483.52
data arrival time -12483.12
--------------------------------------------------------------------------
slack (VIOLATED) -0.39
Startpoint: clk_enable (input port clocked by clk)
Endpoint: cic_filter_delay0_reg_1__6_
(rising edge-triggered flip-flop clocked by clk)
Path Group: clk
Path Type: min
Point Incr Path
--------------------------------------------------------------------------
clock clk (rise edge) 0.00 0.00
clock network delay (ideal) 3.00 3.00
input external delay 0.01 3.01 f
clk_enable (in) 0.00 3.01 f
U886/Y (NAND2X6M) 0.03 3.04 r
U2896/Y (OAI2BB1X2M) 0.02 3.06 f
cic_filter_delay0_reg_1__6_/D (DFFRQX4M) 0.00 3.06 f
data arrival time 3.06
clock clk (rise edge) 0.00 0.00
clock network delay (ideal) 3.00 3.00
clock uncertainty 0.50 3.50
cic_filter_delay0_reg_1__6_/CK (DFFRQX4M) 0.00 3.50 r
library hold time 0.02 3.52
data required time 3.52
--------------------------------------------------------------------------
data required time 3.52
data arrival time -3.06
--------------------------------------------------------------------------
slack (VIOLATED) -0.46 |
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