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47N350 Datasheet, PDF (1/346 Pages) SMSC Corporation – LEGACY FREE KEYBOARD EMBEDDED CONTROLLER WITH SPI AND LPC DOCKING INTERFACE | |||
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LPC47N350
Legacy-Free
Keyboard/Embedded
Controller with SPI and
LPC Docking Interface
Product Features
â 3.3V Operation with 5V Tolerant Buffers
â ACPI 2.0 PC2001 Compliant
â LPC Interface with Clock Run Support
â Decode I/O, Memory, and FWH cycles
â Serial IRQ Interface Compatible with Serialized
IRQ Support for PCI Systems
â 15 Direct IRQs
â ACPI SCI Interface
â nSMI output and supporting PM registers
â Shadowed write only registers
â LPC Switching
â Hot Plug LPC Docking Interface
â Secondary Switchable LPC interface (3.3V only)
â Internal 64K Flash ROM
â Programmed From Direct Parallel Interface,
8051, or LPC Host
â 2k-Byte Lockable Boot Block
â Can be Programed Without 8051 Intervention
â Three Power Planes
â Low Standby Current in Sleep Mode
â ACPI Embedded Controller Interface
â Configuration Register Set Compatible with ISA Plug-
and-Play Standard (Version 1.0a)
â High-Performance Embedded 8051 Keyboard and
System Controller
â Provides System Power Management
â System Watch Dog Timer (WDT)
â 8042 Style Host Interface
â Supports Interrupt and Polling Access
â 512 Bytes Executable RAM
â 512 Bytes Data RAM
â On-Chip Memory-Mapped Control Registers
â Access to RTC and CMOS Registers
â Up to 16x8 Keyboard Scan Matrix
â Two-16 Bit Timer/Counters
â Integrated Full-Duplex Serial Port Interface
â Eleven 8051 Interrupt Sources
â Thirty-Two 8-Bit, Host/8051 Mailbox Registers
â Thirty-Two Maskable Hardware Wake-Up Events
â Fast GATEA20
â Fast CPU_RESET
Datasheet
â Multiple Clock Sources and Operating
Frequencies
â IDLE and SLEEP Modes
â Fail-Safe Ring Oscillator
â Real-Time Clock
â MC146818 and DS1287 Compatible
â 256 Bytes of Battery Backed CMOS in Two 128-
Byte Banks
â 128 Bytes of CMOS RAM Lockable in 4x32-Byte
Blocks
â 12- and 24-Hour Time Format
â Binary and BCD Format
â <2µA Standby Current (typ)
â Two 8584-Style I2C/SMBus Controllers
â 8051 Controlled Logic Allows I2C/SMBus Master
or Slave Operation
â I2C/SMBus Controllers are Fully Operational on
Standby Power
â 2 Sets of Dedicated Pins per I2C/SMBus
Controller
â Serial Peripheral Interface (SPI)
â Four independent Hardware Driven PS/2 Ports
â 41 General Purpose I/O Pins
â 25 Maskable Hardware Wake-Event Capable
â 6 Programmable Open-Drain/Push-Pull Outputs
â Four Programmable Pulse-Width Modulator Outputs
â Independent Clock Rates
â 6-Bit Duty Cycle Granularity
â Operational in both Full on and Standby modes
â Dual Fan Tachometer Inputs
â Debug Port (UART)
â High-Speed 16550A-Compatible UART with 16-
Byte Send/Receive FIFOs
â Programmable Baud Rate Generator
â Relocatable to 480 Different Base I/O Addresses
â 15 IRQ Options
â XNOR-Chain Test Mode
â 128-Pin QFP and VTQFP Package
SMSC LPC47N350
DATASHEET
Revision 1.1 (01-14-03)
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