ISD94100 Series Technical Reference Manual
Sep 9, 2019
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6.18.7 Register Description
USB Interrupt Enable Register (USBD_INTEN)
Register
Offset
R/W Description
Reset Value
USBD_INTEN
0x000
R/W USB Device Interrupt Enable Register
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
INNAKEN
Reserved
WKEN
7
6
5
4
3
2
1
0
Reserved
SOFIEN
NEVWKIEN
VBDETIEN
USBIEN
BUSIEN
Bits
Description
[31:16]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[15]
INNAKEN
Active NAK Function and Its Status in IN Token
0 = When device responds NAK after receiving IN token, IN NAK status will not be updated
to USBD_EPSTS0 and USBD_EPSTS1, so that the USB interrupt event will not be
asserted.
1 = IN NAK status will be updated to USBD_EPSTS0 and USBD_EPSTS1 and the USB
interrupt event will be asserted, when the device responds NAK after receiving IN token.
[14:9]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[8]
WKEN
Wake-up Function Enable Bit
0 = USB wake-up function Disabled.
1 = USB wake-up function Enabled.
[7:5]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[4]
SOFIEN
Start of Frame Interrupt Enable Bit
0 = SOF Interrupt Disabled.
1 = SOF Interrupt Enabled.
[3]
NEVWKIEN
USB No-event-wake-up Interrupt Enable Bit
0 = No-event-wake-up Interrupt Disabled.
1 = No-event-wake-up Interrupt Enabled.
[2]
VBDETIEN
VBUS Detection Interrupt Enable Bit
0 = VBUS detection Interrupt Disabled.
1 = VBUS detection Interrupt Enabled.