AK4705 Datasheet, PDF (20/50 Pages) Asahi Kasei Microsystems – 2ch 24bit DAC with AV SCART Switch

[AK4705]
■ Normal Operation Mode
To use the DAC or change analog switches, set the AUTO bit, DAPD bit, MUTE bit and STBY bit to “0”. The DAC is in
power-down mode until MCLK and LRCK are input. The AK4705 is in power-down mode until MCLK and LRCK are
input. Figure 2 shows an example of the system timing at the power-down and power-up by PDN pin.
■ Typical Operation Sequence (auto setup mode)
Figure 2 shows an example of the system timing for the auto setup mode.
PDN pin
Clock, Data in
Low Power Mode
Low Power Mode
don’t care
Low Power Mode
TVVIN
don’t care No Signal
Signal in
No Signal
Signal in
No Signal
don’t care
VCRVIN
don’t care
No Signal
Signal in
No Signal don’t care
TVVOUT,
Hi-Z
Active (loop-through)
Hi-Z
Active (loop-through)
Hi-Z
VCRVOUT
Audio out (DC)
(GND)
Active (loop-through)
Active (loop-through)
Figure 2. Typical operating sequence (auto setup mode)
„ Typical Operation Sequence (except auto setup mode)
Figure 3 shows an example of the system timing except for the auto setup mode.
PDN pin
AUTO bit
MUTE bit
STBY bit
“1” (default)
“1” (default)
“1” (default)
“Stand-by“
“0”
“Mute”
“0”
“1”
“0”
“Stand-by“
“0”
“1”
“1”
Clock in
Data in
D/A Out
(internal)
TV-Source
select
TV out
MS0451-E-01
don’t care (2)
don’t care
normal operation
“0”
Audio data
GD (1)
fixed to VCR in(Loop-through)
VCR in
(default)
DAC
(4)
offset calibration
VCR in
(3)
- 20 -
don’t care (2)
“0”
don’t care
GD (1)
VCR in
VCR in
2007/06