LPC2468FBD208,551 NXP Semiconductors, LPC2468FBD208,551 Datasheet - Page 659

IC ARM7 MCU FLASH 512K 208-LQFP

LPC2468FBD208,551

Manufacturer Part Number

LPC2468FBD208,551

Description

IC ARM7 MCU FLASH 512K 208-LQFP

Manufacturer

NXP Semiconductors

Series

LPC2400r

Datasheets

1.OM11077.pdf (792 pages)

2.LPC2468FBD208551.pdf (85 pages)

Specifications of LPC2468FBD208,551

Program Memory Type

FLASH

Program Memory Size

512KB (512K x 8)

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, POR, PWM, WDT

Number Of I /o

160

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/I2S/ISP/SSP/UART/USB

Maximum Clock Frequency

72 MHz

Number Of Programmable I/os

160

Number Of Timers

6

Operating Supply Voltage

3.3 V

Maximum Operating Temperature

+ 85 C

Mounting Style

SMD/SMT

3rd Party Development Tools

MDK-ARM, RL-ARM, ULINK2, IRD-LPC2468-DEV, SAB-TFBGA208, KSK-LPC2468-PL

Development Tools By Supplier

OM10100

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

622-1025 - KIT DEV IND REF DESIGN LPC2468622-1024 - BOARD SCKT ADAPTER FOR TFBGA208568-4358 - DISPLAY QVGA TFT FOR OM10100568-4309 - BOARD EXTENSION LPCSTICK568-4308 - EVAL LPC-STICK WITH LPC2468MCB2400U - BOARD EVAL MCB2400 + ULINK2MCB2400 - BOARD EVAL FOR NXP LPC246X SER622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K

Eeprom Size

-

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

Other names

568-4261
935282457551
LPC2468FBD208-S

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Bonase Electronics (HK) Co., Limited

Part Number:

LPC2468FBD208,551

Quantity:

9 999

Company:

Bonase Electronics (HK) Co., Limited

Bonase Electronics (HK) Co., Limited

Part Number:

LPC2468FBD208,551

Manufacturer:

TI

Quantity:

1 908

Company:

BOSTOCK HK LIMITED

BOSTOCK HK LIMITED

Part Number:

LPC2468FBD208,551

Manufacturer:

NXP Semiconductors

Quantity:

10 000

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NXP Semiconductors

7. RTC usage notes

UM10237_4

User manual

Table 582. Prescaler cases where the Integer Counter reload value is incremented

The RTC may be clocked by either the 32.786 kHz RTC oscillator, or by the APB

peripheral clock (PCLK) after adjustment by the reference clock divider.

If the RTC is used, VBAT must be connected to either pin V

power supply (external battery). Otherwise, VBAT should be left floating. No provision is

made in the LPC2400 to retain RTC status upon the VBAT power loss, or to maintain time

incrementation if the clock source is lost, interrupted, or altered.

Since the RTC operates using one of two available clocks (the APB clock (PCLK) or the

32 kHz signal coming from the RTCX1-2pins), any interruption of the selected clock will

cause the time to drift away from the time value it would have provided otherwise. The

variance could be to actual clock time if the RTC was initialized to that, or simply an error

in elapsed time since the RTC was activated.

While the signal from RTCX1-2 pins can be used to supply the RTC clock at anytime,

selecting the PCLK as the RTC clock and entering the Power-down mode will cause a

lapse in the time update. Also, feeding the RTC with the PCLK and altering this timebase

during system operation (by reconfiguring the PLL, the APB divider, or the RTC prescaler)

will result in some form of accumulated time error. Accumulated time errors may occur in

case RTC clock source is switched between the PCLK to the RTCX pins, too.

Once the 32 kHz signal from RTCX1-2 pins is selected as a clock source, the RTC can

operate completely without the presence of the APB clock (PCLK). Therefore, power

sensitive applications (i.e. battery powered application) utilizing the RTC will reduce the

Fraction Counter

--- ---- ---- ---1

--- ---- ---- --10

--- ---- ---- -100

--- ---- ---- 1000

--- ---- ---1 0000

--- ---- --10 0000

--- ---- -100 0000

--- ---- 1000 0000

--- ---1 0000 0000

--- --10 0000 0000

--- -100 0000 0000

--- 1000 0000 0000

--1 0000 0000 0000

-10 0000 0000 0000

100 0000 0000 0000

Rev. 04 — 26 August 2009

Chapter 26: LPC24XX Real-Time Clock (RTC) and battery RAM

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UM10237

© NXP B.V. 2009. All rights reserved.

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