Dst_Inc; Dst_Size; Src_Size; Src_Inc - Epson S1C31D50 Technical Instructions

DMA transfer procedure
1. Configure the data structure table for scatter-gather transfer.
Set the cycle_ctrl for the last task to 0x1 and those for other tasks to 0x5.
2. Start data transfer by following the procedure shown in Section 6.2.1, "Initialization." In Step 2 of
the initialization procedure, configure the primary data structure with the control data shown
below.
Transfer source end pointer = Data structure table end address
Transfer destination end pointer = Alternate data structure end address
dst_inc = 0x2
dst_size = 0x2
src_inc = 0x2
src_size = 0x2
R_power = 0x2
n_minus_1 = Number of tasks × 4 - 1
cycle_ctrl = 0x4
3. The DMA transfer is completed when a DMA transfer completion interrupt occurs.
6-10
Seiko Epson Corporation
S1C31D50 TECHNICAL MANUAL
(Rev. 1.00)