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參數(shù)資料
| 型號： | AK4702 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | 2CH DAC WITH AV SCART SWITCH |
| 中文描述： | 2聲道DAC，具有影音SCART開關(guān) |
| 文件頁數(shù)： | 20/38頁 |
| 文件大?。?/td> | 308K |
| 代理商： | AK4702 |
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ASAHI KASEI
[AK4702]
MS0187-E-00
2002/11
- 20 -
n
System Reset and Power-down control
The AK4702 should be reset once by bringing PDN = “L” upon power-up. The AK4702 has several power-down modes.
The PDN pin, MUTE bit and STBY bit control them as shown in Table 9 and Table 10.
PDN pin: Power down pin.
“H”: Normal operation
“L”: Device power down.
MUTE bit: Analog Mute bit.
“1”: Mute all analog outputs
“0”: Normal operation
STBY bit : Standby bit.
“1”: Standby mode, DAC is powered down, volume is fixed to 0dB, the analog audio/video paths are
fixed to TV-VCR loop-through.
“0”: Normal operation.
After when the PDN pin is set to “H”, the AK4702 is in standby mode and muted. To exit the mute and enter standby mode,
set the MUTE bit to “0” and the STBY bit to “1”. To use the DAC or change analog switches, set the STBY bit to “0”. The
DAC will power up and the internal timing starts clocking LRCK “
↑
” after exiting reset and power down states by MCLK.
The AK4702 is in power-down mode until MCLK and LRCK are input.
Mode
PDN pin
MUTE
bit
STBY
bit
MCLK,
BICK,
LRCK
DAC
Analog
outputs
Register
control
0
Device power-down
“L”
*
*
Not Needed
Powered
Down
Powered
Down
GND
Not Available
1
Standby and mute
(default)
“H”
1
1
Not Needed
GND
Available
2
Standby
“H”
0
1
Not Needed
Powered
Down
fixed to
TV-VCR
loop-through
GND
Active
Available
3
4
Mute
“H”
“H”
1
0
0
0
Needed
Needed
Active
Active
Available
Available
Normal operation
Table 9. Power-down modes (audio)
Mode
PDN pin
STBY bit
Video outputs
TVFB,
TVSB
VCRSB
0
Power-down
“L”
*
Hi-z
Hi-z
Internally pulled down by
120kohm(typ) resister
1
Standby
“H”
1
Active
(Path is fixed)
Active
Active
Active
2
Normal operation
“H”
0
Active
Active
Table 10. Power-down modes (video)
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相關(guān)代理商/技術(shù)參數(shù) |
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| AK4702EQ | 制造商:AKM 制造商全稱:AKM 功能描述:2ch DAC with AV SCART switch |
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| AK4703 | 制造商:AKM 制造商全稱:AKM 功能描述:AV SCART switch |
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