LPC2460FET208,551 NXP Semiconductors, LPC2460FET208,551 Datasheet - Page 67
LPC2460FET208,551
Manufacturer Part Number
LPC2460FET208,551
Description
IC ARM7 MCU ROMLESS 208TFBGA
Manufacturer
NXP Semiconductors
Series
LPC2400r
Specifications of LPC2460FET208,551
Program Memory Type
ROMless
Package / Case
208-TFBGA
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, POR, PWM, WDT
Number Of I /o
160
Ram Size
96K 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
Operating Supply Voltage
3.3 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
MDK-ARM, RL-ARM, ULINK2, MCB2460, MCB2460U
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
On-chip Dac
1-ch x 10-bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
MCB2400U - BOARD EVAL MCB2400 + ULINK2MCB2400 - BOARD EVAL FOR NXP LPC246X SER
Eeprom Size
-
Program Memory Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
568-4260
935283232551
LPC2460FET208-S
935283232551
LPC2460FET208-S
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LPC2460FET208,551
Manufacturer:
NXP Semiconductors
Quantity:
10 000
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5. Wakeup timer
UM10237_4
User manual
The LPC2400 begins operation at power-up and when awakened from Power-down mode
by using the 4 MHz IRC oscillator as the clock source. This allows chip operation quickly
in these cases. If the main oscillator or the PLL is needed by the application, software will
need to enable these features and wait for them to stabilize before they are used as a
clock source.
When the main oscillator is initially activated, the wakeup timer allows software to ensure
that the main oscillator is fully functional before the processor uses it as a clock source
and starts to execute instructions. This is important at power-on, all types of Reset, and
whenever any of the aforementioned functions are turned off for any reason. Since the
oscillator and other functions are turned off during Power-down mode, any wakeup of the
processor from Power-down mode makes use of the Wakeup Timer.
The Wakeup Timer monitors the crystal oscillator as the means of checking whether it is
safe to begin code execution. When power is applied to the chip, or some event caused
the chip to exit Power-down mode, some time is required for the oscillator to produce a
signal of sufficient amplitude to drive the clock logic. The amount of time depends on
many factors, including the rate of V
crystal and its electrical characteristics (if a quartz crystal is used), as well as any other
external circuitry (e.g. capacitors), and the characteristics of the oscillator itself under the
existing ambient conditions.
Once a clock is detected, the Wakeup Timer counts a fixed number of clocks (4096), then
sets the flag (OSCSTAT bit in the SCS register) that indicates that the main oscillator is
ready for use. Software can then switch to the main oscillator and, if needed, start the
PLL. Refer to the Main Oscillator description in this chapter for details.
Rev. 04 — 26 August 2009
DD(3V3)
Chapter 4: LPC24XX Clocking and power control
ramp (in the case of power on), the type of
UM10237
© NXP B.V. 2009. All rights reserved.
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