NXP Semiconductors LPC2926FBD144,557

Overview

LPC2926FBD144,557 from NXP Semiconductors is an ARM968E-S-based microcontroller with dual TCM (16 kB ITCM + 16 kB DTCM), full-speed USB 2.0 device controller, dual CAN 2.0B interfaces, dual LIN 2.0 master controllers, two 10-bit ADCs (8-channel each), and 512 kB flash memory - all in a 144-pin LQFP package rated for −40 °C to +85 °C operation. It targets industrial control, automotive body electronics, and communication gateways requiring integrated real-time I/O, deterministic timing, and mixed-signal interfacing.

For engineers reviewing the LPC2926FBD144,557 datasheet, LPC2926FBD144,557 pinout, LPC2926FBD144,557 application, or LPC2926FBD144,557 equivalent, key selection criteria include its dual-CAN/LIN/USB coexistence, 125 MHz ARM968E-S core with TCM isolation, 3.3 V I/O tolerance up to 5.5 V, and dedicated CGU1 for USB clock generation independent of system clock scaling.

Technical Context

The LPC2926FBD144,557 implements a multilayer AHB bus architecture operating at 125 MHz with four independent layers, enabling concurrent access to TCM, flash, SRAM, and peripherals without arbitration bottlenecks. Its dual-clock-generation units (CGU0 and CGU1) provide independent base clocks: CGU0 supplies 11 configurable base clocks (e.g., BASE_SYS_CLK, BASE_UART_CLK, BASE_SPI_CLK) with fractional dividers, while CGU1 uses a dedicated PLL to generate the precise 48 MHz USB clock and a programmable clock output.

Peripherals are clocked independently via branch clocks under PMU control - e.g., BASE_ADC_CLK drives both 10-bit ADCs with 2.44 μs per-channel conversion, BASE_CAN_CLK enables FullCAN message filtering on two CAN controllers, and BASE_LIN_CLK supports hardware LIN 2.0 frame generation and UART reconfiguration. The GPDMA controller supports eight channels with dual-master capability and direct access to TCM, SRAM, and peripheral FIFOs.

Key Specifications

Pinout & Package

Package: LQFP144 (SOT407-2), 20 × 20 × 1.4 mm, 144-pin plastic low-profile quad flat package with exposed thermal pad (not electrically connected). Pin functions are configured via SFSP registers in SCU; each pin supports up to four multiplexed functions including GPIO, peripheral I/O, debug, and power domains.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with LPC2926FBD144,557, LPC2930FBD144 adds Ethernet at no pinout or power penalty but increases system cost and design effort, while S32K144HAT0MLHT offers automotive qualification and higher SRAM but sacrifices integrated LIN/USB and requires external components for equivalent functionality.

Availability

LPC2926FBD144,557 is available at Aetrix Electronics and suitable for industrial control, automotive body electronics, and smart metering applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability through NXP's discontinuation notification program.

Supply support for LPC2926FBD144,557 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in ARM-based microcontrollers and automotive-grade SoCs.

The LPC2900 series was designed specifically for cost-sensitive, real-time embedded systems requiring integrated CAN, LIN, and USB in a single chip - targeting automotive body electronics, industrial gateways, and smart infrastructure where mixed-signal processing and protocol coexistence are critical.

FAQ

What is the maximum operating frequency of the LPC2926FBD144,557 CPU core?

The LPC2926FBD144,557 features an ARM968E-S core rated for up to 125 MHz operation. This maximum frequency is achieved using the on-chip PLL with crystal oscillator input (10–25 MHz range) and requires stable 1.8 V core supply and proper decoupling. The LPC2926FBD144,557 maintains full peripheral functionality-including dual CAN, USB, and ADC-at this speed.

Does the LPC2926FBD144,557 support LIN 2.0 protocol in hardware?

Yes, the LPC2926FBD144,557 integrates two dedicated LIN 2.0 master controllers with full hardware support for sync field generation, identifier handling, checksum calculation (classic/enhanced), and response timing. Each LIN interface can be reconfigured as a standard UART, providing flexibility for legacy system integration. The LPC2926FBD144,557 does not require firmware-based bit-banging for LIN compliance.

How many ADC channels does the LPC2926FBD144,557 have, and what is their resolution and speed?

The LPC2926FBD144,557 includes two independent 10-bit successive-approximation ADCs, each with eight input channels (ADC1 IN0–IN7 and ADC2 IN0–IN7). Each channel achieves a minimum conversion time of 2.44 μs, supporting sampling rates up to ~409 kHz per ADC. The LPC2926FBD144,557 also provides hardware compare functions and multiple trigger sources (timer, PWM, external) to minimize CPU interrupt load.

Is the LPC2926FBD144,557 pin-compatible with other members of the LPC29xx family?

No - the LPC2926FBD144,557 is packaged in LQFP144 (SOT407-2), whereas LPC2921/2923/2925 variants use LQFP100 (SOT407-1). Although functionally similar and sharing the same ARM968E-S core and peripheral set, the LPC2926FBD144,557 has additional pins for expanded I/O, enhanced power domains, and improved thermal dissipation. Board layout is not interchangeable with LQFP100 variants.

What debug and trace capabilities does the LPC2926FBD144,557 provide?

The LPC2926FBD144,557 integrates ARM CoreSight-compliant debug infrastructure including JTAG (IEEE 1149.1) with TDI/TDO/TMS/TCK/TRST/JTAGSEL pins, Embedded Trace Macrocell (ETM), and 8 kB Embedded Trace Buffer (ETB). The ETB stores real-time instruction and data trace generated by the ETM, accessible via JTAG for post-mortem analysis. The LPC2926FBD144,557 supports both ARM and THUMB instruction set tracing without runtime performance impact.