LM3S9L71 Datasheet, PDF (915/1275 Pages) Texas Instruments – ARM and Thumb are registered trademarks and Cortex is a trademark

Stellaris^® LM3S9L71 Microcontroller
OTG A /
Host
OTG B /
Device
Register 10: USB Endpoint Index (USBEPIDX), offset 0x00E
Each endpoint's buffer can be accessed by configuring a FIFO size and starting address. The
USBEPIDX 8-bit register is used with the USBTXFIFOSZ, USBRXFIFOSZ, USBTXFIFOADD, and
USBRXFIFOADD registers.
USB Endpoint Index (USBEPIDX)
Base 0x4005.0000
Offset 0x00E
Type R/W, reset 0x00
7
6
5
4
3
2
1
0
reserved
EPIDX
Type RO
RO
RO
RO R/W R/W R/W R/W
Reset 0
0
0
0
0
0
0
0
Bit/Field
7:4
3:0
Name
reserved
EPIDX
Type
RO
R/W
Reset
0x0
0x0
Description
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
Endpoint Index
This bit field configures which endpoint is accessed when reading or
writing to one of the USB controller's indexed registers. A value of 0x0
corresponds to Endpoint 0 and a value of 0xF corresponds to Endpoint
15.
January 21, 2012
915
Texas Instruments-Production Data