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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)： | 13/44頁 |
| 文件大?。?/td> | 269K |
| 代理商： | AD1817A |
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AD1817A
–13–
REV. 0
PRELIMINARY
DATA
TECHNICAL
Digital Ground.
Hardware Volume Pins
Pin Name
PQFP
I/O
Description
VOL_DN
*
2, 99, 100
I
Master Volume Down. Modifies output level on pins L_OUT and R_OUT .
Contains a 10 k
internal pull-up resistor. When asserted LO, decreases Master
Volume by 1.5 dB/sec. Must be asserted at least 25 ms to be recognized. When
asserted simultaneously with VOL_UP, output is muted. Output level modifica-
tion reflected in indirect register 0
×
29.
Master Volume Up. Modifies output level on pins L_OUT and R_OUT . Con-
tains a 10 k
internal pull-up resistor. When asserted LO, increases Master
Volume by 1.5 dB/sec. Must be asserted at least 25 ms to be recognized. When
asserted simultaneously with VOL_UP, output is muted. Output level modifica-
tion reflected in indirect register 0
×
29.
Analog Volume Control Input.
VOL_UP*
1, 98
I
A_VOL
31
I
Control Pins
Pin Name
PQFP
I/O
Description
X CT L0*
68
O
indexed register. T his pin is an open drain driver.
External Control 1. T he state of this pin (T T L HI or LO) is reflected in codec
indexed register. Open drain, 8 mA active 0.5 mA pull-up resistor.
Ring Indicator. Used to accept the ring indicator flag from the DAA.
X CT L1*
69
O
RING*
69
I
Power Supplies
Pin Name
PQFP
I/O
Description
V
CC
GNDA
V
DD
33
34
23, 62, 71,
89, 95
3*, 24, 65,
70, 84, 90,
96, 99*, 100*
26, 27, 32
I
I
I
Analog Supply Voltage (+5 V).
Analog Ground.
Digital Supply Voltage (+5 V).
GND
I
NC
No Connect.
Optional E E PROM Pins
Pin Name
PQFP
I/O
Description
EE_CLK
EE_DAT A
58
57
O
I
EEPROM Clock.
EEPROM Data.
*T he position of this pin location/function is dependent on the EEPROM data.
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