PCI4510 datasheet(49/220 Pages) TI

49 / 220 page

3−5

CRT

VGA

Controller

Audio

Codec

PCI4510

Zoomed Video

Port

PCM

Audio

Input

PCI Bus

PC Card

Interface

Video

Audio

PC Card

Motherboard

Speakers

Figure 3−3. Zoomed Video Implementation Using the PCI4510 Device

Not shown in Figure 3−3 is the multiplexing scheme used to route the socket ZV source to the graphics controller.

The PCI4510 device provides ZVSTAT and ZVSEL0 signals on the multifunction terminals to switch external bus

drivers. Figure 3−4 shows an implementation for switching between two ZV streams using external logic.

ZVSTAT

ZVSEL0

PCI4510

Figure 3−4. Zoomed Video Switching Application

Figure 3−4 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.

Also shown in Figure 3−4 is a second ZV input that can be provided from a source such as a high-speed serial bus

like IEEE 1394. The ZVSTAT signal provides a mechanism to switch the third ZV source. ZVSTAT is an active-high

output indicating that the PCI4510 socket is enabled for ZV mode. The implementation shown in Figure 3−4 can be

used if PC Card ZV is prioritized over other sources.

PCI4510 Datasheet(PDF) 49 Page - Texas Instruments