Table 11. data format for read mode, Table 12. register 00h: audio control, Table 13. register 01h: tv audio – Rainbow Electronics MAX9671 User Manual
Page 32
MAX9670/MAX9671
Low-Power Audio/Video Switch with Audio
Volume Control for Dual SCART Connectors
32
______________________________________________________________________________________
REGISTER
ADDRESS (hex)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
0Eh
Not used
Power-on
reset
Not used
VCR slow-switch input
status
TV slow switch input
status
0Fh
Not used
ENC_Y_IN
input video
detection
ENC_Y/
CVBS_IN
input video
detection
VCR CVBS
output load
VCR CVBS
input video
detection
TV CVBS
output load
TV CVBS
input video
detection
Table 11. Data Format for Read Mode
BIT
DESCRIPTION
7
6
5
4
3
2
1
0
COMMENTS
0
Off
TV Audio Mute
1
On (power-on default)
0
0
0
0
0
0dB gain (power-on default)
0
0
0
0
1
-2dB gain
0
0
0
1
0
-4dB gain
0
0
0
1
1
-6dB gain
0
0
1
0
0
-8dB gain
0
0
1
0
1
-10dB gain
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
1
1
1
1
0
-60dB gain
TV Volume Control
1
1
1
1
1
-62dB gain
0
Off
TV Zero-Crossing Detector
1
On (power-on default)
Table 12. Register 00H: Audio Control
BIT
DESCRIPTION
7
6
5
4
3
2
1
0
COMMENTS
0
0
Encoder audio
0
1
VCR audio
1
0
TV audio (MAX9671 only)
Input Source for TV Audio
1
1
Mute (power-on default)
0
0
Encoder audio
0
1
VCR audio
1
0
TV audio (MAX9671 only)
Input Source for VCR Audio
1
1
Mute (power-on default)
0
Disabled (power-on default)
Interrupt Enable
1
Enabled
Table 13. Register 01H: TV Audio