Yamaha YMF724F 3Ch Interrupt Line, 3Dh Interrupt Pin, 3Eh Minimum Grant, 3Fh Maximum Latency

Page 16

YMF724F

3Ch: Interrupt Line

Read / Write

Default: 00h

Access Bus Width: 8, 16, 32-bit

b7

b6

b5

b4

b3

b2

b1

b0

Interrupt Line

b[7:0] ..........Interrupt Line

This register indicates the interrupt channel that INTA# is assigned to.

3Dh: Interrupt Pin

Read Only

Default: 01h

Access Bus Width: 8, 16, 32-bit

b7

b6

b5

b4

b3

b2

b1

b0

Interrupt Pin

b[7:0] ..........Interrupt Pin

DS-1 supports INTA# only. This register is hardwired to 01h.

3Eh: Minimum Grant

Read Only

Default: 05h

Access Bus Width: 8, 16, 32-bit

b7

b6

b5

b4

b3

b2

b1

b0

Minimum Grant

b[7:0] ..........Minimum Grant

This register indicates the length of the burst period required by DS-1. This register is hardwired to 05h.

3Fh: Maximum Latency

Read Only

Default: 19h

Access Bus Width: 8, 16, 32-bit

b7

b6

b5

b4

b3

b2

b1

b0

Maximum Latency

b[7:0] ..........Maximum Latency

This register indicates how often DS-1 generates the Bus Master Request.

This register is hardwired to 19h.

September 21, 1998

-16-

Image 16

Contents Features OverviewGM system level LogosSensaura PIN Configuration YMF724F-VPCI Bus Interface 53-pin PIN DescriptionYMF730AC-2 Interface 6-pin Spdif Interface 1-pin YMF727AC3F2 Interface 9-pinLegacy Device Interface 16-pin Power Supply 39-pin Miscellaneous 15-pinBlock Diagram OPL3System Diagram DOS VMPCI Bus Command Function OverviewPCI Configuration Register 00 01h Vendor ID 04 05h Command02 03h Device ID 06 07h Status 08h Revision ID 09h Programming Interface0Ah Sub-class Code 0Bh Base Class Code0Eh Header Type 0Dh Latency Timer10 13h PCI Audio Memory Base Address 2E-2Fh Subsystem ID 2C-2Dh Subsystem Vendor ID34h Capability Register Pointer 3Ch Interrupt Line 3Dh Interrupt Pin3Eh Minimum Grant 3Fh Maximum Latency40 41h Legacy Audio Control B108 ........SBIRQ Sound Blaster IRQ Channel Select B76 ..........SDMA Sound Blaster DMA-8 Channel SelectB1311 ......MPUIRQ MPU401 IRQ Channel Select 42 43h Extended Legacy Audio Control B1211 ......SMOD SB DMA mode B15..............IMOD Legacy IRQ mode44-45h Subsystem Vendor ID Write Register B1413 ......SBVER SB Version Select46-47h Subsystem ID Write Register 4A-4Bh DS-1 Power Control Register48-49h DS-1 Control Register DPLL1 Disable PLL1 Clock Oscillation PSL0 Power Save Legacy Audio BlockPSL1 Power Save Legacy Audio Block PSN Power Save PCI Audio blockB13..............PR5 AC-2 Power down Control B12..............PR4 AC-2 Power down ControlB1514 ......AC-2 Power down Control 6 4C-4Dh D-DMA Slave Configuration 50h Capability ID52-53h Power Management Capabilities 51h Next Item Pointer54-55h Power Management Control / Status 58-59h Acpi ModeB10 ..........PS Power State B0................ACPI Acpi Mode SelectISA Compatible Device OPL3PCI OPL3 Block OPL3 Status Register ROOPL3 Data Register Array 0 R/W OPL3 Data Register Array 1 R/WSound Blaster Pro Block CMD Sound Blaster Pro Mixer SB Mixer AC-2 B0................SBPDR Sound Blaster Power Down Request SE Scan EnableSM Scan Mode Sbpda Sound Blaster Power Down AcknowledgementF1h Scan In/ Out Data F8h Interrupt Flag RegisterB70 ..........SCAN Data B0................SBI SB Interrupt FlagMPU401 JoystickDMA Emulation Protocol PC/PCIDMA Digital Audio Interface Interrupt RoutingSerialized IRQ Hardware Volume Control Electrical Characteristics Absolute Maximum RatingsDC Characteristics Reset Master ClockPCI Interface Point to Point Input Hold Time for PciclkAC-2 / AC3F2 Master Clock AC-linkAC3F2 Interface Input Hold Time for AbclkAC3F2 Control Interface timing External Dimensions OFFYamaha Corporation