S32KのトピックRe: RAM Initialization

RAM Initialization

SreejithN — Thu, 23 Mar 2023 13:14:39 GMT

Hi,

I am using s32k146 in my current project. In that i have a requirement to initialize the RAM except a particular section on every reset other than Power On Reset. (On Power On Reset all data should be initialized) . Is there any wat to do this?

Thanks

Re: RAM Initialization

VaneB — Thu, 23 Mar 2023 17:51:50 GMT

Hi @SreejithN

Take a look at section 31.3.4 (SRAM retention: power modes and resets) of the S32K1xx Series Reference Manual, Rev. 13.

B.R.

VaneB

Re: RAM Initialization

SreejithN — Mon, 27 Mar 2023 09:56:05 GMT

Hi @VaneB

Thanks for your information.

By using SRAM retention, it is possible to save either the entire SRAM_U or SRAM_L data. However, is there any other option to retain only a particular section on reset? For example, can we retain only the data between '0x2000EC00 to 0x2000EFFF' on SRAM_U while initializing all other data?

Re: RAM Initialization

VaneB — Mon, 27 Mar 2023 19:17:26 GMT

Hi @SreejithN

The following link is for an example of SRAM retention, which may help clarify how this works on the S32K1.

Example S32K144 RAM Retention S32DS.R1