SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 98

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

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4.0
The SuperI/O (SIO) module is a member of National Semi-
conductor’s SuperI/O family of integrated PC peripherals. It
is a PC98 and ACPI compliant SIO that offers a single-cell
solution to the most commonly used ISA peripherals.
The SIO module incorporates: two Serial Ports, an Infrared
Communication Port that supports FIR, MIR, HP-SIR,
Sharp-IR, and Consumer Electronics-IR, a full IEEE 1284
Parallel Port, two ACCESS.bus Interface (ACB) ports, Sys-
tem Wakeup Control (SWC), and a Real-Time Clock (RTC)
that provides RTC timekeeping.
Serial Port 1
SuperI/O Module
Interface
Serial
Wakeup
Events
System Wakeup
Control
PWUREQ
Serial Port 2
Interface
Serial
AB1C
ACCESS.bus 1
Figure 4-1. SIO Block Diagram
AB1D
Port/Serial Port 3
IR Comunication
Infrared/Serial
Interface
98
Outstanding Features
• Full compatibility with ACPI Revision 1.0 requirements.
• System Wakeup Control powered by V
• Advanced RTC, Y2K compliant.
AB2C
ACCESS.bus 2
power-up request and a PME (power management
event) in response to SDATA_IN2 (an audio codec),
IRRX1 (a pre-programmed CEIR), or a RI2# (serial port
ring indicate) event.
AB2D
Real-Time Clock
V
BAT
V
SB
Parallel Port
Parallel Port
IEEE 1284
Interface
Host Interface
SB
Interface
, generates
ISA
Revision 3.0