LPC1767FBD100,551 NXP Semiconductors, LPC1767FBD100,551 Datasheet - Page 65
LPC1767FBD100,551
Manufacturer Part Number
LPC1767FBD100,551
Description
IC ARM CORTEX MCU 512K 100-LQFP
Manufacturer
NXP Semiconductors
Series
LPC17xxr
Datasheets
1.LPC1767FBD100551.pdf
(2 pages)
2.LPC1767FBD100551.pdf
(840 pages)
3.LPC1767FBD100551.pdf
(65 pages)
Specifications of LPC1767FBD100,551
Core Processor
ARM® Cortex-M3™
Core Size
32-Bit
Speed
100MHz
Connectivity
Ethernet, I²C, IrDA, Microwire, SPI, SSI, UART/USART
Peripherals
Brown-out Detect/Reset, DMA, I²S, Motor Control PWM, POR, PWM, WDT
Number Of I /o
70
Program Memory Size
512KB (512K x 8)
Program Memory Type
FLASH
Ram Size
64K x 8
Voltage - Supply (vcc/vdd)
2.4 V ~ 3.6 V
Data Converters
A/D 8x12b, D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-LQFP
Processor Series
LPC17
Core
ARM Cortex M3
3rd Party Development Tools
MDK-ARM, RL-ARM, ULINK2, MCB1760, MCB1760U, MCB1760UME
For Use With
622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Other names
568-4967
935289808551
935289808551
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LPC1767FBD100,551
Manufacturer:
NXP Semiconductors
Quantity:
10 000
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NXP Semiconductors
4.9 Wake-up timer
UM10360
User manual
The LPC17xx 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 to begin
quickly. If the main oscillator or one or both PLLs are 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 wake-up 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 wake-up of the
processor from Power-down mode makes use of the Wake-up Timer.
The Wake-up 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
of 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 Wake-up Timer counts a fixed number of clocks (4,096),
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 start any required
PLLs. Refer to the Main Oscillator description in this chapter for details.
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 19 August 2010
DD(REG)(3V3)
Chapter 4: LPC17xx Clocking and power control
ramp (in the case of power on), the type
UM10360
© NXP B.V. 2010. All rights reserved.
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