topic bus clock of Analog comparator in i.MX RT Crossover MCUs

bus clock of Analog comparator

Abhay2080 — Tue, 31 Mar 2026 16:35:31 GMT

Hi,

I am working with ACMP3 and ACMP4, to compare two analog signals and i am using sampled filtered mode where i have selected SE=0, that means internal bus clock to the CMP, But i am not able to find the value of this bus clock. Could you help me? Also there is not much information to select SAMPLE input as clock (SE=1). Working in IMXRT1024....5A

Re: bus clock of Analog comparator

Gavin_Jia — Wed, 01 Apr 2026 03:17:37 GMT

Hi @Abhay2080 ,

Thanks for your interest in NXP MIMXRT series!

For ACMP clocks with SE=0,Please refer to this section of the CCM:

When SE=1, the external clock typically comes from the XBAR.

The external SAMPLE signal should be routed to a source(such as PWM, PIT, etc) by Inter-Peripheral Crossbar

Best regards,
Gavin

Re: bus clock of Analog comparator

Abhay2080 — Wed, 01 Apr 2026 04:54:17 GMT

That means if IPG_CLK_ROOT is 62.5MHz then this is the bus clock for ACMP3 and ACMP4 right?