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AK4709 Datasheet(PDF) 16 Page - Asahi Kasei Microsystems

Part No. AK4709
Description  Low Power AV SCART Switch
Download  42 Pages
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Maker  AKM [Asahi Kasei Microsystems]
Homepage  http://www.akm.com
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AK4709 Datasheet(HTML) 16 Page - Asahi Kasei Microsystems

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[AK4709]
MS1319-
E-00
2011/07
- 16 -
Typical Operation Sequence (auto setup mode)
The Figure 2 shows an example of the system timing at auto startup mode.
Auto startup enable
PDN pin
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
Low Power Mode
AUTO bit
“1”(default)
Charge pump
Video Detect
50ms(MAX)
50ms(MAX)
125ms(MAX)
125ms(MAX)
Figure 2. Auto Startup Mode Sequence
Typical Operation Sequence (except auto setup mode)
Figure 3 shows an example of the system timing at normal operation mode.
PDN pin
STBY bit
“0”
“1”
“1” (default)
MUTE bit
“0”
“Stand-by“
“1”
“0”
“Mute”
TVOUTL/R
AMP
TV-Source
select
VCR in
VCR in
VCR in
VCR in
fixed to VCR in(Loop-through)
“1” (default)
AUTO bit
“0”
AMP
AMP
fixed to VCR in(Loop-through)
“1”
Charge pump
“Normal“
“Normal“
“Stand-by“
“Stand-by
&
“Stand-by
&
VCR in
VCR in
50ms(MAX) 50ms(MAX)
(Note26)
Video Detect
“1” (default)
Video Signal
Signal In
No Signal
No Signal
125ms(MAX)
Video Output
Hi-z
Active
Hi-z
(Note26)
50ms(MAX)
(GND)
50ms(MAX)
Note 26. Mute the analog outputs externally if click noise affects the system.
Figure 3. Typical Operating Sequence


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