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AMD Geode™ SC1200/SC1201 Processor Data Book 89
5
SuperI/O Module 32579B
5.0SuperI/O Module
The SuperI/O (SIO) module 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.
Outstanding Features
• Full compatibility with ACPI Revision 1.0 requirements.
• System Wakeup Control powered by V
SB
, generates
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.
• Advanced RTC, Y2K compliant.
Figure 5-1. SIO Block Diagram
Wakeup
Events
Host Interface
ISA
Interface
AB2DPWUREQ
IR Comunication
Infrared /Serial
Interface
Serial Port 2
Serial
Interface
V
SB
V
BAT
Port/Serial Port 3
Serial
Interface
System Wakeup
Control
Real-Time Clock
AB2C
ACCESS.bus 2
AB1DAB1C
ACCESS.bus 1
IEEE 1284
Parallel Port
Parallel Port
Interface
Serial Port 1