LPC47N227
100 Pin Super I/O with LPC Interface for
Notebook Applications
FEATURES
3.3 Volt Operation (5V Tolerant)
PC99 and ACPI 1.0b Compliant
Programmable Wakeup Event Interface (nIO_PME
Pin)
SMI Support (nIO_SMI Pin)
GPIOs (29)
Two IRQ Input Pins
XNOR Chain
Intelligent Auto Power Management
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
-
Supports One Floppy Drive Directly
-
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
-
Swap Drives A and B
-
Non-Burst Mode DMA Option
-
48 Base I/O Address, 15 IRQ and 3 DMA
Options
-
Forceable Write Protect and Disk Change
Controls
Floppy Disk Available on Parallel Port Pins (ACPI
Compliant)
Enhanced Digital Data Separator
-
2 Mbps, 1 Mbps, 500 Kbps, 300 Kbps, 250
Kbps Data Rates
-
Programmable Precompensation Modes
Serial Ports
Two Full Function Serial Ports
High Speed NS16C550 Compatible UARTs
with Send/Receive 16-Byte FIFOs
-
Supports 230k and 460k Baud
-
Programmable Baud Rate Generator
-
Modem Control Circuitry
Infrared Communications Controller
-
IrDA v1.2 (4Mbps), HPSIR, ASKIR, Consumer
IR Support
-
2 IR Ports
-
96 Base I/O Address, 15 IRQ Options and 3
DMA Options
Multi-Mode Parallel Port with ChiProtect
-
Standard Mode IBM PC/XT, PC/AT, and PS/2
Compatible Bidirectional Parallel Port
-
Enhanced Parallel Port (EPP) Compatible -
EPP 1.7 and EPP 1.9 (IEEE 1284 Compliant)
-
IEEE 1284 Compliant Enhanced Capabilities
Port (ECP)
-
ChiProtect Circuitry for Protection Against
Damage Due to Printer Power-On
-
192 Base I/O Address, 15 IRQ and 3 DMA
Options
LPC Bus Host Interface
-
Multiplexed Command, Address and Data Bus
-
8-Bit I/O Transfers
-
8-Bit DMA Transfers
-
16-Bit Address Qualification
-
Serial IRQ Interface Compatible with
Serialized IRQ Support for PCI Systems
-
PCI nCLKRUN Support
-
Power Management Event (nIO_PME)
Interface Pin
100 Pin TQN, lead-free RoHS compliant package
and 100 Pin STQN, lead-free RoHS compliant
package
-
-
GENERAL DESCRIPTION
The SMSC LPC47N227 is a 3.3V PC 99 and ACPI 1.0b compliant Super I/O Controller. The LPC47N227
implements the LPC interface, a pin reduced ISA interface which provides the same or better performance as the
ISA/X-bus with a substantial savings in pins used. The part also includes 29 GPIO pins.
The LPC47N227 incorporates SMSC’s true CMOS 765B floppy disk controller, advanced digital data separator, 16-
byte data FIFO, two 16C550 compatible UARTs, one Multi-Mode parallel port with ChiProtect circuitry plus EPP and
ECP support and one floppy direct drive support. The LPC47N227 does not require any external filter components, is
easy to use and offers lower system cost and reduced board area. The LPC47N227 is software and register
compatible with SMSC’s proprietary 82077AA core.
The true CMOS 765B core provides 100% compatibility with IBM PC/XT and PC/AT architectures and provides data
overflow and underflow protection. The SMSC advanced digital data separator incorporates SMSC’s patented data
SMSC DB – LPC47N227
Page 1
Rev. 03-29-07
PRODUCT PREVIEW
SMSC [ SMSC CORPORATION ]
