LM3S5739 Datasheet, PDF (690/856 Pages) Texas Instruments – Stellaris® LM3S5739 Microcontroller

Universal Serial Bus (USB) Controller
Host
Device
Register 5: USB Transmit Interrupt Enable (USBTXIE), offset 0x006
USBTXIE is a 16-bit register that provides interrupt enable bits for the interrupts in the USBTXIS
register. When a bit is set, the USB interrupt is asserted to the interrupt controller when the
corresponding interrupt bit in the USBTXIS register is set. When a bit is cleared, the interrupt in the
USBTXIS register is still set but the USB interrupt to the interrupt controller is not asserted. On reset,
the bits corresponding to endpoint 0 and transmit endpoints 1-3 are set to 1, while the remaining
bits are set to 0.
USB Transmit Interrupt Enable (USBTXIE)
Base 0x4005.0000
Offset 0x006
Type R/W, reset 0x000F
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
reserved
EP3
EP2
EP1
EP0
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
Bit/Field
15:4
3
Name
reserved
EP3
Type
RO
R/W
Reset
0x00
1
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.
TX Endpoint 3 Interrupt Enable
Value Description
1 An interrupt is sent to the interrupt controller when the EP3 bit
in the USBTXIS register is set.
0 The EP3 transmit interrupt is suppressed and not sent to the
interrupt controller.
2
EP2
R/W
1
TX Endpoint 2 Interrupt Enable
Same description as EP3.
1
EP1
R/W
1
TX Endpoint 1 Interrupt Enable
Same description as EP3.
0
EP0
R/W
1
TX and RX Endpoint 0 Interrupt Enable
Value Description
1 An interrupt is sent to the interrupt controller when the EP0 bit
in the USBTXIS register is set.
0 The EP0 transmit interrupt is suppressed and not sent to the
interrupt controller.
690
November 17, 2011
Texas Instruments-Production Data