The LPC1759 is a Cortex-M3 microcontroller for embedded applications featuring a high level of integration and low power consumption at frequencies of 120 MHz

LPC1759FBD80

Manufacturer Part NumberLPC1759FBD80
DescriptionThe LPC1759 is a Cortex-M3 microcontroller for embedded applications featuring a high level of integration and low power consumption at frequencies of 120 MHz
ManufacturerNXP Semiconductors
LPC1759FBD80 datasheet
 


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NXP Semiconductors
Fig 33. Oscillator modes and models: oscillation mode of operation and external crystal
Table 21.
Fundamental oscillation
frequency F
1 MHz - 5 MHz
5 MHz - 10 MHz
10 MHz - 15 MHz
15 MHz - 20 MHz
Table 22.
Fundamental oscillation
frequency F
15 MHz - 20 MHz
20 MHz - 25 MHz
14.3 XTAL Printed-Circuit Board (PCB) layout guidelines
The crystal should be connected on the PCB as close as possible to the oscillator input
and output pins of the chip. Take care that the load capacitors C
third overtone crystal usage have a common ground plane. The external components
must also be connected to the ground plain. Loops must be made as small as possible in
LPC1759_58_56_54_52_51
Product data sheet
LPC1759/58/56/54/52/51
LPC1xxx
XTALIN
XTALOUT
XTAL
C X1
C X2
model used for C
/C
evaluation
X1
X2
Recommended values for C
X1
components parameters): low frequency mode
Crystal load
capacitance C
OSC
10 pF
20 pF
30 pF
10 pF
20 pF
30 pF
10 pF
20 pF
10 pF
Recommended values for C
X1
components parameters): high frequency mode
Crystal load
capacitance C
OSC
10 pF
20 pF
10 pF
20 pF
All information provided in this document is subject to legal disclaimers.
Rev. 7 — 29 March 2011
32-bit ARM Cortex-M3 microcontroller
L
=
C L
R S
002aaf424
/C
in oscillation mode (crystal and external
X2
Maximum crystal
External load
series resistance R
capacitors C
L
S
< 300 
18 pF, 18 pF
< 300 
39 pF, 39 pF
< 300 
57 pF, 57 pF
< 300 
18 pF, 18 pF
< 200 
39 pF, 39 pF
< 100 
57 pF, 57 pF
< 160 
18 pF, 18 pF
< 60 
39 pF, 39 pF
< 80 
18 pF, 18 pF
/C
in oscillation mode (crystal and external
X2
Maximum crystal
External load
series resistance R
capacitors C
L
S
< 180 
18 pF, 18 pF
< 100 
39 pF, 39 pF
< 160 
18 pF, 18 pF
< 80 
39 pF, 39 pF
, C
x1
x2
C P
/C
X1
X2
,
X1
CX2
, and C
in case of
x3
© NXP B.V. 2011. All rights reserved.
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