Datasheet

3−5
PCI1510
(PC Card
Controller)
12 V
Power Supply
V
PP1
V
PP2
V
CC
V
CC
PC Card
TPS2211A
5 V
3.3 V
VCCD0
12V
5V
3.3V
AVPP
AVCC
Supervisor
SHDN
SHDN
VCCD1
VPPD0
VPPD1
Figure 3−3. TPS2211A Typical Application
3.5.3 Zoomed Video Support
The controller allows for the implementation of zoomed video (ZV) for PC Cards. Zoomed video is supported by
setting bit 6 (ZVENABLE) in the card control register (PCI offset 91h, see Section 4.32). Setting this bit puts 16-bit
PC Card address lines A25−A4 of the PC Card interface in the high-impedance state. These lines can then transfer
video and audio data directly to the appropriate controller. Card address lines A3−A0 can still access PC Card CIS
registers for PC Card configuration. Figure 3−4 illustrates a ZV implementation.
CRT
VGA
Controller
Audio
Codec
PCI1510
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 PCI1510 Controller
Not shown in Figure 3−4 is the multiplexing scheme used to route a socket ZV source to the graphics controller. The
controller 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.