How To fix the Hold time violations

Hold time violations fixing Techniques

The following techniques are used to fix the Hold time violations

1. Down-size the cell
2. LVT to HVT conversion
3. Add Delay cell on Data path

1).Down-size the buffer

• get_cells
• get_lib_cells -of_object cell_name  (which cell you want to down-size NOR4X0_HVT)
• get_alternative_lib_cells cell_name
• size_cell cell_name saed32hvt_ff1p16vn40c/NOR2X0_HVT (corresponding cell name along with Library )

2).LVT to HVT conversion

• get_cells
• get_lib_cells -of_objects U453 (cell name NOR4X0_LVT)
• size_cell U453 NOR4X0_HVT  (U453 instance name of the cell)

3).Add Delay cell on Data path

• insert_buffer net_name DELX4

Note: Here cell name means Instance name