Infineon Technologies CYWB0224ABMX-FDXIT

Overview

CYWB0224ABMX-FDXIT from Cypress Semiconductor is a West Bridge™ Astoria™ USB and mass storage peripheral controller IC designed to bridge host processors with NAND Flash, SD/SDIO/MMC+/CE-ATA devices, and high-speed USB 2.0 interfaces. It integrates an 8051 microcontroller for firmware-managed storage protocols, supports 4-bit ECC for MLC NAND, up to 16 NAND chip enables, and SLIM™ architecture enabling simultaneous independent data paths between processor–USB and USB–storage. Used in portable media players and cellular phones for concurrent host access and local device operation.

For engineers reviewing the CYWB0224ABMX-FDXIT datasheet, CYWB0224ABMX-FDXIT pinout, CYWB0224ABMX-FDXIT application, or CYWB0224ABMX-FDXIT equivalent, key selection criteria include SLC/MLC NAND interface support, SLIM™-enabled concurrent USB + storage access, 16 programmable USB endpoints, 1.8V core voltage, and VFBGA-100 package compatibility with 6×6 mm footprint.

Technical Context

The CYWB0224ABMX-FDXIT implements Cypress's SLIM™ architecture, enabling three independent ports-P-port (processor), S-port (storage), and U-port (USB)-to operate concurrently without interference. Its embedded 8051 executes firmware for NAND bad-block management, static wear leveling, and SD/SDIO/MMC+/CE-ATA command handling, while remaining outside the data path to preserve throughput.

It supports flexible processor interfacing including SRAM, pseudo-CRAM (Antioch), pseudo-NAND, and SPI slave modes, with asynchronous bandwidth up to 66.7 MBps. The USB 2.0 transceiver delivers 480 Mbps high-speed operation with integrated switch support and 16 configurable endpoints (CONTROL/BULK/INTERRUPT/ISOCHRONOUS).

Key Specifications

Pinout & Package

Package: 100-ball Very Thin Fine-Pitch Ball Grid Array (VFBGA), 6 mm × 6 mm, 0.5 mm pitch, Pb-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB-to-storage bridge applications.

Compared with CYWB0224ABS-BVXI, CYWB0224ABMX-FDXIT adds MLC NAND support without changing footprint or interface behavior; versus CYWB0226ABM-BVXI, it omits the USB switch-reducing component count where fixed USB connectivity suffices.

Availability

CYWB0224ABMX-FDXIT is available at Aetrix Electronics and suitable for cellular phones, portable media players, digital cameras, and POS terminals requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.

Supply support for CYWB0224ABMX-FDXIT 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

Cypress Semiconductor (now part of Infineon Technologies) designs high-performance mixed-signal ICs for embedded connectivity, memory interface, and programmable systems.

This device belongs to the West Bridge™ family, engineered specifically to offload USB and heterogeneous storage protocol complexity from application processors in resource-constrained portable electronics.

FAQ

What NAND Flash types and densities does CYWB0224ABMX-FDXIT support?

CYWB0224ABMX-FDXIT supports both SLC and MLC NAND Flash devices with x8 or x16 bus widths, up to 16 devices via 8 physical CE# pins (expanded to 16 through firmware). It handles standard ONFI and legacy NAND timing, with 4-bit ECC for MLC and single-bit ECC for SLC. Density support depends on NAND vendor specifications but aligns with common 1–16 GB MLC and 512 MB–4 GB SLC parts used in portable media.

Does CYWB0224ABMX-FDXIT require external firmware loading?

No. The embedded 8051 microcontroller executes factory-programmed firmware that handles all NAND, SD/SDIO/MMC+/CE-ATA protocol stacks and USB class drivers. Host initialization only requires configuration register writes via the P-port-no external code download or boot loader is needed. Firmware is immutable and validated for USB Mass Storage Class (MSC) and standard storage command sets.

Can CYWB0224ABMX-FDXIT operate in USB device-only mode without host processor involvement?

No. It functions exclusively as a peripheral bridge IC and requires an external host processor connected via the P-port to configure registers, manage buffers, and initiate transactions. The 8051 handles low-level protocol execution but does not replace the host CPU-it accelerates and isolates storage/USB I/O to reduce host software overhead and improve real-time determinism.

How does the SLIM™ architecture prevent USB and storage interference during concurrent operation?

SLIM™ uses physically separate, hardware-managed data paths: one between P-port and U-port (processor ↔ USB), another between U-port and S-port (USB ↔ storage). These paths share no buffers or arbitration logic-each operates independently with dedicated DMA engines and endpoint FIFOs. This eliminates bus contention, ensuring guaranteed bandwidth for both USB transfers and NAND/SDIO reads/writes even under peak load.