公开(公告)号：US20210255682A1

公开(公告)日：2021-08-19

申请号：US17156910

申请日：2021-01-25

Applicant: Texas Instruments Incorporated

Inventor： Lakshmanan BALASUBRAMANIAN ,  Aswani Kumar GOLLA ,  Venkatraman RAMAKRISHNAN ,  Sushmitha Tudiyadka GIRIJASHANKAR

IPC: G06F1/26

Abstract: A method for boundary port modelling that correctly handles back-to-back isolation intent, level shifter intent and voltage level association, by providing hard association of power domains to soft data objects, such as wires. The method includes identifying a boundary port in a detailed power intent (DPI) for a soft design object (SDO). A non-wire object is inserted in the SDO for the boundary port. In the DPI, a power domain of the boundary port is assigned to the non-wire object.

公开(公告)号：US20240078369A1

公开(公告)日：2024-03-07

申请号：US17899252

申请日：2022-08-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Lakshmanan BALASUBRAMANIAN ,  Venkatraman RAMAKRISHNAN

IPC: G06F30/367 ,  H03K19/0948 ,  H03K19/20

CPC classification number: G06F30/367 ,  H03K19/0948 ,  H03K19/20 ,  G06F2119/06

Abstract: A “weak” undriven state is defined as a signal state, distinguished from conventional unknown and high impedance states, and methods of representing this “weak” undriven state in circuit modelling and power aware digital/mixed-signal simulations for comprehensive and complete RTL-level design verification. The conventional unknown state refers to a circuit element that is powered but has an unknown value, a circuit element that is not powered, or a circuit element having an undriven, floating signal. The unknown state is modified, and the “weak” undriven state refers to a circuit element that is not powered and has an unknown value. The “weak” undriven state can have an electrically high impedance to known supply or ground when no other circuit element is active. The “weak” undriven state distinction is particularly useful to model and verify circuit designs known to be resilient to “weak” undriven states, using event driven logic circuit simulators.