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I have two inputs (TMDS_DATA and TMDS2_RX_DATA) When I directly pass to the output the input everything works without any problems. But if I insert scaler between then the register at one input is not implemented in ddio. At the same time, the second entrance fitted correctly
TimeQuest report path
Report Path: Found 6 paths. Longest delay is 6.720
-from [get_keepers {TMDS*_DATA[*]}]
-to [get_registers {*dd_*}]
-npaths 10
-multi_corner
-stdout
Path #1: Delay is 6.720
===================================================================
From Node : TMDS_DATA[1]
To Node : TMDS_Receiver:TMDSReceiver_inst0|dd_green
Path:
Total (ns) Incr (ns) Type Element
========== ========= == ==== ===================================
0.000 0.000 TMDS_DATA[1]
0.000 0.000 FF IC TMDS_DATA[1]~input|i
0.970 0.970 FF CELL TMDS_DATA[1]~input|o
6.153 5.183 FF IC TMDSReceiver_inst0|dd_green|asdata
6.720 0.567 FF CELL TMDS_Receiver:TMDSReceiver_inst0|dd_green
Total Path Delay : 6.720
===================================================================
Path #2: Delay is 2.323
===================================================================
From Node : TMDS_DATA[2]
To Node : TMDS_Receiver:TMDSReceiver_inst0|dd_red
Path:
Total (ns) Incr (ns) Type Element
========== ========= == ==== ===================================
0.000 0.000 TMDS_DATA[2]
0.000 0.000 FF IC TMDS_DATA[2]~input|i
1.016 1.016 FF CELL TMDS_DATA[2]~input|o
1.016 0.000 FF IC TMDSReceiver_inst0|dd_red|d
2.323 1.307 FF CELL TMDS_Receiver:TMDSReceiver_inst0|dd_red
Total Path Delay : 2.323
===================================================================
Path #3: Delay is 2.233
===================================================================
From Node : TMDS2_RX_DATA[0]
To Node : TMDS_Receiver:TMDSReceiver_inst1|dd_blue
Path:
Total (ns) Incr (ns) Type Element
========== ========= == ==== ===================================
0.000 0.000 TMDS2_RX_DATA[0]
0.000 0.000 FF IC TMDS2_RX_DATA[0]~input|i
0.940 0.940 FF CELL TMDS2_RX_DATA[0]~input|o
0.940 0.000 FF IC TMDSReceiver_inst1|dd_blue|d
2.233 1.293 FF CELL TMDS_Receiver:TMDSReceiver_inst1|dd_blue
Total Path Delay : 2.233
===================================================================
Path #4: Delay is 2.233
===================================================================
From Node : TMDS_DATA[0]
To Node : TMDS_Receiver:TMDSReceiver_inst0|dd_blue
Path:
Total (ns) Incr (ns) Type Element
========== ========= == ==== ===================================
0.000 0.000 TMDS_DATA[0]
0.000 0.000 FF IC TMDS_DATA[0]~input|i
0.940 0.940 FF CELL TMDS_DATA[0]~input|o
0.940 0.000 FF IC TMDSReceiver_inst0|dd_blue|d
2.233 1.293 FF CELL TMDS_Receiver:TMDSReceiver_inst0|dd_blue
Total Path Delay : 2.233
===================================================================
Path #5: Delay is 2.223
===================================================================
From Node : TMDS2_RX_DATA[2]
To Node : TMDS_Receiver:TMDSReceiver_inst1|dd_red
Path:
Total (ns) Incr (ns) Type Element
========== ========= == ==== ===================================
0.000 0.000 TMDS2_RX_DATA[2]
0.000 0.000 FF IC TMDS2_RX_DATA[2]~input|i
0.930 0.930 FF CELL TMDS2_RX_DATA[2]~input|o
0.930 0.000 FF IC TMDSReceiver_inst1|dd_red|d
2.223 1.293 FF CELL TMDS_Receiver:TMDSReceiver_inst1|dd_red
Total Path Delay : 2.223
===================================================================
Path #6: Delay is 2.198
