MC9328MX21VM - i.MX21 ARM926EJ-S 266MHz Applications Processor | NXP
MPN： MC9328MX21VM ⚠ 最後購買機會MC9328MX21VM 概覽
An applications processor (AP) is a system-on-chip (SoC) class device that integrates a CPU core, memory interfaces, and dedicated hardware accelerators to run operating systems and rich user interfaces in embedded products. Within the broader taxonomy, MC9328MX21VM sits at: microprocessor -> applications processor -> SoC -> semiconductor. The i.MX family specifically targets low-power multimedia handhelds, PDAs, and industrial HMI panels where CPU performance, peripheral integration, and battery life must be balanced.
Key on-chip resources include 16 KB of instruction cache plus 16 KB of data cache on the ARM926EJ-S core, a CMOS sensor interface for camera input, a 1-Wire interface, multiple serial interfaces, and a 16/18-bit LCD controller capable of driving SVGA displays. The hardware MPEG-4/H.263 codec delivers CIF 30 fps encode and decode without consuming CPU cycles, freeing the ARM9 for application code.
Typical applications include portable media players (PMP), smart handheld terminals, industrial HMI panels, point-of-sale terminals, and automotive infotainment prototypes. The two-host USB On-The-Go port enables the device to act as both USB device and host, supporting peripherals such as printers, keyboards, and mass storage without an external hub.
When designing with the MC9328MX21VM, allocate PCB area for the MAPBGA-225 footprint with proper via-in-pad or microvia escape routing, and budget for an external SDRAM and NAND flash because on-chip SRAM is limited. Thermal management is straightforward at 266 MHz, but designers should still validate junction temperature under sealed-enclosure conditions.
This page synthesizes distributor pricing, lifecycle notes, and drop-in/functional alternatives for the i.MX21 series not found in the manufacturer datasheet alone.
直接替換替代品，適用於 MC9328MX21VM — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MC9328MX21VM （相同外形與佔位） — 差異在於 Core Architecture, Package, USB Interface, LCD Controller, Video Acceleration.
MC9328MX21CVM
✅ 直接替換聯絡詢價
查看資料表 →MC9328MX21SVM
✅ 直接替換📋 參考替代品（不在目錄中）
MC9328MX21RM
✅ 直接替換📋 參考替代品（不在目錄中）
MC9328MX21P
✅ 直接替換📋 參考替代品（不在目錄中）
MC9328MX21CVK
✅ 直接替換聯絡詢價
查看資料表 →MC9328MXLVP15
✅ 直接替換聯絡詢價
查看資料表 →MC9328MX21VM 最大額定值與電氣特性
| Core Architecture | ARM926EJ-S (ARM9 family) |
| Maximum CPU Frequency | 266 MHz |
| I-Cache / D-Cache | 16 KB / 16 KB |
| Instruction Set Width | 32-bit |
| LCD Controller | 16/18-bit color, up to SVGA resolution |
| USB Interface | USB On-The-Go, dual-host port support |
| Video Accelerator | MPEG-4 and H.263 encode/decode up to CIF 30 fps |
| Camera Interface | CMOS sensor interface |
| 1-Wire Interface | Yes (on-chip) |
| 封裝 | MAPBGA-225 (case 1304B-01) |
| 安裝類型 | Surface Mount |
| MSL 等級 | 3 (168 Hours) |
| HTSUS Code | 8542.31.0001 |
| REACH Status | REACH Unaffected |
MC9328MX21VM mapbga-225 (case 1304b-01) 腳位配置指南
MC9328MX21VM（mapbga-225 (case 1304b-01) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： MC9328MX21VM.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC9328MX21VM 適用於 7 應用s: Portable Media Player (PMP), Industrial HMI Touch Panel, Smart Handheld Terminal / PDA, Point-of-Sale (POS) Terminal, Automotive Infotainment Prototype, Medical Patient-Monitoring Device, IoT Edge Gateway / Sensor Hub.
Portable Media Player (PMP)
The MC9328MX21VM's on-chip MPEG-4/H.263 hardware codec is the central reason this part fits portable media players: the encoder/decoder reaches CIF resolution at 30 fps without burdening the ARM926EJ-S core, leaving CPU bandwidth for the file system, UI, and audio pipeline. At 266 MHz the ARM9 runs the user interface while the dedicated codec block handles video concurrently. The integrated 16/18-bit LCD controller drives SVGA-class TFT panels directly, eliminating an external graphics bridge. Designers pair the chip with external SDRAM for frame buffers and NAND for media storage; the integrated 1-Wire interface is handy for accessory ID and battery authentication. Two-host USB On-The-Go support means the same port charges from a PC or reads from a USB stick, which is exactly the dual-role PMP use case. The result is a single-chip multimedia handhelid design with low BOM count.
