Using DMA from ADC to DTCM with STM32F765VITx

[BobbyBeta]

I have a project that is using DMA channels to transfer ADC values to DTCM. The values seem to be getting to the memory correctly but I was confused by Figure 1 of the datasheet which shows the ADC/DMA/SRAM on the AHB but the DTCM on a bus that appears to be disconnected from the AHB -> https://www.st.com/resource/en/reference_manual/rm0410-stm32f76xxx-and-stm32f77xxx-advanced-armbased-32bit-mcus-stmicroelectronics.pdf

 

What is the path the data is taking from the ADC to the DTCM? Is there any timing penalty from the data taking this path?

 

 

[TDK]

The AHBS connects DTCM RAM to the bus matrix.

Not much is published on the speed of various transfers within the chip, but given that the AHBS is a slave just like interfaces to SRAM, the speed is likely comparable to what you'd get transferring it into SRAM.

 

[BobbyBeta]

Honestly, this morning I don't see how I missed that AHBS line connecting to DTCM through the Cortex-M7 last night. Thanks for the reply.