LM3S5739 Datasheet, PDF (689/856 Pages) Texas Instruments – Stellaris® LM3S5739 Microcontroller

Stellaris® LM3S5739 Microcontroller
Register 4: USB Receive Interrupt Status (USBRXIS), offset 0x004
Important: This register is read-sensitive. See the register description for details.
Host
Device
USBRXIS is a 16-bit read-only register that indicates which of the interrupts for receive endpoints
1–3 are currently active.
Note: Bits relating to endpoints that have not been configured always return 0. Note also that all
active interrupts are cleared when this register is read.
USB Receive Interrupt Status (USBRXIS)
Base 0x4005.0000
Offset 0x004
Type RO, reset 0x0000
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
reserved
EP3
EP2
EP1
reserved
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
15:4
3
Name
reserved
EP3
Type
RO
RO
Reset
0x00
0
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.
RX Endpoint 3 Interrupt
Value Description
0 No interrupt.
1 The Endpoint 3 receive interrupt is asserted.
2
EP2
RO
0
RX Endpoint 2 Interrupt
Same description as EP3.
1
EP1
RO
0
RX Endpoint 1 Interrupt
Same description as EP3.
0
reserved
RO
0
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.
November 17, 2011
689
Texas Instruments-Production Data