K20: Kinetis K20 Low-Power Mixed-Signal MCU from Freescale

Kinetis is the most scalable portfolio of low power, mixed-signal ARM Cortex-M4 MCUs in the industry. Phase 1 of the portfolio consists of fve MCU families with over 200 pin-, peripheral- and software-compatible devices. Each family offers excellent performance, memory and feature scalability with common peripherals, memory maps, and packages providing easy migration both within and between families.

The K20 MCU family is pin, peripheral and software compatible with the K10 MCU family and adds full and high-speed USB 2.0 On-The-Go with device charge detect capability. Devices start from 32 KB of flash in 5 x 5 mm 32QFN packages extending up to 1 MB in a 144MAPBGA package with a rich suite of analog, communication, timing and control peripherals. High memory density K20 family devices include a single precision floating point unit and NAND flash controller.

Common features among the K20 family

• Operating characteristics
  • Voltage range 1.71V - 3.6V
  • Flash memory programming down to 1.71V
  • Temperature range (TA) -40 to 105°C
  • Flexible modes of operation
• Core features
  • Next generation 32-bit ARM Cortex-M4 core
  • Supports DSP instructions
  • Nested vectored interrupt controller (NVIC)
  • Asynchronous wake-up interrupt controller (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
  • Software and hardware watchdog with external monitor pin
  • DMA controller with 16 channels
  • Low-leakage wake-up unit (LLWU)
  • Power management controller 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 (32kHz or 2MHz)
  • 12MHz to 32MHz crystal oscillator
  • 32kHz to 40kHz crystal oscillator
  • Internal 1kHz low power oscillator
  • DC to 50MHz external square wave input clock
• Memories and Memory Interfaces
  • FlexMemory consisting of FlexNVM (non-volatile flash memory that can execute program code, store data, or backup EEPROM data) or FlexRAM (RAM memory that can be used as traditional RAM or as high-endurance EEPROM storage, and also accelerates flash programming)
  • 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
  • 1×8ch motor control/general purpose/PWM flexible timer (FTM)
  • 1×2ch quadrature decoder/general purpose/PWM flexible timer (FTM)
  • Carrier modulator timer (CMT)
  • Programmable delay block (PDB)
  • 1×4ch programmable interrupt timer (PIT)
  • Low-power timer (LPT)
• Communications
  • SPI
  • I2C with SMBUS support
  • UART (w/ ISO7816, IrDA and hardware flow control)
  • USB 2.0 On-The-Go (full and high speed). Device charge detect optimizes charging current/time for portable USB devices enabling longer battery life. Low-voltage regulator supplies up to 120 mA off chip at 3.3V to power external components from 5V input
• Human-machine interface
  • GPIO with pin interrupt support, DMA request capability, digital glitch filter, and other pin control options
  • Capacitive touch sensing inputs

K20 Block Diagram

 Memory and package options for the K20 family.
The following table summarizes the memory and package options for the K20 family. All devices which share a common package are pin-for-pin compatible. 

Perf. (MHz)	Memory				Package
	Flash (KB)	Flex NVM (KB)	Flex RAM (KB)	SRAM (KB)	32 QFN	48 QFN	48 LQFP	64 QFN	64 LQFP	80 LQFP	81 BGA	100 LQFP	104 BGA	144 LQFP	144 BGA
50	32	-	-	8	+	+	+	+	+	+	+	-	-	-	-
	64	-	-	16	+	+	+	+	+	+	+	-	-	-	-
	32	32	2	8	+	+	+	+	+	+	+	-	-	-	-
	64	32	2	16	+	+	+	+	+	+	+	-	-	-	-
	128	32	2	32	-	-	-	+	+	+	+	+	+	-	-
72	128	32	2	32	-	-	-	+	+	+	+	+	+	-	-
	256	32	4	64	-	-	-	-	-	+	+	+	+	-	-
100	128	128	4	32	-	-	-	-	-	-	-	-	-	+	+
	256	256	4	64	-	-	-	-	-	-	-	-	-	+	+
	512	-	-	128	-	-	-	-	-	+	+	+	+	+	+
120	512	512	16	128	-	-	-	-	-	-	-	-	-	+	+
150	512	512	16	128	-	-	-	-	-	-	-	-	-	+	+
120	1024	-	-	128	-	-	-	-	-	-	-	-	-	+	+
150	1024	-	-	128	-	-	-	-	-	-	-	-	-	+	+

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