GENERAL DESCRIPTION
The KBD43W13 is a keyboard controller designed to provide the functions needed to interface a CPU to a keyboard or to a PS/2 mouse. The KBD43W13 can be used with IBM®-compatible personal computers or PS/2-based systems. The controller receives serial data from the keyboard or PS/2 mouse, checks the parity of the data, 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 keyboard and PS/2 mouse are required to acknowledge all data transmissions. No transmission should be sent to the keyboard or PS/2 mouse until acknowledgment is received for the previous byte sent.

FEATURES
• Supports IBM PC and Compatible System Designs
• Full Hardwire Design Based on Advanced VLSI CMOS Technology
• Supports PS/2 Mouse
• 6 MHz to 12 MHz Operating Frequency
• Supports AT Mode and PS/2 Mode for Different Hardware Configurations
• Automatically Detects PS/2 Mode or AT Mode
• Much Faster Than Traditional Keyboard Controllers
• 40 Pin DIP or 44 Pin PLCC Package