Yamaha YMF724F specifications B12..............PR4 AC-2 Power down Control

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YMF724F

b12..............PR4: AC-2 Power down Control 4

This bit controls the power state of the AC-linkin AC-2.

“0”:	Normal	(default)
“1”:	Power down

b13..............PR5: AC-2 Power down Control 5

Setting this bit to “1” disables the internal clock of AC-2. In case AC-2 is used with DS-1, the master clock is supplied from DS-1. Therefore, when the clock of AC-2 is stopped completely, set both PR5

and PSN bits to “1”.
“0”: Normal	(default)
“1”: Disable

b[15:14] ......AC-2 Power down Control 6 and 7

The function of this bit is not supported by YAMAHA AC-2 chip. But the software can access this register without causing an error.

Master

(24.576MHz)

DMC

PLL0

33.87MHz

DPLL0

PSL0

PSL1

PSN

Legacy func. 0

OPL3

SB Pro

Legacy func. 1

MPU401

Joystick

PCICLK (33MHz)

PLL1

49.152MHz

DPLL1

PCI func. 0

AC3F2 I/F AC-2 I/F H/W Vol. PCI Audio

SRC

SPDIF

PCI func. 1

PCI I/F

PC/PCI

D-DMA

S-IRQ

-Set DPLL0, DPLL1, PSL0, PSL1 and PSN bits to “1”, when DMC bit is set to “1”.

-Set PSL0 and PSL1 bits to “1”, when DPLL0 bit is set to “1”.

-Set PSN bit to “1”, when DPLL1 bit is set to “1”.

September 21, 1998

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Contents Overview FeaturesSensaura LogosGM system level YMF724F-V PIN ConfigurationYMF730AC-2 Interface 6-pin PIN DescriptionPCI Bus Interface 53-pin Legacy Device Interface 16-pin YMF727AC3F2 Interface 9-pinSpdif Interface 1-pin Miscellaneous 15-pin Power Supply 39-pinOPL3 Block DiagramDOS VM System DiagramFunction Overview PCI Bus CommandPCI Configuration Register 02 03h Device ID 04 05h Command00 01h Vendor ID 06 07h Status 0Bh Base Class Code 08h Revision ID09h Programming Interface 0Ah Sub-class Code10 13h PCI Audio Memory Base Address 0Dh Latency Timer0Eh Header Type 34h Capability Register Pointer 2C-2Dh Subsystem Vendor ID2E-2Fh Subsystem ID 3Fh Maximum Latency 3Ch Interrupt Line3Dh Interrupt Pin 3Eh Minimum Grant40 41h Legacy Audio Control B1311 ......MPUIRQ MPU401 IRQ Channel Select B76 ..........SDMA Sound Blaster DMA-8 Channel SelectB108 ........SBIRQ Sound Blaster IRQ Channel Select 42 43h Extended Legacy Audio Control B1413 ......SBVER SB Version Select B1211 ......SMOD SB DMA modeB15..............IMOD Legacy IRQ mode 44-45h Subsystem Vendor ID Write Register48-49h DS-1 Control Register 4A-4Bh DS-1 Power Control Register46-47h Subsystem ID Write Register PSN Power Save PCI Audio block DPLL1 Disable PLL1 Clock OscillationPSL0 Power Save Legacy Audio Block PSL1 Power Save Legacy Audio BlockB1514 ......AC-2 Power down Control 6 B12..............PR4 AC-2 Power down ControlB13..............PR5 AC-2 Power down Control 50h Capability ID 4C-4Dh D-DMA Slave Configuration51h Next Item Pointer 52-53h Power Management CapabilitiesB0................ACPI Acpi Mode Select 54-55h Power Management Control / Status58-59h Acpi Mode B10 ..........PS Power StateOPL3 ISA Compatible DevicePCI OPL3 Status Register RO OPL3 BlockOPL3 Data Register Array 1 R/W OPL3 Data Register Array 0 R/WSound Blaster Pro Block CMD Sound Blaster Pro Mixer SB Mixer AC-2 Sbpda Sound Blaster Power Down Acknowledgement B0................SBPDR Sound Blaster Power Down RequestSE Scan Enable SM Scan ModeB0................SBI SB Interrupt Flag F1h Scan In/ Out DataF8h Interrupt Flag Register B70 ..........SCAN DataJoystick MPU401PC/PCI DMA Emulation ProtocolDMA Serialized IRQ Interrupt RoutingDigital Audio Interface Hardware Volume Control Absolute Maximum Ratings Electrical CharacteristicsDC Characteristics Master Clock ResetPoint to Point Input Hold Time for Pciclk PCI InterfaceAC-link AC-2 / AC3F2 Master ClockInput Hold Time for Abclk AC3F2 InterfaceAC3F2 Control Interface timing OFF External DimensionsYamaha Corporation