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Home > Products > Integrated Circuits (ICs) > Embedded > Microprocessors

NXP Semiconductors MC9328MX21VK

Name: MC9328MX21VK
Brand: NXP Semiconductors
SKU: MC9328MX21VK
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC9328MX21VK

Manufacturer:: NXP Semiconductors

Category:: Microprocessors

Package:: 289-LFBGA

Datasheet:: MC9328MX21VK.pdf

Description:: IC MPU I.MX21 266MHZ 289LFBGA

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Product details

Overview

MC9328MX21VK from Freescale Semiconductor is an ARM926EJ-S™-based microprocessor operating at 266 MHz, packaged in a 289-pin MAPBGA (14 mm × 14 mm, 0.65 mm pitch), designed for smartphone and portable multimedia applications. It integrates an LCD controller, USB On-The-Go, NAND Flash controller with hardware ECC, CMOS sensor interface, and dual MMC/SD host controllers.

For engineers reviewing the MC9328MX21VK datasheet, MC9328MX21VK pinout, MC9328MX21VK application, or MC9328MX21VK equivalent, key selection considerations include its 266 MHz ARM926EJ-S core, integrated video acceleration, SDRAM/NAND/PCMCIA memory expansion support, and industrial temperature range (0°C to 70°C) in lead-free packaging.

Technical Context

The MC9328MX21VK implements a full ARM926EJ-S core with Jazelle® Java acceleration, coupled with a dedicated enhanced Multimedia Accelerator (eMMA) for video pre/post-processing. Its memory subsystem includes a 32-bit SDRAM controller, 32-bit EIM bus interface, and NAND Flash controller with on-the-fly ECC correction.

Peripheral integration follows a multi-muxed I/O architecture: all major interfaces-including USB OTG, three CSPIs, two SSIs, two MMC/SD hosts, UARTs, I²C, 1-Wire, and CSI-share pins via programmable function multiplexing controlled by the FMCR register. Clock generation uses internal PLLs driven by 26 MHz and 32.768 kHz crystal inputs.

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	ARM926EJ-S 32-bit RISC processor with Jazelle Java acceleration and MMU support.
Max Operating Frequency	266 MHz - enables real-time multimedia processing without external co-processors.
Memory Interface	32-bit SDRAM controller + External Interface Module (EIM) supporting NOR/NAND/PSRAM/CF/PCMCIA.
NAND Flash Support	Integrated NAND Flash Controller with hardware ECC and parity checking - offloads CPU during storage access.
USB Interface	USB 2.0 On-The-Go (OTG) + two USB Host ports - supports device/host dual-role and peripheral expansion.
Display & Imaging	LCD controller (18-bit RGB/TFT), Smart LCD controller (SLCDC), and CMOS Sensor Interface (CSI) - enables direct camera and display connectivity.
Package	289-pin MAPBGA, 14 mm × 14 mm, 0.65 mm pitch, lead-free - suitable for compact handheld PCB layouts.

Pinout & Package

MC9328MX21VK is housed in a 289-pin MAPBGA package (14 mm × 14 mm, 0.65 mm ball pitch), with signal multiplexing across five functional banks (A–E). Pin functions are dynamically assigned via the Function Multiplexing Control Register (FMCR); no fixed single-function pinout exists. Critical dedicated signals include RESET_IN, EXTAL26M, EXTAL32K, SDCLK, SDRAM DQM/CS/RAS/CAS, and USB OTG differential pairs (USBG_RXDP/DM, USBG_TXDP/DM).

Pin/Terminal	Circuit Role	Design Meaning
RESET_IN	Master reset input	Active-low Schmitt-trigger input that resets all modules except SDRAMC, clock control, and reset module.
EXTAL26M / XTAL26M	26 MHz crystal oscillator interface	Differential crystal input/output pair driving internal PLLs; supports external 16–32 MHz square-wave source if oscillator disabled.
EXTAL32K / XTAL32K	32.768 kHz RTC crystal interface	Low-power crystal input/output for real-time clock operation during standby modes.
SDCLK / SDRAS / SDCAS / SDWE	SDRAM timing control	Directly drive synchronous DRAM chips; SDCLK is phase-aligned with internal system clocks for timing closure.
USBG_RXDP / USBG_RXDM / USBG_TXDP / USBG_TXDM	USB OTG differential data lanes	Full-speed (12 Mbps) USB 2.0 physical layer signals compliant with USB specification; require controlled 90 Ω differential impedance routing.

