ISD94100 Series Technical Reference Manual
Sep 9, 2019
Page
284
of 928
Rev1.09
IS
D
9
410
0
S
ER
IE
S
T
E
C
HN
ICA
L
RE
F
E
RE
NCE
M
AN
U
AL
NEXT
Bits
Description
[31:16]
EXENEXT
PDMA Execution Next Descriptor Table Offset
This field indicates the offset of next descriptor table address of current execution
descriptor table in system memory.
Note:
write operation is useless in this field.
[15:0]
NEXT
PDMA Next Descriptor Table Offset
This field indicates the offset of the next descriptor table address in system memory.
Write Operation:
If the system memory based address is 0x2000_0000 (PDMA_SCATBA), and the next
descriptor table is start from 0x2000_0100, then this field must fill in 0x0100.
Read Operation:
When operating in scatter-gather mode, the last two bits NEXT[1:0] will become reserved,
and indicate the first next address of system memory.
Note 1:
The first descriptor table address must be word boundary.
Note 2:
Before filled transfer task in the descriptor table, user must check if the descriptor
table is complete.
Note 3:
The address of descriptor tables must be in the same 64KB area.
Note:
The reset value of this field will be different every time powered chip.
Содержание ISD94100 Series
Страница 528: ...ISD94100 Series Technical Reference Manual Sep 9 2019 Page 528 of 928 Rev1 09 ISD94100 SERIES TECHNICAL REFERENCE MANUAL...
Страница 626: ...ISD94100 Series Technical Reference Manual Sep 9 2019 Page 626 of 928 Rev1 09 ISD94100 SERIES TECHNICAL REFERENCE MANUAL...
Страница 702: ...ISD94100 Series Technical Reference Manual Sep 9 2019 Page 702 of 928 Rev1 09 ISD94100 SERIES TECHNICAL REFERENCE MANUAL...
Страница 875: ...ISD94100 Series Technical Reference Manual Sep 9 2019 Page 875 of 928 Rev1 09 ISD94100 SERIES TECHNICAL REFERENCE MANUAL...