公开(公告)号：US20210167989A1

公开(公告)日：2021-06-03

申请号：US17063450

申请日：2020-10-05

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Richard Sterling BROUGHTON ,  Vijayalakshmi DEVARAJAN ,  Wesley Ryan RAY ,  Dushmantha Bandara RAJAPAKSHA

IPC: H04L12/40 ,  H04M3/02

Abstract: A transceiver includes a driver stage and a transient-triggered ring suppression circuit. The driver stage has a first transistor coupled between a supply voltage terminal and a first bus terminal and a second transistor coupled between a ground and a second bus terminal. The transient-triggered ring suppression circuit is coupled to the first and second transistors. The transient-triggered ring suppression circuit is configured to be enabled upon transition of the transceiver from a dominant state to a recessive state. Further, while the transceiver is in the recessive state, the transient-triggered ring suppression circuit is configured to attenuate ringing on at least one of the first or second bus terminals.

公开(公告)号：US20210325951A1

公开(公告)日：2021-10-21

申请号：US17178789

申请日：2021-02-18

Applicant: Texas Instruments Incorporated

Inventor： Vijayalakshmi DEVARAJAN ,  Wesley Ryan RAY ,  Richard Edwin Hubbard

IPC: G06F1/3234 ,  G06F1/26 ,  G06F13/42

Abstract: A system basis chip (SBC) includes a serial peripheral interface for communication with a processor, a set of registers for storing information operable to control an external communication interface device, and a control signal output adapted to be coupled to the external communication interface device. In some implementations, the set of registers includes a first register for information indicative of a function of the control signal, and a second register for information indicative of a value of the control signal. The function of the control signal for the external communication interface device can be a supply voltage interrupt, a watchdog interrupt event, a counter-based watchdog interrupt event, a local wakeup request, a bus wakeup request, an entrance into a fail-safe mode of operation, or a general purpose output signal. In some implementations, the SBC also includes a supply voltage output adapted to be coupled to the external communication interface device.

公开(公告)号：US20200049754A1

公开(公告)日：2020-02-13

申请号：US16101213

申请日：2018-08-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Richard Edwin HUBBARD ,  Abhijeeth AAREY PREMANATH ,  Terry MAYHUGH ,  Mark Edward WENTROBLE ,  Wesley Ryan RAY

IPC: G01R31/02 ,  H04L12/24 ,  G01R19/25

Abstract: A CAN bus transceiver includes CAN bus fault detection circuitry that can provide detailed information to simplify the task of the service technician when there is a CAN bus fault. Voltage and current measurements of the CAN bus are made and from them a fault type is determined. A time-domain reflectometer monitors the CAN bus signals for transmitted and reflected signals and from them a distance to the fault is determined. Either or both values are provided to a service technician to allow error determination and correction.