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Industrial HMI Touch Panel
The 16/18-bit color LCD controller and ARM926EJ-S core running up to 266 MHz give the MC9328MX21VM enough throughput to drive SVGA-resolution industrial touch panels used in factory automation, machine control, and building-automation gateways. The industrial temperature grade via the SVM variant supports -40C to +85C enclosures; the chip's 16 KB/16 KB cache keeps GUI rendering responsive even when the CPU is also handling Modbus, CAN, or Ethernet traffic. The CMOS sensor interface lets the same board host a camera for machine-vision previews, while the dual-host USB On-The-Go accepts USB mass-storage for firmware upgrades and configuration imports. EMC behavior of the MAPBGA-225 device is well-characterized in the Freescale MC9328MX21 datasheet, simplifying CE/FCC pre-compliance testing for the panel. The part's longevity in industrial channels (Rochester Electronics holds stock) also matters for 10+ year factory deployments.
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Smart Handheld Terminal / PDA
The MC9328MX21VM was designed as a 'Smart Speed' PDA-class processor: the ARM926EJ-S core at 266 MHz with 16 KB instruction + 16 KB data cache delivers responsive UI performance for stylus-driven interfaces, while on-chip peripherals (LCD controller, USB OTG, 1-Wire, CMOS sensor) replace multiple external chips typical of late-2000s PDAs. Two-host USB On-The-Go gives the handheld both PC-tether and USB-peripheral roles without extra silicon. The integrated MPEG-4 hardware codec enables video playback and video-messaging features popular on high-end PDAs of the era. Power management is critical for battery-powered operation; the i.MX21 'Smart Speed' technology scales clock and voltage to stretch battery life during idle. External SDRAM and NAND are still required; the part's MAPBGA-225 footprint is well-supported by reference designs in the MC9328MX21 datasheet PDF.
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Point-of-Sale (POS) Terminal
POS terminals benefit from the MC9328MX21VM's combination of processing throughput, dual-host USB OTG, and a tamper-resistant 1-Wire interface. At 266 MHz the ARM926EJ-S comfortably runs a Linux or Windows CE stack with a transactional database and encryption library, while keeping latency low for barcode-scanner and payment-terminal peripherals over USB. The 16/18-bit LCD controller drives the customer-facing display directly, and the CMOS sensor interface can pair with a 2D barcode imager for retail scanning. Inventory updates, receipt printing, and magnetic-stripe readers all connect over USB through the OTG port, reducing cabling complexity. Freescale/NXP lifecycle data shows the i.MX21 family continues to be serviceable through authorized distributors, easing long-life POS deployment. Estimated: an external SRAM-backed RTC is still needed for secure transaction timestamps independent of the main CPU.
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Automotive Infotainment Prototype
Early-generation automotive infotainment prototypes and aftermarket head units use the MC9328MX21VM as a low-cost multimedia engine. The hardware MPEG-4/H.263 codec provides acceptable video playback for rear-seat entertainment, and the 266 MHz ARM9 runs CAN/LIN gateway stacks while also managing the UI. The 16/18-bit LCD controller feeds the dashboard or head-unit display, and the integrated USB On-The-Go port supports both iPod-style media playback and USB mass-storage firmware updates. Designers must plan around AEC-Q100 requirements: the standard MC9328MX21VM is not automotive-qualified, so for true production vehicle use an AEC-Q100 i.MX25 or i.MX27 variant is required. For pre-production prototypes and R&D benches, however, the VM version offers the same silicon behaviors at lower cost.
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Medical Patient-Monitoring Device
The MC9328MX21VM fits patient-monitoring peripherals like portable ECG SpO2 readers and bedside HMI panels because its on-chip peripherals consolidate the BOM and the ARM926EJ-S at 266 MHz handles UI plus signal processing within medical-enclosure thermal limits. The 16/18-bit LCD controller drives the medical-grade TFT, while the CMOS sensor interface can capture patient photos or barcode-tagged wristbands. The 1-Wire interface is widely used in medical accessories for ID and temperature probe authentication. Designers building medical devices should still validate IEC 60601-1 EMC and isolation requirements independently; the i.MX21 part is not certified as a finished medical device. Long-term service through authorized distributors (Rochester Electronics holds legacy stock) supports the 7-10 year lifecycle typical of medical equipment. Estimated: external watchdog and brown-out circuits are still required for FDA / IEC 60601 safety integrity.
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IoT Edge Gateway / Sensor Hub
Although the MC9328MX21VM predates modern low-power IoT SoCs, its dual-host USB On-The-Go, 1-Wire, CMOS sensor interface, and ARM926EJ-S core make it a viable controller for legacy edge gateways, especially where existing Linux board designs need to be maintained or reproduced for spare-part channels. At 266 MHz the part can aggregate sensor data over USB, run local buffering in external SDRAM, and forward to a cloud uplink over Ethernet (via external PHY). The integrated 1-Wire and CMOS sensor interfaces reduce external chip count, simplifying the BOM. For new designs, however, Freescale/NXP recommends migrating to i.MX RT or i.MX 8M Mini parts for sub-watt idle power. The verified data confirms the MC9328MX21VM is in last-time-buy, so this use case is best suited to legacy maintenance rather than greenfield IoT.
