Arm9™ microcontroller with CAN, LIN, and USB

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The LPC2921/2923/2925 combine an ARM968E-S CPU core with two integrated TCM blocks operating at frequencies of up to 125 MHz, Full-speed USB 2.0 device controller, CAN and LIN, up to 40 kB SRAM, up to 512 kB flash memory, two 10-bit ADCs, and multiple serial and parallel interfaces in a single chip targeted at consumer, industrial, and communication markets. To optimize system power consumption, the LPC2921/2923/2925 has a very flexible Clock Generation Unit (CGU) that provides dynamic clock gating and scaling.

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Data Sheet

Application Notes

Product Details

Block Diagram

Block diagram: LPC2921FBD100, LPC2923FBD100, LPC2925FBD100

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Features

Main Features

ARM968E-S processor running at frequencies of up to 125 MHz maximum.
Multi-layer AHB system bus at 125 MHz with three separate layers.
Dual-leader, eight-channel GPDMA controller on the AHB multilayer matrix whICh can be used with the Serial Peripheral Interface (SPI) interfaces and the UARTs, as well as for memory-to-memory transfers including the TCM memories.
Up to 60 general-purpose I/O pins with programmable pull-up, pull-down, or bus keeper.
Vectored Interrupt Controller (VIC) with 16 priority levels.
Up to 16 level-sensitive external interrupt pins, including USB, CAN and LIN wake-up features.
Configurable clock-out pin for driving external system clocks.
Processor wake-up from power-down via external interrupt pins; CAN or LIN activity.
Flexible Reset Generator Unit (RGU) able to control resets of individual modules.
Second CGU (CGU1) with its own PLL generates a configurable clock output.
Standard Arm^{^®} test and debug interface with real-time in-circuit emulator.
Boundary-scan test supported.
ETM/ETB debug functions with 8 kB of dedicated SRAM also accessible for application code and data storage.
144-pin LQFP package.
-40 °C to +85 °C ambient operating temperature range.

On-chip memory

Two Tightly Coupled Memories (TCM), 16 kB Instruction TCM (ITCM), 16 kB Data TCM (DTCM).
On the LPC2925, two separate internal StatIC RAM (SRAM) instances, 16 kB each.
8 kB ETB SRAM also usable for code execution and data.
Up to 512 kB high-speed flash-program memory.
16 kB true EEPROM, byte-erasable and programmable.
On the LPC2923 and LPC2921, one 16 kB SRAM block.

Serial interfaces

USB 2.0 full-speed devICe controller with dedICated DMA controller and on-chip devICe PHY.
Two-channel CAN controller supporting FullCAN and extensive message filtering
Two LIN leader controllers with full hardware support for LIN communication. The LIN interface can be configured as UART to provide two additional UART interfaces.
Two 550 UARTs with 16-byte Tx and Rx FIFO depths, DMA support, and RS485/EIA-485 (9 bit) support.
Three full-duplex Q-SPIs with four follower-select lines; 16 bits wide; 8 locations deep; Tx FIFO and Rx FIFO.
Two I²C-bus interfaces.

Flexible Clock-Generation Unit (CGU0) able to control clock frequency of individual modules

On-chip very low-power ring oscillator; fixed frequency of 0.4 MHz; always on to provide a Safe_Clock source for system monitoring.
On-chip crystal oscillator with a recommended operating range from 10 MHz to 25 MHz. PLL input range 10 MHz to 25 MHz.
On-chip PLL allows CPU operation up to a maximum CPU rate of 125 MHz.
Generation of up to 11 base clocks.
Seven fractional dividers.

Highly configurable system Power Management Unit (PMU)

clock control of individual modules.
allows minimization of system operating power consumption in any configuration.

Dual power supply

CPU operating voltage: 1.8 V ± 5 %.
I/O operating voltage: 2.7 V to 3.6 V; inputs tolerant up to 5.5 V.

Other peripherals

Two 10-bit ADCs, 8-channels each, with 3.3 V measurement range provide 8 analog inputs each with conversion times as low as 2.44 μs per channel. Each channel provides a compare function to minimize interrupts.
Multiple trigger-start option for all ADCs: timer, PWM, other ADC, and external signal input.
Four 32-bit timers each containing four capture-and-compare registers linked to I/Os.
Four six-channel PWMs (Pulse-Width Modulators) with capture and trap functionality.
Two dedicated 32-bit timers to schedule and synchronize PWM and ADC.
Quadrature encoder interface that can monitor one external quadrature encoder.
32-bit watchdog with timer change protection, running on safe clock.

Part numbers include: LPC2925FBD100.

Buy/Parametrics

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Documentation

Quick reference to our documentation types.

1-5 of 13 documents

^{Data Sheet}
Arm9 microcontroller with CAN, LIN, and USB

PDFRev 3.0Apr 14, 2010564.3 KBLPC2921_23_25English
^{Application Note}
LPC29xx Power-down mode explained

ZIPRev 2.0Apr 17, 2014246.9 KBAN10795English
^{Application Note}
Guidelines for full-speed USB on NXP's LPC microcontrollers

PDFRev 1.1Feb 20, 2014151.2 KBAN11392English
^{Application Note}
Sensorless single-shunt FOC on LPC2900

ZIPRev 1.0Feb 14, 20141.7 MBAN10899English
^{Application Note}
UUencoding for UART ISP

PDFRev 1.0Jul 6, 2012142.1 KBAN11229English
^{Application Note}
Migrating to the LPC1700 series

PDFRev 1.0Oct 6, 2009615.0 KBAN10878English
^{Application Note}
NicheLite for LPC implementation notes

PDFRev 1.0Jul 16, 2009190.0 KBAN10775English
^{User Guide}
LPC29xx User manual

PDFRev 3.0Oct 26, 20103.4 MBUM10316English
^Brochure
Arm^®968-based microcontrollers with USB, CAN, LIN, 5V ADC and Motor Control; 125 MHz, 32-bit Microcontrollers with Arm968™ core, LPC2900 series

PDFRev 1.0Aug 31, 2008571.0 KB75016628English
^Errata
Errata Sheet LPC2921/LPC2923/LPC2925

PDFRev 1.0Apr 4, 200949.0 KBES_LPC2921_23_25English
^{Package Information}
plastic low profile quad flat package; 100 leads; body 14 x 14 x 1.4 mm

PDFRev 1.0Feb 8, 2016652.9 KBSOT407-1English
^{Training Presentation}
Driving the LPC2900 with Murata resonators

PDFRev 1.1Nov 27, 201337.3 KBR_10005English
^{Supporting Information}
ADC design guidelines

PDFRev 1.0May 9, 2014148.8 KBTN00009English

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Design Resources

Design Files

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2 design files

Receive the full breakdown. See the product footprint and more in the eCad file.

^Models
IBIS models for LPC29xx

ZIPRev 1Jun 13, 2017 16:19:00882.5 KBIBIS_LPC29xx
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^{Symbols and Footprints}
LPC2xxx ORCAD symbols

ZIPRev 0Jun 3, 2016 00:00:0013.1 KBLPC2000-ORCAD-SYM
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Arm9^™ microcontroller with CAN, LIN, and USB