Analog Devices ADV7181B Manual page 74

ADV7181B
Subaddress Register Bit Description
0x07 Autodetect E AD_PAL_EN. PAL B/G/I/H autodetect
nable enable.
AD_NTSC_EN. NTSC autodetect
enable.
AD_PALM_EN. PAL M autodetect
enable.
AD_PALN_EN. PAL N autodetect
enable.
AD_P60_EN. PAL60 autodetect
enable.
AD_N443_EN. NTSC443 autodetect
enable.
AD_SECAM_EN. SECAM autodetect
enable.
AD_SEC525_EN. SECAM 525
autodetect enable.
0x08 Contrast CON[7:0]. Contrast adjust. This is the
Register user control for contrast adjustment.
0x09 Reserved Reserved.
0x0A Brightness BRI[7:0]. This register controls the
Register brightness of the video signal.
0x0B Hue HUE[7:0]. This register contains the
Register value for the color hue adjustment.
0x0C Default DEF_VAL_EN. Default value enable.
Value Y
DEF_VAL_AUTO_EN. Default value.
DEF_Y[5:0]. Default value Y. This
register holds the Y default value.
0x0D Default DEF_C[7:0]. Default value C. The Cr
Value C and Cb default values are defined in
this register.
0x0E ADI Reserved.
Control
SUB_USR_EN. Enables the user to
access the Interrupt map.
Reserved.
Bits
7 6 5 4 3 2 1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1 0 0 0 0 0 0
1 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0
1
0 0 1 1 0 1
0 1 1 1 1 1 0
0 0 0 0
0
1
0 0
Rev. B | Page 74 of 100
0 Comments
0 Disable
1 Enable
Disable
Enable
Disable
Enable
Disable
Enable
Disable
Enable
Disable
Enable
Disable
Enable
Disable
Enable
0 Luma gain = 1
0
0
0
0 Free-run mode dependent
on DEF_VAL_AUTO_EN
1 Force free-run mode on
and output blue screen
Disable free-run mode
Enable automatic free-run
mode (blue screen)
Y[7:0] = {DEF_Y[5:0],0, 0}
0 Cr[7:0] = DEF_C[7:4],0, 0, 0, 0}
Cb[7:0] = DEF_C[3:0], 0, 0, 0, 0}
0 Set as default
Access user reg map
Access interrupt reg map
Set as default
Notes
0x00 Gain = 0;
0x80 Gain = 1;
0xFF Gain = 2.
0x00 = 0IRE;
0x7F = +100IRE;
0x80 = –100IRE.
Hue range =
–90° to +90°.
When lock is lost,
free-run mode can
be enabled to
output stable
timing, clock, and a
set color.
Default Y value
output in free-run
mode.
Default Cb/Cr value
output in free-run
mode. Default
values give blue
screen output.
See Figure 37.