=========================================================================== report_checks -unconstrained ============================================================================ ======================= Slowest Corner =================================== Startpoint: gpio_defaults[8] (input port clocked by serial_clock) Endpoint: _108_ (recovery check against falling-edge clock serial_load') Path Group: **async_default** Path Type: max Corner: ss 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 ^ input external delay 5.00 0.00 10.00 ^ gpio_defaults[8] (in) 4 0.02 gpio_defaults[8] (net) 5.00 0.00 10.00 ^ _072_/B (sky130_fd_sc_hd__or2_0) 0.29 1.06 11.06 ^ _072_/X (sky130_fd_sc_hd__or2_0) 1 0.01 _005_ (net) 0.29 0.00 11.07 ^ _108_/RESET_B (sky130_fd_sc_hd__dfbbn_2) 11.07 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) 0.18 1.18 51.18 ^ clkbuf_0_serial_load/X (sky130_fd_sc_hd__clkbuf_16) 2 0.02 clknet_0_serial_load (net) 0.18 0.00 51.18 ^ clkbuf_1_0__f_serial_load/A (sky130_fd_sc_hd__clkbuf_16) 0.10 0.29 51.47 ^ clkbuf_1_0__f_serial_load/X (sky130_fd_sc_hd__clkbuf_16) 6 0.04 clknet_1_0__leaf_serial_load (net) 0.10 0.00 51.47 ^ _095__3/A (sky130_fd_sc_hd__inv_2) 0.04 0.08 51.55 v _095__3/Y (sky130_fd_sc_hd__inv_2) 1 0.01 net34 (net) 0.04 0.00 51.55 v _108_/CLK_N (sky130_fd_sc_hd__dfbbn_2) -0.40 51.15 clock uncertainty 0.00 51.15 clock reconvergence pessimism -0.18 50.96 library recovery time 50.96 data required time ----------------------------------------------------------------------------- 50.96 data required time -11.07 data arrival time ----------------------------------------------------------------------------- 39.90 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 Corner: ss 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) 0.17 1.68 26.68 v clkbuf_0_serial_clock/X (sky130_fd_sc_hd__clkbuf_16) 2 0.02 clknet_0_serial_clock (net) 0.17 0.00 26.68 v clkbuf_1_0__f_serial_clock/A (sky130_fd_sc_hd__clkbuf_16) 0.07 0.34 27.01 v clkbuf_1_0__f_serial_clock/X (sky130_fd_sc_hd__clkbuf_16) 9 0.03 clknet_1_0__leaf_serial_clock (net) 0.07 0.00 27.02 v _059__14/A (sky130_fd_sc_hd__inv_2) 0.09 0.11 27.13 ^ _059__14/Y (sky130_fd_sc_hd__inv_2) 1 0.01 net45 (net) 0.09 0.00 27.13 ^ _132_/CLK (sky130_fd_sc_hd__dfrtp_2) 0.13 0.93 28.05 v _132_/Q (sky130_fd_sc_hd__dfrtp_2) 1 0.02 net21 (net) 0.13 0.00 28.05 v output21/A (sky130_fd_sc_hd__buf_16) 0.22 0.42 28.48 v output21/X (sky130_fd_sc_hd__buf_16) 1 0.25 serial_data_out (net) 0.22 0.01 28.48 v serial_data_out (out) 28.48 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 -28.48 data arrival time ----------------------------------------------------------------------------- 11.12 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 Corner: ss 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) 0.18 1.31 1.31 ^ clkbuf_0_serial_clock/X (sky130_fd_sc_hd__clkbuf_16) 2 0.02 clknet_0_serial_clock (net) 0.18 0.00 1.31 ^ clkbuf_1_0__f_serial_clock/A (sky130_fd_sc_hd__clkbuf_16) 0.09 0.31 1.62 ^ clkbuf_1_0__f_serial_clock/X (sky130_fd_sc_hd__clkbuf_16) 9 0.04 clknet_1_0__leaf_serial_clock (net) 0.09 0.00 1.62 ^ _121_/CLK (sky130_fd_sc_hd__dfrtp_4) 0.12 1.05 2.67 v _121_/Q (sky130_fd_sc_hd__dfrtp_4) 1 0.01 shift_register[2] (net) 0.12 0.00 2.67 v hold5/A (sky130_fd_sc_hd__dlygate4sd3_1) 0.18 1.31 3.98 v hold5/X (sky130_fd_sc_hd__dlygate4sd3_1) 2 0.01 net50 (net) 0.18 0.00 3.98 v _107_/D (sky130_fd_sc_hd__dfbbn_2) 3.98 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) 0.18 1.18 51.18 ^ clkbuf_0_serial_load/X (sky130_fd_sc_hd__clkbuf_16) 2 0.02 clknet_0_serial_load (net) 0.18 0.00 51.18 ^ clkbuf_1_1__f_serial_load/A (sky130_fd_sc_hd__clkbuf_16) 0.12 0.30 51.49 ^ clkbuf_1_1__f_serial_load/X (sky130_fd_sc_hd__clkbuf_16) 8 0.06 serial_load_out_buffered (net) 0.12 0.00 51.49 ^ _094__2/A (sky130_fd_sc_hd__inv_2) 0.05 0.09 51.58 v _094__2/Y (sky130_fd_sc_hd__inv_2) 1 0.01 net33 (net) 0.05 0.00 51.58 v _107_/CLK_N (sky130_fd_sc_hd__dfbbn_2) -0.40 51.18 clock uncertainty 0.00 51.18 clock reconvergence pessimism -0.41 50.77 library setup time 50.77 data required time ----------------------------------------------------------------------------- 50.77 data required time -3.98 data arrival time ----------------------------------------------------------------------------- 46.79 slack (MET) ======================= Typical Corner =================================== 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 Corner: tt 