UM10237_2 © NXP B.V. 2008. All rights reserved.
User manual Rev. 02 — 19 December 2008 396 o f 792
NXP Semiconductors UM10237
Chapter 15: LPC24XX USB OTG controller
1. Use the internal USB transceiver for USB signalling and use the external OTG transceiver for OTG functionality only (see Figure 15–53). This option uses the internal transceiver in VP/VM mode.2. Use the external OTG transceiver in VP/VM mode for OTG functionality and USB signalling (see Figure 15–54).In both cases port U2 is connected as a host. Solution one uses fewer pins.

Fig 53. USB OTG port configuration: port U1 OTG Dual-Role device, port U2 host

USB_UP_LED1
USB_D+1
USB_D1
USB_PWRD2
USB_SDA1
USB_SCL1
RSTOUT
15
kΩ15
kΩ
LPC24XX
USB-A
connector
Mini-AB
connector
33 Ω
33 Ω
33 Ω
33 Ω
VDD
VDD
VDD
USB_UP_LED2
VDD
USB_OVRCR2
LM3526-L
ENA
IN
5 V
OUTA
FLAGA
VDD
D+
D
VBUS
USB_PPWR2
USB_D+2
USB_D2
002aac708
R7
R4 R5 R6
R1 R2 R3 R4
R8
USB_INT1
RESET_N
ADR/PSW
SPEED
SUSPEND
OE_N/INT_N
SCL
SDA
INT_N
VBUS
ID
DP
DM
ISP1301 VSS
VSS