AK4710 Datasheet, PDF (12/31 Pages) Asahi Kasei Microsystems – Low Power Single SCART Driver

[AK4710]
OPERATION OVERVIEW
1. System Reset and Power-down Options
The AK4710 should be reset once by bringing the PDN pin = “L” after all power supplies are supplied. The AK4710 has
several operation modes. The PDN pin and MUTE bit, control operation mode as shown in Table 2and Table 3.
■ System Reset and Full Power-down Mode
The AK4710 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 PDN pin MUTE bit
Mode
0
L
x
Full Power-down
1
H
1
Mute (Note 19)
(AMP power down)
2
H
0
Normal operation
(AMP operation)
Note 19. TVOUTL/R are muted by Mute bit in the default state.
Table 2. Operation Mode Settings (x: Don’t Care)
Mode
Register
Audio
Control Charge pump
Video
Output
TVFB TVSB
0 Full Power-down
NOT
available
Pull
Hi-Z -down
Hi-Z
(Note 21)
1
Mute
(AMP power down)
2
Normal operation
(AMP operation)
No Video
Input
Video
Input
No video
input
Video
input
Available
Power down
Active
Hi-Z/
Active
Hi-Z
Hi-Z/
Active
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.
Power
Consumption
(typ.) (Note 20)
0.6mW
1.86mW
228mW
1.86mW
250mW
Table 3. Status of Each Operation Modes
Rev. 0.3
- 12 -
2011/07