STCU Online BIST Total Execution Time

[marv_marsian]

Hello,

I have MPC5777C 3N45H mcu, and I have programmed the online STCU unit. 

I have checked the datasheet and reference manual, but I could not find an information about the total execution time of the unit. I am doing all the MBIST and LBIST's. What is the maximum time that is required to complete all the tests? What does this time depend on?

Thanks in advance.

Best wishes.

[davidtosenovjan]

Full BIST execution time is around 200ms.

It is stated in excel attachment of AN5288:
https://www.nxp.com/docs/en/application-note/AN5288.pdf

[txll]

Hello,

I have a question about the online Full BIST total (MBIST + LBIST) execution time on MPC5777C 3N45H so I decided to ask here instead of opening a new thread.

The clock configuration is:

PLL0 = sys_clk = 50MHz

fm_per_clk = 25MHz

STCU2 core clk = 12.5MHz (STCU2_CFG.CLK_CFG = 0x1)

STCU2_LB_CTRLn.SHS = 0

I have run the test successfully and using different STCU2_WDG values I was able to roughly determine the execution time:

STCU2_WDG = 0x27715 -> 206ms -> run OK

STCU2_WDG = 0x23DBB -> 188ms -> LBIST does not finish and STCU2_ERR_STAT.WDTOSW is set.

So far so good - execution time is around 200ms.

My issue is that looking at "MPC5777C_BIST_Execution_Time_protected_v2.0.xlsx" - when I set STCU_Clock_Frequency (MHz) = 12.5, it shows Full execution time = 0.766805s. Where does this difference come from? Is my configuration and execution time reasonable? Or is there something which I haven't understood correctly?

Thank you.