Prepress

Epson Develops USB Host Controller LSI with Dedicated USB Software for Connecting Mouse or Keyboard

Wednesday 27. August 2008 - Seiko Epson Corporation ("Epson") has developed the S1R72U01, Japan's first*1 USB controller LSI that includes dedicated software for connecting a mouse or keyboard.

Sample shipments of the S1R72U01 have already begun. Recently, the principles of universal design have been employed in various devices, highlighting a growing trend towards ease of use. As interface tools that are very inexpensive and easy-to-use, the mouse and keyboard are increasingly being used with embedded devices other than personal computers. However, before connection between a mouse or keyboard and an embedded device can actually be achieved, developers must deal with the following issues:
Acquisition of USB know-how
USB software development requires a lengthy time period and many man-hours
Inexpensive CPUs in the 8-bit and 16-bit class are not equipped with USB host functions
Epson’s newly-developed S1R72U01 incorporates all the USB software to enable connection with a mouse or keyboard in the chip, thus making it unnecessary for developers to have any knowledge at all about USB. Moreover, this product is able to connect with and control inexpensive CPUs in the 8-bit and 16-bit class and allows quick and easy connection with a mouse or keyboard and embedded devices.
*1 As of July 2008, based on studies carried out by Epson.
Main features

Easy to use Requires absolutely no knowledge of USB; control is possible with UART serial interface
Ideal for small systems Control is possible with 8-bit or 16-bit CPU; package is small; compatible with various clocks
Compatible with mouse and keyboard Equipped with human interface device class and USB host stack; development of USB software is completely unnecessary
Easy connection UART serial interface allows for easy connection with CPU
Compatible with single source Operates on single 3.0V to 5.5V power source
Small package QFN, 7mm square, 48pin; QFP, 9mm square, 48pin
Specifications

1) USB host functions
Equipped with 1 USB host port
Incorporates USB software
USB host stack; Human interface device class
Full-speed mode (12 Mbps) and low-speed mode (1.5 Mbps)
Incorporates host termination function
VBUS power supply (when using this function, 5V power supply is necessary)
2) Others
CPU interface UART serial interface
Power supply voltage Single 3.0V to 5.5V power supply
CPU interface = 1.8V to 5V
External clock 12MHz and 24MHz crystal oscillator and ceramic resonator (direct input of 12MHz and 24MHz is possible)
Package QFN package: 7mm square, 0.5mm pitch, 48pin
QFP package: 9mm square (including lead), 0.5mm pitch, 48pin
Operating temperature range -40°C to +85°C
Samples Now shipping ($6.00 US)
Release of an all-round model compatible with USB memory (master storage class) is scheduled for spring 2009.