adv7718 Analog Devices, Inc., adv7718 Datasheet - Page 27
![no-image](/images/no-image-200.jpg)
adv7718
Manufacturer Part Number
adv7718
Description
Integrated Digital Ccir-601 Pal/ntsc Video Encoder
Manufacturer
Analog Devices, Inc.
Datasheet
1.ADV7718.pdf
(40 pages)
- Current page: 27 of 40
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OSD Enable (MR35)
A logic one in MR35 will enable the OSD function on the
ADV7177.
Input Default Color (MR36)
This bit determines the default output color from the DACs for
zero input data (or disconnected). A Logical “0” means that
the color corresponding to 00000000 will be displayed. A
Logical “1” forces the output color to black for 00000000
input video data.
REG 11
REG 0
REG 1
REG 2
OSD
OSD
OSD
OSD
BE WRITTEN TO
ZERO SHOULD
THIS BIT
MR37
MR37
INPUT DEFAULT COLOR
MR36
0
1
INPUT COLOR
BLACK
MR36
MR35
0
1
OSD ENABLE
Cr7
Cr1
MR35
Cb0
DISABLE
ENABLE
Y0
BE WRITTEN TO
ZERO SHOULD
THIS BIT
MR34
MR34
MR33-32
0
0
1
1
Reserved (MR37)
Zero should be written to this bit.
OSD REGISTER 0–11
(Address [SR4–SR0] = 13H–1EH)
There are 12 OSD registers as shown in Figure 35. There are
four bits for each Y, Cb and Cr value, there are four zero added
to give the complete byte for each value loaded internally.
(Y0 = [Y0
Cb
0
1
0
1
MR33
CLOCK OUTPUT
0
, 0, 0, 0, 0,], Cr = [Cr
CLOCK OUTPUT OFF
13.5MHz OUTPUT
27MHz OUTPUT
CLOCK OUTPUT OFF
3
MR32
, Y0
MR31
VBI PASSTHROUGH
2
0
1
, Y0
Cb7
Cb1
MR31
Y1
1
DISABLE
ENABLE
, Y0
Cr0
0
3
, 0, 0, 0, 0], Cb = [Cb
(READ ONLY)
, Cr
REV CODE
MR30
MR30
ADV7177/ADV7178
2
, Cr
1
, Cr
0
, 0, 0, 0, 0].)
3
, Cb
2
, Cb
1
,
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