STMicroelectronics /STM32U535 /LPDMA1 /LPDMA_C0LLR

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Interpret as LPDMA_C0LLR

31 2827 2423 2019 1615 1211 87 43 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0LA0 (ULL)ULL 0 (UDA)UDA 0 (USA)USA 0 (UB1)UB1 0 (UT2)UT2 0 (UT1)UT1

Description

LPDMA channel x linked-list address register

Fields

LA

pointer (16-bit low significant address) to the next linked-list data structure If UT1=UT2=UB1=USA=UDA=ULL=0 and if LA[15:2]=0: the current LLI is the last one. The channel transfer is completed without any update of the linked-list DMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure will be automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list DMA internal register file i.e. possibly LPDMA_CxCTR1, LPDMA_CxTR2, LPDMA_CxBR1, LPDMA_CxSAR, LPDMA_CxDAR and LPDMA_CxLLR. Note: The user should program the pointer to be 32-bit aligned. The two low significant bits are write ignored.

ULL

Update LPDMA_CxLLR from memory This bit controls the update of the LPDMA_CxLLR register from the memory during the link transfer. - 0: no LPDMA_CxLLR update - 1: LPDMA_CxLLR update

UDA

Update LPDMA_CxDAR from memory This bit controls the update of the LPDMA_CxDAR register from the memory during the link transfer. - 0: no LPDMA_CxDAR update - 1: LPDMA_CxDAR update

USA

Update LPDMA_CxSAR from memory This bit controls the update of the LPDMA_CxSAR register from the memory during the link transfer. - 0: no LPDMA_CxSAR update - 1: LPDMA_CxSAR update

UB1

Update LPDMA_CxBR1 from memory This bit controls the update of the LPDMA_CxBR1 register from the memory during the link transfer. If UB1=0 and if LPDMA_CxLLR != 0, the linked-list is not completed. Then LPDMA_CxBR1.BNDT[15:0] is restored to the programmed value after data transfer is completed and before the link transfer. - 0: no LPDMA_CxBR1 update (LPDMA_CxBR1.BNDT[15:0] is restored, if any link transfer) - 1: LPDMA_CxBR1 update

UT2

Update LPDMA_CxTR2 from memory This bit controls the update of the LPDMA_CxTR2 register from the memory during the link transfer. - 0: no LPDMA_CxTR2 update - 1: LPDMA_CxTR2 update

UT1

Update LPDMA_CxTR1 from memory This bit controls the update of the LPDMA_CxTR1 register from the memory during the link transfer. - 0: no LPDMA_CxTR1 update - 1: LPDMA_CxTR1 update

Links

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