US 11,693,445 B2
Electronic system, corresponding method of operation and electronic device
Giuseppe Cavallaro, Catania (IT)
Assigned to STMICROELECTRONICS S.R.L., Agrate Brianza (IT)
Filed by STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed on Dec. 4, 2020, as Appl. No. 17/112,853.
Claims priority of application No. 102019000023091 (IT), filed on Dec. 5, 2019.
Prior Publication US 2021/0181783 A1, Jun. 17, 2021
Int. Cl. G06F 1/08 (2006.01); G06F 1/10 (2006.01); H04L 12/40 (2006.01)
CPC G06F 1/08 (2013.01) [G06F 1/10 (2013.01); H04L 12/40032 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electronic system comprising:
a first electronic device;
a second electronic device; and
a clock generator circuit configured to provide a clock signal having a selectable frequency;
wherein the first electronic device comprises a first processing circuit having coupled therewith a first Ethernet interface and the second electronic device comprises a second processing circuit having coupled therewith a second Ethernet interface;
wherein the first Ethernet interface is directly connected to the second Ethernet interface for exchanging frames between the first electronic device and the second electronic device, with a set of output data pins of the first Ethernet interface coupled to a set of homologous input data pins of the second Ethernet interface, and a set of output data pins of the second Ethernet interface coupled to a set of homologous input data pins of the first Ethernet interface;
wherein the first Ethernet interface and the second Ethernet interface comprise respective input clock pins coupled to the clock generator circuit to receive therefrom the clock signal having the selectable frequency;
wherein the first Ethernet interface and the second Ethernet interface comprise respective receive error pins coupled to ground without utilizing transmit error signals; and
wherein at least one of the first electronic device and the second electronic device is configured to:
select a frequency of the clock signal as a function of at least one operating parameter of the first electronic device and/or of the second electronic device, and/or as a function of at least one parameter of the frames exchanged between the first electronic device and the second electronic device; and
act on the clock generator circuit to operate the clock generator circuit at the selected frequency.