Kinetis® K2x USB Microcontrollers (MCUs) based on Arm® Cortex®-M4 Core

The K2x MCU family integrates cost-effective Full-and High-speed USB 2.0 On-The-Go (OTG) with device charge detect capability and crystal-less functionality.

Kinetis K2x USB MCUs
CPU Communications Security
Sub-families Arm
Cortex-M4		 Memory USB
Controllers
I2S
CAN
RNG
Symmetric Crypto
Accelerator
Anti-tamper
K28
Dual-USBs,
Large memory &
PMC w/ Core
Voltage Bypass		 K28_150 150 MHz w/ FPU 2 MB Flash
1 MB SRAM
SDRAM Controller
QuadSPI XIP interface		 2x
Full-Speed Crystal-less +
High-Speed w/ HS PHY		 2
K27
Dual-USBs &
Large memory		 K27_150 150 MHz w/ FPU 2 MB Flash
1 MB SRAM
SDRAM Controller
QSPI interface		 2x
Full-Speed Crystal-less +
High-Speed w/ HS PHY		 2
K26
Dual-USBs &
Large Flash memory		 K26_180 180 MHz w/ FPU 2 MB Flash
256 KB SRAM
SDRAM Controller		 2x
Full-Speed Crystal-less +
High-Speed w/ HS PHY		 1 2
K24
Cost-effective & 256KB SRAM		 K24_120 120 MHz w/ FPU 256 KB - 1 MB Flash
256 KB SRAM		 1x
Full-Speed		 1 1* *
K22
Cost-effective		 K22_120 120 MHz w/ FPU 128 KB - 1 MB Flash
48 - 128 KB SRAM		 1x
Full-Speed Crystal-less*		 1 1* *
K22_100 100 MHz w/ FPU 128 KB Flash
24 KB SRAM		 1x
Full-Speed Crystal-less		 1 1*
K22_50 50 MHz 192 - 512 KB Flash
32 - 64 KB SRAM		 1x
Full-Speed		 1 1*
K21
Advanced Security		 K21_120 120 MHz w/ FPU 640 KB – 1 MB Flash
128 KB SRAM		 1x
Full-Speed		 1 1*
K21_50 50 MHz 192 - 512 KB Flash
32 - 64 KB SRAM		 1x
Full-Speed		 1 1*
K20
High Mixed-signal
integration		 K20_120 120 MHz w/ FPU 512 KB – 1 MB Flash
128 KB SRAM
NAND Controller		 2x
Full-Speed + High-Speed		 2* 2*
K20_100 100 MHz 256 - 512 KB Flash
32 - 128 KB SRAM		 1x
Full-Speed		 2* 2*
K20_72 72 MHz 96 - 288 KB Flash
16 - 64 KB SRAM		 1x
Full-Speed		 2* 2*
K20_50 50 MHz 32 - 160 KB Flash
8 - 16 KB SRAM		 1x
Full-Speed		 2* 2*

* Feature only supported by a subset family

  • RNG: Random Number Generator
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Kinetis K2x USB MCU Family

The Kinetis K series MCU portfolio offers the broadest selection of pin-, peripheral-and software-compatible MCU families based on the Arm Cortex-M4 core.