Key Features

Feature	Design Value
ARM926EJ-S Core + Jazelle	Enables efficient execution of Java bytecode in embedded UI layers without software interpreter overhead.
Hardware NAND ECC Engine	Corrects up to 4-bit errors per 512-byte sector in real time, eliminating CPU intervention during flash read/write operations.
Dual MMC/SD Host Controllers	Supports simultaneous SDIO Wi-Fi/BT and SD memory card operation with independent DMA channels.
CMOS Sensor Interface (CSI)	Accepts raw Bayer or YUV video streams from image sensors at up to 27 MHz pixel clock, feeding eMMA for hardware preprocessing.
USB On-The-Go + Dual Host	Allows single-port role switching between device (e.g., mass storage) and host (e.g., USB keyboard/mouse), plus two additional fixed-host ports.
Smart LCD Controller (SLCDC)	Drives serial SLCD panels directly via SPI-like interface, reducing external component count versus parallel RGB TFT solutions.

Applications

Smartphone Baseband & UI Processor	Digital Audio Player with Camera
Use Scenario: Main application processor in entry-level smartphones running Palm OS or Linux-based UI stacks with voice, messaging, and web browsing. IC Role / Device Role / Timing Role: System-on-chip host executing OS, managing peripherals (LCD, keypad, USB), and coordinating baseband communication via UART/CSPI. Use Value: Integrated USB OTG, NAND controller, and LCD driver reduce BOM cost and board area versus discrete companion IC solutions.	Use Scenario: Central media processor in portable MP3 players with integrated VGA camera and color TFT display. IC Role / Device Role / Timing Role: Real-time audio decode (via SSI/I²S), video capture (CSI), display rendering (LCDC), and storage management (NAND/MMC). Use Value: Hardware eMMA accelerator enables smooth MPEG-4 playback at 266 MHz without thermal throttling or external DSP.
Industrial Handheld Terminal	Medical Point-of-Care Display Device
Use Scenario: Ruggedized field terminal for asset tracking, barcode scanning, and wireless data upload in logistics environments. IC Role / Device Role / Timing Role: Controls 1D/2D barcode scanner interface (via GPIO/UART), manages secure SD card logging, and drives monochrome or color LCD. Use Value: PCMCIA/CF interface supports legacy peripheral expansion (e.g., RFID readers), while -30°C to 70°C variants (e.g., MC9328MX21DVK) ensure reliability in wide ambient conditions.	Use Scenario: Compact diagnostic display unit showing vital sign waveforms, patient records, and imaging thumbnails at hospital bedside. IC Role / Device Role / Timing Role: Renders high-fidelity graphics (via LCDC), handles touch input (keypad/GPIO), and communicates with sensors via I²C/1-Wire. Use Value: Integrated RTC, watchdog timer, and power control module enable deterministic low-power sleep/wake cycles critical for battery-operated medical devices.

Smartphone Baseband & UI Processor

Digital Audio Player with Camera

Use Scenario: Main application processor in entry-level smartphones running Palm OS or Linux-based UI stacks with voice, messaging, and web browsing.

IC Role / Device Role / Timing Role: System-on-chip host executing OS, managing peripherals (LCD, keypad, USB), and coordinating baseband communication via UART/CSPI.

Use Value: Integrated USB OTG, NAND controller, and LCD driver reduce BOM cost and board area versus discrete companion IC solutions.

Use Scenario: Central media processor in portable MP3 players with integrated VGA camera and color TFT display.

IC Role / Device Role / Timing Role: Real-time audio decode (via SSI/I²S), video capture (CSI), display rendering (LCDC), and storage management (NAND/MMC).

Use Value: Hardware eMMA accelerator enables smooth MPEG-4 playback at 266 MHz without thermal throttling or external DSP.

Industrial Handheld Terminal

Medical Point-of-Care Display Device

Use Scenario: Ruggedized field terminal for asset tracking, barcode scanning, and wireless data upload in logistics environments.

IC Role / Device Role / Timing Role: Controls 1D/2D barcode scanner interface (via GPIO/UART), manages secure SD card logging, and drives monochrome or color LCD.

Use Value: PCMCIA/CF interface supports legacy peripheral expansion (e.g., RFID readers), while -30°C to 70°C variants (e.g., MC9328MX21DVK) ensure reliability in wide ambient conditions.

Use Scenario: Compact diagnostic display unit showing vital sign waveforms, patient records, and imaging thumbnails at hospital bedside.

IC Role / Device Role / Timing Role: Renders high-fidelity graphics (via LCDC), handles touch input (keypad/GPIO), and communicates with sensors via I²C/1-Wire.

Use Value: Integrated RTC, watchdog timer, and power control module enable deterministic low-power sleep/wake cycles critical for battery-operated medical devices.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MC9328MX21VM	Larger 17 mm × 17 mm MAPBGA (0.8 mm pitch); same core, peripherals, and speed.	Suitable for designs requiring higher I/O fanout or relaxed routing density; not drop-in compatible due to different footprint.	Select MC9328MX21VM only when PCB layout accommodates larger package and thermal/mechanical constraints allow.
i.MX27 (MC9328MX27DK)	ARM926EJ-S core at 400 MHz; adds security engine, improved video encoder, and enhanced power management.	Targets higher-end multimedia devices needing H.264 encode/decode; requires updated BSP and driver stack.	Choose i.MX27 for new designs requiring higher performance or cryptographic acceleration; not a pin-compatible upgrade.

