Datasheet

1115
SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
39.6.2.10 Device Endpoint x Configuration Register
Name: UOTGHS_DEVEPTCFGx [x=0..9]
Address: 0x400AC100
Access: Read-write
• 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 UOTGHS_FEATURES.ENHBISOx bit). This field is
0 otherwise.
This field is irrelevant for non-isochronous endpoint.
• EPTYPE: Endpoint Type
This field shall be written to select the endpoint type:
This field is cleared upon receiving a USB reset.
• AUTOSW: Automatic Switch
This bit is cleared upon receiving a USB reset.
0: The automatic bank switching is disabled.
1: The automatic bank switching is enabled.
• EPDIR: Endpoint Direction
This bit is cleared upon receiving a USB reset.
0 (OUT): The endpoint direction is OUT.
1 (IN): The endpoint direction is IN (nor for control endpoints).
31 30 29 28 27 26 25 24
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23 22 21 20 19 18 17 16
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15 14 13 12 11 10 9 8
– NBTRANS EPTYPE – AUTOSW EPDIR
76543210
– EPSIZE EPBK ALLOC –
Value Name Description
0 0_TRANS reserved to endpoint that does not have the high-bandwidth isochronous capability.
1 1_TRANS default value: one transaction per micro-frame.
2 2_TRANS 2 transactions per micro-frame. This endpoint should be configured as double-bank.
3 3_TRANS 3 transactions per micro-frame. This endpoint should be configured as triple-bank.
Value Name Description
0 CTRL Control
1 ISO Isochronous
2BLKBulk
3 INTRPT Interrupt