UM10462 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2016. All rights reserved.
User manual Rev. 5.5 — 21 December 2016 228 of 523
NXP Semiconductors
UM10462
Chapter 11: LPC11U3x/2x/1x USB2.0 device controller
11.6.2 USB Info register (INFO)
11.6.3 USB EP Command/Status List start address (EPLISTSTART)
This 32-bit register indicates the start address of the USB EP Command/Status List.
Only a subset of these bits is programmable by software. The 8 least-significant bits are
hardcoded to zero because the list must start on a 256 byte boundary. Bits 31 to 8 can be
programmed by software.
27 - Reserved. 0 RO
28 VBUSDEBOUNCED This bit indicates if Vbus is detected or not. The bit raises
immediately when Vbus becomes high. It drops to zero if Vbus
is low for at least 3 ms. If this bit is high and the DCon bit is set,
the HW will enable the pull-up resistor to signal a connect.
0RO
31:29 - Reserved. 0 RO
Table 214. USB Device Command/Status register (DEVCMDSTAT, address 0x4008 0000) bit description
Bit Symbol Value Description Reset
value
Access
Table 215. USB Info register (INFO, address 0x4008 0004) bit description
Bit Symbol Value Description Reset
value
Access
10:0 FRAME_NR Frame number. This contains the frame number of the last
successfully received SOF. In case no SOF was received by the
device at the beginning of a frame, the frame number returned is
that of the last successfully received SOF. In case the SOF frame
number contained a CRC error, the frame number returned will be
the corrupted frame number as received by the device.
0RO
14:11 ERR_CODE The error code which last occurred: 0 RW
0x0 No error
0x1 PID encoding error
0x2 PID unknown
0x3 Packet unexpected
0x4 Token CRC error
0x5 Data CRC error
0x6 Time out
0x7 Babble
0x8 Truncated EOP
0x9 Sent/Received NAK
0xA Sent Stall
0xB Overrun
0xC Sent empty packet
0xD Bitstuff error
0xE Sync error
0xF Wrong data toggle
15 - Reserved. 0 RO
31:16 - - Reserved - RO
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