參數(shù)資料
型號： AD1817A
廠商： Analog Devices, Inc.
英文描述： Multimedia Audio Subsystem For Concurrently Processing Multiple Digital Streams Of 16-bit Stereo Audio In Personal Computers.(可處理個人電腦的16位立體聲多重數(shù)字流的多媒體聲音子系統(tǒng))
中文描述： 多媒體音頻子系統(tǒng)，為同時處理中的16多個數(shù)字信息流，在個人電腦。位立體聲音頻（可處理個人電腦的16位立體聲多重數(shù)字流的多媒體聲音子系統(tǒng)）
文件頁數(shù)： 32/44頁
文件大小： 269K
代理商： AD1817A
AD1817A
–32–
REV. 0
TECHNICAL
PT B
PDA
Power-Down T ime Base. 1 = timer set to 100 ms, 0 = timer set to 10
μ
s.
Power-down count reload on Digital Activity; “1” = Reload count on Digital Activity. Digital Activity is defined as any
activity on FM or PLAYBACK ).
Power-down count reload on Analog Activity; “1” = Reload count on Analog Activity. Analog Activity is defined as any
analog input unmuted (LINE, CD, SYNT H, MIC, PHONE_IN) or MAST ER VOLUME unmuting.
Power-down count reload on ISA Read; “1” = Reload count on ISA read. ISA Read is defined as a read from any active
logical device inside the AD1817A.
Power-down count reload on ISA Write; “1” = Reload count on ISA write. ISA Write defined as a write to any active
logical device inside the AD1817A.
Chip Power-down
1
Power-Down;
0
Power-Up
For Power-up, software should poll the [SSBASE+0] CRY bit for “1” before writing or reading any logical device.
PAA
PIR
PIW
CPD
[45] VE RSION ID
7
DE F AUL T = [0x0000]
2
6
5
4
3
2
1
0
7
6
5
4
3
1
0
VER [15:8]
VER [7:0]
[46] RE SE RVE D
7
DE FAULT = [0x0000]
2
6
5
4
3
2
1
0
7
6
5
4
3
1
0
RES
RES
T est register. Should never be written or read under normal operation.
SB Pro; AdLib Registers
T he AD1817A contains sets of ISA Bus registers (ports) that correspond to those used by the SoundBlaster Pro audio card from
Creative Labs and the AdLib audio card from AdLib Multimedia. T able IX lists the ISA Bus SoundBlaster Pro registers. T able X
lists the ISA Bus AdLib registers. Because the AdLib registers are a subset of those in the SoundBlaster card, you can find complete
information on using both of these registers in the
Developer Kit for SoundBlaster Series, 2nd ed. 1993
, Creative Labs, Inc., 1901
McCarthy Blvd., Milpitas, CA 95035.
T able VIII. SoundBlaster Pro ISA Bus Registers
Register Name
Music0: Address (w), Status (r)
Music0: Data (w)
Music1: Address (w)
Music1: Data (w)
Mixer Address (w)
Mixer Data (w)
Reset (w)
Music0: Address (w)
Music0: Data (w)
Input Data (r)
Status (r), Output Data (w)
Status (r)
0x(SB Base) Relocatable in range 0x010 – 0x3F0
0x(SB Base+1)
0x(SB Base+2)
0x(SB Base+3)
0x(SB Base+4)
0x(SB Base+5)
0x(SB Base+6)
0x(SB Base+8)
0x(SB Base+9)
0x(SB Base+A)
0x(SB Base+C)
0x(SB Base+E)
T able IX . AdLib ISA Bus Registers
Register Name
ISA Bus Address
Music0: Address (w), Status (r)
Music0: Data (w)
Music1: Address (w)
Music1: Data (w)
0x(AdLib Base) Relocatable in range 0x008 – 0x3F8
0x(AdLib Base+1)
0x(AdLib Base+2)
0x(AdLib Base+3)
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