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 Corner: tt 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 Corner: tt 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) ======================= Fastest Corner =================================== 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 Corner: ff 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) 0.56 1.16 11.16 ^ _087_/Y (sky130_fd_sc_hd__nand2b_2) 1 0.01 _020_ (net) 0.56 0.00 11.16 ^ _115_/SET_B (sky130_fd_sc_hd__dfbbn_2) 11.16 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) 0.13 -0.01 49.99 ^ clkbuf_0_serial_load/X (sky130_fd_sc_hd__clkbuf_16) 2 0.02 clknet_0_serial_load (net) 0.13 0.00 49.99 ^ clkbuf_1_1__f_serial_load/A (sky130_fd_sc_hd__clkbuf_16) 0.06 0.13 50.12 ^ clkbuf_1_1__f_serial_load/X (sky130_fd_sc_hd__clkbuf_16) 8 0.06 serial_load_out_buffered (net) 0.06 0.00 50.12 ^ _102__10/A (sky130_fd_sc_hd__inv_2) 0.02 0.03 50.14 v _102__10/Y (sky130_fd_sc_hd__inv_2) 1 0.01 net41 (net) 0.02 0.00 50.14 v _115_/CLK_N (sky130_fd_sc_hd__dfbbn_2) -0.40 49.74 clock uncertainty 0.00 49.74 clock reconvergence pessimism 0.00 49.75 library recovery time 49.75 data required time ----------------------------------------------------------------------------- 49.75 data required time -11.16 data arrival time ----------------------------------------------------------------------------- 38.58 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 Corner: ff 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) 0.13 1.22 26.22 v clkbuf_0_serial_clock/X (sky130_fd_sc_hd__clkbuf_16) 2 0.02 clknet_0_serial_clock (net) 0.13 0.00 26.22 v clkbuf_1_0__f_serial_clock/A (sky130_fd_sc_hd__clkbuf_16) 0.03 0.16 26.38 v clkbuf_1_0__f_serial_clock/X (sky130_fd_sc_hd__clkbuf_16) 9 0.04 clknet_1_0__leaf_serial_clock (net) 0.03 0.00 26.38 v _059__14/A (sky130_fd_sc_hd__inv_2) 0.04 0.05 26.43 ^ _059__14/Y (sky130_fd_sc_hd__inv_2) 1 0.01 net45 (net) 0.04 0.00 26.43 ^ _132_/CLK (sky130_fd_sc_hd__dfrtp_2) 0.07 0.26 26.69 ^ _132_/Q (sky130_fd_sc_hd__dfrtp_2) 1 0.02 net21 (net) 0.07 0.00 26.69 ^ output21/A (sky130_fd_sc_hd__buf_16) 0.21 0.21 26.90 ^ output21/X (sky130_fd_sc_hd__buf_16) 1 0.25 serial_data_out (net) 0.21 0.01 26.91 ^ serial_data_out (out) 26.91 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 -26.91 data arrival time ----------------------------------------------------------------------------- 12.69 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 Corner: ff 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) 0.13 -0.01 -0.01 ^ clkbuf_0_serial_clock/X (sky130_fd_sc_hd__clkbuf_16) 2 0.02 clknet_0_serial_clock (net) 0.13 0.00 -0.01 ^ clkbuf_1_0__f_serial_clock/A (sky130_fd_sc_hd__clkbuf_16) 0.04 0.13 0.12 ^ clkbuf_1_0__f_serial_clock/X (sky130_fd_sc_hd__clkbuf_16) 9 0.04 clknet_1_0__leaf_serial_clock (net) 0.04 0.00 0.12 ^ _121_/CLK (sky130_fd_sc_hd__dfrtp_4) 0.05 0.31 0.43 v _121_/Q (sky130_fd_sc_hd__dfrtp_4) 1 0.01 shift_register[2] (net) 0.05 0.00 0.43 v hold5/A (sky130_fd_sc_hd__dlygate4sd3_1) 0.06 0.42 0.86 v hold5/X (sky130_fd_sc_hd__dlygate4sd3_1) 2 0.01 net50 (net) 0.06 0.00 0.86 v _107_/D (sky130_fd_sc_hd__dfbbn_2) 0.86 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) 0.13 -0.01 49.99 ^ clkbuf_0_serial_load/X (sky130_fd_sc_hd__clkbuf_16) 2 0.02 clknet_0_serial_load (net) 0.13 0.00 49.99 ^ clkbuf_1_1__f_serial_load/A (sky130_fd_sc_hd__clkbuf_16) 0.06 0.13 50.12 ^ clkbuf_1_1__f_serial_load/X (sky130_fd_sc_hd__clkbuf_16) 8 0.06 serial_load_out_buffered (net) 0.06 0.00 50.12 ^ _094__2/A (sky130_fd_sc_hd__inv_2) 0.03 0.03 50.14 v _094__2/Y (sky130_fd_sc_hd__inv_2) 1 0.01 net33 (net) 0.03 0.00 50.14 v _107_/CLK_N (sky130_fd_sc_hd__dfbbn_2) -0.40 49.74 clock uncertainty 0.00 49.74 clock reconvergence pessimism -0.10 49.65 library setup time 49.65 data required time ----------------------------------------------------------------------------- 49.65 data required time -0.86 data arrival time ----------------------------------------------------------------------------- 48.79 slack (MET) =========================================================================== report_checks --slack_max -0.01 ============================================================================ ======================= Slowest Corner =================================== No paths found. ======================= Typical Corner =================================== No paths found. ======================= Fastest Corner =================================== No paths found.