
import sys
import numpy as np
from matplotlib import pyplot as plt

from c4m import flexio as _io
from c4m.pdk import ihpsg13g2

from corners import corner_spec


# Determine the order of the corner simulation and output to file
corners = ("NOM", "FAST", "FAST_COMM", "FAST_ROOM", "SLOW", "SLOW_COMM", "SLOW_ROOM")

_iofab = ihpsg13g2.ihpsg13g2_iofab
iospec = _iofab.spec
strengths = iospec.clampdrive
assert isinstance(strengths, dict)
cells = (
    *(_iofab.out(drivestrength=s) for s in strengths.keys()),
    *(_iofab.triout(drivestrength=s) for s in strengths.keys()),
    *(_iofab.inout(drivestrength=s) for s in strengths.keys()),
)


n_corners = len(corners)
n_cells = len(cells)
n_sims = n_corners*n_cells
i_source = np.ndarray((n_corners, n_cells))
i_sink = np.ndarray((n_corners, n_cells))
for i_corner, corner in enumerate(corners):
    print(corner, file=sys.stderr)
    v_vdd, v_iovdd, temp, tc = corner_spec[corner]
    s_tc = ", ".join(tc)

    for i_cell, cell in enumerate(cells):
        ckt = cell.circuit
        tb = ihpsg13g2.pyspicefab.new_pyspicecircuit(corner=tc, top=ckt)

        tb.V("vss", "vss", tb.gnd, 0.0)
        tb.V("vdd", "vdd", tb.gnd, v_vdd)
        tb.V("iovss", "iovss", tb.gnd, 0.0)
        tb.V("iovdd", "iovdd", tb.gnd, v_iovdd)

        tb.PieceWiseLinearVoltageSource("c2p", "c2p", "vss", dc=0.0, values=(
            (0.0, 0.0),
            (1e-3, 0.0),
            (1.1e-3, v_vdd),
        ))
        if isinstance(cell, (_io.PadTriOutT, _io.PadInOutT)):
            tb.V("c2p_en", "c2p_en", "vss", v_vdd)
        if isinstance(cell, _io.PadInOutT):
            tb.C("p2c", "p2c", "vss", 10e-15)
        tb.PieceWiseLinearVoltageSource("pad", "pad", "iovss", dc=0.0, values=(
            (0.0, 0.0),
            (0.1e-3, v_iovdd),
            (1.0e-3, v_iovdd),
            (1.1e-3, 0.0),
        ))

        sim = tb.simulator(temperature=temp, gmin=1e-9)

        try:
            trans = sim.transient(step_time=0.1e-3, end_time=2e-3)
        except:
            sink = np.nan
            source = np.nan
        else:
            time = np.array(trans.time)
            i_pad = np.array(trans.vpad)

            sink = -np.interp(0.5e-3, time, i_pad)
            source = np.interp(1.5e-3, time, i_pad)

        print(f"{i_corner*n_cells + i_cell + 1}/{n_sims}")
        i_sink[i_corner, i_cell] = sink
        i_source[i_corner, i_cell] = source

NOM
Warning: m=xx on .subckt line will override multiplier m hierarchy!
Warning: m=xx on .subckt line will override multiplier m hierarchy!

1/63
2/63

Warning: m=xx on .subckt line will override multiplier m hierarchy!
Warning: m=xx on .subckt line will override multiplier m hierarchy!
Warning: m=xx on .subckt line will override multiplier m hierarchy!

3/63
4/63

Warning: m=xx on .subckt line will override multiplier m hierarchy!

5/63

Warning: m=xx on .subckt line will override multiplier m hierarchy!
Warning: m=xx on .subckt line will override multiplier m hierarchy!

6/63
7/63

Warning: m=xx on .subckt line will override multiplier m hierarchy!

