LPC2290 datasheet(24/41 Pages) NXP

部件名	LPC2290

功能描述	16/32-bit ARM microcontroller with CAN, 10-bit ADC and external memory interface

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制造商	NXP [NXP Semiconductors]

网页	http://www.nxp.com

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24 / 41 page

LPC2290_3

Product data sheet

Rev. 03 — 16 November 2006

24 of 41

NXP Semiconductors

LPC2290

16/32-bit ARM microcontroller with external memory interface

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 VDD ramp (in the case of power-on), the type 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.

6.18.4 External interrupt inputs

The LPC2290 include up to nine edge or level sensitive External Interrupt Inputs as

selectable pin functions. When the pins are combined, external events can be processed

as four independent interrupt signals. The External Interrupt Inputs can optionally be used

to wake up the processor from Power-down mode.

6.18.5 Memory mapping control

The Memory Mapping Control alters the mapping of the interrupt vectors that appear

beginning at address 0x0000 0000. Vectors may be mapped to the bottom of the on-chip

ﬂash memory, or to the on-chip static RAM. This allows code running in different memory

spaces to have control of the interrupts.

6.18.6 Power control

The LPC2290 support two reduced power modes: Idle mode and Power-down mode. In

Idle mode, execution of instructions is suspended until either a reset or interrupt occurs.

Peripheral functions continue operation during Idle mode and may generate interrupts to

cause the processor to resume execution. Idle mode eliminates power used by the

processor itself, memory systems and related controllers, and internal buses.

In Power-down mode, the oscillator is shut down and the chip receives no internal clocks.

The processor state and registers, peripheral registers, and internal SRAM values are

preserved throughout Power-down mode and the logic levels of chip output pins remain

static. The Power-down mode can be terminated and normal operation resumed by either

a reset or certain speciﬁc interrupts that are able to function without clocks. Since all

dynamic operation of the chip is suspended, Power-down mode reduces chip power

consumption to nearly zero.

A Power Control for Peripherals feature allows individual peripherals to be turned off if

they are not needed in the application, resulting in additional power savings.

6.18.7 APB bus

The APB divider determines the relationship between the processor clock (CCLK) and the

clock used by peripheral devices (PCLK). The APB divider serves two purposes. The ﬁrst

is to provide peripherals with the desired PCLK via APB bus so that they can operate at

the speed chosen for the ARM processor. In order to achieve this, the APB bus may be

slowed down to 1

⁄

2 to

1

⁄

4 of the processor clock rate. Because the APB bus must work

properly at power-up (and its timing cannot be altered if it does not work since the APB

divider control registers reside on the APB bus), the default condition at reset is for the

APB bus to run at 1

⁄

4 of the processor clock rate. The second purpose of the APB divider

is to allow power savings when an application does not require any peripherals to run at

the full processor rate. Because the APB divider is connected to the PLL output, the PLL

remains active (if it was running) during Idle mode.

类似零件编号 - LPC2290

制造商	部件名	数据表	功能描述
NXP Semiconductors	LPC2290	185Kb / 41P	16/32-bit ARM microcontrollers with CAN, 10-bit ADC and external memory interface Rev. 01-09 February 2004
	LPC2290FBD144	185Kb / 41P	16/32-bit ARM microcontrollers with CAN, 10-bit ADC and external memory interface Rev. 01-09 February 2004
	LPC2290	210Kb / 41P	16/32-bit ARM microcontroller with CAN, 10-bit ADC and external memory interface Rev. 03-16 November 2006

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类似说明 - LPC2290

制造商	部件名	数据表	功能描述
NXP Semiconductors	LPC2290	210Kb / 41P	16/32-bit ARM microcontroller with CAN, 10-bit ADC and external memory interface Rev. 03-16 November 2006
	LPC2210	181Kb / 39P	16/32-bit ARM microcontroller with 10-bit ADC and external memory interface Rev. 01-09 February 2004
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	LPC2210	258Kb / 50P	16/32-bit ARM microcontrollers; flashless, with 10-bit ADC and external memory interface Rev. 06-11 December 2008
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	LPC2220	255Kb / 49P	16/32-bit ARM microcontrollers; flashless with 64 kB, with 10-bit ADC and external memory interface Rev. 02-30 May 2005
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	LPC2292	273Kb / 54P	16/32-bit ARM microcontrollers; 256 kB ISP/IAP flash with CAN, 10-bit ADC and external memory interface Rev. 06-10 December 2007
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LPC2290 数据表(PDF) 24 Page - NXP Semiconductors

LPC2290 数据表(HTML) 24 Page - NXP Semiconductors

类似零件编号 - LPC2290

类似说明 - LPC2290

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LPC2290 数据表(PDF) 24 Page - NXP Semiconductors

LPC2290 数据表(HTML) 24 Page - NXP Semiconductors

类似零件编号 - LPC2290

类似说明 - LPC2290

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