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PCI7510 датащи(PDF) 49 Page - Texas Instruments |
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PCI7510 датащи(HTML) 49 Page - Texas Instruments |
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49 / 234 page ![]() 3–9 CRT VGA Controller Audio Codec PCI7510 19 4 Zoomed Video Port PCM Audio Input PCI Bus PC Card Interface Video Audio 19 4 PC Card Motherboard Speakers Figure 3–4. Zoomed Video Implementation Using the PCI7510 Device Not shown in Figure 3–4 is the multiplexing scheme used to route the socket ZV source to the graphics controller. The PCI7510 device provides ZVSTAT and ZVSEL0 signals on the multifunction terminals to switch external bus drivers. Figure 3–5 shows an implementation for switching between two ZV streams using external logic. ZVSTAT ZVSEL0 PCI7510 1 0 Figure 3–5. Zoomed Video Switching Application Figure 3–5 illustrates an implementation using standard three-state bus drivers with active-low output enables. ZVSEL0 is an active-low output indicating that the CardBus socket ZV mode is enabled. Table 3–5 illustrates the functionality of the ZV output signals. |
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