USB Registers
16.5.7.201 QUEUE_41_C Register (offset = 2298h) [reset = 0h]
QUEUE_41_C is shown in
and described in
.
Figure 16-477. QUEUE_41_C Register
31
30
29
28
27
26
25
24
HEAD_TAIL
Reserved
W-0
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
PACKET_SIZE
R/W-0
7
6
5
4
3
2
1
0
PACKET_SIZE
R/W-0
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 16-491. QUEUE_41_C Register Field Descriptions
Bit
Field
Type
Reset
Description
31
HEAD_TAIL
W-0
0
Head/Tail Push Control.
Set to zero in order to push packet onto tail of queue and set to one
in order to push packet onto head of queue.
13-0
PACKET_SIZE
R/W-0
0
packet_size This field indicates packet size and is assumed to be
zero on each packet add unless the value is explicitly overwritten.
This field indicates packet size for packet pop operation.
2309
SPRUH73H – October 2011 – Revised April 2013
Universal Serial Bus (USB)
Copyright © 2011–2013, Texas Instruments Incorporated