LPC122x 32-bit ARM Cortex-M0 microcontroller up to 128 kB flash and 8 kB SRAM Rev. 1.1 21 February 2011 Objective data sheet 1. General description The LPC122x extend NXP s 32-bit ARM microcontroller continuum and target a wide range of industrial applications in the areas of factory and home automation. Benefitting from the ARM Cortex-M0 Thumb instruction set, the LPC122x have up to 50 % higher code density compared to common 8/16-bit microcontroller performing typical tasks. The LPC122x also feature an optimized ROM-based divide library for Cortex-M0, which offers several times the arithmetic performance of software-based libraries, as well as highly deterministic cycle time combined with reduced flash code size. The ARM Cortex-M0 efficiency also helps the LPC122x achieve lower average power for similar applications. The LPC122x operate at CPU frequencies of up to 45 MHz.They offer a wide range of flash memory options, from 32 kB to 128 kB. The small 512-byte page erase of the flash memory brings multiple design benefits, such as finer EEPROM emulation, boot-load support from any serial interface and ease of in-field programming with reduced on-chip RAM buffer requirements. The peripheral complement of the LPC122x includes a 10-bit ADC, two comparators with 2 output feedback loop, two UARTs, one SSP/SPI interface, one I C-bus interface with Fast-mode Plus features, a Windowed Watchdog Timer, a DMA controller, a CRC engine, four general purpose timers, a 32-bit RTC, a 1 % internal oscillator for baud rate generation, and up to 55 General Purpose I/O (GPIO) pins. 2. Features and benefits Processor core ARM Cortex-M0 processor, running at frequencies of up to 45 MHz (one wait state from flash) or 30 MHz (zero wait states from flash). The LPC122x have a high score of over 45 in CoreMark CPU performance benchmark testing, equivalent to 1.51/MHz. ARM Cortex-M0 built-in Nested Vectored Interrupt Controller (NVIC). Serial Wire Debug (SWD). System tick timer. Memory Up to 8 kB SRAM. Up to 128 kB on-chip flash programming memory. In-System Programming (ISP) and In-Application Programming (IAP) via on-chip bootloader software. Includes ROM-based 32-bit integer division routines. Clock generation unitLPC122x NXP Semiconductors 32-bit ARM Cortex-M0 microcontroller Crystal oscillator with an operating range of 1 MHz to 25 MHz. 12 MHz Internal RC (IRC) oscillator trimmed to 1 % accuracy that can optionally be used as a system clock. PLL allows CPU operation up to the maximum CPU rate without the need for a high-frequency crystal. May be run from the system oscillator or the internal RC oscillator. Clock output function with divider that can reflect the system oscillator clock, IRC clock, main clock, and Watchdog clock. Real-Time Clock (RTC). LPC122X All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved. Objective data sheet Rev. 1.1 21 February 2011 2 of 60