W90N745CD/W90N745CDG
USB Operational Mode Enable Register
This register selects which operational mode is enabled. Bits defined as write-only are read as 0's.
RESET
VALUE
REGISTER
ADDRESS R/W
DESCRIPTION
OperationalModeEnable 0xFFF0_5204
R/W USB Operational Mode Enable Register
0x0000_0000
31
30
29
28
20
27
26
25
24
16
Reserved
23
15
7
22
14
6
21
13
5
19
Reserved
18
10
2
17
9
12
Reserved
11
8
SIEPD
0
4
3
1
Reserved
Reserved
DBREG
OVRCUR
BITS
BIT DESCRIPTION
Reserved
SIEPD
Reserved. Read/write 0
[31:9]
SIE Pipeline Disable
When set, waits for all USB bus activity to complete prior to
returning completion status to the List Processor. This is a failsafe
mechanism to avoid potential problems with the clk_dr transition
between 1.5 MHz and 12 MHz.
[8]
Reserved
Reserved. Read/write 0
[7:4]
[3]
OVRCURP (over current indicator polarity)
When the OVRCURP bit is clear, the OVRCUR non-inverted to
input into USB host controller. In contrast, when the OVRCURP bit
is set, the OVRCUR inverted to input into USB host controller.
OVRCURP
Reserved
DBREG
Reserved. Read/write 0
[2:1]
[0]
Data Buffer Region 16
When set, the size of the data buffer region is 16 bytes. Otherwise, the
size is 32 bytes.
Publication Release Date: September 22, 2006
- 191 -
Revision A2
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