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CHAPTER 15 DMAC
15.9 DMAC Timing Charts
This section provides the following DMAC timing charts:
• Timing charts for the descriptor access block
• Timing charts for the data transfer block
• Transfer stop timing charts in continuous transfer mode
• Transfer termination timing charts
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Codes Used in the Timing Charts
Table 15.9-1 Codes Used in the Timing Charts
Code Meaning
#0 Descriptor No.0
#0H Bit 31 to bit 16 of descriptor No. 0
#0L Bit 15 to bit 0 of descriptor No. 0
#1 Descriptor No. 1
#1H Bit 31 to bit 16 of descriptor No. 1
#1L Bit 15 to bit 0 of descriptor No. 1
#2 Descriptor No. 2
#2H Bit 31 to bit 16 of descriptor No. 2
#2L Bit 15 to bit 0 of descriptor No. 2
#1/2 Descriptor No. 1 or No. 2 (determined by SCS1 and SCS0 and DCS1 and
DCS0)
#1/2H Bits 31 to 16 of Descriptor No.1 or 2
#1/2L Bit 15 to bit 0 of descriptor No. 1 or No. 2
S Transfer source
SH Bits 31 to 16 of transfer source
SL Bits 15 to 0 of transfer source
D Transfer destination
DH Bit 31 to bit 16 of the transfer destination
DL Bit 15 to bit 0 of the transfer source