SMSC LPC47S45x User Manual

SMSC LPC47S45x 

 1 

Rev. 04-30-07 

 

 

 

 

 
 
 

 

 

 

ƒ  3.3 Volt Operation (5V tolerant) 
ƒ  Floppy Disk Controller (Supports 2 FDCs) 
ƒ  Multi-Mode Parallel Port 
ƒ Two UARTs 
ƒ  8042 Keyboard Controller 
ƒ SMBus Controller 

-  SMBus access to LCD Interface 
-  SMBus Serial Port 2 Interface Disable 
-  SMBus access to Power On Elapsed Time 

Counters 

-  Programmable Slave Address 

ƒ X-Bus Interface 

-  Supports up to four external I/O components 
-  Offers two modes of operation 
-  Support for Driving LCD Panel Interface 

Controller 

-  Supports Port 80h “Snooping” 

ƒ  Programmable Wakeup Event Interface (IO_PME# 

Pin) 

ƒ  SMI Support (IO_SMI# Pin) 
ƒ GPIOs (55) 
ƒ Fan Controller 

-  One Fan Speed Control Output 
-  One Fan Tachometer Input 

ƒ  ISA IRQ to Serial IRQ Conversion 
ƒ  XNOR Chain for Board Test Mode 
ƒ  PC2001 and ACPI 2.0 Compliant 
ƒ  128-pin QFP Package 
ƒ  ISA Plug-and-Play Compatible Register Set 
ƒ  Intelligent Auto Power Management 
ƒ  Power On Elapsed Time Counters 

-  Counter for Main Power 
-  Counter for Standby Power 

ƒ  Real Time Clock 

-  MC146818 and DS1287 Compatible 
-  256 Bytes of Battery Backed CMOS in Two 128-

Byte Banks 

-  128 Bytes of CMOS RAM Lockable in 4x32 Byte 

Blocks 

-  12 and 24 Hour Time Format 
-  24-hour daily alarm 
- 30-day alarm 
-  Binary and BCD Format 
- <1

µA Standby Current (typ) 

ƒ  2.88MB Super I/O Floppy Disk Controller 

-  Licensed CMOS 765B Floppy Disk Controller 
-  Software and Register Compatible with SMSC's 

Proprietary 82077AA Compatible Core 

-  Configurable Open Drain/Push-Pull Output 

Drivers 

-  Supports Vertical Recording Format 
-  16-Byte Data FIFO 
-  100% IBM Compatibility 
-  Detects All Overrun and Underrun Conditions 
-  Sophisticated Power Control Circuitry (PCC) 

Including Multiple Powerdown Modes for 
Reduced Power Consumption 

-  DMA Enable Logic 
-  Data Rate and Drive Control Registers 
-  480 Address, up to 15 IRQ and Four DMA 

Options 

ƒ  Enhanced Digital Data Separator 

-  2 Mbps, 1 Mbps,  500 Kbps, 300 Kbps, 250 Kbps 

Data Rates 

-  Programmable Precompensation Modes 

ƒ Keyboard Controller 

- 8042 Software Compatible 
- 8-Bit Microcomputer 
-  2k Bytes of Program ROM 
-  256 Bytes of Data RAM 
-  Four Open Drain Outputs Dedicated for 

Keyboard/Mouse Interface 

-  Asynchronous Access to Two Data Registers and 

One Status Register 

-  Supports Interrupt and Polling Access 
-  8-Bit Counter Timer 
-  Port 92 Support 
-  Fast Gate A20 and KRESET Outputs 

ƒ Serial Ports 

-  Two Full Function Serial Ports 
-  High Speed NS16C550A Compatible UARTs with 

Send/Receive 16-Byte FIFOs 

-  Supports 230k and 460k Baud 
-  Programmable Baud Rate Generator 
-  Modem Control Circuitry 
-  480 Address and 15 IRQ Options 
-  IrDA 1.0, HP-SIR, ASK IR Support