Infineon Technologies CYUSB2024-BZXI

Overview

CYUSB2024-BZXI from Infineon Technologies is a USB 2.0 High-Speed mass-storage peripheral controller integrating dual SD/MMC/SDIO host ports (S0 and S1), USB 2.0 peripheral interface with 32 physical endpoints, I²C master up to 1 MHz, and ARM926EJ-S core. It supports UHS-I SDR50/DDR50, eMMC 4.4, and SDIO 3.0 in embedded storage bridges for USB thumb drives, card readers, and laptop/TV SD slots.

For engineers reviewing the CYUSB2024-BZXI datasheet, CYUSB2024-BZXI pinout, CYUSB2024-BZXI application, or CYUSB2024-BZXI equivalent, this device serves as a programmable bridge IC enabling simultaneous USB-to-SD/eMMC/SDIO translation with configurable boot sources (I²C, SPI, eMMC, USB), ultra-low-power core sleep (<60 µA), and independent power domains for I/O and core logic.

Technical Context

The CYUSB2024-BZXI implements a dual-port mass-storage architecture where S0 and S1 support independent or interleaved SD/SDIO/MMC protocols per SD 3.0 and MMC 4.41 specs. Its USB 2.0 peripheral interface supports both MSC and UAS classes with Streams capability for optimized data throughput.

It features a dedicated ARM926EJ-S processor with 512 kB SRAM, clocked via internal PLL from selectable inputs (19.2 MHz crystal or 19.2/26/38.4/52 MHz external clock), and includes UART, SPI (33 MHz max), and I²S (up to 192 kHz sampling) interfaces-all with separate voltage domains and configurable I/O drive strengths.

Key Specifications

Pinout & Package

Package: 10 mm × 10 mm, 0.8 mm pitch, 121-ball BGA (ball map per Infineon datasheet Rev.*E, page 37). Thermal pad exposed on underside for PCB-level heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CYUSB2024-BZXI, CYUSB2022-BZXI reduces functionality to a single port but retains full UAS and ARM9 programmability, while GL827L-16 offers lower cost and power at the expense of flexibility, speed, and interface extensibility.

Availability

CYUSB2024-BZXI is available at Aetrix Electronics and suitable for USB storage bridges, multi-format card readers, laptop SD slot adapters, and embedded SDIO peripheral dongles requiring stable component supply, long-term lifecycle support, and qualified industrial-grade sourcing.

Supply support for CYUSB2024-BZXI 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive MCUs, security ICs, and connectivity solutions, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.

CYUSB2024-BZXI belongs to Infineon's CYUSB SD2 family-designed specifically for high-performance, firmware-programmable USB-to-mass-storage bridge applications requiring dual SDIO/SD/MMC ports and UAS acceleration.

FAQ

What boot sources does CYUSB2024-BZXI support, and how are they selected?

CYUSB2024-BZXI supports booting from USB host download, I²C-connected EEPROM, SPI flash (Infineon S25FS064S/S25FS128S/S25LFL064L or Winbond W25Q32FW), or eMMC on S0-Port. Selection is controlled by strapping PMODE[2:0] pins at reset-floating (F) and logic levels define priority order and fallback behavior per Table 2 in the datasheet.

Does CYUSB2024-BZXI support SD Express or PCIe-based SD cards?

No. CYUSB2024-BZXI implements SD 3.0 and eMMC 4.4 specifications only, supporting UHS-I SDR50/DDR50 modes (max 100 MB/s) but not SD Express (PCIe/NVMe tunneling) or SD 4.0+ features. Its PHY and controller logic are physically and architecturally limited to legacy SDIO/SD/MMC signaling.

Can the ARM926EJ-S core be used for custom real-time processing beyond storage bridging?

Yes. The embedded ARM926EJ-S core with 512 kB SRAM runs customer firmware loaded at boot. It supports UART, SPI, I²S, and GPIO peripherals-enabling custom tasks like audio preprocessing (via I²S), secure key injection (via I²C), or sensor fusion-provided timing-critical USB/SD transactions are managed via hardware accelerators.

What are the voltage domain requirements for I²C and USB interfaces?

I²C operates on VIO5 (1.2 V, 1.8 V, 2.5 V, or 3.3 V), with maximum speed dependent on voltage (100 kHz at 1.2 V; 1 MHz at ≥1.8 V). USB D+/D− use 3.3 V I/O domain (VIO3), with integrated ESD protection and transceiver compliant to USB 2.0 electrical specs-no level-shifting needed for standard USB hosts.