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參數(shù)資料
| 型號： | AK4704 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | 2ch 24bit DAC with AV SCART switch |
| 中文描述： | 2通道24位DAC，具有影音SCART開關(guān) |
| 文件頁數(shù)： | 16/44頁 |
| 文件大?。?/td> | 440K |
| 代理商： | AK4704 |
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ASAHI KASEI
AKM CONFIDENTIAL
[AK4704]
Rev. 0.5
2004/1
- 16 -
OPERATION OVERVIEW
1. System Reset and Power-down options
The AK4704 should be reset once by bringing PDN pin = “L” upon power-up. The AK4704 has several operation modes.
The PDN pin, AUTO bit, DAPD bit, MUTE bit and STBY bit control operation modes as shown in Table 1 and Table 2.
PDN
pin
bit
bit
0
“L”
*
*
Mode
AUTO
STBY
MUTE
bit
*
DAPD
bit
*
Mode
Full Power-down
Auto Startup mode
(power-on default)
Standby & mute
Standby
Mute
(DAC power down)
Mute
(DAC operation)
Normal operation
(DAC power down
& Analog input)
Normal operation
(DAC operation)
1
“H”
1
*
*
*
2
3
“H”
“H”
0
0
1
1
1
0
*
*
4
“H”
0
0
1
1
5
“H”
0
0
1
0
6
“H”
0
0
0
1
7
“H”
0
0
0
0
*: Don’t Care
Table 1. Operation Mode Settings
Mode
Register
Control
MCLK,
BICK,
LRCK
Audio Bias
Level
Video
Output
TVFB,
TVSB
VCRSB
0
Full Power-down
NOT
available
Not
needed
Power
down
Hi-Z
Hi-Z
Pull-
Down
(**)
1
Auto Startup mode
(power-on default)
No video
input
Video
input (***)
Available
Active
Active
(****)
Hi-Z/
Active
Active
Active
2
Standby & mute
Power
down
Active
Power
down
3
Standby
Mute
4
(DAC power down)
Mute
(DAC operation)
Normal operation
(DAC power down
& Analog input)
Normal operation
(DAC operation)
5
Needed
6
Not
needed
Active (*)
7
Needed
(*): TVOUTL/R are muted by VMUTE bit in the default state.
(**): Internally pulled down by 120kohm(typ) resister.
(***): Video input to TVVIN or VCRVIN.
(****): VCRC outputs 0V for termination.
Table 2. Status of each operation modes
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