Datasheet

LPC2388_0 © NXP B.V. 2007. All rights reserved.
Preliminary data sheet Rev. 00.01 — 23 October 2007 47 of 57
NXP Semiconductors
LPC2388
Fast communication chip
11. Application information
11.1 Suggested USB interface solutions
Fig 9. LPC2388 USB interface on a self-powered device
LPC23XX
USB-B
connector
USB_D+
USB_CONNECT
soft-connect switch
USB_D−
V
BUS
V
SS
V
DD(3V3)
R1
1.5 kΩ
R
S
= 33 Ω
002aac578
R
S
= 33 Ω
USB_UP_LED
Fig 10. LPC2388 USB interface on a bus-powered device
LPC23XX
V
DD(3V3)
R1
1.5 kΩ
R2
USB_UP_LED
002aac579
USB-B
connector
USB_D+
USB_D−
V
BUS
V
SS
R
S
= 33 Ω
R
S
= 33 Ω