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Table 3−2. PC Card—Card Detect and Voltage Sense Connections
CD2//CCD2 CD1//CCD1 VS2//CVS2 VS1//CVS1 Key Interface V
CC
V
PP
/V
CORE
Ground Ground Open Open 5 V 16-bit PC Card 5 V Per CIS (V
PP
)
Ground Ground Open Ground 5 V 16-bit PC Card 5 V and 3.3 V Per CIS (V
PP
)
Ground Ground Ground Ground 5 V 16-bit PC Card
5 V, 3.3 V, and
X.X V
Per CIS (V
PP
)
Ground Ground Open Ground LV 16-bit PC Card 3.3 V Per CIS (V
PP
)
Ground
Connect to
CVS1
Open
Connect to
CCD1
LV CardBus PC Card 3.3 V Per CIS (V
PP
)
Ground Ground Ground Ground LV 16-bit PC Card 3.3 V and X.X V Per CIS (V
PP
)
Connect to
CVS2
Ground
Connect to
CCD2
Ground LV CardBus PC Card 3.3 V and X.X V Per CIS (V
PP
)
Connect to
CVS1
Ground Ground
Connect to
CCD2
LV CardBus PC Card
3.3 V, X.X V,
and Y.Y V
Per CIS (V
PP
)
Ground Ground Ground Open LV 16-bit PC Card X.X V Per CIS (V
PP
)
Connect to
CVS2
Ground
Connect to
CCD2
Open LV CardBus PC Card 3.3 V 1.8 V (V
CORE
)
Ground
Connect to
CVS2
Connect to
CCD1
Open LV CardBus PC Card X.X V and Y.Y V Per CIS (V
PP
)
Connect to
CVS1
Ground Open
Connect to
CCD2
LV CardBus PC Card Y.Y V Per CIS (V
PP
)
Ground
Connect to
CVS1
Ground
Connect to
CCD1
LV UltraMedia Per query terminals
Ground
Connect to
CVS2
Connect to
CCD1
Ground Reserved Reserved
3.5.4 Flash Media Card Detection
The PCI7x21/PCI7x11 controller detects an MMC/SD card insertion through the MC_CD_0 terminal. When this
terminal is 0, an MMC/SD card is inserted in the socket. The PCI7x21/PCI7x11 controller debounces the MC_CD_0
signal such that instability of the signal does not cause false card insertions. The debounce time is approximately 50
ms. The MC_CD_0
signal is not debounced on card removals. The filtered MC_CD_0 signal is used in the MMC/SD
card detection and power control logic.
The MMC/SD card detection and power control logic contains three main states:
• Socket empty, power off
• Card inserted, power off
• Card inserted, power on
The PCI7x21/PCI7x11 controller detects a Memory Stick card insertion through the MC_CD_1
terminal. When this
terminal is 0, a Memory Stick card is inserted in the socket. The PCI7x21/PCI7x11 controller debounces the
MC_CD_1
signal such that instability of the signal does not cause false card insertions. The debounce time is
approximately 50 ms. The MC_CD_1
signal is not debounced on card removals. The filtered MC_CD_1 signal is used
in the Memory Stick card detection and power control logic.
The Memory Stick card detection and power control logic contains three main states:
• Socket empty, power off
• Card inserted, power off
• Card inserted, power on