General description
The LPC43S5x/S3x are ARM Cortex-M4 based microcontrollers for embedded
applications which include an ARM Cortex-M0 coprocessor, up to 1 MB of flash and
136 kB of on-chip SRAM, 16 kB of EEPROM memory, security features with AES engine,
a quad SPI Flash Interface (SPIFI), advanced configurable peripherals such as the State
Configurable Timer (SCT) and the Serial General Purpose I/O (SGPIO) interface, two
High-speed USB controllers, Ethernet, LCD, an external memory controller, and multiple
digital and analog peripherals. The LPC43S5x/S3x operate at CPU frequencies of up to
204 MHz.
The ARM Cortex-M4 is a 32-bit core that offers system enhancements such as low power
consumption, enhanced debug features, and a high level of support block integration. The
ARM Cortex-M4 CPU incorporates a 3-stage pipeline, uses a Harvard architecture with
separate local instruction and data buses as well as a third bus for peripherals, and
includes an internal prefetch unit that supports speculative branching. The ARM
Cortex-M4 supports single-cycle digital signal processing and SIMD instructions. A
hardware floating-point unit is integrated in the core. The ARM Cortex-M4 with
floating-point unit is often referred to as M4F.
The ARM Cortex-M0 coprocessor is an energy-efficient and easy-to-use 32-bit core which
is upward code- and tool-compatible with the Cortex-M4 core. The Cortex-M0
coprocessor, designed as a replacement for existing 8/16-bit microcontrollers, offers up to
204 MHz performance with a simple instruction set and reduced code size.
For additional documentation related to the LPC43xx parts, see Section 17.
Features and benefits
 Cortex-M4 Processor core
 ARM Cortex-M4 processor (version r0p1), running at frequencies of up to
204 MHz.
 Built-in Memory Protection Unit (MPU) supporting eight regions.
 Built-in Nested Vectored Interrupt Controller (NVIC).
 Hardware floating-point unit.
 Non-maskable Interrupt (NMI) input.
 JTAG and Serial Wire Debug (SWD), serial trace, eight breakpoints, and four watch
points.
 Enhanced Trace Module (ETM) and Enhanced Trace Buffer (ETB) support.
 System tick timer.
 Cortex-M0 Processor core
Applications
 Motor control  Embedded audio applications
 Power management  Industrial automation
 White goods  e-metering
 RFID readers