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SAA7780 Datasheet(PDF) 30 Page - NXP Semiconductors

Part # SAA7780
Description  ThunderBird Q3D PCI Audio Accelerator
PDF  70 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

SAA7780 Datasheet(HTML) 30 Page - NXP Semiconductors

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ThunderBird Q3D PCI Audio
SAA7780
Accelerator
Philips Semiconductors
Product Specification
1999 Sep 30
30
FIGURE 5
In each of the three SAA7780 functions PCI configuration space there is a Subsystem Vendor ID register at an offset of
2Ch and a Subsystem ID register at an offset of 2Eh. Each register is 16 bits in length and is write-only by the serial
EEPROM and read-only from the PCI interface. The data from the EEPROM is loaded into the registers immediately
after PCI reset. If no EEPROM is detected, the default values are loaded as shown and reflect the default values for the
System ID and Vendor ID for that function.
Subsystem Register Default Values
The EEPROM contains bits 000h through 3FFh. Only bits 000h through 05Fh are utilized to program the Subsystem ID
and Subsystem Vendor ID registers. The bit assignments between the EEPROM and the configuration registers are
shown below.
EEPROM BIT Assignments to Subsystem Registers
Function
Device Type
Offset
Register Name
Default Value
0
Audio Subsystem
2Ch
Subsystem Vendor ID
1004h
0
Audio Subsystem
2Eh
Subsystem ID
0304h
1
Joystick
2Ch
Subsystem Vendor ID
1004h
1
Joystick
2Eh
Subsystem ID
0305h
2
16650 UART
2Ch
Subsystem Vendor ID
1004h
2
16650 UART
2Eh
Subsystem ID
0306h
Function 0 - Audio Subsystem
Function 1 - Joystick
Function 2 - 16650 Modem UART
Subsystem
Vendor ID - Offset
2Ch
Subsystem ID -
Offset 2Eh
Subsystem
Vendor ID - Offset
2Ch
Subsystem ID -
Offset 2Eh
Subsystem
Vendor ID - Offset
2Ch
Subsystem ID -
Offset 2Eh
EEPROM
Bit #
Reg
Bit #
EEPROM
Bit #
Reg
Bit #
EEPROM
Bit #
Reg
Bit #
EEPROM
Bit #
Reg
Bit #
EEPROM
Bit #
Reg
Bit #
EEPROM
Bit #
Reg
Bit #
000h
15
010h
15
020h
15
030h
15
040h
15
050h
15
001h
14
011h
14
021h
14
031h
14
041h
14
051h
14
002h
13
012h
13
022h
13
032h
13
042h
13
052h
13
ThunderBird
EEPROM
CFGDAT
CFGCLK
SDA
SCL
WP
+5V



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