Bouffalo Lab BL702 - Page 147

BL702/704/706 Reference Manual
6.5.38 DMA_C4Control
Address：0x4000c50c
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
TCI
EN
PROTECT DI SI RSVD FIXCNT DTW STW ADD
MODE
DBS
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
DBS MIN
MODE
SBS TS
Bits
Name Type Reset Description
31 TCIEN R/W 0 Terminal count interrupt enable bit. It controls whether the
current LLI is expected to trigger the terminal count inter-
rupt.
30:28 PROTECT R/W 0 Protection.
27 DI R/W 1 Destination increment. When set, the Destination address
is incremented after each transfer.
26 SI R/W 1 Source increment. When set, the source address is incre-
mented after each transfer.
25 RSVD
24:23 FIXCNT R/W 2’d0 Only effect when dst_min_mode = 1
Destination transfer cnt = (total src byte cnt - (fix_-
cnt«DWidth))«DWidth
22:21 DTW R/W 3’b010 Destination transfer width: 8/16/32
20:18 STW R/W 3’b010 Source transfer width: 8/16/32
17 ADDMODE R/W 1’b0 Add mode : issue remain destination traffic
16:15 DBS R/W 3’b001 Destination burst size: 1/4/8/16
14 MINMODE R/W 1’b0 Minus mode : Not issue all destination traffic
13:12 SBS R/W 3’b001 Source burst size: 1/4/8/16. Note CH FIFO Size is 16Bytes
and SBSize*Swidth should <= 16B
11:0 TS R/W 0 Transfer size: 0 4095. Number of data transfers left to com-
plete when the SMDMA is the flow controller.
BL702/704/706 Reference Manual 147/ 375
@2021 Bouffalo Lab
guest@bouffalolab