NXP Semiconductor LPC2921 overview
NXP LPC2921 Series ARM9 Microcontrollers with CAN, LIN, and USB The LPC2921/2923/2925 combine an ARM968E-S CPU core with two integrated TCM blocks operating at ...
Product details
Manufactured byNXP Semiconductor
Product groupARM9 Microcontrollers
DescriptionNXP LPC2921 Series ARM9 Microcontrollers with CAN, LIN, and USB
General DescriptionThe 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.
Features and BenefitsARM968E-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 Serial Peripheral Interface (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 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. 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 %.- • I/O operating voltage: 2.7 V to 3.6 V; inputs tolerant up to 5.5 V. 100-pin LQFP package. -40 °C to +85 °C ambient operating temperature range.
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NXP Semiconductor
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ARM9 Microcontrollers
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