LPC2921/2923/2925

General description

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, medical, 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.

Features

• ARM968E-S processor running at frequencies of up to 125 MHz maximum.
• Multilayer AHB system bus at 125 MHz with four separate layers.
• On-chip memory:
  • Two Tightly Coupled Memories (TCM), 16 kB Instruction (ITCM) and 16 kB Data TCM (DTCM).
  • On the LPC2925, two separate internal Static RAM (SRAM) instances, 16 kB each.
  • On the LPC2923 and LPC2921, one 16 kB SRAM block.
  • 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/programmable.
• Dual-master, eight-channel GPDMA controller on the AHB multilayer matrix which can be used with the SPI interfaces and the UARTs, as well as for memory-to-memory transfers including the TCM memories.
• 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 master 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 RS-485/EIA-485 (9-bit) support.
  • Three full-duplex Q-SPIs with four slave-select lines; 16 bits wide; 8 locations deep; Tx FIFO and Rx FIFO.
  • Two I²C-bus interfaces.
• 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 us 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.
• 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 and CAN or LIN activity.
• Flexible Reset Generator Unit (RGU) able to control resets of individual modules.
• Flexible Clock-Generation Unit (CGU) 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.
• Second, dedicated CGU with its own PLL generates the USB clock and a configurable clock output.
• Highly configurable system Power Management Unit (PMU):
  • clock control of individual modules.
  • allows minimization of system operating power consumption in any configuration.
• 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.
• Dual power supply:
  • CPU operating voltage: 1.8 V +- 5 pct.
  • I/O operating voltage: 2.7 V to 3.6 V; inputs tolerant up to 5.5 V.
• 100-pin LQFP package.
• -40 Cel to +85 Cel ambient operating temperature range.

Products/packages

Quality/reliability/chemical content

Quality and reliability disclaimer

Pricing/ordering/availability

Block diagrams/pinning

Design support

Application Notes

AN10795; LPC29xx Power-down mode explained (2009-02-25)

AN10809; LPC29xx flash features (2009-04-13)

AN10878; Migrating to the LPC1700 series (2009-10-06)

AN10775; NicheLite for LPC implementation notes (2009-07-16)

Support Documents

LPC29xx_PD_APPNOTE_code; AN10795 power-down appnote code (2009-03-12)

LPC29xx_samplecode; AN10809 - LPC29xx flash software examples (2009-04-20)

75016543; An industry-leading portfolio of cost-effective, power-saving solutions for major home appliances (2008-06-01)

75016739; Development Tools for ARM-based MCUs - June 2009 (2009-06-01)

ES_LPC2921_23_25; Errata Sheet LPC2921/LPC2923/LPC2925 (2009-04-04)

web; LPC2000 EDA files (IBIS, BSDL, OrCAD, PADS, etc.) (2009-07-27)

UM10316; LPC29xx User manual (2009-05-22)

75016628; LPC29xx leaflet (125MHz ARM968-based microcontrollers) (2008-09-01)

web; LPCZone Training Video - LPC29xx Base Module (2009-01-01)

web; LPCZone Training Video - NTRU Encryption Overview training (2008-01-06)

75016725; Microcontroller Brochure - April 2009 (2009-04-04)

75016669; Microcontroller Line Card - April 2009 (2009-04-04)

web; Sample Code Bundle for LPC292x and LPC293x Peripherals using Keil's MDK-ARM (2009-05-21)

Parametrics/similar products

Similar products
LPC2921/2923/2925 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.

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Disclaimers

• General product disclaimer
• Quality and reliability disclaimer