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AD9381 Datasheet(PDF) 21 Page - Analog Devices |
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AD9381 Datasheet(HTML) 21 Page - Analog Devices |
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21 / 44 page  AD9381 Rev. 0 | Page 21 of 44 Hex Address Read/Write or Read Only Bits Default Value Register Name Description [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 nonuniform 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). |
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