Manual

MAX9670/MAX9671
Low-Power Audio/Video Switch with Audio
Volume Control for Dual SCART Connectors
36 ______________________________________________________________________________________
BIT
DESCRIPTION
76543210
COMMENTS
0 0 Shutdown
01
Standby mode (power-on default).
Input video detection circuits are
active. Audio circuitry is off unless
video is detected. Once slow switch
is detected, the signal paths between
the VCR and TV SCART are
connected.
10
Full-power mode with input video
detection and video-load detection
active.
Operating Mode
11
Full-power mode without input video
detection and video-load detection
active.
Table 19. Register 10H: Operating Modes
BIT
DESCRIPTION
76543210
COMMENTS
0 0 0 to 2V; internal source
01
4.5V to 7V; external source with 16:9
aspect ratio
1 0 Not used
TV Slow-Switching Input Status
11
9.5V to 12.6V; external source with
4:3 aspect ratio
0 0 0 to 2V; internal source
01
4.5V to 7V; external source with 16:9
aspect ratio
1 0 Not used
VCR Slow-Switching Input Status
11
9.5V to 12.6V; external source with
4:3 aspect ratio
0
V
VID
is too low for digital logic to
operate
1
V
VID
is high enough for digital logic to
operate
Power-On Reset
1
The temperature is below the thermal
shutdown limit
Table 20. Register 0EH: Status