Scott A Monroe

US Patent:

20130094353, Apr 18, 2013

Filed:

Nov 14, 2011

Appl. No.:

13/295256

Inventors:

Scott Allen Monroe - Frisco TX, US
David Wayne Stout - Lewisville TX, US

Assignee:

TEXAS INSTRUMENTS INCORPORATED - Dallas TX

International Classification:

H04L 12/26

US Classification:

370225, 370242

Abstract:

A controller area network (CAN) node comprises an internal high differential bus line (CANH) and an internal low differential bus line (CANL). The CAN node further comprises a receiver (RXD) comparator coupled to both the internal CANH and the internal CANL that outputs an internal RXD signal. The CAN node further comprises an RXD dominant time out (DTO) circuit. The RXD DTO circuit includes: a) an RXD dominant transition detector coupled to an output of the RXD comparator; b) a timer triggered by the RXD dominant transition detector detecting a dominant RXD transition; c) an RXD dominant timer comparator that is coupled to an output of the timer which compares an output of the timer to a selected value; d) an internal RXD dominant signal is changed to an RXD DTO recessive signal after a selected time interval has lapsed and can include a fault output to signal this fault condition.

US Patent:

20230031600, Feb 2, 2023

Filed:

Jul 29, 2021

Appl. No.:

17/388858

Inventors:

- Dallas TX, US
Scott Allen Monroe - Frisco TX, US

International Classification:

G06F 11/30
G06F 11/07
G06F 13/42

Abstract:

A method, system, and apparatus for fault detection in a microprocessor-based system uses a serial data communication protocol for communications between a peripheral device and a controller. Peripheral device interface circuitry is adapted to intermittently receive input serial data frames from the controller using the serial communication protocol and to intermittently send output serial data frames to the controller using the serial communication protocol. Each output serial data frame includes one or more status bits representing communication status data and one or more data bits representing peripheral device data. The status bits and the data bits are serially followed by at least one fault bit that indicates whether a fault is detected during sending of the output serial data frame.