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NXP Semiconductors LPC2921FBD100,551
- Part No.:
- LPC2921FBD100,551
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LPC2921FBD100,551.pdf
- Description:
- LPC2900 - Arm9, 32-Bit RISC Micr
- Quantity:
- Payment:
- Shipping:
Inventory:287
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Product details
Overview
LPC2921FBD100 from NXP Semiconductors is an ARM968E-S microcontroller operating at up to 125 MHz, featuring 128 kB flash, 24 kB SRAM (including 8 kB ETB), dual 10-bit ADCs, Full-speed USB 2.0 device controller, two CAN controllers, and two LIN master interfaces - all in a 100-pin LQFP package for industrial control and automotive body electronics.
For engineers reviewing the LPC2921FBD100 datasheet, LPC2921FBD100 pinout, LPC2921FBD100 application, or LPC2921FBD100 equivalent, this page delivers verified technical context, validated pin functions, confirmed peripheral integration (USB/CAN/LIN/ADC), and real-world use-case mapping - critical for embedded system architecture, power-aware firmware design, and automotive subsystem qualification.
Technical Context
The LPC2921FBD100 implements a multilayer AHB bus running at 125 MHz with four independent layers, enabling concurrent access to TCM, flash, and peripherals without arbitration bottlenecks. Its dual-master GPDMA controller supports memory-to-memory transfers and direct peripheral interfacing (SPI, UART, TCM), reducing CPU load during high-throughput I/O operations.
Two independent Clock Generation Units (CGU0 and CGU1) provide granular clock control: CGU0 generates 11 base clocks with fractional dividers for peripherals (UART, SPI, ADC, CAN, LIN), while CGU1-featuring its own PLL-supplies the USB 48 MHz clock and a configurable output clock, decoupling USB timing from system clock scaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM968E-S, 32-bit RISC, up to 125 MHz - enables real-time deterministic execution with THUMB/ARM instruction set support for code density and performance trade-off. |
| Memory | 128 kB on-chip flash + 24 kB SRAM (16 kB main SRAM + 8 kB ETB) - sufficient for boot code, application logic, and trace buffer usage without external memory. |
| ADC | Two 10-bit ADCs, 8 channels each, 2.44 μs conversion time per channel - supports fast analog sensing in motor control or battery monitoring with hardware compare triggering. |
| Communication | Full-speed USB 2.0 device (with on-chip PHY), two CAN 2.0B controllers (FullCAN + message filtering), two LIN 2.0 masters - enables mixed-protocol vehicle network nodes with minimal external components. |
| Timers & PWM | Four 32-bit timers (each with four capture/compare registers), four six-channel PWMs with trap/capture - suitable for precise motor phase control, encoder feedback, and fault-safe actuator driving. |
| Power Supply | Dual supply: 1.8 V ±5 % for core, 2.7–3.6 V for I/O (5.5 V tolerant inputs) - allows direct interfacing with 3.3 V sensors and legacy 5 V peripherals while minimizing core power consumption. |
Pinout & Package
Package: 100-pin LQFP (SOT407-1), 14 × 14 × 1.4 mm, −40 °C to +85 °C ambient operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P5[19]/USB_D+ | USB differential data positive | Dedicated analog I/O pad for full-speed USB 2.0 physical layer; requires controlled impedance routing and ESD protection per USB spec. |
| P5[18]/USB_D− | USB differential data negative | Complementary USB differential pair; must be routed as matched-length, tightly coupled traces to maintain signal integrity. |
| VDD(CORE) | Digital core power supply | 1.8 V ±5 % supply for ARM968E-S core and TCMs; requires low-noise regulation and local decoupling near pins 15/42/62/90. |
| VDD(IO) | I/O power supply | 3.3 V supply for GPIO, UART, SPI, CAN, LIN, and ADC reference; supports 5.5 V-tolerant inputs for backward compatibility. |
| VDDA(ADC3V3) | ADC analog reference supply | 3.3 V dedicated supply for both ADCs; must be filtered separately from digital I/O supply to ensure <1 LSB noise performance. |
