NXP Semiconductors LPC4320FET100,551

Overview

LPC4320FET100,551 from NXP Semiconductors is a flashless dual-core ARM Cortex-M4/M0 microcontroller in a 100-ball TFBGA package, operating at up to 204 MHz with 200 kB on-chip SRAM, no Ethernet or LCD controller, one high-speed USB 2.0 host/device interface (USB0), and four ADC input channels - deployed in industrial motor control and embedded audio subsystems requiring deterministic real-time processing.

For engineers reviewing the LPC4320FET100,551 datasheet, LPC4320FET100,551 pinout, LPC4320FET100,551 application, or LPC4320FET100,551 equivalent, this page delivers verified core architecture details, validated TFBGA100 pin mapping, confirmed peripheral enablement status per variant, and two technically documented alternative parts for functional migration paths.

Technical Context

The LPC4320FET100,551 integrates an ARM Cortex-M4 core with hardware floating-point unit and Memory Protection Unit (MPU), paired with a fully independent ARM Cortex-M0 coprocessor running at up to 204 MHz - enabling asymmetric multiprocessing where the M0 handles time-critical I/O offload while the M4 executes complex signal processing. Both cores share access to the AHB multilayer matrix but maintain separate local SRAM blocks (72 kB for M4, 128 kB for M0).

Its clock system includes three PLLs: one for CPU operation, one dedicated to USB0, and a third configurable as audio PLL; the 12 MHz internal RC oscillator provides ±1.5% accuracy across voltage/temperature, eliminating need for external crystal in cost-sensitive designs. The device lacks Ethernet MAC, LCD controller, and USB1, distinguishing it from higher-tier LPC43x0 variants.

Key Specifications

Pinout & Package

Package: Plastic thin fine-pitch ball grid array (TFBGA100), 100 balls, body size 9 mm × 9 mm × 0.7 mm (SOT926-1). Ball pitch: 0.8 mm. Compatible with standard reflow profiles for fine-pitch BGA assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC4320FET100,551, LPC4330FET100 offers expanded peripheral set at identical package size but higher power consumption; LPC4322FET100 adds display/network capabilities unsuitable for cost-constrained motor control where those features remain unused.

Availability

LPC4320FET100,551 is available at Aetrix Electronics and suitable for industrial motor control, embedded audio subsystems, power management units, RFID reader controllers, and low-power sensor node designs requiring stable component supply and long-term lifecycle assurance.

Supply support for LPC4320FET100,551 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 edge processing.

The LPC4300 series was designed specifically for high-performance embedded systems requiring deterministic real-time response, dual-core asymmetry, and rich analog/digital peripheral integration - targeting industrial automation and audio processing markets.

FAQ

What is the maximum operating frequency of the LPC4320FET100,551?

The LPC4320FET100,551 operates at a maximum CPU frequency of 204 MHz for both the ARM Cortex-M4 and Cortex-M0 cores. This frequency is achieved using the on-chip PLL driven by either the 12 MHz internal RC oscillator or an external crystal source. The device maintains timing compliance across its specified voltage range (2.2 V to 3.6 V) and industrial temperature range (−40 °C to +85 °C).

Does the LPC4320FET100,551 include on-chip flash memory?

No, the LPC4320FET100,551 is a flashless microcontroller. It relies on external serial NOR/NAND flash or SPIFI-connected memory for program storage, while executing code from its 200 kB of on-chip SRAM. The 64 kB ROM contains boot code and USB/SD/MMC drivers, but no user-programmable flash is integrated.

Which USB interfaces are enabled on the LPC4320FET100,551?

The LPC4320FET100,551 includes only USB0 - a high-speed USB 2.0 Host/Device/OTG interface with integrated PHY. USB1 is explicitly disabled in this variant, as confirmed in Table 2 of the datasheet. No ULPI interface or external PHY support is available for USB1 on LPC4320FET100,551.

How many ADC input channels does the LPC4320FET100,551 support?

The LPC4320FET100,551 supports four ADC input channels (ADC0_0 through ADC0_3), shared between its two 10-bit ADCs. Unlike higher-tier variants, it does not provide eight channels - this limitation is specific to the LPC4320 family and documented in Table 2 of the datasheet.

Is the LPC4320FET100,551 pin-compatible with other LPC43xx TFBGA100 variants?

Yes, the LPC4320FET100,551 shares identical TFBGA100 pinout and ball assignment with LPC4330FET100 and LPC4310FET100. However, peripheral functionality differs: Ethernet, LCD, USB1, and motor control PWM are disabled in LPC4320FET100,551, so PCB design must avoid relying on those signals even though pins are physically present.