3.3 Volt Operation (5V tolerant)
Floppy Disk Controller (Supports 2 FDCs)
Multi-Mode Parallel Port
Two UARTs
8042 Keyboard Controller
SMBus Controller
- SMBus access to LCD Interface
- SMBus Serial Port 2 Interface Disable
- SMBus access to Power On Elapsed Time
Counters
- Programmable Slave Address
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”
Programmable Wakeup Event Interface (IO_PME#
Pin)
SMI Support (IO_SMI# Pin)
GPIOs (55)
Fan Controller
- One Fan Speed Control Output
- One Fan Tachometer Input
ISA IRQ to Serial IRQ Conversion
XNOR Chain for Board Test Mode
PC2001 and ACPI 2.0 Compliant
128-pin QFP Package
ISA Plug-and-Play Compatible Register Set
Intelligent Auto Power Management
Power On Elapsed Time Counters
- Counter for Main Power
- Counter for Standby Power
Real Time Clock
- MC146818 and DS1287 Compatible
- 256 Bytes of Battery Backed CMOS in Two 128Byte 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
- <1µA Standby Current (typ)
SMSC LPC47S45x 1 Rev. 04-30-07
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
Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete
information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no
responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without
notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does
not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual property rights of SMSC
or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC's standard
Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors
known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request.
SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause
or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further
testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale
Agreement, may be obtained by visiting SMSC’s website at http://www.smsc.com. SMSC is a registered trademark of Standard Microsystems
Corporation (“SMSC”). Product names and company names are the trademarks of their respective holders.
SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE, AND ANY AND
ALL WARRANTIES ARISING FROM ANY COURSE OF DEALING OR USAGE OF TRADE. IN NO EVENT SHALL SMSC BE LIABLE FOR ANY
DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES; OR FOR LOST DATA, PROFITS, SAVINGS OR
REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT; TORT; NEGLIGENCE OF SMSC
OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHET HER OR NOT ANY REMEDY OF BUYER IS HELD TO
HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES.
SMSC LPC47S45x 2 Rev. 04-30-07
PRODUCT PREVIEW
GENERAL DESCRIPTION
The LPC47S45x is a 3.3V PC2001 compliant Super I/O controller designed for server applications. The LPC47S45x
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 provides 55 GPIO pins, ACPI support, an X-Bus
interface, two SMBus controllers, a fan speed control output, a fan tachometer input and four ISA IRQs that can be
routed to any of the serial IRQs. The LPC47S45x also provid es Po wer on Elapsed T ime counters for Mai n Power and
Standby Power, power supply on/off control, and a Real Time Clock.
The X-Bus interface allows the LPC47S45x to interface to as many as four external components that have an eigh t
bit data bus and occupy up to 4 contiguous I/O address ports. It is accessible by either the SMBus or the LPC
interface. It is capable of interfacing to an LCD Panel Int erface Controller without any external logic and it can be
used for Port 80h “snooping”.
The LPC47S45x offers two SMBus controllers that share the same pin interface. The SMBus slave only device
provides external access to an LCD controller that can be attached to the X-Bus. It is capable of disabling the floppy
port, the serial ports, and the parallel port. The SMBus slave only device can also tristate the Serial Port 2 interfac e
so that it may be muxed with an external UART controller. The LPC47S45x is equipped with t wo counters that may
be monitored either by the SMBus slave onl y device or by the LPC interface, which monitor the length of time VCC
and VTR are active.
The LPC47S45x incorporates a keyboard interface, SMSC' s true CMOS 765B flo ppy disk controller, advanced di gital
data separator, two 16C550 compatible UART s, one Multi-Mode par allel port which includes ChiProtect circuitr y plus
EPP and ECP, and Intelligent Power Management. The true CMOS 765B core provides 100% compatibilit y with IBM
PC/XT and PC/AT architectures in addition to providing data overflow and underflow protection. The SMSC
advanced digital data separator incorporates SMSC's patented data separator technology, allowing for ease of
testing and use. The on-chip UARTs are compatible with the NS16C550. The parallel port is compatible with IBM
PC/AT architecture, as well as IEEE 1284 EPP and ECP. The LPC47S45x incorporates sophisticated power control
circuitry (PCC). The PCC supports multiple low power down modes.
The LPC47S45x supports the ISA Plug-and-Play Standard (Version 1.0a) and provides the recommended
functionality to support Windows 2000, Windows Me, and PC2001. The I/O Address, DMA Channel and Hardware
IRQ of each logical device in the LPC47S45x may be reprogrammed through the internal configuration registers.
There are 480 I/O address location options, a Serialized IRQ interface, and three DMA channels.