8/63


from IPython.display import Markdown

_s = "# Sink current\n"
_s += "| | *" + "* | *".join(corners) + "* |\n"
_s += "|-"*(n_corners + 1) + " |\n"
for i_cell in range(n_cells):
    _s += f"| *{cells[i_cell].name}* | "
    _s += " | ".join(
        f"{1000*i_sink[i_corner, i_cell]:.1f} mA" for i_corner in range(n_corners)
    )
    _s += " |\n"
_s += "# Source current\n"
_s += "| | *" + "* | *".join(corners) + "* |\n"
_s += "|-"*(n_corners + 1) + " |\n"
for i_cell in range(n_cells):
    _s += f"| *{cells[i_cell].name}* | "
    _s += " | ".join(
        f"{1000*i_source[i_corner, i_cell]:.1f} mA" for i_corner in range(n_corners)
    )
    _s += " |\n"
Markdown(_s)

	NOM	FAST	FAST_COMM	FAST_ROOM	SLOW	SLOW_COMM	SLOW_ROOM
sg13g2_IOPadOut4mA	4.0 mA	6.1 mA	5.5 mA	5.2 mA	2.3 mA	2.6 mA	3.0 mA
sg13g2_IOPadOut16mA	16.0 mA	24.5 mA	22.2 mA	20.9 mA	9.3 mA	10.6 mA	11.9 mA
sg13g2_IOPadOut30mA	30.0 mA	46.0 mA	41.6 mA	39.1 mA	17.4 mA	19.9 mA	22.2 mA
sg13g2_IOPadTriOut4mA	4.0 mA	6.1 mA	5.5 mA	5.2 mA	2.3 mA	2.6 mA	3.0 mA
sg13g2_IOPadTriOut16mA	16.0 mA	24.5 mA	22.2 mA	20.9 mA	9.3 mA	10.6 mA	11.9 mA
sg13g2_IOPadTriOut30mA	30.0 mA	46.0 mA	41.6 mA	39.1 mA	17.4 mA	19.9 mA	22.2 mA
sg13g2_IOPadInOut4mA	4.0 mA	6.1 mA	5.5 mA	5.2 mA	2.3 mA	2.6 mA	3.0 mA
sg13g2_IOPadInOut16mA	16.0 mA	24.5 mA	22.2 mA	20.9 mA	9.3 mA	10.6 mA	11.9 mA
sg13g2_IOPadInOut30mA	30.0 mA	46.0 mA	41.6 mA	39.1 mA	17.4 mA	19.9 mA	22.2 mA

	NOM	FAST	FAST_COMM	FAST_ROOM	SLOW	SLOW_COMM	SLOW_ROOM
sg13g2_IOPadOut4mA	4.0 mA	6.4 mA	5.9 mA	5.6 mA	2.3 mA	2.5 mA	2.8 mA
sg13g2_IOPadOut16mA	16.0 mA	25.5 mA	23.4 mA	22.2 mA	9.2 mA	10.2 mA	11.1 mA
sg13g2_IOPadOut30mA	30.0 mA	47.8 mA	43.9 mA	41.6 mA	17.3 mA	19.1 mA	20.7 mA
sg13g2_IOPadTriOut4mA	4.0 mA	6.4 mA	5.9 mA	5.6 mA	2.3 mA	2.5 mA	2.8 mA
sg13g2_IOPadTriOut16mA	16.0 mA	25.5 mA	23.4 mA	22.2 mA	9.2 mA	10.2 mA	11.1 mA
sg13g2_IOPadTriOut30mA	30.0 mA	47.8 mA	43.9 mA	41.6 mA	17.3 mA	19.1 mA	20.7 mA
sg13g2_IOPadInOut4mA	4.0 mA	6.4 mA	5.9 mA	5.6 mA	2.3 mA	2.5 mA	2.8 mA
sg13g2_IOPadInOut16mA	16.0 mA	25.5 mA	23.4 mA	22.2 mA	9.2 mA	10.2 mA	11.1 mA
sg13g2_IOPadInOut30mA	30.0 mA	47.8 mA	43.9 mA	41.6 mA	17.3 mA	19.1 mA	20.7 mA

Preamble¶

Setup¶

Simulation¶

Sink current¶

Source current¶