| RST | Asynchronous reset input | Active-low reset pin with internal pull-up; initiates full chip reset including CGU, PMU, and peripheral state machines upon assertion. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible Clock Generation Unit (CGU0) | Generates 11 base clocks with seven fractional dividers - enables independent clock scaling per peripheral subsystem to minimize dynamic power in mixed-speed applications. |
| Dedicated CGU1 with USB PLL | Provides isolated 48 MHz USB clock and configurable output clock - eliminates USB timing jitter caused by system clock fluctuations during DVFS operation. |
| Two CAN controllers with FullCAN | Hardware message filtering and acceptance masks per controller - reduces CPU interrupt load in automotive networks with >32 concurrent message IDs. |
| ETM/ETB debug with 8 kB SRAM | On-chip trace buffer accessible for code/data storage - enables non-intrusive real-time instruction tracing without external logic analyzers or bandwidth-limited JTAG streaming. |
| Quadrature Encoder Interface (QEI) | Monitors one external quadrature encoder with direction and count resolution - supports position/speed feedback in BLDC motor drives without software polling or timer resource allocation. |
Applications
| Automotive Body Control Module | Industrial Motor Drive Controller |
|---|---|
|
Use Scenario: Centralized control of door locks, window lifts, mirrors, and lighting via CAN/LIN communication with vehicle network. IC Role / Device Role / Timing Role: Main MCU executing safety-critical state machines, managing LIN slave devices, and relaying CAN messages between subsystems. Use Value: Dual CAN + dual LIN + 24 kB SRAM enable concurrent protocol handling and local decision-making without external memory, meeting ASIL-B functional safety requirements. |
Use Scenario: Closed-loop control of 3-phase BLDC motors using PWM outputs, ADC current sensing, and quadrature encoder feedback. IC Role / Device Role / Timing Role: Real-time motion controller with synchronized PWM generation, ADC sampling, and QEI decoding on a single die. Use Value: Four independent PWM modules with trap functionality and sub-3 μs ADC conversion allow precise commutation timing and overcurrent shutdown within 100 ns. |
| USB-Capable Industrial HMI | Smart Sensor Hub with CAN Gateway |
|
Use Scenario: Human-machine interface panel with touch buttons, LED indicators, and USB configuration port for field updates. IC Role / Device Role / Timing Role: USB device endpoint for firmware upload and diagnostics, while managing GPIO-based UI elements and RS-485 serial displays. Use Value: Integrated USB PHY and 2× UARTs with RS-485 support eliminate external transceivers, reducing BOM cost and PCB area in compact enclosures. |
Use Scenario: Aggregation and translation of sensor data (temperature, pressure, vibration) from multiple analog and digital sources onto a CAN bus. IC Role / Device Role / Timing Role: Protocol gateway bridging ADC inputs, I²C sensor reads, and SPI flash logging to dual CAN channels with configurable message prioritization. Use Value: Two independent CAN controllers with global acceptance filters allow simultaneous reception of high-priority actuator commands and low-priority diagnostic telemetry without CPU contention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ARM9 microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPC2923FBD100 | 256 kB flash, same 24 kB SRAM, identical peripherals and pinout - differs only in flash capacity. | Suitable for larger firmware images requiring bootloader + application + OTA update partitioning. | Select when firmware size exceeds 128 kB but no additional RAM or peripheral features are needed. |
| LPC2925FBD100 | 512 kB flash, 40 kB SRAM (2×16 kB + 8 kB ETB), otherwise identical peripheral set and pinout. | Supports complex real-time OS stacks, dual-application redundancy, or extended data logging buffers. | Choose for applications needing >24 kB runtime RAM or firmware images >256 kB, with no change to board layout. |
Compared with LPC2921FBD100, the LPC2923FBD100 and LPC2925FBD100 offer scalable flash and RAM while preserving identical peripheral integration, clock architecture, and thermal/power profiles - enabling seamless migration paths within the same LQFP100 footprint without redesigning USB/CAN signal integrity or power delivery networks.
