The LPC436x are ARM Cortex-M4 based microcontrollers for embedded applications, which
include an ARM Cortex-M0 coprocessor and an ARM Cortex-M0 subsystem for managing
peripherals, up to 1 MB of flash and 154 kB of on-chip SRAM, 16 kB of EEPROM memory, a
quad SPI Flash Interface (SPIFI), advanced configurable peripherals such as the
SCTimer/PWM 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 LPC436x 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 processor is integrated into the core.
The LPC436x include an application ARM Cortex-M0 coprocessor and a second ARM Cortex-M0
subsystem for managing the SGPIO and SPI peripherals.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. In LPC436x, the Cortex-M0 coprocessor hardware
multiply is implemented as a 32-cycle iterative multiplier.