NXP Semiconductors MCIMX31LCVMN4D

Overview

MCIMX31LCVMN4D from NXP Semiconductors (formerly Freescale) is a low-power, industrial-grade ARM1136JF-S™ multimedia applications processor operating at 400 MHz, featuring 16 KB instruction and 16 KB data L1 caches, 128 KB unified L2 cache, 32 KB ROM, and 16 KB SRAM. It integrates an MPEG-4 hardware encoder (VGA @ 30 fps), Image Processing Unit (IPU), Vector Floating Point (VFP11) co-processor, and SDMA controller - deployed in automotive infotainment and industrial HMI systems.

For engineers reviewing the MCIMX31LCVMN4D datasheet, MCIMX31LCVMN4D pinout, MCIMX31LCVMN4D application, or MCIMX31LCVMN4D equivalent, key selection criteria include its –40°C to +85°C extended temperature rating, absence of GPU (distinguishing it from MCIMX31C variants), dual-Vt 90 nm process, DVFS support, and MAPBGA-473 19×19 mm 0.8 mm pitch package compatibility with industrial PCB layouts.

Technical Context

The MCIMX31LCVMN4D implements the ARM v6 architecture with Jazelle® Java acceleration, Thumb® instruction set, and SIMD DSP extensions. Its memory subsystem includes L1 caches with Hit-Under-Miss capability, a 64-bit AMBA L2 interface, and integrated EMI supporting DDR, NAND Flash, NOR Flash, SDRAM, and SRAM.

Power management relies on dynamic voltage and frequency scaling (DVFS), independent clock/power domain gating, and power gating for ARM/L2 caches. Silicon Revision 2.0.1 adds iROM updates enabling boot from USB HS and SD/MMC - a functional distinction from Revision 2.0 parts.

Key Specifications

Pinout & Package

MCIMX31LCVMN4D uses a 473-ball MAPBGA package (Case 1931), 19 × 19 mm body size, 0.8 mm ball pitch, RoHS-compliant and lead-free. Ball assignment follows JEDEC MO-251, with dedicated power/ground arrays, configurable I/O banks (NVCC1–NVCC10), and function-multiplexed signals including USB OTG, SDHC, CSPI, I²C, UART, SSI, and GPIO groups.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCIMX31LCVMN4D, the i.MX6ULL offers significantly higher compute throughput and modern GPU support but demands more complex power design and software stack investment, while the MCIMX353DJQ5C provides incremental ARM11 performance uplift and GPU capability within a mechanically similar package - making it the closest functional upgrade path for existing MCIMX31L-based designs.

Availability

MCIMX31LCVMN4D is available at Aetrix Electronics and suitable for automotive infotainment, industrial HMI, portable medical terminals, and ruggedized data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MCIMX31LCVMN4D 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 applications, with deep expertise in ARM-based application processors and edge computing.

The i.MX31 family - including MCIMX31LCVMN4D - was engineered specifically for cost-sensitive, low-power industrial and automotive multimedia applications requiring extended temperature operation, hardware-accelerated video, and robust security features without GPU overhead.

FAQ

What is the key functional difference between MCIMX31LCVMN4D and MCIMX31CVMN4D?

The MCIMX31LCVMN4D omits the Graphics Processing Unit (GPU) present in the MCIMX31CVMN4D. This reduces silicon area, power consumption, and cost - making MCIMX31LCVMN4D ideal for applications needing video encoding and image processing (via IPU) but not 2D/3D graphics acceleration. All other modules - ARM1136JF-S core, MPEG-4 encoder, VFP11, SDMA, and peripheral sets - are identical between the two silicon revisions.

Does MCIMX31LCVMN4D support boot from SD card or USB host?

Yes. MCIMX31LCVMN4D (Silicon Revision 2.0.1) includes updated iROM that explicitly supports boot from USB High-Speed and SD/MMC interfaces. This capability is confirmed in Table 1 and Section 1.2.1 of the MCIMX31C/MCIMX31LC Technical Data Rev. 4.3 datasheet and enables field-upgradable firmware without requiring JTAG or SPI flash programming.

What are the critical power sequencing requirements for MCIMX31LCVMN4D?

MCIMX31LCVMN4D requires strict power-up sequencing: QVCC/QVCC1/QVCC4 must ramp before NVCC supplies, and all core rails must stabilize before releasing reset. The datasheet specifies minimum ramp rates and hold times - e.g., QVCC must reach ≥1.22 V before NVCC1 rises, and power-down must follow reverse order. Failure to comply risks corrupted boot or latch-up. A dedicated PMIC like the MC34708 is recommended for compliance.

Is MCIMX31LCVMN4D pin-compatible with other i.MX31 variants?

Yes - MCIMX31LCVMN4D shares the identical MAPBGA-473 19×19 mm package and ball map with all MCIMX31C and MCIMX31LC variants listed in Table 1 (e.g., MCIMX31CVMN4C, MCIMX31LCJMN4D). Pin functions, power domains, and signal multiplexing are consistent across the family, enabling hardware reuse across C/LC and Revision 2.0/2.0.1 parts with only firmware and power delivery adjustments.

What thermal management guidance applies to MCIMX31LCVMN4D in industrial enclosures?

For MCIMX31LCVMN4D operating at full 400 MHz in a sealed industrial enclosure, JEDEC testing shows RθJA = 29°C/W on a 4-layer board. To maintain Tj ≤ 105°C at 85°C ambient, total power dissipation must stay below ~690 mW. This requires careful layout (thermal vias under package center), minimal adjacent heat sources, and optional copper pour on inner layers - especially critical in fanless deployments.