KBD42W11

Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device.

The KBD42W11 keyboard controller is programmed to support the IBM® compatible personal computer keyboard serial interface. The keyboard controller receives serial data from the keyboard, checks the parity of the data, translates the scan code, and presents the data to the system as a byte of data in its output buffer. The controller will interrupt the system when data is placed in its output buffer. The byte of data will be sent to the keyboard serially with an odd parity bit automatically inserted. The keyboard is required to acknowledge all data transmissions. No transmission should be sent to the keyboard until acknowledgment is received for the previous byte sent.

The KBD42W11 keyboard controller and BIOS to improve the performance of IBM PC machines and their compatibles. A hardwire methodology is used in this keyboard controller instead of a software implementation, as in the traditional 8042 keyboard BIOS. This enables the keyboard controller to respond instantly to all commands sent from the keyboard to the CPU BIOS.

The KBD42W11 enables popular programs such as AutoCAD^®, Microsoft^® Windows™, NOVELL^®, and other programs to run much faster.

IBM is a registered trademark of International Business Machines Corporation. AutoCAD is a registered trademark of Autodesk, Inc. Microsoft is a registered trademark and Windows is a trademark of Microsoft Corporation. NOVELL is a registered trademark of Novell, Inc.

Standard Microsystems is a registered trademark and SMSC is a trademark of Standard Microsystems Corporation. Other product and company names are trademarks or registered trademarks of their respective holders.