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参数资料
| 型号： | YMF744B |
| 厂商： | Electronic Theatre Controls, Inc. |
| 英文描述： | DS-1S |
| 中文描述： | 的DS - 1秒 |
| 文件页数： | 10/60页 |
| 文件大小： | 303K |
| 代理商： | YMF744B |
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YMF744B
February 3, 1999
-18-
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-1S generates the Bus Master Request.
This register is hardwired to 19h.
40-41h: Legacy Audio Control
Read / Write
Default: 907Fh
Access Bus Width: 8, 16, 32-bit
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
LAD
SIEN
MPUIRQ
SBIRQ
SDMA
I/O
MIEN
MEN
GPEN FMEN SBEN
b0................SBEN: Sound Blaster Enable
This bit enables the mapping of the Sound Blaster Pro block in the I/O space specified by the SBIO bits,
when LAD is set to “0”.
The FM Synthesizer registers can be accessed via SB I/O space, while the SB
block is enabled, even if FMEN is set to “0”.
“0”: Disable the mapping of the SB block to the I/O space
“1”: Enable the mapping of the SB block to the I/O space
(default)
b1................FMEN: FM Synthesizer Enable
This bit enables the mapping of the FM Synthesizer block in the I/O space specified by the FMIO bits,
when LAD is set to “0”.
FM Synthesizer registers can be accessed via SB I/O space, while the SB block
is enabled, even if FMEN is set to “0”.
“0”: Disable the mapping of the FM Synthesizer block to the FMIO space
“1”: Enable the mapping of the FM Synthesizer block to the FMIO space
(default)
After setting FMEN to “1”, about 100 msec is necessary before accessing these I/O space.
b2................GPEN: Gameport Enable
This bit enables the mapping of the Joystick block in the I/O space specified by the JSIO bits, when LAD
is set to “0”.
“0”: Disable the mapping of the Joystick block
“1”: Enable the mapping of the Joystick block
(default)
b3................MEN: MPU401 Enable
This bit enables the mapping of the MPU401 block in the I/O space specified by the MPUIO bits, when
LAD is set to “0”.
“0”: Disable the mapping of the MPU401 block
“1”: Enable the mapping of the MPU401 block
(default)
相关PDF资料 |
PDF描述 |
|---|---|
| YMF752 | AC97 Rev2.1 Audio CODEC with SRC |
| YMF752-S | AC97 Rev2.1 Audio CODEC with SRC |
| YMF753-S | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| YMF753 | AC97 Revision2.2 Audio CODEC with Digital Audio I/F |
| YMF754-R | SPECIALTY MICROPROCESSOR CIRCUIT, PQFP128 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| YMF744BR | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Industrial Control IC |
| YMF744BV | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Industrial Control IC |
| YMF752 | 制造商:YAMAHA 制造商全称:YAMAHA CORPORATION 功能描述:AC97 Rev2.1 Audio CODEC with SRC |
| YMF752-S | 制造商:YAMAHA 制造商全称:YAMAHA CORPORATION 功能描述:AC97 Rev2.1 Audio CODEC with SRC |
| YMF753 | 制造商:YAMAHA 制造商全称:YAMAHA CORPORATION 功能描述:AC97 Revision2.2 Audio CODEC with Digital Audio I/F |
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