Device control and status register – Digi NS9750 User Manual
Page 742
U S B G l o b a l r e g i s t e r s
7 1 8
N S 9 7 5 0 H a r d w a r e R e f e r e n c e
Device Control and Status register
Address: 9010 0004
The Device Control and Status register contains the USB device-block-specific control
and status information.
D05
R
SUSP
0
Suspend
0
The USB device is not in a suspended state
1
The USB device is in a suspended state
Indicates whether the USB device is in a suspended state.
D04:03
N/A
Not used
0
Always write a 0.
D02
R/W
WKUP
0
Wakeup
Value depends on the value written to the HST_DEV field
(bit 0 in this register).
When the NS9750 is in device mode, the device
driver can write a 1 to this field to enable remote
wakeup.
When the NS9750 is in host mode, this field is
ignored.
D01
R
Not used
1
Always read as 1.
D00
R/W
HSTDV
1
Host/device (HST_DEV)
0
USB host mode
1
USB device mode
Indicates the mode of the USB controller.
Bits
Access
Mnemonic
Reset
Description
Table 417: Global Control and Status register
FRAME
INTF
CFG
13
12
11
10
9
8
7
6
5
4
3
2
1
0
15
14
31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
30
SPWR
Not used
SYNC
FRAME
RSUM
Not
used
ALT
Not
used