LPC2470FBD208,551 NXP Semiconductors, LPC2470FBD208,551 Datasheet - Page 43
![IC ARM7 MCU LCD 208-LQFP](/photos/12/13/121391/208-lqfp_sot459-1_pkg_sml.jpg)
LPC2470FBD208,551
Manufacturer Part Number
LPC2470FBD208,551
Description
IC ARM7 MCU LCD 208-LQFP
Manufacturer
NXP Semiconductors
Series
LPC2400r
Datasheets
1.OM11077.pdf
(792 pages)
2.LPC2470FET208551.pdf
(89 pages)
3.LPC2470FET208551.pdf
(91 pages)
Specifications of LPC2470FBD208,551
Package / Case
208-LQFP
Core Processor
ARM7
Core Size
16/32-Bit
Speed
72MHz
Connectivity
CAN, EBI/EMI, Ethernet, I²C, Microwire, MMC, SPI, SSI, SSP, UART/USART, USB OTG
Peripherals
Brown-out Detect/Reset, DMA, I²S, LCD, POR, PWM, WDT
Number Of I /o
160
Program Memory Type
ROMless
Ram Size
98K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
LPC24
Core
ARM7TDMI-S
Data Bus Width
16 bit, 32 bit
Data Ram Size
98 KB
Interface Type
CAN/I2C/I2S/SPI/SSP/UART/USB
Maximum Clock Frequency
72 MHz
Number Of Programmable I/os
160
Number Of Timers
4
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
MDK-ARM, RL-ARM, ULINK2, MCB2470U
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
On-chip Dac
1-ch x 10-bit
Package
208LQFP
Device Core
ARM7TDMI-S
Family Name
LPC2000
Maximum Speed
72 MHz
Operating Supply Voltage
3.3 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
568-4361-5
935284068551
LPC2470FBD208-S
935284068551
LPC2470FBD208-S
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LPC2470FBD208,551
Manufacturer:
NXP Semiconductors
Quantity:
10 000
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NXP Semiconductors
2. Oscillators
UM10237_4
User manual
2.1 Internal RC oscillator
2.2 Main oscillator
The LPC2400 includes three independent oscillators. These are the Main Oscillator, the
Internal RC Oscillator, and the RTC oscillator. Each oscillator can be used for more than
one purpose as required in a particular application.
Following Reset, the LPC2400 will operate from the Internal RC Oscillator until switched
by software. This allows systems to operate without any external crystal, and allows the
Boot Loader code to operate at a known frequency. When Boot Block will branch to a user
program, there could be an option to activate the main oscillator prior to entering user
code.
The Internal RC Oscillator (IRC) may be used as the clock source for the watchdog timer,
and/or as the clock that drives the PLL and subsequently the CPU. The precision of the
IRC does not allow for use of the USB interface, which requires a much more precise time
base. Also, do not use the IRC for the CAN1/2 block if the CAN baud rate is higher than
100 kbit/s.The nominal IRC frequency is 4 MHz.
Upon power up or any chip reset, the LPC2400 uses the IRC as the clock source.
Software may later switch to one of the other available clock sources.
The main oscillator can be used as the clock source for the CPU, with or without using the
PLL. The main oscillator operates at frequencies of 1 MHz to 24 MHz. This frequency can
be boosted to a higher frequency, up to the maximum CPU operating frequency, by the
PLL. The oscillator output is called oscclk. The clock selected as the PLL input is pllclkin
and the ARM processor clock frequency is referred to as cclk for purposes of rate
equations, etc. elsewhere in this document. The frequencies of pllclkin and cclk are the
same value unless the PLL is active and connected. Refer to the PLL description in this
chapter for details.
The onboard oscillator in the LPC24xx can operate in one of two modes: slave mode and
oscillation mode.
In slave mode the input clock signal should be coupled by means of a capacitor of 100 pF
(C
in this configuration can be left not connected.
External components and models used in oscillation mode are shown in
drawings b and c, and in
integrated on chip, only a crystal and the capacitances C
externally in case of fundamental mode oscillation (the fundamental frequency is
represented by L, C
parallel package capacitance and should not be larger than 7 pF. Parameters F
and C
i
in
Figure
P
are supplied by the crystal manufacturer.
4–13, drawing a), with an amplitude of at least 200 mV(RMS). The XTAL2 pin
L
and R
Rev. 04 — 26 August 2009
Table 4–39
S
). Capacitance C
and
Chapter 4: LPC24XX Clocking and power control
Table
P
in
4–40. Since the feedback resistance is
Figure
X1
4–13, drawing c, represents the
and C
X2
need to be connected
UM10237
© NXP B.V. 2009. All rights reserved.
Figure
C
4–13,
, C
43 of 792
L
, R
S
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