USB Registers
16.5.7.12 LRAM0SIZE Register (offset = 84h) [reset = 0h]
LRAM0SIZE is shown in
and described in
.
Figure 16-288. LRAM0SIZE Register
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reserved
REGION0_SIZE
R/W-0
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 16-302. LRAM0SIZE Register Field Descriptions
Bit
Field
Type
Reset
Description
13-0
REGION0_SIZE
R/W-0
0
This field indicates the number of entries that are contained in the
linking RAM region 0.
A descriptor with index less than region0_size value has its linking
location in region 0.
A descriptor with index greater than region0_size has its linking
location in region 1.
The queue manager will add the index (left shifted by 2 bits) to the
appropriate regionX_base_addr to get the absolute
32-bit address to the linking location for a descriptor.
Queue Manager Linking Ram Region 0 Size Register
2120
Universal Serial Bus (USB)
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated