AMD Geode SC1201 - Manual (Page 262)

262 AMD Geode™ SC1200/SC1201 Processor Data Book
Core Logic Module - Audio Registers - Function 3 32579B
6.4.4 Audio Registers - Function 3
The register designated as Function 3 (F3) is used to con-
figure the PCI portion of support hardware for the audio
registers. The bit formats for the PCI Header registers are
given in Table 6-37. 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 audio, described later in
this section.
Table 6-37. F3: PCI Header Registers for 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)
2 Bus Master. Allow the Core Logic module bus mastering capabilities.
0: Disable.
1: Enable. (Default)
This bit must be set to 1.
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).
0 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 6-38 on page 263 for the audio configuration register bit formats and reset values.
31:12 Audio 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