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34
3.5
PC Card Applications
The PCI4510 device supports all the PC Card features and applications as described below.
Card insertion/removal and recognition per the
PC Card Standard
(release 8.0)
Zoomed video support
Speaker and audio applications
LED socket activity indicators
PC Card controller programming model
CardBus socket registers
3.5.1
PC Card Insertion/Removal and Recognition
The
PC Card Standard
(release 8.0) addresses the card-detection and recognition process through an interrogation
procedure that the socket must initiate on card insertion into a cold, nonpowered socket. Through this interrogation,
card voltage requirements and interface (16-bit versus CardBus) are determined.
The scheme uses the card-detect and voltage-sense signals. The configuration of these four terminals identifies the
card type and voltage requirements of the PC Card interface. The encoding scheme is defined in the
PC Card
Standard
(release 8.0) and in Table 32.
Table 32. PC Card Card-Detect and Voltage-Sense Connections
CD2//CCD2
Ground
CD1//CCD1
Ground
VS2//CVS2
Open
VS1//CVS1
Open
KEY
5 V
INTERFACE
16-bit PC Card
VCC
5 V
VPP/VCORE
Per CIS (VPP)
Per CIS (VPP)
Ground
Ground
Open
Ground
5 V
16-bit PC Card
5 V and 3.3 V
Ground
Ground
Ground
Ground
5 V
16-bit PC Card
5 V, 3.3 V, and
X.X V
Per CIS (VPP)
Ground
Ground
Open
Ground
LV
16-bit PC Card
3.3 V
Per CIS (VPP)
Ground
Connect to
CVS1
Open
Connect to
CCD1
LV
CardBus PC Card
3.3 V
Per CIS (VPP)
Ground
Ground
Ground
Ground
LV
16-bit PC Card
3.3 V and X.X V
Per CIS (VPP)
Connect to
CVS2
Ground
Connect to
CCD2
Ground
LV
CardBus PC Card
3.3 V and X.X V
Per CIS (VPP)
Connect to
CVS1
Ground
Ground
Connect to
CCD2
LV
CardBus PC Card
3.3 V, X.X V,
and Y.Y V
Per CIS (VPP)
Ground
Ground
Ground
Open
LV
16-bit PC Card
X.X V
Per CIS (VPP)
Connect to
CVS2
Ground
Connect to
CCD2
Open
LV
CardBus PC Card
3.3 V
1.8 V (VCORE)
Ground
Connect to
CVS2
Connect to
CCD1
Open
LV
CardBus PC Card
X.X V and Y.Y V
Per CIS (VPP)
Connect to
CVS1
Ground
Open
Connect to
CCD2
LV
CardBus PC Card
Y.Y V
Per CIS (VPP)
Ground
Connect to
CVS1
Ground
Connect to
CCD1
Reserved
Ground
Connect to
CVS2
Connect to
CCD1
Ground
Reserved
This hardware voltage selection setting cannot be overridden by CIS configuration settings.
3.5.2
Zoomed Video Support
The PCI4510 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 4.36) on a per-socket function basis.
Setting this bit puts 16-bit PC Card address lines A25A4 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 A3A0 can still
access PC Card CIS registers for PC Card configuration. Figure 33 illustrates a PCI4510 ZV implementation.