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PDF YMF740C Data sheet ( Hoja de datos )
| Número de pieza | YMF740C | |
| Descripción | DS-1L | |
| Fabricantes | ETC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de YMF740C (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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YMF740C
DS-1L
OVERVIEW
YMF740C (DS-1L) is a high performance audio controller for the PCI Bus. DS-1L consists of two separated
functional blocks. One is the PCI Audio block and the other is the Legacy Audio block. PCI Audio block
allows Software Driver to handle maximum of 41 concurrent audio streams with the Bus Master DMA engine.
The PCI Audio Engine converts the sampling rate of each audio stream and the streams are mixed without
utilizing the CPU or causing system latency. By using the Software Driver from YAMAHA, PCI Audio
provides 32-voice XG wavetable synthesizer with Reverb and variation. It also supports DirectSound hardware
accelerator, Downloadable Sound (DLS) and DirectMusic accelerator.
Legacy Audio block supports FM Synthesizer, Sound Blaster Pro, MPU401 UART mode and Joystick
function in order to provide hardware compatibility for numerous PC games on real DOS without any software
driver. To achieve legacy DMAC compatibility on the PCI, DS-1L supports PC/PCI protocols.
DS-1L supports the connection to AC’97 which provides high quality DAC, ADC and analog mixing.
FEATURES
• PCI 2.1 Compliant
• PC’97/PC’98 specification Compliant
• PCI Bus Power Management rev. 1.0 Compliant
(Support D0, D2 and D3 state)
• PCI Bus Master for PCI Audio
True Full Duplex Playback and Capture with
different Sampling Rate
Maximum 32-voice XG capital Wavetable
Synthesizer including GM compatibility
DirectSound Hardware Acceleration
DirectMusic Hardware Acceleration
Downloadable Sound (DLS) level-1
• Supports PC/PCI DMA for legacy DMAC (8237)
emulation
• Legacy Audio compatibility
FM Synthesizer
Hardware Sound Blaster Pro compatibility
MPU401 UART mode MIDI interface
Joystick
• Supports AC’97 Interface (AC-Link)
• Hardware Volume Control
• Single Crystal operation (24.576MHz)
• 5V Power supply for I/O. 3.3V Power supply for
Internal core logic
• 144-pin LQFP (YMF740C-V)
GENERAL MIDI logo is a trademark of Association of Musical Electronics Industry (AMEI),
and indicates GM system level 1 Compliant.
XG logo is a trademark of YAMAHA Corporation.
YAMAHA CORPORATION
YMF740C CATALOG
CATALOG No.:LSI-4MF740C20
SeJpantueamryb14e,r129919, 1998
1 page  
YMF740C
BLOCK DIAGRAM
PC-PCI
Legacy Audio
SB Pro
FM
MPU401
Joystick
Rate Converter
/ Mixer
PCI Bus
Interface
BUS Master
DMA Controller
Memory
PCI Audio
XG Synthesizer
Direct Sound Acc.
Wave In/Out
AC'97
Interface
January 14, 1999
-5-
5 Page 
YMF740C
08h: Revision ID
Read Only
Default: 03h
Access Bus Width: 8, 16, 32-bit
b7 b6 b5 b4 b3 b2 b1 b0
Revision ID
b[7:0] ..........Revision ID
This register contains the revision number of DS-1L. This register is hardwired to 03h.
09h: Programming Interface
Read Only
Default: 00h
Access Bus Width: 8, 16, 32-bit
b7 b6 b5 b4 b3 b2 b1 b0
Programming Interface
b[7:0] ..........Programming Interface
This register indicates the programming interface of DS-1L. This register is hardwired to 00h.
0Ah: Sub-class Code
Read Only
Default: 01h
Access Bus Width: 8, 16, 32-bit
b7 b6 b5 b4 b3 b2 b1 b0
Sub-class Code
b[7:0] ..........Sub-class Code
This register indicates the sub-class of DS-1L. This register is hardwired to 01h. DS-1L belongs to the
Audio Sub-class.
0Bh: Base Class Code
Read Only
Default: 04h
Access Bus Width: 8, 16, 32-bit
b7 b6 b5 b4 b3 b2 b1 b0
Base Class Code
b[7:0] ..........Base Class Code
This register indicates the base class of DS-1L. This register is hardwired to 04h. DS-1L belongs to
the Multimedia Base Class.
January 14, 1999
-11-
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet YMF740C.PDF ] | |
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