1.1 Determining valid orderable parts Valid orderable part numbers are provided on the web. To determine the orderable part numbers for this device， go to freescale.com and perform a part number search for the following device numbers： KEAZN8. Part identification 2.1 Description Part numbers for the chip have fields that identify the specific part. You can use the values of these fields to determine the specific part you have received.

　　Key features ? Operating characteristics – Voltage range： 2.7 to 5.5 V – Flash write voltage range： 2.7 to 5.5 V – Temperature range （ambient）： -40 to 125°C ? Performance – Up to 48 MHz ARM? Cortex-M0+ core – Single cycle 32-bit x 32-bit multiplier – Single cycle I/O access port ? Memories and memory interfaces – Up to 8 KB flash – Up to 1 KB RAM ? Clocks – Oscillator （OSC） - supports 32.768 kHz crystal or 4 MHz to 24 MHz crystal or ceramic resonator; choice of low power or high gain oscillators – Internal clock source （ICS） - internal FLL with internal or external reference， 37.5 kHz pre-trimmed internal reference for 48 MHz system clock – Internal 1 kHz low-power oscillator （LPO） ? System peripherals – Power management module （PMC） with three power modes： Run， Wait， Stop – Low-voltage detection （LVD） with reset or interrupt， selectable trip points – Watchdog with independent clock source （WDOG） – Programmable cyclic redundancy check module （CRC） – Serial wire debug interface （SWD） – Aliased SRAM bitband region （BIT-BAND） – Bit manipulation engine （BME）