Overview
The S1R72U06 is a serial (UART/SPI) - USB 2.0 host/device bridge LSI supporting USB 2.0 FS/LS. The main CPU controls the LSI’s USB functions using simplified commands. No USB driver is required. The USB classes supported are Mass Storage class (for USB host operation) and Human Interface Device class (for USB host/device operation).

FEATUREs
■ Ease of use and easy connections (serial connections)
  Uses simplified commands to control USB functions
   The main CPU controls this LSI’s USB functions using simplified commands. No USB driver needs to be installed.
   The UART (2-wire asynchronous) or SPI (clock synchronous) serial interface permits the easy connection of various CPU types.
■ Built-in regulator
  USB regulator
  Core voltage regulator
   The S1R72U06 has two regulators: one (input range: 3.3 to 5.0 V) to generate 3.3 V for the USB and another (input voltage: 3.3 to 5.0 V) to generate the internal core voltage of 1.8 V. This allows the S1R72U06 to operate from a single power source as long as the supplied voltage is at least 3.3 V.
■ Built-in VBUS supply function
  No external VBUS power SW required
   The S1R72U06 features a built-in VBUS supply function for USB host operations, eliminating the need for the external VBUS power SW previously required by the USB host controller. The S1R72U06 features an interface that controls the external VBUS power SW if the built-in VBUS supply function cannot supply adequate current. If necessary, connect an external VBUS power SW to ensure sufficient current capacity for bus-powered devices.
■ Product (system) development support function
  History display
   The S1R72U06 uses a serial interface (asynchronous type) to display the history of internal LSI processing, etc. This function provides useful information during product (system) development.