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SAA7780 Datasheet(PDF) 31 Page - NXP Semiconductors |
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SAA7780 Datasheet(HTML) 31 Page - NXP Semiconductors |
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31 / 70 page  ThunderBird Q3D PCI Audio SAA7780 Accelerator Philips Semiconductors Product Specification 1999 Sep 30 31 These bits correspond to Function 0, Subsystem ID (offset 2Eh) bits 2, 1, and 0, respectively. The Vendor should choose and ID that corresponds to the peripherals present and program the EEPROM accordingly. PCI Data Path The PCI datapath provides the flip flop and multiplexers required to convert the external PCI interface address, data, command and byte enables busses to the internal PM and PS busses. PCI Configuration Registers Since the SAA7780 is a multi-function device, there are three configuration headers. They are defined as the audio configuration header as function 0, the joystick configuration header as function 1, and the UART configuration header defined as function 2. Each configuration space is divided up into two groups, the registers that stay with the PCI interface and the registers that do not. This section will describe the PCI configuration registers that bunk with the PCI interface. These registers include the PCI standard configuration header registers and the base address registers for various blocks in the SAA7780 chip. To be more specific, the registers in the offset config space from 00h - 3Fh are the predefined PCI configuration header. All three PCI configuration header registers will reside with the PCI interface. The remainder of the registers are function specific and can be found in the block section itself. The following sections will detail each of the configuration header spaces for each of the SAA7780 functions: audio, joystick and UART. PCI Configuration Space 0 The following table is a summary of all the PCI configuration space registers. The registers that are block-mates with the PCI interface (offset 00h - 44h) will be detailed following the PCI configuration space table. The remainder of the 003h 12 013h 12 023h 12 033h 12 043h 12 053h 12 004h 11 014h 11 024h 11 034h 11 044h 11 054h 11 005h 10 015h 10 025h 10 035h 10 045h 10 055h 10 006h 9 016h 9 026h 9 036h 9 046h 9 056h 9 007h 8 017h 8 027h 8 037h 8 047h 8 057h 8 008h 7 018h 7 028h 7 038h 7 048h 7 058h 7 009h 6 019h 6 029h 6 039h 6 049h 6 059h 6 00Ah 5 01Ah 5 02Ah 5 03Ah 5 04Ah 5 05Ah 5 00Bh 4 01Bh 4 02Bh 4 03Bh 4 04Bh 4 05Bh 4 00Ch 3 01Ch 3 02Ch 3 03Ch 3 04Ch 3 05Ch 3 00Dh 2 01Dh 2 02Dh 2 03Dh 2 04Dh 2 05Dh 2 00Eh 1 01Eh 1 02Eh 1 03Eh 1 04Eh 1 05Eh 1 00Fh 0 01Fh 0 02Fh 0 03Fh 0 04Fh 0 05Fh 0 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 # |
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