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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ADV7152LS110 датащи(PDF) 27 Page - Analog Devices |
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ADV7152LS110 датащи(HTML) 27 Page - Analog Devices |
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27 / 32 page  ADV7152 –27– REV. B APPENDIX 4 MULTIPLE PALETTE APPLICATIONS Palette Priority Select Inputs The palette priority selection inputs allow up to four separate palette devices to be used in a single system to drive a single monitor. The IOR, IOG and IOB analog video output signals of each device are connected together, as shown. Signal inputs (PS0, PS1) determine on a pixel by pixel basis which palette device drives the monitor. This allows for implementation of multiple windows applications with each device acting as an independent palette. During initialization, each device is as- signed two match bits, MR16 (PS0) and MR17 (PS1) in Mode Register MR1. PS0 and PS1 inputs will select one of the prepro- grammed devices at any instant when PS0, PS1 matches MR16, MR17, respectively. When PS0 and PS1 do not match these bits, the DACs of the particular device are shut down, driving RGB outputs to 0 mA. PS0 and PS1 are multiplexed similar to the pixel data, thus allowing for subpixel resolution. The dia- grams show an example of one ADV7152 operating in conjunc- tion with three ADV7151’s (Pseudo-Color RAM-DACs). Each displayed window on the monitor is driven by one of the four devices. Each device’s analog output signals are connected to- gether as shown. Note: Only one palette device is selected at any particular instant. The analog output levels of the unselected devices will be 0 mA. Other applications for the palette priority function using a mini- mum of two devices (two ADV7152s or one ADV7152 and one ADV7151) include: Cursor Overlay on 24-Bit Graphics Active Live Video Overlay (from Frame Grabber) Text/Character Generation and Overlay Z S = 75Ω DACs Z O =75Ω Z L = 75Ω (CABLE) (MONITOR) (SOURCE TERMINATION) DACs IOR, IOG, IOB (DEVICE: 2) (DEVICE: 1) IOR, IOG, IOB Multiple Devices Termination for a Single Monitor ADV7152 ADV7151 (1) 256 x 30 RAM 256 x 30 PALETTE PALETTE SELECT BITS RGB ANALOG VIDEO RGB ANALOG VIDEO VIDEO TO MONITOR PS0, PS1 256 x 30 PALETTE RGB ANALOG VIDEO RGB ANALOG VIDEO ADV7151 (2) ADV7151 (3) R0–R7 G0–G7 B0–B7 WINDOW 1 (Pseudo-Color) PS0 = 0: PS1 = 1 WINDOW 3 (Pseudo-Color) PS0 = 1: PS1 = 1 MONITOR WINDOW 2 (Pseudo-Color) PS0 = 1: PS1 = 0 TRUE-COLOR BACKGROUND PS0 = 0: PS1 = 0 MR16 MR17 0 0 PALETTE SELECT BITS MR16 MR17 0 1 PALETTE SELECT BITS MR16 MR17 1 0 PALETTE SELECT BITS MR16 MR17 1 1 256 x 30 PALETTE P0–P7 Multiple Devices Driving a Multiwindow Application |
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