[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.
PDN
pin
AUTO
bit
STBY
bit
MUTE
bit
DAPD
bit
Mode
Mode
0
1
“L”
*
*
*
*
Full Power-down
Auto Startup mode
(default)
“H”
1
*
*
*
2
3
“H”
“H”
0
0
1
1
1
0
*
*
Standby & mute
Standby
Mute
(DAC power down)
Mute
4
5
6
7
“H”
“H”
“H”
“H”
0
0
0
0
0
0
0
0
1
1
0
0
1
0
1
0
(DAC operation)
Normal operation
(DAC power down & Analog input)
Normal operation
(DAC operation)
(*: Don’t Care)
Table 1. Operation Mode Settings
Audio
Video Output
MCLK,
BICK,
LRCK
Register
Control
Audio Bias
Level
Video
Signal
TVFB,
TVSB
Mode
DAC
VCRSB
NOT
available
Power
down
Not
needed
Power
down
Pull-down
(2)
0
1
Full Power-down
Hi-Z
Hi-Z
Auto Startup mode
No video input
Available
Auto Startup mode
Video input (3)
Active
(4)
Active
Active
Active
Power
down
Active
Power
down
Active
(1)
Hi-Z/
Active
2
Standby & mute
3
4
5
Standby
Mute1
Mute2
Active
Needed
Normal operation
(DAC power down
& Analog input)
Normal operation
(DAC operation)
Power
down
Not
needed
6
7
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
MS0507-E-01
2010/09
- 20 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
