User Guide

Hardware Functional Overview
4-10 FIC A985 Service Manual
4.5.2 SiS 961 MuTIOL Media I/O Features
The SiS961 MuTIOL Media I/O integrates the Audio Controller with AC 97 Interface, the
Ethernet MAC, the Dual Universal Serial Bus Host Controllers, the IDE Master/Slave
controllers, and the MuTIOL Connect to PCI bridge. The PCI to LPC bridge, I/O Advanced
Programmable Interrupt Controller, legacy system I/O, I/O Advanced Programmable Interrupt
Controller and legacy power management functionalities are also integrated. The SiS961 also
incorporates an universal interface supporting the asynchronous inputs/outputs of the X86
compatible microprocessors like PIII, K7, and P4.
The Integrated Audio Controller features a 6 channels of AC 97 v2.2 compliance audio to
present 5.1-channel Dolby digital material or to generate stereo audio with simultaneous V.90
HSP modem operation. Besides, 4 separate SDATAIN pins are provided to support multiple
audio Codecs + one modem Codec maxi mally, effectuating the realization of 5.1 channel
Dolby digital material in theater quality sound. Both traditional consumer digital audio
channel as well as the AC 97 v2.2 compliant consumer digital audio slot are supported. VRA
mode is also associated with both the AC 97 audio link and the traditional consumer digital
audio channel.
The integrated Fast Ethernet MAC features an IEEE 802.3 and IEEE 802.3x compliant MAC
supporting full duplex 10 Base-T, 100 Base-T Ethernet, or 1Mb/s & 10Mb/s Home
networking. 5 wake-up Frames, Magic Packet and link status change wake-up functions in
G1/G2 states are supported. Besides, the integrated MAC provides a scheme to store the
MAC address without the need of an external EEPROM. The 25 MHz oscillating circuit is
integrated so as only an external low cost 25 MHz crystal is needed for the clocking system.
The integrated Universal Serial Bus Host Controllers features Dual Independent OHCI
Compliant Host controllers with six USB ports delivering 2 x 12 Mb/s bandwidth and rich
connectivity. Besides, each port can be optionally configured as the wake-up source. Legacy
USB devices as well as over current detection are also implemented.
The integrated IDE Master/Slave controllers features Dual Independent IDE channels
supporting PIO mode 0,1,2,3,4, and Ultra DMA 33/66/100. It provides two separate data
paths for the dual IDE channels that sustain the high data transfer rate in the multitasking
environment. The MuTIOL Connect to PCI bridge supporting 6 PCI master is compliant to
PCI 2.2 specification. The SiS961 also incorporates the legacy system I/O like: two 8237A
compatible DMA controllers, three 8254 compatible programmable 16-bit counters,
hardwired keyboard controller and PS2 mouse interface, Real Time clock with 256B CMOS
SRAM and two 8259A compatible Interrupt controllers. Besides, the I/O APIC managing up
to 24 interrupts with both Serial and FSB interrupt delivery modes is supported.
The integrated power management module incorporates the ACPI 1.0b compliance functions,
the APM 1.2 compliance functions, and the PCI bus power management interface spec. v1.1.
Numerous power-up events and power down events are also supported. 21 general purposed
I/O pins are provided to give an easy to use logic for specific application. In addition, the
SiS961 supports Intel Speed Step technology and Deeper Sleep power state for Intel Mobile
processor.
The SiS 961 MuTIOL Media I/O functions and capabilities include:
High performance MuTIOL Connect Interconnecting SiS’s Series NBs
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