Confusion about Lockstep

[david tomsa]

Posted on January 05, 2018 at 10:41

Hi Guys,

i'm confused about the Safety Manual from the SPC57 µC.

In section 3.2.4 Dual core lockstep mode stands, that i have to check MC_ME_CS[S_CORE1] and MC_ME_CS[S_CORE2]. I don't know what is meant by S_CORE2. 

Best regards

David

[Erwan YVIN]

Posted on January 08, 2018 at 11:33

Hello David ,

Could you confirm your RM Used ?

i do not find the chapter relative to 

MC_ME_CS[S_CORE1] and 

MC_ME_CS[S_CORE2]

     Best regards

               Erwan

[david tomsa]

Posted on January 08, 2018 at 14:10

It's the Safety Manual From this Controller: 

http://www.st.com/content/ccc/resource/technical/document/application_note/b6/56/a3/0f/dc/7c/4d/17/DM00076080.pdf/files/DM00076080.pdf/jcr:content/translations/en.DM00076080.pdf

 

[Erwan YVIN]

Posted on January 08, 2018 at 15:02

Hello David ,

Yes , S_CORE2 is not relevant.

SPC570S microcontroller should have a main core and checker core

(cf below)

For my point of view , we should have 

Before starting safety-relevant operations, the application software checks that lockstep mode is enabled (in the Mode Entry Module (MC_ME)) and configure the FCCU to react to lockstep disablement (MC_ME_CS[S_CORE1] = 1 (checker) and MC_ME_CS[S_CORE0] = 1 (master)).[end]

Anyway , i am checking with experts.

   Best Regards

                   Erwan