Alcor Micro AU9412EEP, Техническое справочное руководство

Страница: 5 / 29

INTRODUCTION 1
1.0 Introduction
1.1. Description
The AU9412EEP is an integrated USB keyboard and 2 port hub controller chip. The
AU9412EEP has a built-in default keyboard matrix, so that it can be directly connected to an
18 x 8 keyboard matrix. The keyboard matrix can be customized via an optional external
512-byte serial EEPROM. Downstream ports can be used to connect various USB peripheral
devices, such as USB
printers, modems, scanners, cameras, mice, and joysticks, to the system
without adding external glue logic.
Single chip integration makes the AU9412EEP the most cost effective keyboard/hub solution
available in the market.
1.2. Features
•
Fully compliant with the Universal Serial Bus Specification, version 1.0
•
USB hub design is compliant with Universal Serial Bus Hub Specification, revision 1.1
•
USB keyboard design is compliant with USB Device Class Definition for Human
Interface Devices (HID), Firmware Specification, version 1.0
•
Single chip integrated USB keyboard/hub controller with embedded proprietary
processor
•
Integrated USB hub supports two bus-powered downstream ports
•
Patent-pending, table-driven SCANTABLE

technology for easy customization to
different keyboard matrix
•
USB vendor ID, product ID, and keyboard scan code table can be customized via external
EEPROM
•
Built-in, cost saving, default scan code table and vendor ID, if customization is not
necessary
•
Built-in 3.3v voltage regulator allows 5V operating voltage drawing directly from
USB bus. This results in reduced overall system cost.
•
Optional gang-powered control pin for downstream port.
•
Runs at 12Mhz frequency
•
Available in 48-pin DIP