US 12,413,446 B2
System to improve can communications between microcontrollers
Marco António Da Silva Esteves, Braga (PT); Emanuel José Rodrigues Da Silva, Covelas (PT); and José Rui Amorim Gomes, Braga (PT)
Assigned to BOSCH CAR MULTIMEDIA PORTUGAL, S.A., Braga (PT)
Appl. No. 18/687,392
Filed by BOSCH CAR MULTIMEDIA PORTUGAL, S.A., Braga (PT)
PCT Filed Dec. 22, 2021, PCT No. PCT/IB2021/062145
§ 371(c)(1), (2) Date Mar. 26, 2024,
PCT Pub. No. WO2023/118934, PCT Pub. Date Jun. 29, 2023.
Claims priority of application No. 117654 (PT), filed on Dec. 21, 2021.
Prior Publication US 2024/0356776 A1, Oct. 24, 2024
Int. Cl. H04L 12/40 (2006.01); H03K 19/20 (2006.01)
CPC H04L 12/40169 (2013.01) [H03K 19/20 (2013.01); H04L 2012/40215 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A system (10) to improve data communications between two microcontrollers, microcontroller A (100) and microcontroller B (200), comprising
a set of diodes, diode A (104) and a diode B (204), installed in series in a Tx output line (103, 203) of a CAN (Controller Area Network) controller (101, 201) comprised in each of the two microcontrollers (100, 200), said diodes (104, 204) installed inversely with respect to the Tx output lines (103, 203) data flow;
an isolation barrier (300), installed in series in a Rx input line B (202) of a CAN controller B (201) of the microcontroller B (200) and in series with an anode output of diode B (204) connected to the Tx output line B (203) of the CAN controller B (201), adapted to provide an isolated Rx input line B (202) and an isolated Tx output line B (203); and
a pull-up resistor A (301) connected with a first terminal to a voltage regulator A (302) and a second terminal connected simultaneously to the isolated Rx input line B (202), to the isolated Tx output line B (203), to a Rx input line A (102) of a CAN controller A (101) of the microcontroller A (100) and an anode output of diode A (104) connected to a Tx output line A (103) of the CAN controller A (101).