General description
The LPC55S1x/LPC551x is an ARM Cortex-M33 based microcontroller for embedded
applications. These devices include CASPER Crypto engine, up to 256 KB on-chip flash,
up to 96 KB of on-chip SRAM, PRINCE module for on-the-fly flash encryption/decryption,
high-speed/full-speed USB host and device interface with crystal-less operation for
full-speed, CAN FD, five general-purpose timers, one SCTimer/PWM, one RTC/alarm
timer, one 24-bit Multi-Rate Timer (MRT), a Windowed Watchdog Timer (WWDT), nine
flexible serial communication peripherals (which can be configured as a USART, SPI, high
speed SPI, I2C, or I2S interface), Programmable Logic Unit (PLU), one 16-bit 2.0
Msamples/sec ADC, comparator, and temperature sensor.
The ARM Cortex-M33 provides a security foundation, offering isolation to protect valuable
IP and data with TrustZone® technology. It simplifies the design and software
development of digital signal control systems with the integrated digital signal processing
(DSP) instructions. To support security requirements, the LPC55S1x/LPC551x also offers
support for secure boot, HASH, AES, RSA, UUID, dynamic encrypt and decrypt, debug
authentication, and TBSA compliance.
Features and benefits
 ARM Cortex-M33 core (r0p4):
 Running at a frequency of up to 150 MHz.
 TrustZone®, Floating Point Unit (FPU) and Memory Protection Unit (MPU).
 ARM Cortex M33 built-in Nested Vectored Interrupt Controller (NVIC).
 Non-maskable Interrupt (NMI) input with a selection of sources.
 Serial Wire Debug with eight breakpoints and four watch points. Includes Serial
Wire Output for enhanced debug capabilities.
 System tick timer.
 CASPER Crypto co-processor is provided to enable hardware acceleration for various
functions required for certain asymmetric cryptographic algorithms, such as, Elliptic
Curve Cryptography (ECC).