Availability
LPC2921FBD100 is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, USB-enabled HMIs, and smart sensor gateways requiring stable component supply across multi-year production cycles.
Supply support for LPC2921FBD100 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in ARM-based microcontrollers and automotive-grade reliability.
The LPC2921FBD100 belongs to NXP's LPC2900 family - designed specifically for cost-sensitive, mixed-signal automotive and industrial control applications requiring integrated CAN/LIN/USB, deterministic real-time performance, and robust power management.
FAQ
What is the maximum operating frequency of the LPC2921FBD100 CPU core?
The LPC2921FBD100 integrates an ARM968E-S core rated for operation up to 125 MHz. This maximum frequency is achieved using the on-chip PLL with a crystal oscillator input between 10 MHz and 25 MHz. The core operates at 1.8 V ±5 %, and sustained 125 MHz operation requires adherence to thermal limits and proper decoupling per the datasheet's power supply recommendations.
Does the LPC2921FBD100 support USB host functionality?
No, the LPC2921FBD100 only implements a Full-speed USB 2.0 device controller with integrated PHY - it does not support USB host or OTG modes. Its USB interface is strictly configured as a peripheral endpoint, intended for connection to a host PC or embedded host controller, not for enumerating other USB devices.
How much SRAM is available on the LPC2921FBD100, and how is it allocated?
The LPC2921FBD100 provides 24 kB of total SRAM: 16 kB of general-purpose SRAM and 8 kB of ETB SRAM. The ETB SRAM is primarily used for instruction trace storage but is also accessible for application code and data. Unlike the LPC2923/LPC2925, the LPC2921FBD100 does not include a second 16 kB SRAM block.
Can the LIN interfaces on the LPC2921FBD100 be reconfigured as standard UARTs?
Yes, each LIN master interface on the LPC2921FBD100 can be configured in UART mode via software control of the SCU SFSP registers, providing two additional UART channels. This flexibility allows reuse of LIN pins for debug, diagnostics, or RS-485 communication when LIN protocol is not required in a given design.
What are the key differences between the LPC2921FBD100 and LPC2925FBD100?
The LPC2921FBD100 has 128 kB flash and 24 kB SRAM, while the LPC2925FBD100 offers 512 kB flash and 40 kB SRAM (two 16 kB blocks + 8 kB ETB). All peripherals, pinout, clock architecture, and package are identical - making the LPC2925FBD100 a drop-in upgrade for designs needing more code space or runtime memory, without PCB changes.
LPC2921FBD100,551 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 100-LQFP
- Series:
- LPC2900
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- -
- Core Processor:
- ARM968E-S
- Core Size:
- 16/32-Bit
- Speed:
- 125MHz
- Connectivity:
- CANbus, I2C, LINbus, SPI, UART/USART, USB
- Peripherals:
- DMA, POR, PWM, WDT
- Number of I/O:
- 60
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 16K x 8
- RAM Size:
- 24K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 16x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LPC2921FBD100,551 FAQ
1.How can I place an order for LPC2921FBD100,551 through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC2921FBD100,551 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LPC2921FBD100,551 reliable?
The price and inventory of LPC2921FBD100,551 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC2921FBD100,551 is usually 5 days.
3.What payment methods are accepted for LPC2921FBD100,551?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC2921FBD100,551 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC2921FBD100,551?
LPC2921FBD100,551 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC2921FBD100,551 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LPC2921FBD100,551?
For technical support, including LPC2921FBD100,551 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC2921FBD100,551 requirements.
6.How does Aetrix verify that LPC2921FBD100,551 is sourced from the original manufacturer or authorized distributors?
All LPC2921FBD100,551 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LPC2921FBD100,551 meets industry standards.
7.What is the process for return or replacement of LPC2921FBD100,551?
All LPC2921FBD100,551 units undergo pre-shipment inspection (PSI). If there is an issue with LPC2921FBD100,551, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LPC2921FBD100,551 part is unused and in its original packaging.
Return procedure for LPC2921FBD100,551:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LPC2921FBD100,551 Tags
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