AK4707 Datasheet, PDF (16/42 Pages) Asahi Kasei Microsystems – AV SCART Switch

ASAHI KASEI
[AK4707]
OPERATION OVERVIEW
1. System Reset and Power-down options
The AK4707 should be reset once by bringing PDN pin = “L” upon power-up. The AK4707 has several operation modes.
The PDN pin, AUTO bit, BIAS bit, STBY bit and AMP bit control operation modes as shown in Table 1 and Table 2.
Mode
0
1
2
3
4
5
PDN pin AUTO bit STBY bit BIAS bit
Mode
“L”
*
*
*
Full Power-down
“H”
1
*
*
Auto Startup mode
(Power-on default)
“H”
0
1
1
Standby & Mute
“H”
0
1
0
Standby
“H”
0
0
1
Mute
(AMP power down)
“H”
0
0
0
Normal operation
(AMP operation)
Table 1. Operation Mode Settings (*: Don’t Care)
Mode
0 Full Power-down
No video
1
Auto Startup mode
(Power-on default)
input
Video
input (2)
2 Standby & Mute
3 Standby
4
Mute
(AMP power down)
5
Normal operation
(AMP operation)
Register
Control
Not
available
Audio Bias
Level
Power down
Video
Output
Hi-Z
TVFB,
TVSB
Hi-Z
Available
Active
Power
down
Active
Power
down
Active (3)
Active
Hi-Z / Active
Active
VCRSB
Pull-down (1)
Active
Note 15. Internally pulled down by 120kΩ (typ) resistor.
Note 16. Video input to TVVIN or VCRVIN.
Note 17. TVOUTL/R are muted by Mute bit in the default state.
Table 2. Status of each operation modes
MS0551-E-00
- 16 -
2006/10