CS5530 datasheet(188/241 Pages) NSC

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Revision 4.1

4.3.4

XpressAUDIO Registers - Function 3

The register space for XpressAUDIO is divided into two

sections. The first section is used to configure the PCI

portion of the audio interface hardware. A Base Address

address of where the second portion of the register space

is located. This second section contains the control and

data registers of the audio interface.

Table 4-19 shows the PCI header registers of F3. The

memory mapped registers accessed through F3BAR are

shown in Table 4-20.

Table 4-19. F3 Index xxh: PCI Header Registers for XpressAUDIO

Bit

Description

Index 00h-01h

Vendor Identification Register (RO)

Reset Value = 1078h

Index 02h-03h

Device Identification Register (RO)

Reset Value = 0103h

Index 04h-05h

PCI Command Register (R/W)

Reset Value = 0000h

15:3

Reserved (Read Only)

Enable Mastering: 0 = Disable, 1 = Enable

Memory Space: Allow CS5530 to respond to memory cycles from the PCI bus: 0 = Disable; 1 = Enable.

This bit must be enabled to access memory offsets through F3BAR (F3 Index 10h).

Reserved (Read Only)

Index 06h-07h

PCI Status Register (RO)

Reset Value = 0280h

Index 08h

Device Revision ID Register (RO)

Reset Value = 00h

Index 09h-0Bh

PCI Class Code Register (RO)

Reset Value = 040100h

Index 0Ch

PCI Cache Line Size Register (RO)

Reset Value = 00h

Index 0Dh

PCI Latency Timer Register (RO)

Reset Value = 00h

Index 0Eh

PCI Header Type (RO)

Reset Value =00h

Index 0Fh

PCI BIST Register (RO)

Reset Value = 00h

Index 10h-13h

Base Address Register - F3BAR (R/W)

Reset Value = 00000000h

This register sets the base address of the memory mapped audio interface control register block. This is a 128 byte block of registers

used to control the audio FIFO and codec interface, as well as to support SMIs produced by VSA technology. Bits [6:0] are read only

(0000 0000), indicating a 128 byte memory address range. Refer to Table 4-20 for the bit formats and reset values of the XpressAU-

DIO registers.

31:7

Audio Interface Base Address

6:0

Address Range (Read Only)

Index 14h-FFh

Reserved

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