key features

Host Interface Controller

Supports Intel Slot 1/Socket370 Pentium!!!/Celeron CPUs

Asynchronous Host/DRAM Clock Scheme at the combination of 133/133, 100/133

Integrated DRAM Controller

3 unbuffered DIMM of 3.3V SDRAM

Supports SDRAM Memory Bus up to 133 MHz

System Memory Size up to 1.5GB

Up to 512MB per DIMM

Supports 16Mb, 64Mb, 128Mb, 256Mb, 512Mb SDRAM Technology

Integrated A.G.P. Compliant Target/66Mhz Host-to-PCI Bridge

AGP v2.0 Compliant

Supports Graphic Window Size from 4MBytes to 256MBytes

Supports Pipelined Process in CPU-to- A.G.P. Access

Supports Additional AGP slot with 4X and Fast Write Transaction

Meet PC2001 Requirements

Build-in Multi-threaded IO Link Delivering 1.2GB/sec

Concurrently Serve (Embedded) DMA Devices including Dual IDE channels, Dual USB channels,and S/W Audio/Modem DMA channels

Support those Embedded DMA Devices with Pipelined Streaming

PCI 2.2 Specification Compliant

High Performance PCI Arbiter

Supports up to 6 PCI Masters

Fast IDE Master/Slave Controller

Supports Build-in Multithreaded IO Link Mastering

PIO Mode 0, 1, 2 , 3, 4

Multiword DMA Mode 0, 1, 2

Ultra DMA 33/66/100

Two Independent IDE Channels Each with 16 DW FIFO

Advanced Power Management

Meets ACPI 1.0b Requirements

Meets APM 1.2 Requirements

ACPI Sleep States Include S1, S3, S4, S5

System Power-Up Events Include: Power Button, Keyboard Password/ Hot-Key, RTC Alarm, Modem Ring-In, GPIO0, PME#, AC'97 Wake-Up and USB Wake-Up

Integrated Keyboard Controller

Integrated Real Time Clock (RTC) with 256B CMOS SRAM

Universal Serial Bus Host Controller

OpenHCI Host Controller with Root Hub

Two USB Host Controllers

Six USB Ports

Integrated Audio Controller with AC97 Interface

Supports AC97 v2.1 Audio Codec and Modem Codec

NAND Tree for Ball Connectivity Testing

677-Balls BGA Package

1.8V Core with Mixed 1.5V, 2.5V and 3.3V I/O CMOS Technology

SiS633 overview

The single chipset, SiS633, provides a high performance/low cost Desktop solution for the Intel Slot 1 and socket 370 series CPUs, Celeron and P!!!, based system by integrating a high performance North bridge, a Super-South bridge and an AGP4X Slot. SiS633 supports 3-DIMM PC133 SDRAM, bandwidth up to 1.06 GB/s, and also supports an AGP Slot that supports 4X data transfers and Fast Write function.

The "Super-South Bridge" in SiS633 integrates rich peripheral controllers/accelerators / interfaces and is compliant to PC2001. SiS633 offers AC'97 compliant interface, provides interface to Low Pin Count (LPC) operating at 33 MHz clock which is the same as PCI clock on the host, and supports dual USB host controllers with six USB ports that deliver better connectivity and 2 x 12Mb bandwidth. SiS633 supports up to 6 PCI masters. In addition to the PIC, the super-south bridge also incorporates I/O Advanced Programmable Interrupt controller.

The built-in fast IDE controller supports the ATA PIO/DMA, and the Ultra DMA33/66/100 function that supports the data transfer rate up to 100 MB/s. It provides the separate data path for two IDE channels that can eminently improve the performance under the multi-tasking environment.

SiS633 provides one solution to resolve the lack of IO bandwidth for the previous PC platform with PCI bus bandwidth only up to 133MB/s. SiS633 applies the multithreaded architecture - "Build-in Multi-threaded IO Link" to provide enough IO bandwidth up to 1.2GB/s and increase the hardware parallelism. It will increase efficiently the system total throughput and performance, especially for multi-tasking environment.