UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
556 of 1269
NXP Semiconductors
UM10503
Chapter 23: LPC43xx USB0 Host/Device/OTG controller
23.9.1.1 Endpoint capabilities and characteristics descriptor fields
This DWord specifies static information about the endpoint, in other words, this
information does not change over the lifetime of the endpoint. The device controller
software should not attempt to modify this information while the corresponding endpoint is
enabled.
Fig 56. Endpoint queue head data structure
ENDPOINT CAPABILITIES/CHARACTERISTICS
BUFFER POINTER PAGE 0
BUFFER POINTER PAGE 1
BUFFER POINTER PAGE 2
BUFFER POINTER PAGE 3
BUFFER POINTER PAGE 4
RESERVED
SET-UP BUFFER: BYTES 3:0
SET-UP BUFFER: BYTES 7:4
Total_bytes
IOC
MulO
STATUS
CURRENT dTD POINTER
NEXT dTD POINTER
CURR_OFFS
BUFFER POINTER PAGE 0
BUFFER POINTER PAGE 1
BUFFER POINTER PAGE 2
BUFFER POINTER PAGE 3
BUFFER POINTER PAGE 4
Total_bytes
IOC
MulO
STATUS
CURR_OFFS
FRAME_N
device Queue Head (dQH)
endpoint transfer descriptor (dTD)
transfer overlay
T
NEXT dTD POINTER
T
31
bit
0
offset
0x00
0x04
0x08
0x0C
0x10
0x14
0x18
0x1C
0x20
0x24
0x28
0x2C