AK4706 Datasheet, PDF (20/53 Pages) Asahi Kasei Microsystems – 2ch 24bit DAC with AV Switch & HD/SD Video Filter

ASAHI KASEI
[AK4706]
OPERATION OVERVIEW
1. System Reset and Power-down options
The AK4706 should be reset once by bringing PDN pin = “L” upon power-up. The AK4706 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.
Mode
0
1
2
3
4
5
6
7
PDN
pin
“L”
“H”
“H”
“H”
“H”
“H”
“H”
“H”
AUTO
bit
*
1
0
0
0
0
0
0
STBY
bit
MUTE
bit
DAPD
bit
Mode
*
*
*
Full Power-down
*
*
*
Auto Startup mode
(default)
1
1
*
Standby & mute
1
0
*
Standby
0
1
1
Mute
(DAC power down)
0
1
0
Mute
(DAC operation)
0
0
1
Normal operation
(DAC power down & Analog input)
0
0
0
Normal operation
(DAC operation)
*: Don’t Care
Table 1. Operation Mode Settings
Audio
Mode
Register
Control
DAC
MCLK,
BICK,
LRCK
Audio Bias
Level
0
Full Power-down
NOT
Power
available down
Not
needed
Power
down
1
Auto Startup mode
No video input
Available
Auto Startup mode
Video input (3)
Active
2
Standby & mute
Power
down
3
Standby
Active
4
Mute1
Power
5
Mute2
Active Needed
down
Normal operation
6 (DAC power down
& Analog input)
Power
down
Not
needed
Active
(1)
7
Normal operation
(DAC operation)
Active Needed
Notes:
(1) TVOUTL/R are muted by VMUTE bit in the default state.
(2) Internally pulled down by 120kohm(typ) resistor.
(3) Video input to TVVIN or VCRVIN.
(4) VCRC outputs 0V for termination.
HD Video output does not work. (Hi-Z default)
Table 2. Status of each operation modes
Video Output
Video
Signal
TVFB,
TVSB
VCRSB
Hi-Z
Hi-Z
Pull-down
(2)
Active
(4)
Hi-Z/
Active
Active
Active
MS0507-E-00
- 20 -
2006/05