LPC2361_62 NXP Semiconductors, LPC2361_62 Datasheet - Page 52

• Manufacturer Part Number: LPC2361_62
• Description: The LPC2361/2362 microcontrollers are based on a 16-bit/32-bit ARM7TDMI-S CPU with real-time emulation that combines the microcontroller with up to 128 kB of embedded high-speed flash memory
• Manufacturer: NXP Semiconductors

NXP Semiconductors
LPC2361_62
Product data sheet
Fig 21. LPC2361/2362 USB device port configuration
LPC2361/62
14.2 Crystal oscillator XTAL input and component selection
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.
In slave mode the input clock signal should be coupled by means of a capacitor of 100 pF
(Figure
corresponds to a square wave signal with a signal swing of between 280 mV and 1.4 V.
The XTAL2 pin in this configuration can be left unconnected.
External components and models used in oscillation mode are shown in
Table 15
and the capacitances C
fundamental mode oscillation (the fundamental frequency is represented by L, C
R
not be larger than 7 pF. Parameters F
manufacturer.
Fig 22. Slave mode operation of the on-chip oscillator
i
S
= 100 pF. To limit the input voltage to the specified range, choose an additional
). Capacitance C
USB_UP_LED
USB_CONNECT
USB_D+
USB_D−
V
BUS
22), with an amplitude between 200 mV (RMS) and 1000 mV (RMS). This
and
Table
All information provided in this document is subject to legal disclaimers.
33 Ω
33 Ω
P
16. Since the feedback resistance is integrated on chip, only a crystal
in
g
Rev. 5 — 25 October 2011
V
which attenuates the input voltage by a factor C
Figure 23
X1
DD
and C
V
DD
X2
represents the parallel package capacitance and should
need to be connected externally in case of
OSC
XTAL1
C i
100 pF
LPC2xxx
, C
L
, R
S
002aae718
C g
and C
P
are supplied by the crystal
Single-chip 16-bit/32-bit MCU
V
SS
V
BUS
D+
D−
LPC2361/62
002aad968
USB-B
connector
i
© NXP B.V. 2011. All rights reserved.
/ (C
Figure 23
i
+ C
g
L
). In
and
and in
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