EA-OEM-204 Embedded Artists, EA-OEM-204 Datasheet - Page 80

• Manufacturer Part Number: EA-OEM-204
• Description: MCU, MPU & DSP Development Tools LPC2478-16 OEM BRD OEM BASE BRD W/TOUCH
• Manufacturer: Embedded Artists

Specifications of EA-OEM-204

• Processor To Be Evaluated: LPC2478
• Data Bus Width: 16 bit
• Interface Type: RS-232, Ethernet, USB, I2C, SPI, UART
• Core: ARM7TDMI-S
• Dimensions: 240 mm x 150 mm
• Maximum Operating Temperature: + 85 C
• Operating Supply Voltage: 3.3 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NXP Semiconductors
LPC2478
Product data sheet
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 XTALOUT pin in this configuration can be left unconnected.
External components and models used in oscillation mode are shown in
Table 21
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.
Table 21.
Fundamental oscillation
frequency F
1 MHz to 5 MHz
5 MHz to 10 MHz
10 MHz to 15 MHz
15 MHz to 20 MHz
Fig 28. Oscillator modes and models: oscillation mode of operation and external crystal
S
). Capacitance C
27), with an amplitude between 200 mV (RMS) and 1000 mV (RMS). This
and
model used for C
Recommended values for C
components parameters): low frequency mode
OSC
Table
All information provided in this document is subject to legal disclaimers.
XTALIN
P
C X1
22. Since the feedback resistance is integrated on chip, only a crystal
LPC2xxx
in
Rev. 2 — 29 September 2010
Figure 28
X1
XTAL
X1
and C
Crystal load
capacitance C
10 pF
20 pF
30 pF
10 pF
20 pF
30 pF
10 pF
20 pF
10 pF
/C
X2
XTALOUT
X2
evaluation
C X2
represents the parallel package capacitance and should
need to be connected externally in case of
OSC
X1
/C
L
, C
X2
in oscillation mode (crystal and external
L
Maximum crystal
series resistance R
< 300 Ω
< 300 Ω
< 300 Ω
< 300 Ω
< 200 Ω
< 100 Ω
< 160 Ω
< 60 Ω
< 80 Ω
, R
Single-chip 16-bit/32-bit microcontroller
S
and C
=
P
are supplied by the crystal
S
L
C L
R S
External load
capacitors C
18 pF, 18 pF
39 pF, 39 pF
57 pF, 57 pF
18 pF, 18 pF
39 pF, 39 pF
57 pF, 57 pF
18 pF, 18 pF
39 pF, 39 pF
18 pF, 18 pF
002aaf494
LPC2478
© NXP B.V. 2010. All rights reserved.
C P
Figure 28
L
X1
and
/C
and in
80 of 91
X2