Freescale Semiconductor MK21DX256xxx5

The Freescale Semiconductor MK21DX256xxx5 is a Core features - 32-bit ARM Cortex-M4 core (up to 50MHz CPU Clock) - DSP Support - Nested vectored interrupt contr. (NVIC) - Async. wake-up interrupt contr. (AWIC) Debug & trace capability - 2-pin serial wire debug (SWD) - IEEE 1149.1 Joint Test Action Group (JTAG) - IEEE 1149.7 compact JTAG (cJTAG) - Trace port interface unit (TPIU) - Flash patch and breakpoint (FPB) - Data watchpoint and trace (DWT) - Instrumentation trace macrocell (ITM) System and power management - SW/HW watchdog with external monitor pin - DMA controller - Low-leakage wake-up unit (LLWU) - Power management contr. with 10 different power modes - Non-maskable interrupt (NMI) - 128-bit unique identification (ID) number per chip Clocks - Multi-purpose clock generator - PLL and FLL operation - Internal reference clocks - 3MHz to 32MHz crystal osc. - 32kHz crystal osc. Memories and Memory Interfaces - FlexMemory (FlexNVM or FlexRAM) - 256KB Flash - 64KB Flex Memory - 32KB SRAM - Flash security and protection features - Serial flash programming interface (EzPort) Security and integrity - Cyclic redundancy check (CRC) Analog - 16-bit SAR ADC - Programmable voltage reference (VREF) - High-speed Analog comparator (CMP) with 6-bit DAC Timers - 1x8ch motor control/general purpose/PWM flexible timer (FTM) - 1x2ch quadrature decoder/general purpose/PWM flexible timer (FTM) - Carrier modulator timer (CMT) - Programmable delay block (PDB) - 1x4ch programmable interrupt timer (PIT) - Low-power timer (LPT) Communications - SPI - I2C with SMBUS support - UART (w/ ISO7816, IrDA and HW flow control) Human-machine interface - up to 44 GPIO Pin (pin interrupt support, DMA request capability) - Capacitive touch sensing inputs.