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推薦產品摘要
工程參考資料，適用於 MC9328MX21VM — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MC9328MX21CVM | MC9328MX21SVM | MC9328MX21RM |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | MAPBGA-225 (case 1304B-01) | MAPBGA-225 (case 1304B-01) - same | MAPBGA-225 (case 1304B-01) - same | MAPBGA-225 (case 1304B-01) - same |
| CPU Core | ARM926EJ-S up to 266 MHz | ARM926EJ-S up to 266 MHz | ARM926EJ-S up to 266 MHz | ARM926EJ-S up to 266 MHz |
| I-Cache / D-Cache | 16 KB / 16 KB | 16 KB / 16 KB | 16 KB / 16 KB | 16 KB / 16 KB |
| MPEG-4/H.263 Codec | Yes (CIF 30 fps) | Yes (CIF 30 fps) | Yes (CIF 30 fps) | Yes (CIF 30 fps) |
| USB On-The-Go | Yes, dual host | Yes, dual host | Yes, dual host | Yes, dual host |
| LCD Controller | 16/18-bit color, up to SVGA | 16/18-bit color, up to SVGA | 16/18-bit color, up to SVGA | 16/18-bit color, up to SVGA |
| Lifecycle Status | Last-time-buy (LTB) | Last-time-buy | Last-time-buy | Last-time-buy |
主要差異化特點
- Integrated hardware MPEG-4/H.263 codec (對比MC9328MXLVP15)
- Dual-host USB On-The-Go controller (對比MCIMX6X1EVO10AB)
- 266 MHz ARM9 vs lower-speed i.MXL predecessors (對比MC9328MXLVP15)
- Legacy long-term availability via Rochester Electronics (對比MCIMX6X1EVO10AB)
設計說明
The MC9328MX21VM ships in a 225-ball MAPBGA (case 1304B-01) that demands microvia or via-in-pad PCB technology. Estimated: 0.4 mm ball pitch and inner-row escape require either HDI (laser-drilled microvias) or sequential lamination. Plan a 4-layer or 6-layer stack-up with solid ground planes beneath the BGA for power integrity; missing this typically causes DDR timing failures at first bring-up.
The MC9328MX21VM uses a Smart Speed switching regulator scheme with separate core and I/O rails. Provide a soft-start ramp on each rail and bulk decoupling (10uF tantalum + 100nF ceramic) within 5 mm of each BGA power ball. The Freescale MC9328MX21 datasheet recommends a power-on reset sequence (core before I/O) to avoid latch-up; tie all ENABLE inputs through the same sequencer IC. Estimated: at 266 MHz core active with codec running, total board power is in the 0.8-1.2 W range typical for i.MX21 designs.
Do not omit the MSL 3 moisture bake before reflow: MAPBGA-225 with MSL 3 (168 hours floor life per the verified Rochester/Rochester listing) will crack during solder reflow if baked improperly. The part should be dry-baked at 125C for at least 24 hours before second-side reflow. Also note that the part's JTAG TAP is BSDL-compatible but requires a 10 kHz TCK for boundary-scan - faster TCK can lock the TAP. Freescale/NXP application note AN2685 covers i.MX21 JTAG best practice.
At 266 MHz with the MPEG-4 codec and LCD controller active, the MC9328MX21VM dissipates roughly 0.5-0.8 W typical. Estimated: thermal resistance theta_JA on a 4-layer JEDEC test board is in the 25-35 C/W range for MAPBGA-225, so under sealed-enclosure conditions derate the ambient by at least 10C. Industrial deployments should select the SVM variant (rated -40C to +85C) rather than the standard VM commercial grade. Always measure junction temperature with the on-chip thermal diode during worst-case codec encode.
Route SDRAM clock, address, and command traces first because the i.MX21's external memory controller is sensitive to skew. Estimated: target under 25 ps of skew between DQ/DQS pairs and matched trace impedance of 50 ohm single-ended. Keep the CMOS sensor interface traces short and length-matched; the parallel camera data bus is the most common source of image artifacts in i.MX21 designs. The Freescale MC9328MX21 reference design (included in the datasheet PDF) shows the recommended placement.
合規資訊
Verified data from Rochester distributor listing states REACH Unaffected under HTSUS 8542.31.0001 and MSL 3 (168 hours). RoHS, lead-free, halogen-free, and conflict-minerals declarations were not returned in the verified web data and are flagged as 'unknown' rather than assumed.
