NXP Semiconductors MK21FN1M0AVMD12

Overview

MK21FN1M0AVMD12 from NXP Semiconductors (formerly Freescale) is a 120 MHz ARM Cortex-M4 microcontroller with FPU, 1 MB flash, 128 KB SRAM, DryIce tamper detection, USB LS/FS OTG 2.0 with integrated 3.3 V/120 mA LDO, and CAN interface - designed for secure, low-power electronic point-of-sale terminals.

For engineers reviewing the MK21FN1M0AVMD12 datasheet, MK21FN1M0AVMD12 pinout, MK21FN1M0AVMD12 application, or MK21FN1M0AVMD12 equivalent, this page delivers verified specifications, validated package mapping, confirmed peripheral integration (USB OTG + CAN + dual 16-bit ADC), and real-world use context for tamper-resistant embedded control.

Technical Context

The MK21FN1M0AVMD12 implements an ARM Cortex-M4 core with hardware floating-point unit and DSP extensions, operating up to 120 MHz in PEE clock mode. It integrates DryIce security subsystem with active/passive tamper pins, temperature, clock, and supply voltage monitoring - enabling certified anti-tamper operation in EPOS systems.

Its mixed-signal architecture includes two independent 16-bit SAR ADCs (1 MSPS), two 12-bit DACs, three analog comparators, and a programmable delay block. Communication is supported by six UARTs, three SPIs, three I²Cs, SDHC, I²S, and a Controller Area Network (CAN) module compliant with ISO 11898-1.

Key Specifications

Pinout & Package

Package: 121-pin MAPBGA (8 mm × 8 mm, 0.65 mm pitch, 1.4 mm height). Pinout conforms to K21F family assignment per Document K21P121M120SF5V2 Rev 4, Section 5.2 - including dedicated Tamper pins (TAMPER0–TAMPER3), USB0_DP/DM, CAN0_TX/RX, and dual ADC reference inputs (ADC0_VREFH/L, ADC1_VREFH/L).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with MK21FN1M0AVMD12, MK21FX512AVMC12 offers identical security and interface capability at lower memory density, while KE17Z64VLH4 sacrifices tamper detection, USB OTG, and processing performance for cost and package simplicity - making MK21FN1M0AVMD12 the sole option for PCI-compliant EPOS with full feature retention.

Availability

MK21FN1M0AVMD12 is available at Aetrix Electronics and suitable for electronic point-of-sale terminals, secure payment devices, and industrial HMI controllers requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MK21FN1M0AVMD12 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in ARM-based microcontrollers and embedded security.

The Kinetis K21F product line was engineered specifically for cost-sensitive, tamper-resistant applications such as electronic point-of-sale systems - integrating DryIce security, USB OTG, and low-power operation in a single die.

FAQ

What is the maximum operating frequency of the MK21FN1M0AVMD12 core?

The MK21FN1M0AVMD12 features an ARM Cortex-M4 core with FPU that operates at up to 120 MHz in PEE clock mode. This frequency is achievable with the internal PLL locked to a 3–32 MHz crystal oscillator input, and it delivers 1.25 Dhrystone MIPS per MHz for deterministic real-time performance in payment terminal firmware.

Does the MK21FN1M0AVMD12 include hardware-based tamper detection?

Yes, the MK21FN1M0AVMD12 integrates the DryIce tamper detection module, which monitors active and passive tamper pins, die temperature, supply voltage, and system clock integrity. Any violation triggers immediate secure key erasure and system lockdown - a critical requirement for PCI PTS v5.0 certification in EPOS devices.

What USB functionality does the MK21FN1M0AVMD12 support?

The MK21FN1M0AVMD12 supports USB 2.0 Full-Speed and Low-Speed On-The-Go (OTG) operation with an integrated 3.3 V, 120 mA LDO regulator. It includes USB Device Charger Detect (DCD) and complies with USB 2.0 specification - enabling self-powered operation and direct connection to PCs or charging ports without external regulators.

What is the lowest power consumption mode available on the MK21FN1M0AVMD12?

The MK21FN1M0AVMD12 achieves 268 nA in Very-Low-Leakage Stop Mode 0 (VLLS0) with full SRAM and register retention and 5 μs wakeup time. This mode maintains cryptographic keys and session state during battery-backed sleep - essential for offline transaction capability in portable payment terminals.

Which analog peripherals are integrated into the MK21FN1M0AVMD12?

The MK21FN1M0AVMD12 integrates two independent 16-bit SAR ADCs (1 MSPS), two 12-bit DACs, three analog comparators (CMP), and a precision voltage reference. These support simultaneous high-resolution sensor acquisition and analog output generation - used in EPOS for environmental monitoring, display bias control, and biometric signal conditioning.