STM source clock of S32R274

[Durant-Harden-Irving]

Hello,

Now I am developping the STM module of S32R274.

I want to make sure that which clock is used for STM counter calculation? System clock or PBRIDGE_n_CLK?

Backgrount:  In the document "S32R274RM.pdf" :

1. page 155, figure 5-4  , we can see, the souce clock of STM is PBRIDGE_n_CLK

2. But in page 2356, we can see, the source clock is System clock : "The counter is driven by the system clock divided by an 8-bit prescale value (1
to 256)."

Thanks!

[Durant-Harden-Irving]

Hi David，

Thanks very much！

[davidtosenovjan · Accepted solution]

Hi, PBRIDGE_n_CLK is correct.

From module’s perspective it is system clock, unfortunately it is relic from internal documentation for the module. Figure 5-4 shows clock routing given by device integration and you may see both used clocks for STM are tied to PBRIDGE_n_CLK.