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AN666

USAGE GUIDE FOR SIM3U1XX, SIM3C1XX, AND SIM3L1XX DMA AND DTM MODULES

Silicon Laboratories 

AN666

4.1.1. Channel Transfer Descriptors

Table 1, Table 2, and Table 3 describe the source end pointer, destination pointer, and configuration descriptors for

the primary, alternate, and scatter-gather DMA channel descriptors.

Table 1. DMA0_CHx_SRCEND: Source End Pointer

Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

Name

SRCEND[31:16]

Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Name

SRCEND[15:0]

Address in Channel Transfer Descriptor: 0x0000

Bit

Name

Function

31:0

SRCEND Source End Pointer.

This field is the address of the last source data in the DMA transfer.

Table 2. DMA0_CHx_DSTEND: Destination End Pointer

Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

Name

DSTEND[31:16]

Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Name

DSTEND[15:0]

Address in Channel Transfer Descriptor: 0x0004

Bit

Name

Function

31:0

DSTEND Destination End Pointer.

This field is the last destination address of the DMA transfer.

Rev. 0.1

5

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