NXP Semiconductors LPC55S28JEV98Y

Overview

LPC55S28JEV98Y from NXP Semiconductors is a 32-bit Arm Cortex-M33 microcontroller with CASPER crypto co-processor, 512 KB flash, 256 KB SRAM, PRINCE real-time flash encryption, and dual-mode USB (FS + HS), deployed in secure IoT edge nodes requiring cryptographic acceleration and low-power operation.

For engineers reviewing the LPC55S28JEV98Y datasheet, LPC55S28JEV98Y pinout, LPC55S28JEV98Y application, or LPC55S28JEV98Y equivalent, key selection criteria include its VFBGA98 package, 150 MHz CPU frequency, PUF-based key generation, SHA2/AES hardware acceleration, and support for secure boot with RSA-2048/4096 and x.509 certificate validation.

Technical Context

The LPC55S28JEV98Y implements an Arm Cortex-M33 core (r0p3) with MPU, FPU, DSP, and ETM, running at up to 150 MHz using PLL0/PLL1 clock sources derived from internal FRO (12 MHz/1 MHz), external crystal (16–32 MHz), or RTC oscillator (32.768 kHz). Its security architecture integrates PRINCE for on-the-fly encrypted flash access, PUF for silicon-unique 64–4096-bit key derivation, and dedicated HASH-AES/SHA2 engines with DMA support.

Peripheral flexibility is enabled by nine Flexcomm interfaces (FC0–FC8), each configurable as USART/SPI/I2C/I2S with FIFO and fractional baud-rate generation; FC8 is dedicated high-speed SPI. The SCTimer/PWM supports 16 capture/match registers and 32 states, while the 16-bit ADC achieves 1.0 Msamples/sec with simultaneous differential conversions and integrated temperature sensing.

Key Specifications

Pinout & Package

VFBGA98 package (SOT1982-1), 7 mm × 7 mm body, 0.5 mm ball pitch, 98 I/O balls. Pin functions are software-configurable via IOCON registers; default reset state includes pull-up on PIO0_5 and PIO0_12, pull-down on PIO0_2 and PIO0_11, and open-drain on PIO0_13/PIO0_14.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC55S26JEV98, the LPC55S28JEV98Y offers double flash and 112 KB more SRAM for complex OTA stacks and ML inference buffers; versus LPC5528JEV98, it adds hardware-enforced security primitives essential for certified IoT deployments - making it the only option meeting TBSA and PSA Certified Level 2 requirements.

Availability

LPC55S28JEV98Y is available at Aetrix Electronics and suitable for industrial sensor hubs, secure wearables, smart home edge controllers, and automotive BCM subsystems requiring stable component supply across long-life production cycles.

Supply support for LPC55S28JEV98Y 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 markets, with deep expertise in Arm-based microcontrollers and hardware security.

The LPC55S2x series was designed to deliver scalable, certified security (TBSA, PSA Level 2) and real-time performance in resource-constrained edge devices - targeting applications where firmware integrity, cryptographic agility, and low-power operation are mandatory.

FAQ

What is the maximum operating frequency of the LPC55S28JEV98Y?

The LPC55S28JEV98Y operates at a maximum CPU frequency of 150 MHz, achieved using PLL0 or PLL1 clock sources derived from the internal 12 MHz FRO, external crystal (16–32 MHz), or 32.768 kHz RTC oscillator. This frequency is sustained across the full industrial temperature range (−40 °C to +105 °C) and supported by the Arm Cortex-M33 core's FPU and DSP extensions. The LPC55S28JEV98Y maintains timing compliance under all specified voltage (1.8–3.6 V) and thermal conditions.

Does the LPC55S28JEV98Y support secure boot with public-key cryptography?

Yes, the LPC55S28JEV98Y supports secure boot using RSASSA-PKCS1-v1_5 signatures of SHA256 digests, with RSA-2048 and RSA-4096 public keys validated against x.509 certificates. It stores up to four revocable Root of Trust keys as SHA-256 hashes in protected flash and enforces anti-rollback via image key certificate revocation. This implementation complies with TBSA and enables PSA Certified Level 2 deployment. The LPC55S28JEV98Y requires no external secure element for root key storage.

What package type and pin count does the LPC55S28JEV98Y use?

The LPC55S28JEV98Y uses a VFBGA98 package (SOT1982-1): thin fine-pitch ball grid array with 98 solder balls, 7 mm × 7 mm body size, and 0.5 mm pitch. This package supports high I/O density and thermal efficiency in compact PCB layouts. Pin functions-including GPIO, Flexcomm, ADC, USB, and debug signals-are software-configurable via IOCON registers, with documented reset states for critical pins like PIO0_5 (boot select) and PIO0_11 (ADC0_9).

How does the PRINCE module function in the LPC55S28JEV98Y?

The PRINCE module in the LPC55S28JEV98Y performs real-time AES-128 encryption of data written to on-chip flash and decryption of encrypted data read from flash. It operates transparently to software, enabling asset protection (e.g., application code obfuscation) and secure firmware updates without runtime CPU overhead. The LPC55S28JEV98Y supports booting directly from PRINCE-encrypted flash regions, and key management is handled internally-no software exposure of encryption keys occurs during operation.

Which analog peripherals are integrated into the LPC55S28JEV98Y?

The LPC55S28JEV98Y integrates a 16-bit ADC with 1.0 Msamples/sec sampling rate, supporting five differential or ten single-ended input channels; an analog comparator with five inputs and selectable internal/external reference; and an integrated temperature sensor connected to the ADC. These peripherals share DMA channels and support simultaneous conversions on differential pairs. The LPC55S28JEV98Y does not require external signal conditioning for basic environmental monitoring or motor current sensing in industrial applications.