參數(shù)資料
型號(hào)： AK4708
廠商： Asahi Kasei Microsystems Co.,Ltd
英文描述： AV SCART Switch with Two RGB Outputs
中文描述： 影音SCART開關(guān)與兩個(gè)RGB輸出
文件頁數(shù)： 18/46頁
文件大小： 504K
代理商： AK4708
[AK4708]
MS0618-E-00
2007/04
- 18 -
■
Normal Operation Mode
To change analog switches, set the AUTO bit, BIAS bit and STBY bit to “0”. The AK4708 is in power-down mode until
PDN pin = “H”. The Figure 4 shows an example of the system timing at the power-down and power-up by PDN pin.
■
Typical Operation Sequence (auto setup mode)
The Figure 4 shows an example of the system timing at auto startup mode.
Auto startup enable
PDN pin
Low Power Mode
Audio out (DC)
TVVOUT,
VCRVOUT
Active (loop-through)
TVVIN
Signal in
No Signal
don’t care
Signal in
No Signal
don’t care
VCRVIN
Signal in
No Signal
don’t care
don’t care
Active (loop-through)
Hi-Z
Hi-Z
Active (loop-through)
(GND)
Active (loop-through)
No Signal
No Signal
Hi-Z
Low Power Mode
Low Power Mode
AUTO bit
“1”(defaoult)
Figure 4.Auto startup mode sequence
■
Typical Operation Sequence (except auto setup mode)
Figure 5 shows an example of the system timing at normal operation mode.
PDN pin
“1” (default)
STBY bit
“0”
“1”
“1” (default)
BIAS bit
“0”
“Stand-by“
“1”
“0”
“Stand-by“
“Mute”
TV out
AMP
TV-Source
select
VCR in
VCR in
VCR in
(Note 21)
VCR in
fixed to VCR in(Loop-through)
(default)
“1” (default)
AUTO bit
“0”
AMP
AMP
fixed to VCR in(Loop-through)
“1”
(Note 22)
Note 21. Set the STBY bit = “0” to pass for 20.2ms after set the VMUTE bit = “0”, to prevent the click noise.
Note 22. Mute the analog outputs externally if click noise affects the system.
Figure 5. Typical operating sequence
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