General Description
The KBC1100 is an integrated Keyboard/System Management Controller which incorporates a high performance 8051 Micro-Controller, an LPC Bus Interface which provides a Firmware Hub Interface and integrated Super I/O/LPC Resources. The KBC1100 is powered by two separate supply planes (VCC1, VCC0) to provide “instant on” and sophisticated system power management functions. The KBC1100 power control circuitry supports multiple low power-down modes.

PRODUCT FEATURES
■ 3.3V Operation with 5V Tolerant Buffers
■ ACPI 1.0b/2.0 and PC99a/PC2001 Compliant
■ LPC Interface with Clock Run Support
   — Serial IRQ Interface Compatible with Serialized IRQ Support for PCI Systems
   — 15 Direct IRQs
   — Three 8-Bit DMA Channels
   — ACPI SCI Interface
   — nSMI
   — Shadowed write only registers
■ LPC/Firmware Hub Host Flash Interface
   — Single Byte FWH Memory Read and FWH Memory Write Support
   — FWH ID Support
   — 16MB FWH Flash and Register Addressing, 128K Legacy BIOS Addressing
   — Single Byte LPC Memory Read and LPC Memory Write Support
■ Serial Peripheral Interface (SPI)
   — 3-pin Full Duplex serial communication interface.
   — Dual Ported Controller with Keeper Circuit
■ 8 MByte Shared FlashROM Interface (SFI)
   — 8051/Host CPU Hardware Arbitrated Interface
   — 0.5 - 8MB - Host System BIOS & 8051 Keyboard
   — 8051 64KB Code Space Accessible as Separate 32KB Pages in Flash
   — Low-Power Flash Access Modes
   — 8051-Programmable Flash Access Protection
   – Read/Write/No-Access Protection
   – Variable Bank Sizes
■ Host Flash Address Redirection for Recovery
■ Serial Flash Programming Interface
■ Two Power Planes
   — Low Standby Current in Sleep Mode
   — Intelligent Auto Power Management for Super I/O
   — Main powered blocks power supplied by standby power plane and controlled by power management signals
■ 3-Port ACPI Embedded Controller Interface
■ Configuration Register Set
   — Compatible with ISA Plug-and-Play Standard (Version 1.0a)
   — Four Pin Selectable Addressing Options
   — 8051-Programmable Base Address
■ High-Performance Embedded 8051 Keyboard and System Controller
   — Provides System Power Management
   — System Watch Dog Timer (WDT)
   — 8042 Style Host Interface Relocatable to 480 Different Base I/O Addresses
   — Supports Interrupt and Polling Access
   — Interrupt Accelerator
   — 512 Bytes Data RAM
   — 2 Kilobytes Scratch ROM/RAM
   — On-Chip Memory-Mapped Control Registers
   — Up to 18x8 Keyboard Scan Matrix
   — Two 16 Bit Timer/Counters
   — Eleven 8051 Interrupt Sources
   — Thirty-Two 8-Bit, Host/8051 Mailbox Registers
   — Thirty-six Maskable Hardware Wake-Up Events
   — Fast GATEA20
   — Fast CPU_RESET
   — Multiple Clock Sources and Operating Frequencies up to 32MHz
   — IDLE and SLEEP Modes
   — Low Power Fail-Safe Ring Oscillator ±10% Accuracy
   — Hibernation Timer with programmable wake-up from 0.5ms to 128 minutes
   — 8051-Driven 16550A UART
   – 16-Byte Send/Receive FIFOs
   – External Baud Clock Option
   — Power-Fail Status Register
■ Advanced Infrared Communications Controller (IRCC 2.0)
   — IrDA V1.2 (4Mbps), HPSIR, ASKIR, Consumer IR Support
   — Two IR Ports
   — Relocatable Base I/O Address