NXP Semiconductors MCIMX257CVM4

Overview

MCIMX257CVM4 from NXP Semiconductors (formerly Freescale) is an industrial-grade ARM926EJ-S applications processor operating at 400 MHz, integrating 128 KB on-chip SRAM, dual USB PHYs (HS OTG + FS Host), 10/100 Ethernet MAC, LCD controller with alpha blending, and touchscreen ADC-designed for HMI panels, patient monitors, and residential gateways.

For engineers reviewing the MCIMX257CVM4 datasheet, MCIMX257CVM4 pinout, MCIMX257CVM4 application, or MCIMX257CVM4 equivalent, key selection criteria include its –40°C to +85°C extended temperature rating, 17×17 mm 0.8 mm pitch MAPBGA-400 package, support for DDR2 up to 133 MHz, and integrated security features including DryIce tamper detection and secure boot.

Technical Context

The MCIMX257CVM4 implements a single ARM926EJ-S core with 16 KB L1 instruction and 16 KB L1 data cache, running at up to 400 MHz under 1.38–1.52 V core supply. It integrates a Smart DMA (SDMA) engine with 32 channels, two eSDHC controllers supporting SD/SDIO/MMC in 1-/4-/8-bit modes, and a dedicated CCM module managing wait/stop/doze low-power states via clock gating.

Its peripheral set includes FlexCAN v2.0 (2 channels), ESAI for full-duplex audio, CSI for CMOS image sensors, SIM interfaces compliant with ISO7816 for smart cards, and a 12-bit ADC with integrated resistive touchscreen controller-enabling simultaneous analog measurement and touch coordinate acquisition without external components.

Key Specifications

Pinout & Package

MCIMX257CVM4 uses a 400-ball MAPBGA package (Case 5284), 17 mm × 17 mm, 0.8 mm pitch, with ball map defined in Table 103 of IMX25CEC Rev. 10. Power delivery includes dedicated QVDD (core), NVDD_GPIO1/2 (I/O banks), NVDD_DDR2 (memory), and NVCC_DRYICE (security domain). Signal balls are grouped into functional banks: EMI (DDR2/NAND/NOR), USBPHY1/2, FEC, CSI, LCDC, and IOMUX-configurable GPIOs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCIMX257CVM4, MCIMX253CVM4 removes imaging and automotive interfaces while retaining identical core performance and industrial temperature range-making it ideal for cost-sensitive HMI-only use cases. The i.MX6ULL G0 offers higher CPU throughput and modern peripherals but sacrifices DryIce-level tamper detection and extended lifecycle availability for legacy industrial deployments.

Availability

MCIMX257CVM4 is available at Aetrix Electronics and suitable for industrial HMI panels, patient-monitoring devices, and residential smart gateways requiring stable component supply across multi-year production programs.

Supply support for MCIMX257CVM4 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 roots in Freescale's embedded processor heritage.

The i.MX25 product line was designed specifically for cost-sensitive, power-constrained industrial and consumer embedded applications requiring robust security, rich multimedia, and extended temperature operation-targeting HMI, medical, and smart infrastructure.

FAQ

What is the maximum DDR2 memory speed supported by MCIMX257CVM4?

The MCIMX257CVM4 supports DDR2 memory at up to 133 MHz, corresponding to a 266 MT/s data rate in double-data-rate mode. This is specified in the Electrical Characteristics section (Table 8) of the IMX25CEC datasheet and enables sufficient bandwidth for 800×480 color TFT framebuffers with alpha blending enabled in the LCDC.

Does MCIMX257CVM4 include an integrated USB PHY?

Yes, MCIMX257CVM4 integrates both a high-speed USB 2.0 OTG PHY and a full-speed USB host PHY on-die. These eliminate the need for external transceivers and are electrically characterized per USB 2.0 specification, with USBPHY1_DM/DP requiring 33 Ω series termination and USBPHY2_DM/DP supporting standard FS signaling.

What security features are implemented in MCIMX257CVM4?

MCIMX257CVM4 includes DryIce (hardware RTC with tamper-detect inputs MESH_C/D and TAMPER_A/B), IIM fusebox for one-time programmable keys and chip IDs, secure boot enforcement, and hardware-accelerated encryption primitives. These features are documented in Sections 2 and 3 of IMX25CEC and enable FIPS-compliant secure boot and DRM in medical and utility applications.

Is MCIMX257CVM4 pin-compatible with other i.MX25 variants?

Yes, MCIMX257CVM4 shares the same 400-ball MAPBGA-400 package (17×17 mm, 0.8 mm pitch) and ball map (Table 103) with MCIMX253CVM4 and MCIMX258CVM4. Pin functions are consistent across these variants; differences lie only in enabled peripherals (e.g., FlexCAN, ESAI), not in physical layout or electrical signaling.

What is the purpose of the BAT_VDD pin on MCIMX257CVM4?

The BAT_VDD pin supplies backup power to the DryIce security module, ensuring retention of RTC time and cryptographic keys during main power loss. It must be connected to a coin cell (1.15–1.55 V) in security-critical applications like smart meters; in non-security use, it may be tied to QVDD per IMX25CEC Section 3.1.2.