How does S32K3 Automatic address translation work?

[jackey267]

hi team： 

1） How does S32K3 Automatic address translation work? 

2） how does the S32K3  A/B swap work in details ? 

thanks 

[lukaszadrapa]

Hi,

In case of S32K3, there's support in HSE firmware. You can download HSE FW and HSE demo app, HSE OTADEMO including documentation from:

https://www.nxp.com/webapp/swlicensing/sso/downloadSoftware.sp?catid=SW32K3-STDSW-D

https://www.nxp.com/webapp/swlicensing/sso/downloadSoftware.sp?catid=SW32K3-REFSW-D

HSE Reference Manual is then provided under NDA on docstore.nxp.com

In short: if AB swap is enabled, the flash is divided to two parts - active and passive block. The active block is always the lower one, passive higher one. New application is loaded to passive block. Once it is done, swapping is requested. After next reset, passive block becomes active block. The advantage is that no position independent code is needed because active block is still at the same location.

Regards,

Lukas

[jackey267]

hi  Lukas：

thank you for you sincerely reply.

1 Does the base address of the two Pflash  has been changed  to keep   "The active block is always the lower one, passive higher one"  as you said? 

2 Or the image contents of Pflash A   has been totally copied into  Pflash B  as you mentioned  "Once it is done, swapping is requested" ?  in another words, a data copy and move will be happened at there ? 

thanks 

[lukaszadrapa]

Hi Jack,

it's not copied, the addresses are translated by HW.

Regards

Lukas