Datasheet

LPC178X_7X All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 5 — 9 September 2014 98 of 122
NXP Semiconductors
LPC178x/7x
32-bit ARM Cortex-M3 microcontroller
14. Application information
14.1 Suggested USB interface solutions
Remark: The USB controller is available as a device/Host/OTG controller on parts
LPC1788/87/86/85 and LPC1778/77/76 and as device-only controller on parts LPC1774.
Fig 30. USB interface on a self-powered device
LPC17xx
USB-B
connector
USB_D+
USB_CONNECT
SoftConnect switch
USB_D−
V
BUS
V
SS
V
DD(3V3)
R1
1.5 kΩ
R
S
= 33 Ω
002aad939
R
S
= 33 Ω
USB_UP_LED
Fig 31. USB interface on a bus-powered device
LPC17xx
V
DD(3V3)
R1
1.5 kΩ
R2
USB_UP_LED
002aad940
USB-B
connector
USB_D+
USB_D−
V
BUS
V
SS
R
S
= 33 Ω
R
S
= 33 Ω