GigaDevice Semiconductor GD32VF103 - Page 505

GD32VF103 User Manual
505
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
CEN
CDIS
ODDFRM
DAR[6:0]
Reserved
EPTYPE[1:0]
LSD
Reserved
rs
rs
rw
rw
rw
rw
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
EPDIR
EPNUM[3:0]
MPL[10:0]
rw
rw
rw
Bits
Fields
Descriptions
31
CEN
Channel enable
Set by the application and cleared by USBFS.
0: Channel disabled
1: Channel enabled
Software should following the operation guide to disable or enable a channel.
30
CDIS
Channel disable
Software can set this bit to disable the channel from processing transactions.
Software should follow the operation guide to disable or enable a channel.
29
ODDFRM
Odd frame
For periodic transfers (interrupt or isochronous transfer), this bit controls that
whether in an odd frame or even frame this channel’s transaction is desired to be
processed.
0: Even frame
1: Odd frame
28:22
DAR[6:0]
Device address
The address of the USB device that this channel wants to communicate with.
21:20
Reserved
Must be kept at reset value
19:18
EPTYPE[1:0]
Endpoint type
The transfer type of the endpoint that this channel wants to communicate with.
00: Control
01: Isochronous
10: Bulk
11: Interrupt
17
LSD
Low-Speed device
The device that this channel wants to communicate with is a Low-Speed Device.
16
Reserved
Must be kept at reset value