SAA7785 Datasheet, PDF (62/68 Pages) NXP Semiconductors – ThunderBird Avenger PCI Audio Accelerator

Philips Semiconductors
ThunderBird Avenger^TM PCI Audio
Accelerator
Preliminary Specification
SAA7785
UARTBASE[15:8]
POR Value
0
0
0
0
0
0
0
0
D7
D6
D5
D4
D3
D2
D1
D0
UARTBASE[7:3]
R
R
IO
POR Value
0
0
0
0
0
0
0
1
Bit
31:3
Name
UART-
BASE
2:1 R
0
IO
R/W
RW
RO
RO
Function
16650 UART base address. The address should be on a 8 byte boundary. For ref-
erence, 550 compatible UART legacy base addresses are 3E8h, 338h, 2E8h,
220h, 238h, 2E0h, 228h, 3F8h, and 2F8h.
Reserved. These bits are reserved and always return zeros for plug and play.
I/O flag. This read only bit indicates that this is an I/O range.
TABLE 63 Subsystem Vendor ID - SUBVENID (RO)
PCI CFG 2
D15
D14
D13
D12
D11
D10
D9
D8
Offset 2Ch
SUBVEN_ID[15:8]
POR Value
0
0
0
1
0
0
0
0
D7
D6
D5
D4
D3
D2
D1
D0
SUBVEN_ID[7:0]
POR Value
0
0
0
0
0
1
0
0
Bit
15:0
Name
SUBVEN_ID
R/W
RO
Function
Subsystem Vendor ID. The Subsystem Vendor ID register allows the manu-
facturer to uniquely identify their board since more than one board OEM may
use the SSA7785 ThunderBird Avenger™ chip. The Subsystem Vendor ID
register is loaded by an external EEPROM via the Serial Configuration Port
after reset and before any access to the PCI configuration header. The PCI
target logic should force a retry if the Subsystem Vendor ID register has not
completed loading. The Subsystem Vendor ID is read only to the PCI inter-
face. If no external EEPROM is present, then the default Subsystem Vendor
ID is 1004h, that of Philips Semiconductors (VLSI).
TABLE 64 Subsystem ID - SUBSYSID (RO)
PCI CFG 2
D15
D14
D13
D12
D11
D10
D9
D8
1999 Nov 12
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