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Freescale Semiconductor, Inc. Data Sheet: Technical Data
Document number: K21P121M50SF4V2 Rev 6, 04/2014
Kinetis K21D Sub-Family Data Sheet
50 MHz ARM® Cortex®-M4-based Microcontroller
The K21 product family members are optimized for cost-sensitive applications requiring low-power, USB connectivity, processing efficiency and the need for extensive tamper protection, such as Electronic Point of Sales. This device shares the comprehensive enablement and scalability of the Kinetis family.
This product offers: • Up to 512 KB of flash memory with up to 64 KB of SRAM • DryIce Tamper Detection with active/passive pin, temperature, clock, supply voltage monitoring • Run power consumption down to 189 μA/MHz and Static power consumption down to 3.1 μA with full state retention and 6 μs wakeup.