NXP Semiconductors LPC24XX UM10237 - Manual (Page 364)

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User manual Rev. 04 — 26 August 2009 364 of 792
NXP Semiconductors
UM10237
Chapter 13: LPC24XX USB device controller
11.1 Set Address (Command: 0xD0, Data: write 1 byte)
The Set Address command is used to set the USB assigned address and enable the
(embedded) function. The address set in the device will take effect after the status stage
of the control transaction. After a bus reset, DEV_ADDR is set to 0x00, and DEV_EN is
set to 1. The device will respond to packets for function address 0x00, endpoint 0 (default
endpoint).
11.2 Configure Device (Command: 0xD8, Data: write 1 byte)
A value of 1 written to the register indicates that the device is configured and all the
enabled non-control endpoints will respond. Control endpoints are always enabled and
respond even if the device is not configured, in the default state.
Table 347. SIE command code table
Command name Recipient Code (Hex) Data phase
Device commands
Set Address Device D0 Write 1 byte
Configure Device Device D8 Write 1 byte
Set Mode Device F3 Write 1 byte
Read Current Frame Number Device F5 Read 1 or 2 bytes
Read Test Register Device FD Read 2 bytes
Set Device Status Device FE Write 1 byte
Get Device Status Device FE Read 1 byte
Get Error Code Device FF Read 1 byte
Read Error Status Device FB Read 1 byte
Endpoint Commands
Select Endpoint Endpoint 0 00 Read 1 byte (optional)
Endpoint 1 01 Read 1 byte (optional)
Endpoint xx xx Read 1 byte (optional)
Select Endpoint/Clear Interrupt Endpoint 0 40 Read 1 byte
Endpoint 1 41 Read 1 byte
Endpoint xx xx
+ 40
Read 1 byte
Set Endpoint Status Endpoint 0 40 Write 1 byte
Endpoint 1 41 Write 1 byte
Endpoint xx xx
+ 40
Write 1 byte
Clear Buffer Selected Endpoint F2 Read 1 byte (optional)
Validate Buffer Selected Endpoint FA None
Table 348. Device Set Address Register bit description
Bit Symbol Description Reset value
6:0 DEV_ADDR Device address set by the software. After a bus reset this field is set to
0x00. 0x00
7 DEV_EN Device Enable. After a bus reset this bit is set to 1.
0: Device will not respond to any packets.
1: Device will respond to packets for function address DEV_ADDR.
0