NXP Semiconductors LPC2923FBD100,551

Overview

LPC2923FBD100 from NXP Semiconductors is an ARM968E-S-based microcontroller operating at up to 125 MHz, featuring 256 kB flash, 24 kB SRAM (including 8 kB ETB), dual CAN 2.0B controllers, two LIN 2.0 masters, full-speed USB 2.0 device controller with on-chip PHY, and two 10-bit ADCs - deployed in industrial motor control, automotive body electronics, and industrial communication gateways.

For engineers reviewing the LPC2923FBD100 datasheet, LPC2923FBD100 pinout, LPC2923FBD100 application, or LPC2923FBD100 equivalent, key selection criteria include its dual-CAN/LIN/USB integration, 100-pin LQFP package with 60 GPIOs, 1.8 V core / 3.3 V I/O dual supply, and TCM-optimized real-time execution for deterministic control loops.

Technical Context

The LPC2923FBD100 implements a multilayer AHB bus architecture running 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 clock domains: CGU0 supplies base clocks for CPU, timers, UARTs, SPIs, CAN, LIN, and ADCs, while CGU1 generates the USB 48 MHz clock and configurable output clock via dedicated PLL and fractional dividers.

It integrates two tightly coupled memories (16 kB ITCM + 16 kB DTCM) directly connected to the ARM968E-S core for zero-wait-state instruction and data access, alongside a GPDMA controller supporting memory-to-memory and peripheral-to-memory transfers-including DMA access to TCM. The Vectored Interrupt Controller (VIC) supports 16 priority levels and up to 16 external interrupt sources, including CAN/LIN wake-up capability.

Key Specifications

Pinout & Package

Package: Plastic low-profile quad flat package, 100 leads, body size 14 × 14 × 1.4 mm (SOT407-1), rated for −40 °C to +85 °C ambient operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC2923FBD100, LPC2925FBD100 offers double flash and 16 kB more SRAM for firmware scalability, while LPC2921FBD100 reduces flash cost but constrains feature-rich firmware deployment - all share identical peripheral functionality, timing behavior, and LQFP100 pin compatibility.

Availability

LPC2923FBD100 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and smart energy metering requiring stable component supply across extended product lifecycles.

Supply support for LPC2923FBD100 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 over 50 years of embedded systems expertise.

The LPC2900 family was designed specifically for real-time industrial and automotive networking applications requiring integrated CAN, LIN, and USB - delivering deterministic performance with low-power clock gating and TCM-optimized execution.

FAQ

What is the maximum operating frequency of the LPC2923FBD100 CPU core?

The LPC2923FBD100 features an ARM968E-S core rated for operation up to 125 MHz. This maximum frequency is achieved using the on-chip PLL with a 10–25 MHz crystal input and is sustained under full thermal and voltage specifications (1.8 V ±5 % core supply, −40 °C to +85 °C). The LPC2923FBD100 maintains this speed across all integrated peripherals including CAN, LIN, and USB controllers.

Does the LPC2923FBD100 support USB device functionality without external components?

Yes, the LPC2923FBD100 integrates a full-speed USB 2.0 device controller with an on-chip physical layer (PHY), requiring only two external 27 Ω series resistors on USB_D+ and USB_D− lines and standard USB ESD protection. No external transceiver, level shifter, or clock source is needed - the dedicated CGU1 generates the precise 48 MHz USB clock internally.

How many CAN controllers does the LPC2923FBD100 include, and what protocol versions do they support?

The LPC2923FBD100 includes two independent CAN 2.0B controllers supporting both standard (11-bit) and extended (29-bit) identifier frames, FullCAN mode, and hardware-based message acceptance filtering. Each controller operates autonomously with dedicated transmit/receive buffers and supports bit rates up to 1 Mbps - fully compliant with ISO 11898-1.

What is the total SRAM capacity of the LPC2923FBD100, and how is it allocated?

The LPC2923FBD100 provides 24 kB of total SRAM: 16 kB main SRAM block (accessible via AHB), plus 8 kB Embedded Trace Buffer (ETB) SRAM that is also usable for general code/data storage. Unlike the LPC2925FBD100, it does not include the second 16 kB SRAM block - all 24 kB is available for application use, with no portion reserved exclusively for debug.

Is the LPC2923FBD100 pin-compatible with other members of the LPC292x family?

Yes, the LPC2923FBD100 is fully pin-compatible with LPC2921FBD100 and LPC2925FBD100 in the LQFP100 (SOT407-1) package. All share identical pin assignments, electrical characteristics, peripheral mappings, and power supply requirements - enabling drop-in replacement based solely on flash/SRAM capacity needs without PCB redesign.