Compared with MC9328MX21VK, MC9328MX21VM offers identical functionality in a physically larger package for easier routing, while i.MX27 delivers higher clock speed and security features but demands full hardware and software revalidation.

Availability

MC9328MX21VK is available at Aetrix Electronics and suitable for smartphone UI platforms, portable media players, and industrial handheld terminals requiring stable component supply and long-term lifecycle support.

Supply support for MC9328MX21VK 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

Freescale Semiconductor (now part of NXP Semiconductors) was a leading designer of embedded processors, analog, and connectivity solutions for automotive, industrial, and consumer markets.

The i.MX21 product line was engineered specifically for cost-sensitive, battery-powered portable devices demanding rich multimedia capability with low active and standby power consumption.

FAQ

What is the maximum operating frequency of the MC9328MX21VK?

The MC9328MX21VK operates at a maximum frequency of 266 MHz using its ARM926EJ-S core. This speed is achieved via internal PLLs driven by the 26 MHz crystal input (EXTAL26M), and it represents the guaranteed performance limit under the 0°C to 70°C industrial temperature range specified for this variant.

Does the MC9328MX21VK support NAND Flash with hardware error correction?

Yes, the MC9328MX21VK includes a dedicated NAND Flash Controller with on-the-fly hardware ECC capable of correcting up to 4-bit errors per 512-byte sector. This eliminates CPU overhead during NAND read/write operations and improves system reliability in consumer-grade flash memory applications.

What display interfaces does the MC9328MX21VK provide?

The MC9328MX21VK provides three display-related interfaces: an 18-bit parallel LCD controller (LCDC) for RGB/TFT panels, a Smart LCD Controller (SLCDC) for serial SLCD panels, and a CMOS Sensor Interface (CSI) for direct connection to image sensors - enabling complete camera-to-display pipeline integration.

Is the MC9328MX21VK pin-compatible with other i.MX21 variants like MC9328MX21VM?

No, the MC9328MX21VK is not pin-compatible with MC9328MX21VM. Although both share identical signal functionality and electrical specifications, the MC9328MX21VK uses a 14 mm × 14 mm MAPBGA (0.65 mm pitch), whereas MC9328MX21VM uses a 17 mm × 17 mm MAPBGA (0.8 mm pitch) - requiring distinct PCB footprints and layout revisions.

What USB capabilities does the MC9328MX21VK offer?

The MC9328MX21VK integrates one USB 2.0 On-The-Go (OTG) port and two additional USB host ports (USBH1 and USBH2). The OTG port supports dual-role operation (device/host), while the host ports enable simultaneous connection of peripherals such as keyboards, mice, or storage devices - all with full-speed (12 Mbps) compliance.

MC9328MX21VK Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Package/Case:: 289-LFBGA

Series:: i.MX21

Packaging:: Tray

Product Status:: Obsolete

Core Processor:: ARM926EJ-S

Number of Cores/Bus Width:: 1 Core, 32-Bit

Speed:: 266MHz

Co-Processors/DSP:: -

RAM Controllers:: SDRAM

Graphics Acceleration:: No

Display & Interface Controllers:: Keypad, LCD

Ethernet:: -

SATA:: -

USB:: USB 1.x (2)

Voltage - I/O:: 1.8V, 3.0V

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Security Features:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 289-LFBGA (14x14)

Additional Interfaces:: 1-Wire, I2C, I2S, SPI, SSI, MMC/SD, UART

MC9328MX21VK FAQ

1.How can I place an order for MC9328MX21VK through Aetrix?

Please submit a Request for Quotation (RFQ) for MC9328MX21VK on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MC9328MX21VK reliable?

The price and inventory of MC9328MX21VK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9328MX21VK is usually 5 days.

3.What payment methods are accepted for MC9328MX21VK?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9328MX21VK transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC9328MX21VK?

MC9328MX21VK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC9328MX21VK order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MC9328MX21VK?

For technical support, including MC9328MX21VK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9328MX21VK requirements.

6.How does Aetrix verify that MC9328MX21VK is sourced from the original manufacturer or authorized distributors?

All MC9328MX21VK products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC9328MX21VK meets industry standards.

7.What is the process for return or replacement of MC9328MX21VK?

All MC9328MX21VK units undergo pre-shipment inspection (PSI). If there is an issue with MC9328MX21VK, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MC9328MX21VK part is unused and in its original packaging.

Return procedure for MC9328MX21VK:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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