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PMath.4
PMath.4
Senior III
February 2, 2020
Question

STM32H743: what is the source of adc_hclk?

  • February 2, 2020
  • 1 reply
  • 559 views

The reference manual explains how I can select between adc_hclk and adc_ker_ck_input as the clock for the ADC but I can't find what the source is for adc_hclk. It is one of the AHB or APB peripheral clocks but which one? Nowhere in the manual can I find what the allocation of the ADC is to the peripheral bus and hence the clock. The RCC section doesn't mention adc_hclk at all and the system architecture section doesn't show the allocation of the ADC

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1 reply

waclawek.jan
waclawek.jan
Super User
February 2, 2020

Yes this should be said explicitly in the RCC chapter or the interconnections chapter of RM.

I'd assume adc_hclk is the clock of the AHB bus to which the given ADC is attached to; this based on the diagram where adc_hclk is the clock driving the AHB interface of the given ADC.

0690X00000BxhuxQAB.png

JW

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