Features: * DirectX timer for video/audio synchronization
*Forward pin-compatible with future PCI audio accelerators
* 100-pin TQFP package
* 3.3V operation Software Support
* Complete DirectX driver suite (DirectSound3D, DirectSound, DirectMusic, and DirectInput) for Windows
*PCI 2.1-compliant with Bus Mastering optimized for multiple stream operation
*On-chip per voice cache minimizes PCI bandwidth
* Up to 20X improvement over ISA DMA on PCI bus bandwidth utilization
*Configuration installation, and diagnostics under real mode DOS, WindowsWindows 95, and Windows 98 DOS box
*Windows 3.1, 95, NT4.0, Windows 98/NT5.0 configuration, installation, and mixer program
*1, 2, 4, or 8 Mbytes General MIDI (GM)/General Sound (GS) compliant sample LibraryPinout
DescriptionLM4560 is an advanced PCI audio accelerator providing full legacy compatibility, wavetable synthesis, DirectMusic, DirectSound, and DirectSound3D on a single chip for the highperformance,
cost-sensitive consumer market. It supports Sound Blaster functionality and is fully PC98 compliant. The LM4560 integrates a 64-voice wave table engine with per voice effect processing capability. It supports the upcoming Microsoft™ DirectMusic API and is fully compatible with DLS Level 1 (downloadable samples) specification. ThLM4560 is optimized for Microsoft Windows™ 98 and Windows NT5.0 WDM streaming architecture with re-routable end-point support. The LM4560 includes DirectSound3D accelerationhardware for ITD (Interaural Time Difference), IID (Interaural Intensity Difference), Pan, Delay, and Doppler hardware.
The LM4560 supports Sound Blaster Pro/16 DOS games while improving gaming audio quality. The LM4560 supports both the legacy analog gameport and a Digital Enhanced Game Port. When coupled with DirectInput™ driver, the Digital Enhanced Game Port can save up to 12% of the CPU overhead nominally required by a conventional analog game port. The LM4560 employs a high precision 26-bit digital mixer, providing an accurate 20-bit output and higher than 90 dB signal-to-noise ratio when used with high quality AC97 Rev 1.03 and Rev 2.0 codecs.
The LM4560 is designed with aggressive power management.It is PCI Bus Power Management Interface (PPMI 1.0)-compliant. The LM4560 supports multiple Rev 2.0 AC97 codecs, which are useful for notebook docking systems. With a low power, 3.3V process and a space conscious 100 TQFP package, the LM4560 is also well suited for Notebook systems. In summary, the LM4560 provides a balanced combination of features and performance to the end-user. By combining PCI bus mastering for DirectSound acceleration, Hardware Wave table synthesizer, Digital Enhanced Game Port and DirectSound 3D audio acceleration. It delivers high performance, high quality audio, high-end features with efficient power management in a space-efficient 100 TQFP package.
LM4560 Data Sheet
