MAX4397DA/SA
Audio/Video Switch for Dual SCART Connectors
______________________________________________________________________________________ 21
BIT
DESCRIPTION
76543210
COMMENTS
00
Low (< 2V), internal source (power-on default)
01
Medium (4.5V to 7V), external SCART source
with 16:9 aspect ratio
1 0 High impedance
Set TV Function Switching
11
High (> 9.5V), external SCART source with 4:3
aspect ratio
0
Normal operation, pulldown on TV_R/C_OUT
is off (power-on default)
TV_R/C_OUT Ground
1
Ground, pulldown on TV_R/C_OUT is on, the
output amplifier driving TV_R/C_OUT is turned
off
0 0 0V (power-on default)
0 1 Same level as ENC_FB_IN
1 0 Same level as VCR_FB_IN
Fast Blank (Fast Switching)
Composite video from the Y/C mixer is output
TV_Y/CVBS_OUT Switch
1
The TV_Y/CVBS_OUT signal selected in
register 06h is output (power-on default)
0
Composite video from the Y/C mixer is output
(power-on default)
RF_CVBS_OUT Switch
1
The TV_Y/CVBS_OUT signal selected in
register 06h is output
Table 8. Register 07h: TV Video Output Control
76543210
COMMENTS
VCR_Y/CVBS_OUT VCR_R/C_OUT
000
001
010
011
100
101
110
Mute Mute
Input Sources for VCR
Video
111
Mute (power-on default) Mute (power-on default)
0
DC restore clamp active at input (power-on default)
VCR_R/C_IN Clamp/Bias
1
Chrominance bias applied at input
0
DC restore clamp active at input (power-on default)
ENC_R/C_IN Clamp/Bias
1
Chrominance bias applied at input
Table 9. Register 08h: VCR Video Input Control
