Atmel Xplained Evaluation Board AT32UC3A3-XPLD AT32UC3A3-XPLD Data Sheet
Product codes
AT32UC3A3-XPLD
698
32072H–AVR32–10/2012
AT32UC3A3
27.8.2.10
Endpoint n Configuration Register
Register Name:
UECFGn, n in [0..7]
Access Type:
Read/Write
Offset:
0x0100 + (n * 0x04)
Reset Value:
0x00000000
• NBTRANS: Number of transaction per microframe for isochronous endpoint
This field shall be written to the number of transaction per microframe to perform high-bandwidth isochronous transfer
This field can be written only for endpoint that have this capability (see UFEATURES register, ENHBISOn bit). This field is 0
otherwise.
This field is irrelevant for non-isochronous endpoint.
Look at the UFEATURES register to know if the high-bandwidth
isochronous feature is supported by the device.
.
• EPTYPE: Endpoint Type
This field shall be written to select the endpoint type:
This field is cleared upon receiving a USB reset.
31
30
29
28
27
26
25
24
-
-
-
-
-
-
-
-
23
22
21
20
19
18
17
16
-
-
-
-
-
-
-
-
15
14
13
12
11
10
9
8
-
NBTRANS
EPTYPE
-
AUTOSW
EPDIR
7
6
5
4
3
2
1
0
-
EPSIZE
EPBK
ALLOC
-
NBTRANS
Number of transaction
0
0
reserved to endpoint that does not have the high-bandwidth isochronous capability.
0
1
default value: one transaction per micro-frame.
1
0
2 transactions per micro-frame. This endpoint should be configured as double-bank.
1
1
3 transactions per micro-frame. This endpoint should be configured as triple-bank if
supported
supported
)
.
EPTYPE
Endpoint Type
0
0
Control
0
1
Isochronous
1
0
Bulk
1
1
Interrupt