| * CACE gensim simulation file ${FILENAME}_${N} |
| * Generated by CACE gensim, efabless inc. (c) 2017 |
| |
| .lib "/ef/tech/SW/EFS8A/libs.tech/ngspice/s8.lib" ${CORNER} |
| |
| .option TEMP = ${TEMPERATURE} |
| |
| .include "${DUT_PATH}" |
| |
| XDUT ${PIN:A:A} ${PIN:X:X} |
| +${PIN:VDD3V3:VDD3V3} ${PIN:VDD1V8:VDD1V8} ${PIN:VSS:VSS} ${DUT_NAME} |
| |
| VVIN A VSS DC 0 PWL ( |
| + 0 ${VOLTAGE:VDD1V8} 500n ${VOLTAGE:VDD1V8} 501n ${VOLTAGE:VSS} 1u ${VOLTAGE:VSS}) |
| * Device is unloaded for prop delay test |
| * RLOAD OUT 0 ${RESISTANCE:X} |
| * CLOAD OUT 0 ${CAPACITANCE:X} |
| VVDD33 VDD3V3 VSS DC ${VOLTAGE:VDD3V3} |
| VVDD18 VDD1V8 VSS DC ${VOLTAGE:VDD1V8} |
| VVSS VSS 0 DC ${VOLTAGE:VSS} |
| |
| * Propagation delay. Input differential (VOLTAGE:VDIFF) is set to the |
| * overdrive voltage. Set this to the low value, then switch |
| * to the high. Measure the time for the output to change state |
| * (cross VDDA / 2). |
| |
| .control |
| tran 1e-9 1e-6 |
| meas tran tfall WHEN V(X) = ${VOLTAGE:VDD3V3} 2 ${/} CROSS=1 |
| let tpd = $&tfall - 500e-9 |
| echo "${FILENAME} = ", "$&tpd" |
| quit |
| .endc |
| .end |
