INTRODUCTION
The ST7265x MCU supports volume data exchange with a host (computer or kiosk) via a full speed USB interface. The MCU is capable of handling various transfer protocols, with a particular emphasis on mass storage applications.

■ Memories
    – Up to 32K of ROM or High Density Flash (HDFlash) program memory with read/write protection
    – For HDFlash devices, In-Application Programming (IAP) via USB and In-Circuit programming (ICP)
    – Up to 5 Kbytes of RAM with up to 256 bytes stack
■ Clock, Reset and Supply Management
    – PLL for generating 48 MHz USB clock using a 12 MHz crystal
    – Low Voltage Reset (except on E suffix devices)
    – Dual supply management: analog voltage detector on the USB power line to enable smart power switching from USB power to battery (on E suffix devices).
    – Programmable Internal Voltage Regulator for Memory cards (2.8V to 3.5V) supplying: Flash Card I/O lines (voltage shifting) Up to 50 mA for Flash card supply
    – Clock-out capability
■ 47 programmable I/O lines
    – 15 high sink I/Os (8mA @0.6V / 20mA@1.3V)
    – 5 true open drain outputs
    – 24 lines programmable as interrupt inputs
■ USB (Universal Serial Bus) Interface
    – with DMA for full speed bulk applications compliant with USB 12 Mbs specification (version 2.0 compliant)
    – On-Chip 3.3V USB voltage regulator and transceivers with software power-down
    – 5 USB endpoints: 1 control endpoint 2 IN endpoints supporting interrupt and bulk 2 OUT endpoints supporting interrupt and bulk
    – Hardware conversion between USB bulk packets and 512-byte blocks
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