USB Registers
16.5.6.1 DMA_SCHED_CTRL Register (offset = 0h) [reset = 0h]
DMA_SCHED_CTRL is shown in
and described in
.
Figure 16-275. DMA_SCHED_CTRL Register
31
30
29
28
27
26
25
24
ENABLE
Reserved
R/W-0h
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
7
6
5
4
3
2
1
0
LAST_ENTRY
R/W-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 16-288. DMA_SCHED_CTRL Register Field Descriptions
Bit
Field
Type
Reset
Description
31
ENABLE
R/W
0h
This is the enable bit for the scheduler and is encoded as follows:
0 = scheduler is disabled and will no longer fetch entries from the
scheduler table or pass credits to the DMA controller
1 = scheduler is enabled This bit should only be set after the table
has been initialized.
7-0
LAST_ENTRY
R/W
0h
This field indicates the last valid entry in the scheduler table.
There are 64 words in the table and there are 4 entries in each word.
The table can be programmed with any integer number of entries
from 1 to 256.
The corresponding encoding for this field is as follows:
0 = 1 entry
1 = 2 entries ...
254 = 255 entries
255 = 256 entries CPPI DMA Scheduler Control Registers
2082
Universal Serial Bus (USB)
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated