公开(公告)号：EP3879730A1

公开(公告)日：2021-09-15

申请号：EP21158711.8

申请日：2021-02-23

Applicant: STMicroelectronics Application GmbH

Inventor： RENNIG, Mr. Fred

IPC: H04L1/00 ,  H04L12/40 ,  H04L12/403 ,  G06F11/07 ,  B60R16/023

Abstract: An electronic device is configured for coupling to a communication bus to receive therefrom frames encoded according to a communication protocol. The electronic device comprises a check circuit sensitive to said frames and configured to perform a check (203, 204, 205) as to whether a received frame is encoded according to said communication protocol and is addressed to the electronic device. The electronic device comprises a frame counter circuit configured to count frames received during a monitoring time interval by increasing a frame count value as a result of a positive outcome of said check. The electronic device comprises a comparator circuit configured to set a status bit to a first value indicative of a first operating status of the electronic device as a result of the frame count value being equal (208) to a first threshold value, and to a second value indicative of a second operating status of the electronic device as a result of the frame count value being equal (210) to a second threshold value. The electronic device comprises a controller circuit configured to transmit (212a) over the communication bus a frame comprising the status bit, and configured to reset (214) the frame count value at the end of the monitoring time interval.
The frame counter circuit comprises a modular arithmetic counter circuit having a certain bit depth. The frame count value is constrained to a modulus value of the modular arithmetic counter circuit.

公开(公告)号：EP3547620B1

公开(公告)日：2020-11-25

申请号：EP19162919.5

申请日：2019-03-14

Applicant: STMicroelectronics Application GmbH ,  STMicroelectronics Design and Application s.r.o.

Inventor： RENNIG, Mr. Fred ,  BERAN, Mr. Ludek

IPC: H04L12/403 ,  G05B19/042 ,  G06F11/07 ,  H03M13/09