Datasheet

AD9880
Rev. 0 | Page 32 of 64
Hex
Address
Read/Write
or Read Only
Bits
Default
Value
Register Name Description
01 = 4:3.
10 = 16:9.
[3:0]
Active Format Aspect
Ratio
R [3:0].
1000 = same as picture aspect ratio.
1001 = 4:3 (center).
1010 = 16:9 (center).
1011 = 14:9 (center).
0x83 Read [1:0]
Nonuniform Picture
Scaling
SC[1:0].
00 = no known non-uniform scaling.
01 = picture has been scaled horizontally.
10 = picture has been scaled vertically.
11 = picture has been scaled horizontally and vertically.
0x84 Read [6:0]
Video Identification
Code
VIC [6:0] video identification code—refer to CEA EDID short
video descriptors.
0x85 Read [3:0] Pixel Repeat
PR [3:0]—This specifies how many times a pixel has been
repeated.
0000 = no repetition—pixel sent once.
0001 = pixel sent twice (repeated once).
0010 = pixel sent 3 times.
1001 = pixel sent 10 times.
0xA—0xF reserved.
0x86 Read [7:0] Active Line Start LSB
This represents the line number of the end of the top horizontal
bar. If 0, there is no horizontal bar. Combines with Register 0x88
for a 16 bit value.
0x87 Read [6:0] New Data Flags
New data flags. These 8 bits are updated if any specific data
changes. Normal (no NDFs) is 0x00. When any NDF register is
read, all bits reset to 0x00. All NDF registers contain the same
data.
Bit Data Packet Changed
0 AVI Infoframe.
1 audio Infoframe.
2 SPD Infoframe.
3 MPEG source Infoframe.
4 ACP packets.
5 ISRC1 packets.
6 ISRC2 packets.
0x88 Read [7:0] Active Line Start MSB Active line start MSB (see Register 0x86).
0x89 Read [7:0] Active Line End LSB
This represents the line number of the beginning of a lower
horizontal bar. If greater than the number of active video lines,
there is no lower horizontal bar. Combines with Register 0x8A
for a 16-bit value.
0x8A Read [7:0] Active Line End MSB Active line end MSB. See Register 0x89.
0x8B Read [7:0] Active Pixel Start LSB
This represents the last pixel in a vertical pillar-bar at the left side
of the picture. If 0, there is no left bar. Combines with Register
0x8C for a 16-bit value.
0x8C Read [7:0] Active Pixel Start MSB Active pixel start MSB. See Register 0x8B.
0x8D Read [7:0] Active Pixel End LSB
This represents the first horizontal pixel in a vertical pillar-bar at
the right side of the picture. If greater than the maximum
number of horizontal pixels, there is no vertical bar. Combines
with Register 0x8E for a16-bit value.
0x8E Read [7:0] Active Pixel End MSB Active pixel end MSB. See Register 0x8D.
0x8F Read [6:0] New Data Flags New Data Flags (see 0x87).