KB3910 View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

KB3910

Keyboard Controller

Unspecified 

1. Features

KB3920 Keyboard Controller Datasheet

1.1 Feature Summary

Ø Low Pin Count Host Interface (LPC)

n SIRQ supporting IRQ1, IRQ12, SCI or SMI# interrupt

n I/O Address Decoding:

l KBC IO Port 60h/64h

l Programmable EC IO Port 62h/66h

l Programmable 4-byte Index I/O ports to access internal registers

l One Programmable I/O write byte-address decoding (for example, it can be

used to decode Port_80h)

n Support CLKRUN# as a slave device

Ø X-Bus Bus Interface (XBI)

n Interfaces to ISA-Type memory and I/O devices

n Addressable memory range up to 2MB

n The 64K code memory of 8051 can be mapped onto 2 independent 16KB pages

n 2 SELIO# for expended IO (XIO) by directly connecting to TTL (74373, 74244)

Ø 8051 Microprocessor

n Industry 8051 Instruction set complaint with 3~5 cycles per instruction.

n Programmable 4/8/16 MHz clock

n Fast instruction fetching from XBI Interface

n 128 bytes and 2KB tightly-coupled SRAM

n Twenty-four extended interrupt sources

n Two 16-bit tightly-coupled Timers

Ø 8042 Keyboard Controller

n 8 Standard keyboard commands processed by hardware

n Each hardware command can be optionally processed by firmware

Ø PS/2 Controller

n External PS/2 device operation in firmware mode operation (no hardware mode

available)

n Support three external PS/2 devices

n Optimized hardware for firmware processing

Copyright©2006, ENE Technology Inc.

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