CS5530A datasheet(15/259 Pages) AMD

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AMD Geode™ CS5530A Companion Device Data Book

Architecture Overview

Revision 1.1

2.5

IDE Controllers

The CS5530A integrates two PCI bus mastering, ATA-4

compatible IDE controllers. These controllers support Ultra

DMA/33 (enabled in Microsoft® Windows 95 and Windows

NT® by using a driver provided by AMD), Multiword DMA,

and Programmed I/O (PIO) modes. Two devices are sup-

ported on each controller. The data-transfer speed for each

device on each controller can be independently pro-

grammed. This allows high-speed IDE peripherals to coex-

ist on the same channel as lower speed devices. Faster

devices must be ATA-4 compatible.

2.6

Power Management

The CS5530A integrates advanced power management

features including:

• Idle timers for common system peripherals

• Address trap registers for programmable address

ranges for I/O or memory accesses

• Up to eight programmable GPIOs

• Clock throttling with automatic speedup for the CPU

clock

• Software CPU stop clock

• Save-to-Disk/RAM with peripheral shadow registers

• Dedicated serial bus to/from the GX1 processor

providing CPU power management status

The CS5530A is an ACPI (Advanced Control and Power

Interface) compliant chipset. An ACPI compliant system is

one whose underlying BIOS, device drivers, chipset and

peripherals conform to revision 1.0 or newer of the ACPI

specification. The “Fixed Feature” and “General Purpose”

registers are virtual. They are emulated by the SMI han-

dling code rather than existing in physical hardware. To the

ACPI compliant operating system, the SMI-base virtualiza-

tion is transparent; however, to eliminate unnecessary

latencies, the ACPI timer exists in physical hardware.

The CS5530A V-ACPI (Virtual ACPI) solution provides the

following support:

• CPU States — C1, C2

• Sleep States — S1, S2, S4, S4BIOS, S5

• Embedded Controller (Optional) — SCI and SWI event

inputs.

• General Purpose Events — Fully programmable GPE0

Event Block registers.

2.6.1

GPIO Interface

Eight GPIO pins are provided for general usage in the sys-

tem. GPIO[3:0] are dedicated pins and can be configured

as inputs or outputs. GPIO[7:4] can be configured as the

upper addresses of the ISA bus, SA[23:20]. All GPIOs can

also be configured to generate an SMI on input edge tran-

sitions.

2.7

XpressAUDIO™ Subsystem

XpressAUDIO™ architecture in the CS5530A offers a com-

bined hardware/software support solution to meet industry

standard audio requirements. XpressAUDIO architecture

uses VSA technology along with additional hardware fea-

tures to provide the necessary support for industry stan-

dard 16-bit stereo synthesis and OPL3 emulation.

The hardware portion of the XpressAUDIO subsystem can

broadly be divided into two categories. Hardware for:

• Transporting streaming audio data to/from the system

memory and an AC97 codec.

• VSA technology support.

2.7.1

AC97 Codec Interface

The CS5530A provides an AC97 Specification Revision

1.3, 2.0, and 2.1 compatible interface. Any AC97 codec

which supports an independent input and output sample

rate conversion interface can be used with the CS5530A.

This type of codec allows for a design which meets the

requirements for PC97 and PC98-compliant audio as

defined by Microsoft Corporation. Figure 2-2 shows the

codec and CS5530A signal connections. For specifics on

the serial interface, refer to the appropriate codec manufac-

turer’s data sheet.

Low latency audio I/O is accomplished by a buffered PCI

bus mastering controller.

Figure 2-2. AC97 Codec Signal Connections

2.7.2

VSA Technology Support Hardware

The CS5530A companion device incorporates the required

hardware in order to support VSA technology for the cap-

ture and playback of audio using an external codec. This

eliminates much of the hardware traditionally associated

with industry standard audio functions.

XpressAUDIO software provides 16-bit compatible sound.

This software is available to OEMs for incorporation into

the system BIOS ROM.

BITCLK

PC_BEEP

SDAT_I

SDAT_O

PC_BEEP

SDATA_IN

SDATA_OUT

AC97

Geode™

BIT_CLK

24.576 MHz

SYNC

Codec

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