=========================================================================== report_checks -unconstrained ============================================================================ Startpoint: gpio_defaults[12] (input port clocked by serial_clock) Endpoint: _115_ (recovery check against falling-edge clock serial_load') Path Group: **async_default** Path Type: max Fanout Cap Slew Delay Time Description ----------------------------------------------------------------------------- 0.00 0.00 clock serial_clock (rise edge) 0.00 0.00 clock network delay (propagated) 10.00 10.00 v input external delay 5.00 0.00 10.00 v gpio_defaults[12] (in) 4 0.02 gpio_defaults[12] (net) 5.00 0.00 10.00 v _087_/B (sky130_fd_sc_hd__nand2b_2) 0.73 1.27 11.27 ^ _087_/Y (sky130_fd_sc_hd__nand2b_2) 1 0.01 _020_ (net) 0.73 0.00 11.27 ^ _115_/SET_B (sky130_fd_sc_hd__dfbbn_2) 11.27 data arrival time 50.00 50.00 clock serial_load' (fall edge) 0.00 50.00 clock source latency 5.00 0.00 50.00 ^ serial_load (in) 2 0.02 serial_load (net) 5.00 0.00 50.00 ^ clkbuf_0_serial_load/A (sky130_fd_sc_hd__clkbuf_16) 0.16 0.59 50.59 ^ clkbuf_0_serial_load/X (sky130_fd_sc_hd__clkbuf_16) 2 0.02 clknet_0_serial_load (net) 0.16 0.00 50.59 ^ clkbuf_1_1__f_serial_load/A (sky130_fd_sc_hd__clkbuf_16) 0.08 0.19 50.78 ^ clkbuf_1_1__f_serial_load/X (sky130_fd_sc_hd__clkbuf_16) 8 0.06 serial_load_out_buffered (net) 0.08 0.00 50.78 ^ _102__10/A (sky130_fd_sc_hd__inv_2) 0.03 0.04 50.82 v _102__10/Y (sky130_fd_sc_hd__inv_2) 1 0.01 net41 (net) 0.03 0.00 50.82 v _115_/CLK_N (sky130_fd_sc_hd__dfbbn_2) -0.40 50.42 clock uncertainty 0.00 50.42 clock reconvergence pessimism -0.05 50.37 library recovery time 50.37 data required time ----------------------------------------------------------------------------- 50.37 data required time -11.27 data arrival time ----------------------------------------------------------------------------- 39.11 slack (MET) Startpoint: _132_ (rising edge-triggered flip-flop clocked by serial_clock') Endpoint: serial_data_out (output port clocked by serial_clock) Path Group: serial_clock Path Type: max Fanout Cap Slew Delay Time Description ----------------------------------------------------------------------------- 25.00 25.00 clock serial_clock' (rise edge) 0.00 25.00 clock source latency 5.00 0.00 25.00 v serial_clock (in) 2 0.02 serial_clock (net) 5.00 0.00 25.00 v clkbuf_0_serial_clock/A (sky130_fd_sc_hd__clkbuf_16) 0.16 1.54 26.54 v clkbuf_0_serial_clock/X (sky130_fd_sc_hd__clkbuf_16) 2 0.02 clknet_0_serial_clock (net) 0.16 0.00 26.54 v clkbuf_1_0__f_serial_clock/A (sky130_fd_sc_hd__clkbuf_16) 0.04 0.22 26.77 v clkbuf_1_0__f_serial_clock/X (sky130_fd_sc_hd__clkbuf_16) 9 0.03 clknet_1_0__leaf_serial_clock (net) 0.04 0.00 26.77 v _059__14/A (sky130_fd_sc_hd__inv_2) 0.05 0.07 26.84 ^ _059__14/Y (sky130_fd_sc_hd__inv_2) 1 0.01 net45 (net) 0.05 0.00 26.84 ^ _132_/CLK (sky130_fd_sc_hd__dfrtp_2) 0.10 0.41 27.25 ^ _132_/Q (sky130_fd_sc_hd__dfrtp_2) 1 0.02 net21 (net) 0.10 0.00 27.25 ^ output21/A (sky130_fd_sc_hd__buf_16) 0.27 0.29 27.54 ^ output21/X (sky130_fd_sc_hd__buf_16) 1 0.25 serial_data_out (net) 0.27 0.01 27.55 ^ serial_data_out (out) 27.55 data arrival time 50.00 50.00 clock serial_clock (rise edge) 0.00 50.00 clock network delay (propagated) -0.40 49.60 clock uncertainty 0.00 49.60 clock reconvergence pessimism -10.00 39.60 output external delay 39.60 data required time ----------------------------------------------------------------------------- 39.60 data required time -27.55 data arrival time ----------------------------------------------------------------------------- 12.05 slack (MET) Startpoint: _121_ (rising edge-triggered flip-flop clocked by serial_clock) Endpoint: _107_ (falling edge-triggered flip-flop clocked by serial_load') Path Group: serial_load Path Type: max Fanout Cap Slew Delay Time Description ----------------------------------------------------------------------------- 0.00 0.00 clock serial_clock (rise edge) 0.00 0.00 clock source latency 5.00 0.00 0.00 ^ serial_clock (in) 2 0.02 serial_clock (net) 5.00 0.00 0.00 ^ clkbuf_0_serial_clock/A (sky130_fd_sc_hd__clkbuf_16) 0.17 0.65 0.66 ^ clkbuf_0_serial_clock/X (sky130_fd_sc_hd__clkbuf_16) 2 0.02 clknet_0_serial_clock (net) 0.17 0.00 0.66 ^ clkbuf_1_0__f_serial_clock/A (sky130_fd_sc_hd__clkbuf_16) 0.06 0.19 0.85 ^ clkbuf_1_0__f_serial_clock/X (sky130_fd_sc_hd__clkbuf_16) 9 0.04 clknet_1_0__leaf_serial_clock (net) 0.06 0.00 0.85 ^ _121_/CLK (sky130_fd_sc_hd__dfrtp_4) 0.06 0.50 1.35 v _121_/Q (sky130_fd_sc_hd__dfrtp_4) 1 0.01 shift_register[2] (net) 0.06 0.00 1.35 v hold5/A (sky130_fd_sc_hd__dlygate4sd3_1) 0.09 0.64 1.98 v hold5/X (sky130_fd_sc_hd__dlygate4sd3_1) 2 0.01 net50 (net) 0.09 0.00 1.98 v _107_/D (sky130_fd_sc_hd__dfbbn_2) 1.98 data arrival time 50.00 50.00 clock serial_load' (fall edge) 0.00 50.00 clock source latency 5.00 0.00 50.00 ^ serial_load (in) 2 0.02 serial_load (net) 5.00 0.00 50.00 ^ clkbuf_0_serial_load/A (sky130_fd_sc_hd__clkbuf_16) 0.16 0.59 50.59 ^ clkbuf_0_serial_load/X (sky130_fd_sc_hd__clkbuf_16) 2 0.02 clknet_0_serial_load (net) 0.16 0.00 50.59 ^ clkbuf_1_1__f_serial_load/A (sky130_fd_sc_hd__clkbuf_16) 0.08 0.19 50.78 ^ clkbuf_1_1__f_serial_load/X (sky130_fd_sc_hd__clkbuf_16) 8 0.06 serial_load_out_buffered (net) 0.08 0.00 50.78 ^ _094__2/A (sky130_fd_sc_hd__inv_2) 0.03 0.05 50.82 v _094__2/Y (sky130_fd_sc_hd__inv_2) 1 0.01 net33 (net) 0.03 0.00 50.82 v _107_/CLK_N (sky130_fd_sc_hd__dfbbn_2) -0.40 50.42 clock uncertainty 0.00 50.42 clock reconvergence pessimism -0.17 50.25 library setup time 50.25 data required time ----------------------------------------------------------------------------- 50.25 data required time -1.98 data arrival time ----------------------------------------------------------------------------- 48.27 slack (MET) =========================================================================== report_checks --slack_max -0.01 ============================================================================ No paths found.