LPC2470_1109 NXP [NXP Semiconductors], LPC2470_1109 Datasheet - Page 78
LPC2470_1109
Manufacturer Part Number
LPC2470_1109
Description
Flashless 16-bit/32-bit microcontroller; Ethernet, CAN, LCD, USB 2.0 device/host/OTG, external memory interface
Manufacturer
NXP [NXP Semiconductors]
Datasheet
1.LPC2470_1109.pdf
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NXP Semiconductors
LPC2470
Product data sheet
Fig 28. LPC2470 USB OTG port configuration: USB port 1 host, USB port 2 host
14.4 Crystal oscillator XTAL input and component selection
LPC24XX
The input voltage to the on-chip oscillators is limited to 1.8 V. If the oscillator is driven by a
clock in slave mode, it is recommended that the input be coupled through a capacitor with
C
capacitor to ground C
slave mode, a minimum of 200 mV (RMS) is needed.
Fig 29. Slave mode operation of the on-chip oscillator
i
= 100 pF. To limit the input voltage to the specified range, choose an additional
USB_UP_LED1
USB_D+1
USB_D−1
USB_PWRD1
USB_OVRCR1
USB_PPWR1
USB_PPWR2
USB_OVRCR2
USB_PWRD2
USB_UP_LED2
USB_D+2
USB_D−2
All information provided in this document is subject to legal disclaimers.
33 Ω
33 Ω
33 Ω
33 Ω
g
Rev. 4 — 8 September 2011
5 V
which attenuates the input voltage by a factor C
15 kΩ
15 kΩ
ENA
ENB
IN
15 kΩ
15 kΩ
V
DD
LM3526-L
V
DD
XTAL1
C i
100 pF
LPC2xxx
FLAGA
OUTA
OUTB
FLAGB
002aae718
Flashless 16-bit/32-bit microcontroller
C g
V
V
SSCORE
SSCORE
V
V
V
V
DD
DD
SSIO,
SSIO,
V
V
BUS
BUS
D+
D−
D+
D−
002aad596
USB-A
connector
USB-A
connector
LPC2470
i
© NXP B.V. 2011. All rights reserved.
/ (C
i
+ C
g
). In
78 of 91
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