83C51KB

Features:

Direct Drive LED Outputs
   -Four Pins (P3.7:4)
   -13 mA Typical Current Sink Capability
20 pF Cap On-chip for RC Resonator
   -Frequency Selectable (4-6 MHz)
8 Dedicated Key Scan Input (KSI) Pins
   -Schmitt-trigger Inputs
   -External Interrupt
   -Level Detect Interrupt Mode for Automatic Power-down Exit
16 Dedicated Key Scan Output (KSO) Pins with Quasi-bidirectional Port Drivers
   -No External Resistor Required
   -Located on P0.7:0 and P2.7:0
4-Kbyte On-chip ROM Memory
128-byte On-chip RAM Memory
Clock/Data Drivers to Motherboard
   -Strong Pullup Drivers for Keyboard  Cable Communication
   -8X42 Compatible Interface
   -Selectable external interrupt for Clock
ONCE mode (On-chip Emulation)
Power-on Reset Mode
   -Automatic Operation
5 Volt D.C. Operation
Reduces Manufacturing Cost by  Reducing Overall Component Count
Configurable Timer (16 bit or 2 by 8 Bit)
Uses Industry Standard Design Tools
Control Oriented Instruction Set
Industry Standard Architecture


Pinout




Specifications

Commercial.......................................................0 to +70
Storage Temperature................................. -65 to +150
Voltage on Any Pin to V_SS ...........................0.5 V to +6.5 V
I_OL  per I/O Pin..........................................................15 mA
Power Dissipation...................................................... 1.5 W

NOTICE: This document contains information on  products in the design phase of development. Do  not finalize a design with this information. Revised information will be published when the product is  available. Verify with your local Intel sales office  that you have the latest datasheet before finalizing a design.

+WARNING: Stressing the device beyond the "Absolute Maximum Ratings" may cause permanent damage. These are stress ratings only. Operation beyond the "Operating Condi-tions" is not recommended and extended exposure beyond the "Operating Conditions" may affect device reliability.



Description

The 83C51KB is a highly integrated keyboard microcontroller for the standard and advanced desktop keyboard industry. The integration of external components into the microcontroller reduces overall keyboard control system manufacturing cost in terms of the number of components used, the amount of PCB space required, reduced inventory, and a reduction in required assembly activities. In addition, the integration reduces the number and amount of software routines needed for signal debounce and input status poll operation. There is a resultant reduction in CPU overhead as well as on-chip memory requirements. The 83C51KB product line is manufactured with Intel state of the art complimentary high-performance metallic oxide semiconductor (CHMOS) design rules.