LPC11E11FHN33 NXP Semiconductors, LPC11E11FHN33 Datasheet - Page 47

• Manufacturer Part Number: LPC11E11FHN33
• Description: The LPC11E1x are an ARM Cortex-M0 based, low-cost 32-bit MCU family, designed for 8/16-bit microcontroller applications, offering performance, low power, simple instruction set and memory addressing together with reduced code size compared to existin
• Manufacturer: NXP Semiconductors

NXP Semiconductors
11. Application information
LPC11E1X
Product data sheet
11.1 XTAL input
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
mode, a minimum of 200 mV(RMS) is needed.
In slave mode, couple the input clock signal with a capacitor of 100 pF
amplitude between 200 mV(RMS) and 1000 mV(RMS). This signal corresponds to a
square wave signal with a signal swing of between 280 mV and 1.4 V. The XTALOUT pin
in this configuration can be left unconnected.
External components and models used in oscillation mode are shown in
Table 17
and the capacitances C
fundamental mode oscillation (L, C
Capacitance C
larger than 7 pF. Parameters F
manufacturer.
Fig 25. Slave mode operation of the on-chip oscillator
i
= 100 pF. To limit the input voltage to the specified range, choose an additional
and
Table
P
All information provided in this document is subject to legal disclaimers.
in
Figure 26
18. Since the feedback resistance is integrated on chip, only a crystal
g
Rev. 1 — 20 February 2012
which attenuates the input voltage by a factor C
X1
and C
represents the parallel package capacitance and must not be
OSC
X2
, C
L
need to be connected externally in case of
and R
L
, R
XTALIN
LPC1xxx
C i
100 pF
S
S
and C
represent the fundamental frequency).
002aae788
32-bit ARM Cortex-M0 microcontroller
P
C g
are supplied by the crystal
LPC11E1x
(Figure
i
/(C
© NXP B.V. 2012. All rights reserved.
Figure 26
i
+ C
25), with an
g
). In slave
and in
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