KB3920QFB0

[ENE Technology Inc.]

Features
Feature Summary
► Low Pin Count Host Interface (LPC)
■ SIRQ supporting IRQ1, IRQ12, SCI or SMI# interrupt
■ I/O Address Decoding:
● KBC IO Port 60h/64h
● Programmable EC IO Port 62h/66h
● Programmable 4-byte Index I/O ports to access internal registers
● One Programmable I/O write byte-address decoding (for example, it can be
used to decode Port_80h)
■ Support CLKRUN# as a slave device
► X-Bus Bus Interface (XBI)
■ Interfaces to ISA-Type memory and I/O devices
■ Addressable memory range up to 2MB
■ The 64K code memory of 8051 can be mapped onto 2 independent 16KB pages
■ 2 SELIO# for expended IO (XIO) by directly connecting to TTL (74373, 74244)
► 8051 Microprocessor
■ Industry 8051 Instruction set complaint with 3~5 cycles per instruction.
■ Programmable 4/8/16 MHz clock
■ Fast instruction fetching from XBI Interface
■ 128 bytes and 2KB tightly-coupled SRAM
■ Twenty-four extended interrupt sources
■ Two 16-bit tightly-coupled Timers
► 8042 Keyboard Controller
■ 8 Standard keyboard commands processed by hardware
■ Each hardware command can be optionally processed by firmware
► PS/2 Controller
■ External PS/2 device operation in firmware mode operation
(no hardware mode available)
■ Support three external PS/2 devices
■ Optimized hardware for firmware processing
► Internal Keyboard Encoder (IKB)
■ 18x8 keyboard scan matrix
■ Optimized hardware for firmware processing
■ Support W2K Internet / multimedia keys
■ Support hot-key events
■ Ghost key phenomenon cancellation (Continue ...)