W90N745CD Datasheet, PDF (196/422 Pages) Winbond – 16/32-bit ARM microcontroller

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.
REGISTER
ADDRESS R/W
DESCRIPTION
RESET
VALUE
OperationalModeEnable 0xFFF0_5204 R/W USB Operational Mode Enable Register 0x0000_0000
31
23
15
7
BITS
[31:9]
[8]
[7:4]
[3]
[2:1]
[0]
30
29
22
21
14
13
6
5
Reserved
28
27
Reserved
20
19
Reserved
12
11
Reserved
4
3
OVRCUR
26
25
18
17
10
9
2
1
Reserved
24
16
8
SIEPD
0
DBREG
Reserved
SIEPD
Reserved
OVRCURP
Reserved
DBREG
BIT DESCRIPTION
Reserved. Read/write 0
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.
Reserved. Read/write 0
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.
Reserved. Read/write 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