SIO10N268-NU Standard Microsystems (SMSC), SIO10N268-NU Datasheet - Page 3

• Manufacturer Part Number: SIO10N268-NU
• Manufacturer: Standard Microsystems (SMSC)

Specifications of SIO10N268-NU

• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

Advanced Notebook I/O for ISA or LPC Designs with X-Bus Interface for I/O, Memory, and
FWH Emulation and Four Serial Ports
General Description
SMSC SIO10N268
The SIO10N268 is a single chip I/O device that can be used on the ISA or LPC bus. Bus selection is
accomplished as a jumper option. Offering the same part with two system busses enables easy
migration from an ISA architecture to the LPC generation enabling the preservation of design
techniques and BIOS.
The SIO10N268 is a 3.3V operational (5.0V tolerant), PC 99/2001, and ACPI 1.0 compliant Super I/O
Controller. This device includes SMSC’s true CMOS 765B floppy disk controller with advanced digital
data separator and SMSC’s Multi-Mode parallel port with ChiProtect circuitry plus EPP and ECP
support.
Each variation of the part also includes 33 GPIO pins, support for two LED’s with blinking option, and
a WatchDog Timer (WDT) with optional output pin. The SIO10N268 includes (4) 16C550 compatible
UARTs. One UART includes additional support for a Serial Infrared Interface that complies with IrDA
v1.2 (Fast IR), HPSIR, and ASKIR formats, as well as Consumer IR.
SIO10N268, when LPC Mode is selected, implements the LPC bus interface. In this mode, the X-Bus
Interface is enabled to interface to external I/O devices that have an 8-bit data bus and to standard
ISA memory devices, up to 2MB, which can serve as BIOS flash.
SIO10N268, when ISA Mode is selected, supports the ISA Plug-and-Play Standard (Version 1.0a). The
I/O Address, DMA Channel and Hardware IRQ of each device in the part may be reprogrammed
through the internal configuration registers.
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Revision 0.5 (06-12-08)