[AK4711]
OPERATION OVERVIEW
1. System Reset and Power-down Options
The AK4711 should be reset once by bringing the PDN pin = “L” after all power supplies are supplied. The AK4711 has
several operation modes. The PDN pin and MUTE bit control operation mode as shown in Table 2 and Table 3.
■ System Reset and Full Power-down Mode
The AK4711 should be reset once by bringing the PDN pin = “L” after all power supplies are supplied.
PDN pin: Power down pin
L: Full Power-down Mode. Power-down, reset and initializes control registers.
H: Device active.
■ Mute Mode
When the MUTE bit = “1”, the audio outputs settle to VSS(0V, typ) and the charge pump circuit is in power down mode.
MUTE bit (00H D1): Audio output control
0: Normal operation.
1: All audio outputs to GND (default)
Mode
0
PDN pin
L
MUTE bit
x
Mode
Full Power-down
Mute (Note 19)
(AMP power down)
Normal operation
(AMP operation)
1
2
H
H
1
0
Note 19. TVOUTL/R are muted by Mute bit in the default state.
Table 2. Operation Mode Settings (x: Don’t Care)
Power
Consumption
(typ.) (Note 20)
Register
Control
Audio
Charge pump
Video
Output
Mode
TVFB
Hi-Z
TVSB
Pull
-down
(Note 21)
NOT
available
0
1
Full Power-down
0.6mW
Hi-Z
No Video
Input
Video
Input
No video
input
Video
input
1.86mW
228mW
1.86mW
250mW
Power down
Mute
(AMP power down)
Hi-Z/
Active
Available
Active
Active
Hi-Z
Normal operation
(AMP operation)
2
Hi-Z/
Active
Active
Note 20. 1kHz 2Vrms output with 4.5kΩ load at all audio output pins.
47.46 IRE at all video inputs corresponding to all video output pins with 150Ω load.
Note 21. Internally pulled down by 120kΩ (typ) resistor.
Table 3. Status of each operation modes
Rev. 0.4
2011/07
- 13 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