===================================================================
From Node : TMDS2_RX_DATA[1]
To Node : TMDS_Receiver:TMDSReceiver_inst1|dd_green
Path:
Total (ns) Incr (ns) Type Element
========== ========= == ==== ===================================
0.000 0.000 TMDS2_RX_DATA[1]
0.000 0.000 FF IC TMDS2_RX_DATA[1]~input|i
0.905 0.905 FF CELL TMDS2_RX_DATA[1]~input|o
0.905 0.000 FF IC TMDSReceiver_inst1|dd_green|d
2.198 1.293 FF CELL TMDS_Receiver:TMDSReceiver_inst1|dd_green
Total Path Delay : 2.198
===================================================================
I added the following to QSF:
set_instance_assignment -name FAST_INPUT_REGISTER ON -to "TMDS_Receiver:TMDSReceiver_inst0|dd_green"
set_instance_assignment -name FAST_INPUT_REGISTER ON -to "TMDS_Receiver:TMDSReceiver_inst0|dd_red"
set_instance_assignment -name FAST_INPUT_REGISTER ON -to "TMDS_Receiver:TMDSReceiver_inst0|dd_blue"
But:
Warning (176225): Can't pack node TMDS_Receiver:TMDSReceiver_inst0|dd_green to I/O pin
Warning (176229): Can't pack node TMDS_Receiver:TMDSReceiver_inst0|dd_green and I/O node TMDS_DATA[1] -- nodes have conflicting location assignments
Info (176253): Node "TMDS_Receiver:TMDSReceiver_inst0|dd_green" assigned to CUSTOM_REGION_X0_Y0_X44_Y36 due to Automatic Periphery Placement
Info (176253): Node "TMDS_DATA[1]" assigned to PIN AA29 due to User Location Constraints and Automatic Periphery Placement
Info (176253): Node "TMDS_DATA[1]" assigned to PIN AA29 due to Automatic Periphery Placement
Info (171110): Nodes could not be merged because their location constraints do not overlap
Info (171109): Node "TMDS_DATA[1]~input" assigned to IOIBUF_X89_Y32_N4 due to Automatic Periphery Placement
Why? and how can I force the use of ddio register?
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Hi,
Can you try to remove the user-defined location setting for the TMDS_DATA[1] node?
Thanks.
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Do you mean pin assignment? Should fitter put input elsewhere?
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Hi,
Yes. Can you check in Assignment Editor?
Thanks.
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In Assignments Editor:
- Set Location(to pins only) for TMDS_DATA
- Set I/O Standart(LVDS) for TMDS_DATA
- Set Input termination
- Set Fast Input register(enable)
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Hi,
Can you disable the location assignment?
Thanks
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Hi,
Can you provide the design.qar for investigation?
Thanks.
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Hi,
The error cannot be reproduced. I enable the following assignments and the software reported that this node does not exist in the design.
set_instance_assignment -name FAST_INPUT_REGISTER ON -to "TMDS_Receiver:TMDSReceiver_inst0|dd_green"
set_instance_assignment -name FAST_INPUT_REGISTER ON -to "TMDS_Receiver:TMDSReceiver_inst0|dd_red"
set_instance_assignment -name FAST_INPUT_REGISTER ON -to "TMDS_Receiver:TMDSReceiver_inst0|dd_blue"
set_instance_assignment -name FAST_INPUT_REGISTER ON -to "TMDS_Receiver:TMDSReceiver_inst1|dd_blue"
set_instance_assignment -name FAST_INPUT_REGISTER ON -to "TMDS_Receiver:TMDSReceiver_inst1|dd_green"
set_instance_assignment -name FAST_INPUT_REGISTER ON -to "TMDS_Receiver:TMDSReceiver_inst1|dd_red"
Could you help to check?
Thanks.

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