Datasheet

LPC4350_30_20_10 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 4.2 — 18 August 2014 138 of 155
NXP Semiconductors
LPC4350/30/20/10
32-bit ARM Cortex-M4/M0 microcontroller
Remark: If the VBUS function of the USB1 interface is not connected, configure the pin
function for GPIO using the function control bits in the SYSCON block.
Remark: In OTG mode, it is important to be able to detect the VBUS level and to charge
and discharge VBUS. This requires adding active devices that disconnect the link when
VDDIO is not present.
Fig 48. USB interface on a bus-powered device
Fig 49. USB interface for USB operating in OTG mode
REGULATOR
VBUSUSBn_VBUS
LPC43xx
VDDIO
USB-B
connector
USB
aaa-013459
VBUS
USBn_VBUS
LPC43xx
VDDIO
USB-B
connector
USB
aaa-013460
R1
R2
R3
T2
T1