LPC47S422-MS Standard Microsystems (SMSC), LPC47S422-MS Datasheet - Page 3

• Manufacturer Part Number: LPC47S422-MS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LPC47S422-MS

• Pin Count: 100
• Lead Free Status / RoHS Status: Compliant

Enhanced Super I/O with LPC Interface for Server Applications
General Description
Block Diagram
SMSC LPC47S422
Host Interface
The LPC47S422 is a 3.3V PC99 compliant Super I/O controller. The LPC47S422 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 39 GPIO pins, an SMBus controller, a
fan speed control output, a fan tachometer input, four ISA IRQs that can be routed to any of the serial
IRQs, and an X-Bus interface.
The LPC47S422 incorporates a keyboard interface, SMSC's true CMOS 765B floppy disk controller,
advanced digital data separator, two 16C550 compatible UARTs, one Multi-Mode parallel port which
includes ChiProtect circuitry plus EPP and ECP, and Intelligent Power Management. The true CMOS
765B core provides 100% compatibility 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 LPC47S422 incorporates sophisticated power
control circuitry (PCC). The PCC supports multiple low power down modes.
The LPC47S422 supports the ISA Plug-and-Play Standard (Version 1.0a) and provides the
recommended functionality to support Windows '95/'98 and PC99. The I/O Address, DMA Channel and
Hardware IRQ of each logical device in the LPC47S422 may be reprogrammed through the internal
configuration registers. There are 480 I/O address location options, a Serialized IRQ interface, and
three DMA channels.
ACE UART
Registers
Figure 1 LPC47S422 Block Diagram
ACE
PRODUCT PREVIEW
3
Sharp ASK
IrDA SIR
COM
IR Options Register,
Bit 6
Output
MUX
IR
COM
Rev. 05-07-07