NXP Semiconductors MKS20FN256VLH12

Overview

MKS20FN256VLH12 from NXP Semiconductors is a 120 MHz ARM® Cortex®-M4 microcontroller with 256 KB flash, 64 KB SRAM, and single-precision FPU, designed for automotive and industrial control systems requiring CAN 2.0B communication, low-power operation down to –40 °C to 105 °C, and integrated analog peripherals including 16-bit ADC (14 SE/2 DP channels) and 12-bit DAC.

For engineers reviewing the MKS20FN256VLH12 datasheet, MKS20FN256VLH12 pinout, MKS20FN256VLH12 application, or MKS20FN256VLH12 equivalent, key selection criteria include its single FlexCAN interface, 64-pin LQFP package with 40 GPIOs, USB FS OTG with crystal-less operation, and support for VLPS/LLS low-power modes with RTC and LPTMR wake-up capability.

Technical Context

The MKS20FN256VLH12 implements an ARM Cortex-M4 core with DSP extensions and hardware FPU, delivering 1.25 DMIPS/MHz at 120 MHz. Its memory subsystem includes 256 KB of embedded flash (2 KB pages) with flash access control (FAC) and 64 KB SRAM split into upper/lower banks, both accessible at full CPU clock speed with zero wait states.

System-level timing is managed by the Multi-Purpose Clock Generator (MCG) supporting FLL, PLL, and internal oscillators (32 kHz, 4 MHz, 48 MHz), enabling dynamic clock scaling across HSRUN/RUN/VLPR operational modes. Peripheral clocking is granularly gated via SIM module registers, with dedicated clocks for USB (IRC48MCLK), ADC (OSCERCLK/IRC48MCLK), and FlexCAN (bus clock).

Key Specifications

Pinout & Package

Package: 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch), JEDEC MS-026AC, thermal pad exposed (package drawing 98ASS23234W). Pin count and I/O mapping match KS20 family specification for VLH suffix.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MKS20FN256VLH12, MKS20FN128VLH12 reduces flash capacity but maintains identical low-power behavior and pin compatibility, while MKS22FN256VLH12 extends CAN and ADC capability at the cost of increased silicon complexity-neither is pin-compatible nor drop-in replaceable without firmware and layout review.

Availability

MKS20FN256VLH12 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, smart energy meter gateways, and medical infusion pump controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MKS20FN256VLH12 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The MKS20FN256VLH12 belongs to the Kinetis KS20 microcontroller family, engineered for deterministic real-time control in resource-constrained, safety-aware environments where CAN integration, analog precision, and ultra-low-power operation are critical.

FAQ

What is the maximum operating frequency of the MKS20FN256VLH12?

The MKS20FN256VLH12 operates at a maximum core frequency of 120 MHz using the ARM Cortex-M4 processor with integrated single-precision floating-point unit. This frequency is achieved via the MCG's PLL configuration with an external crystal or internal reference clock, and is validated across the full –40 °C to 105 °C temperature range and 1.71–3.6 V supply voltage.

Does the MKS20FN256VLH12 support crystal-less USB operation?

Yes, the MKS20FN256VLH12 supports crystal-less USB Full-Speed OTG 2.0 operation using its internal 48 MHz IRC48M oscillator. This eliminates the need for an external 48 MHz crystal, simplifying board design and reducing component count while maintaining USB compliance for device enumeration and data transfer up to 12 Mbit/s.

How many CAN interfaces does the MKS20FN256VLH12 include?

The MKS20FN256VLH12 includes exactly one FlexCAN module compliant with ISO 11898-1 and CAN 2.0B protocol specifications. This is confirmed in the functional block diagram footnote and ordering table, distinguishing it from the KS22 variant which provides two FlexCAN channels. The single CAN interface supports standard and extended frame formats with programmable bit timing.

What analog-to-digital converter resolution and speed does the MKS20FN256VLH12 offer?

The MKS20FN256VLH12 integrates a 16-bit successive-approximation ADC with up to 14 single-ended or 2 differential input channels. It achieves up to 1.2 million samples per second at ≤13-bit effective resolution, with configurable sample time, hardware averaging, and programmable offset/gain calibration-all accessible without CPU intervention via DMA or PDB triggering.

Is the MKS20FN256VLH12 pin-compatible with other KS20 or KS22 variants in the same package?

No, the MKS20FN256VLH12 is not fully pin-compatible with KS22 variants (e.g., MKS22FN256VLH12) despite sharing the same 64-pin LQFP package. Differences in peripheral mapping-particularly the absence of ADC0_DP2/DP3 and second FlexCAN signals-mean that direct substitution requires signal reassignment and firmware adaptation. Pin compatibility is only guaranteed within the same KS20 subfamily (e.g., MKS20FN256VLH12 ↔ MKS20FN128VLH12).