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부품번호 | YMF740C 기능 |
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기능 | DS-1L | ||
제조업체 | ETC | ||
로고 | |||
전체 30 페이지수
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
YMF740C
3. AC’97 Interface (6-pin)
name
CRST#
CMCLK
CBCLK
CSDO
CSDI
CSYNC
I/O Type
OT
OC
IT
OT
IT
OT
Size
6mA
-
-
6mA
-
6mA
function
Reset signal for AC’97
Master Clock of AC link (24.576MHz) and
AC-link: Bit Clock for AC’97 audio data
AC-link: AC‘97 Serial audio output data
AC-link: AC’97 Serial audio input data
AC-link: Synchronized signal
4. Miscellaneous (14-pin)
name
VOLUP#
VOLDW#
XI24
XO24
TEST[7:4,2:0]#
TEST3#
LOOPF[1:0]
I/O type
I Tup
I Tup
IC
OC
I Tup
IO Tup
--
size
-
-
-
2mA
-
3mA
-
function
Hardware Volume (Up)
Hardware Volume (Down)
24.576 MHz Crystal
24.576 MHz Crystal
Test pins (Do not connect externally)
Test pin (Connect to ground)
Capacitor of PLL
5. Power Supply (39-pin)
name
PVDD[5:0]
PVSS[14:0]
LVDD
LVSS
VDD3[3:0]
VDD5[3:0]
VSS[7:0]
I/O type
--
--
--
--
--
--
--
size function
- Power supply for PCI Bus Interface (+5.0)
- Ground for PCI Bus Interface
- Power supply for PLL Filter (+3.3)
- Ground for PLL Filter
- Power supply (+3.3V)
- Power supply (+5.0V)
- Ground
TYPE
T : TTL
Ttr : Tri-State TTL
Tup : Pull up (Max. 300kohm) TTL
A : Analog
C : CMOS
P : PCI
Ptr : Tri-State PCI
Pstr : Sustained Tri-Sate PCI
Pod : Open Drain PCI
Note) All pins except the above pins are NC (No Connection) pins. Do not connect externally.
January 14, 1999
-4-
4페이지 YMF740C
FUNCTION OVERVIEW
1. PCI INTERFACE
DS-1L supports the PCI bus interface and complies to PCI revision 2.1.
1-1. PCI Bus Command
DS-1L supports the following PCI Bus commands.
1-1-1. Target Device Mode
C/BE[3:0]#
Command
0 0 0 0 Interrupt Acknowledge (not support)
0 0 0 1 Special Cycle (not support)
0 0 1 0 I/O Read
0 0 1 1 I/O Write
0 1 0 0 reserved
0 1 0 1 reserved
0 1 1 0 Memory Read
0 1 1 1 Memory Write
1 0 0 0 reserved
1 0 0 1 reserved
1 0 1 0 Configuration Read
1 0 1 1 Configuration Write
1 1 0 0 Memory Read Multiple (not support)
1 1 0 1 Dual Address Cycle (not support)
1 1 1 0 Memory Read Line (not support)
1 1 1 1 Memory Write and Invalidate (not support)
DS-1L does not assert DEVSEL# when accessed with commands that are indicated as (not supported) or
reserved.
1-1-2. Master Device Mode
C/BE[3:0]#
01
01
1
1
0
1
Command
Memory Read
Memory Write
When DS-1L becomes a Master Device, it generates only memory write and read cycle commands.
January 14, 1999
-7-
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YMF740C | DS-1L | ETC |
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