SC2200 datasheet(268/433 Pages) NSC

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268

Revision 3.0

Core Logic Module (Continued)

5.4.4

XpressAUDIO Registers - Function 3

The register designated as Function 3 (F3) is used to con-

figure the PCI portion of support hardware for the Xpres-

sAUDIO registers. The bit formats for the PCI Header

registers are given in Table 5-37.

A Base Address register (F3BAR0), located in the PCI

Header registers of F3, is used for pointing to the register

space designated for support of XpressAUDIO, described

later in this section.

Table 5-37. F3: PCI Header Registers for XpressAUDIO Audio Configuration

Bit

Description

Index 00h-01h

Vendor Identification Register (RO)

Reset Value: 100Bh

Index 02h-03h

Device Identification Register (RO)

Reset Value: 0503h

Index 04h-05h

PCI Command Register (R/W)

Reset Value: 0000h

15:3

Reserved. (Read Only)

Bus Master. Allow the Core Logic module bus mastering capabilities.

0: Disable.

1: Enable. (Default)

This bit must be set to 1.

Memory Space. Allow the Core Logic module to respond to memory cycles from the PCI bus.

0: Disable.

1: Enable.

This bit must be enabled to access memory offsets through F3BAR0 (See 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 - F3BAR0 (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 VSA SMIs. Bits [11:0] are read only (0000 0000 0000), indicat-

ing a 4 KB memory address range. Refer to Table 5-38 on page 269 for the XpressAUDIO configuration register bit formats and reset

values.

31:12

XpressAUDIO Interface Base Address

11:0

Address Range. (Read Only)

Index 14h-2Bh

Reserved

Reset Value: 00h

Index 2Ch-2Dh

Subsystem Vendor ID (RO)

Reset Value: 100Bh

Index 2Eh-2Fh

Subsystem ID (RO)

Reset Value: 0503h

Index 30h-FFh

Reserved

Reset Value: 00h

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