公开(公告)号：US20220171669A1

公开(公告)日：2022-06-02

申请号：US17671903

申请日：2022-02-15

Applicant: Intel Corporation

Inventor： Rajesh BHASKAR ,  George VERGIS ,  Myron LOEWEN ,  Matthew A. SCHNOOR

IPC: G06F11/07 ,  G06F11/14 ,  G06F13/42 ,  G06F13/16

Abstract: An apparatus and method to monitor status of a serial data signal on a low speed serial bus is provided. A controller configures a watchdog timer in each target device, sends a heart-beat command to all of the target devices over the low speed serial bus prior to the expiration of the watchdog timer and issues a broadcast read command to any one of the target devices on the low speed serial bus. A response to the broadcast read command confirms that the low speed serial bus is functional. If a response is not received, the low speed serial bus is not functional and the controller initiates a broadcast reset command to initialize all target devices on the low speed serial bus.