EZ-USB FX3 — what this part does
The Infineon CYUSB2014-BZXC is a SuperSpeed USB Peripheral Controller from the EZ-USB FX3 series, built around an ARM9 core. It acts as a bridge between a host USB 3.0 port and a variety of peripheral interfaces — I²C, I²S, SPI, UART, and MMC/SD — so a design can stream video, audio, or bulk data through a single USB connection without an external host processor. A 512K x 8 internal RAM buffer stages the data path; the 59 general-purpose I/O lines let you connect parallel sensors, control lines, or memory-mapped peripherals. Program memory is external — the part executes firmware from a serial SPI Flash or parallel NOR — so the firmware image size is limited only by the external memory you attach. Packaged in a 121-ball TFBGA (10x10 mm body), it is a surface-mount device intended for controlled reflow assembly. The commercial temperature range (0°C to 70°C) fits indoor equipment, test gear, and consumer electronics — not extended-temperature or under-hood environments.
ARM9 core and external program memory — what it means for firmware
The ARM9 core runs the USB protocol stack and application logic. Because program memory is external, the firmware image size is decoupled from the chip — you can store a full USB class driver stack plus application code in a serial Flash. That also means the boot path and memory map must be configured at board design time; the EZ-USB FX3 reference design uses a SPI Flash for the firmware image, which the part loads at power-up.
Interface set and I/O — what connects without a bridge
The I²C bus can talk to codecs, sensors, or EEPROMs; I²S carries digital audio directly; MMC/SD connects to removable storage; SPI handles Flash or ADCs; UART talks to legacy serial devices. The 59 I/O lines are shared among these peripherals and general-purpose signalling — the pin-multiplexing scheme is detailed in the FX3 datasheet and must be reconciled with the external memory interface pins.
Supply rail and power sequencing
Core supply is 1.15 V to 1.25 V, a tight rail that requires a regulated supply.
Lifecycle and sourcing
The CYUSB2014-BZXC carries an Active product status and a current lifecycle stage, so there is no last-time-buy risk and no end-of-life pressure. It remains qualified for new designs and ongoing production.