2. Features
2. 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) serial interface permits the easy connection of various CPU types.
Built-in regulator
USB regulator
Core voltage regulator
The S1R72U01 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
S1R72U01 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 S1R72U01 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 S1R72U01
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 S1R72U01 uses a serial interface (asynchronous type) to display the history of internal LSI
processing, etc. This function provides useful information during product (system) development.
2
Seiko Epson Corporation
S1R72U01 Data Sheet
(Rev. 1.20)
EPSON [ EPSON COMPANY ]
