EDMA3 Registers
11.4.1.1.5 QDMA Channel Map n Registers (QCHMAPn)
Each QDMA channel in EDMA3CC can be associated with any PaRAM set available on the device.
Furthermore, the specific trigger word (0-7) of the PaRAM set can be programmed. The PaRAM set
association and trigger word for every QDMA channel register is configurable using the QDMA channel
map n register (QCHMAPn).
The QCHMAPn is shown in
and described in
NOTE:
At reset the QDMA channel map registers for all QDMA channels point to PaRAM set 0. If an
application makes use of both a DMA channel that points to PaRAM set 0 and any QDMA
channels, ensure that QCHMAPn is programmed appropriately to point to a different PaRAM
entry.
Figure 11-46. QDMA Channel Map n Registers (QCHMAPn)
31
16
Reserved
R-0
15
14
13
5
4
2
1
0
Reserved
PAENTRY
TRWORD
Reserved
R-0
R/W-0
R/W-0
R-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 11-30. QDMA Channel Map n Registers (QCHMAPn) Field Descriptions
Bit
Field
Value
Description
31-14
Reserved
0
Reserved. Always write 0 to this bit; writes of 1 to this bit are not supported and attempts to do
so may result in undefined behavior.
13-5
PAENTRY
0-1FFh
PAENTRY points to the PaRAM set number for QDMA channel n.
0-FFh
Parameter entry 0 through 255.
100h-1FFh
Reserved.
4-2
TRWORD
0-7h
Points to the specific trigger word of the PaRAM set defined by PAENTRY. A write to the trigger
word results in a QDMA event being recognized.
1-0
Reserved
0
Reserved. Always write 0 to this bit; writes of 1 to this bit are not supported and attempts to do
so may result in undefined behavior.
947
SPRUH73H – October 2011 – Revised April 2013
Enhanced Direct Memory Access (EDMA)
Copyright © 2011–2013, Texas Instruments Incorporated