AK4705 Datasheet, PDF (18/50 Pages) Asahi Kasei Microsystems – 2ch 24bit DAC with AV SCART Switch

[AK4705]
OPERATION OVERVIEW
1. System Reset and Power-down options
The AK4705 should be reset once by bringing PDN pin = “L” upon power-up. The AK4705 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
PDN
pin
L
H
H
H
H
H
6
H
7
H
AUTO
bit
x
1
0
0
0
0
STBY
bit
x
x
1
1
0
0
MUTE
bit
x
x
1
0
1
1
DAPD
bit
x
x
x
x
1
0
0
0
0
1
0
0
0
0
Table 1. Operation Mode Settings
Mode
Full Power-down
Auto Startup mode
(power-on default)
Standby & mute
Standby
Mute
(DAC power down)
Mute
(DAC operation)
Normal operation
(DAC power down
& Analog input)
Normal operation
(DAC operation)
x: Don’t Care
Mode
Register
Control
MCLK,
BICK,
LRCK
Audio Bias
Level
Video
Output
TVFB,
TVSB
VCRSB
0 Full Power-down
NOT
Not
available needed
Power
down
Hi-Z
Hi-Z
Pull-down
(2)
1
Auto Startup mode
(power-on default)
No video
input
Available
Video
input (3)
Active
Active
(4)
Active
Active
2
Standby & mute
Power
down
Hi-Z/
Active
3
Standby
Active
4
Mute
(DAC power down)
Power
down
5
Mute
(DAC operation)
Needed
Normal operation
6 (DAC power down
& Analog input)
Not
needed
Active
(1)
7
Normal operation
(DAC operation)
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.
Table 2. Status of each operation modes
MS0451-E-01
- 18 -
2007/06