AMD SC1201, SC1200 manual Feature List

Core Logic Module 32579B

Core Logic Module6

The Core Logic module is an enhanced PCI-to-Sub-ISA bridge (South Bridge), this module is ACPI-compliant, and provides AT/Sub-ISA functionality. The Core Logic module also contains state-of-the-art power management. Two bus mastering IDE controllers are included for support of up to four ATA-compliant devices. A three-port Universal Serial Bus (USB) provides high speed, and Plug & Play expan- sion for a variety of new consumer peripheral devices.

6.1Feature List

Internal Fast-PCI Interface

The internal Fast-PCI bus interface is used to connect the Core Logic and GX1 modules of the SC1200/SC1201 pro- cessor. This interface includes the following features:

•PCI protocol for transfers on Fast-PCI bus

•Up to 66 MHz operation

•Subtractive decode handled internally in conjunction with external PCI bus

Bus Mastering IDE Controllers

•Two controllers with support for up to four IDE devices

•Independent timing for master and slave devices for both channels

•PCI bus master burst reads and writes

•Multiword DMA support

•Programmed I/O (PIO) Modes 0-4 support

Universal Serial Bus

•Three independent USB interfaces

•Open Host Controller Interface (OpenHCI) specification compliant

PCI Interface

•PCI 2.1 compliant

•PCI master for AC97 and IDE controllers

•Subtractive agent for unclaimed transactions

•Supports PCI initiator-to-Sub-ISA cycle translations

•PCI-to-Sub-ISA interrupt mapper/translator

•External PCI bus

—Devices internal to the Core Logic module (IDE, Audio, USB, Sub-ISA, etc.) cannot master to memory through the external PCI bus.

—Legacy DMA is not supported to memory located on external PCI bus.

—The Core Logic module does not transfer subtrac- tively decoded I/O cycles originating from the external PCI bus.

AT Compatibility

•8259A-equivalent interrupt controllers

•8254-equivalent timer

•8237-equivalent DMA controllers

•Port A, B, and NMI logic

•Positive decode for AT I/O space

Sub-ISA Interface

•Boot ROM chip select

•Extended ROM to 16 MB

•Two general-purpose chip selects

•NAND Flash support

•M-Systems DiskOnChip support

•Is not the subtractive decode agent

Power Management

•Automated CPU 0V Suspend modulation

•I/O Traps and Idle Timers for peripheral power manage- ment

•Software SMI and Stop Clock for APM support

•ACPI-compliant timer and register set

•Up to 22 GPIOs of which all can generate Power Management Interrupts (PMEs)

•Three Dedicated GPWIOs powered by VSBL and VSB

•Shadow register support for legacy controllers for 0V Suspend

AMD Geode™ SC1200/SC1201 Processor Data Book 141