C2510Fx / CC2511Fx
Byte
Bit
Field Name
Description
Offset
4
7:5
VLEN[2:0]
Variable length transfer mode. In word mode, bits 12:0 of the first word is considered
as the transfer length.
000
001
Use LENfor transfer count
Transfer number of bytes/words commanded by first byte/word + 1
(transfers length byte/word, and then as many bytes/words as dictated by
length byte/word up to a maximum specified by LEN).
010
011
100
Transfer number of bytes/words commanded by first byte/word (transfers
length byte/word, and then as many bytes/words as dictated by length
byte/word – 1 up to a maximum specified by LEN).)
Transfer number of bytes/words commanded by first byte/word + 2
(transfers length byte/word, and then as many bytes/words as dictated by
length byte/word + 1 up to a maximum specified by LEN)
Transfer number of bytes/words commanded by first byte/word + 3
(transfers length byte/word, and then as many bytes/words as dictated by
length byte/word + 2 up to a maximum specified by LEN)
101
110
111
Reserved
Reserved
Alternative for using LENas transfer count
4
5
4:0
7:0
LEN[12:8]
LEN[7:0]
The DMA channel transfer count.
This value is used as transfer count when VLEN=000or VLEN=111(fixed length
transfers) and as maximum allowable length when VLEN≠000and VLEN≠111
(variable length transfers). The DMA channel counts in words when in WORDSIZE
mode, and otherwise in bytes.
The DMA channel transfer count.
This value is used as transfer count when VLEN=000or VLEN=111(fixed length
transfers) and as maximum allowable length when VLEN≠000and VLEN≠111
(variable length transfers). The DMA channel counts in words when in WORDSIZE
mode, and otherwise in bytes.
6
6
7
WORDSIZE
TMODE[1:0]
Selects whether each DMA transfer shall be 8-bit (0) or 16-bit (1).
The DMA channel transfer mode:
6:5
00
01
10
11
Single
Block
Repeated single
Repeated block
6
4:0
TRIG[4:0]
Select DMA trigger
00000
00001
00010
-
No trigger (writing to DMAREQ is only trigger)
The previous DMA channel finished
Selects one of the triggers shown in Table 51. The trigger is selected in the
order shown in the table.
11111
7
7:6
SRCINC[1:0]
Source address increment mode (after each transfer)
00
01
10
11
0 bytes/words
1 bytes/words
2 bytes/words
-1 bytes/words
SWRS055D
Page 106 of 243
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
