STMicroelectronics /STM32U5Fx /GPDMA1 /GPDMA_C2TR1

binary logarithm of the source data width of a burst, in bytes- 00: byte- 01: half-word (2 bytes)- 10: word (4 bytes)- 11: a user setting error is reported and no transfer is issued.Note: Setting a 8-byte data width is causing a user setting error to be reported and none transfer is issued.Note: a source block size must be a multiple of the source data width (c.f. GPDMA_CxBR1.BNDT[2:0] vs SDW_LOG2[1:0]). Else a user setting error is reported and none transfer is issued.Note: A source burst transfer must have an aligned address with its data width (c.f. start address GPDMA_CxSAR[2:0] and address offset GPDMA_CxTR3.SAO[2:0] vs SDW_LOG2[1:0]). Else a user setting error is reported and none transfer is issued.

source incrementing burst- 0: fixed burst- 1: contiguously incremented burstThe source address, pointed by DMA_CxSAR, is either kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.

source burst length minus 1 , between 0 and 63.Burst length unit is one data a.k.a. beat within a burst.If SBL_1[5:0]=0, then burst can be named as single.Each data/beat has a width defined by the source data width i.e. SDW_LOG2[1:0].Note: A burst transfer must have an aligned address (c.f. start address GPDMA_CxSAR and address offset GPDMA_CxTR3.SAO) with its data width (byte, half-word or word). Else a user setting error is reported and none transfer is issued.Note: If a burst transfer would have crossed a 1kB address boundary on a AHB transfer, internally DMA modifies and shortens the programmed burst into single(s) or burst(s) of lower length, to be compliant with the AHB protocol.Note: If a burst transfer is of length greater than the FIFO size of the channel x, internally DMA modifies and shortens the programmed burst into single(s) or burst(s) of lower length, to be compliant with the FIFO size. Transfer performance is lower, with DMA re-arbitration between effective and lower burst(s)/singles, but data integrity is guaranteed.

PAM

source byte exchange within the unaligned half-word of each source wordIf source data width is shorter than a word, this bit is ignored.If source data width is a word:- 0: no byte-based exchange within the unaligned half-word of each source word- 1: the two consecutive bytes within the unaligned half-word of each source word are exchanged

source allocated portAllocate the master port to the source transfer.- 0: port 0 (AHB) is allocated to the source transfer- 1: port 1 (AHB) is allocated to the source transferNote: This bit must be written when EN=0. This bit is read-only when EN=1.

security attribute of the DMA transfer from the sourceThis is a secure register bit.This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx=1. A secure write is ignored when GPDMA_SECCFGR.SECx=0.When is de-asserted GPDMA_SECCFGR.SECx, this bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the DMA transfer from the source is non-secure.If GPDMA_SECCFGR.SECx=1 (and a secure access):- 0: non-secure- 1: secure

binary logarithm of the destination data width of a burst, in bytes- 00: byte- 01: half-word (2 bytes)- 10: word (4 bytes)- 11: a user setting error is reported and no transfer is issued.Note: Setting a 8-byte data width is causing a user setting error to be reported and none transfer is issued.Note: A destination burst transfer must have an aligned address with its data width (c.f. start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0] vs DDW_LOG2[1:0]). Else a user setting error is reported and none transfer is issued.Note: When configured in packing mode (i.e. if PAM[1]=1 and destination data width different from source data width), a source block size must be a multiple of the destination data width (c.f. GPDMA_CxBR1.BNDT[2:0] vs DDW_LOG2[1:0]). Else a user setting error is reported and none transfer is issued.

destination incrementing burst- 0: fixed burst- 1: contiguously incremented burstThe destination address, pointed by DMA_CxDAR, is either kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.

destination burst length minus 1 , between 0 and 63.Burst length unit is one data a.k.a. beat within a burst.If DBL_1[5:0]=0, then burst can be named as single.Each data/beat has a width defined by the destination data width i.e. DDW_LOG2[1:0].Note: A burst transfer must have an aligned address with its data width (c.f. start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0] vs DDW_LOG2[1:0]). Else a user setting error is reported and none transfer is issued.Note: If a burst transfer would have crossed a 1kB address boundary on a AHB transfer, internally DMA modifies and shortens the programmed burst into single(s) or burst(s) of lower length, to be compliant with the AHB protocol.Note: If a burst transfer is of length greater than the FIFO size of the channel x, internally DMA modifies and shortens the programmed burst into single(s) or burst(s) of lower length, to be compliant with the FIFO size. Transfer performance is lower, with DMA re-arbitration between effective and lower burst(s)/singles, but data integrity is guaranteed.

destination byte exchangeIf destination data size is a byte, this bit is ignored.If destination data size is not a byte:- 0: no byte-based exchange within half-word- 1: the two consecutive (post PAM) bytes are exchanged in each destination half-word

destination half-word exchangeIf destination data size is shorter than a word, this bit is ignored.If destination data size is a word:- 0: no halfword-based exchange within word- 1: the two consecutive (post PAM) half-words are exchanged in each destination word

destination allocated portAllocate the master port to the destination transfer.- 0: port 0 (AHB) is allocated to the destination transfer- 1: port 1 (AHB) is allocated to the destination transferNote: This bit must be written when EN=0. This bit is read-only when EN=1.

security attribute of the DMA transfer to the destinationThis is a secure register bit.This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx=1. A secure write is ignored when GPDMA_SECCFGR.SECx=0.When is de-asserted GPDMA_SECCFGR.SECx, this bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the DMA transfer to the destination is non-secure.If GPDMA_SECCFGR.SECx=1 (and a secure access):- 0: non-secure- 1: secure