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SPD6722QCCE Datasheet(PDF) 50 Page - Intel Corporation

Part No. SPD6722QCCE
Description  ISA-to-PC-Card (PCMCIA) Controllers
Download  138 Pages
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Maker  INTEL [Intel Corporation]
Homepage  http://www.intel.com
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SPD6722QCCE Datasheet(HTML) 50 Page - Intel Corporation

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PD6710/’22 — ISA-to-PC-Card (PCMCIA) Controllers
50
Datasheet
Bits 1:0 — VPP1 Power
These bits are intended to be used to control the power to the VPP1 pin of the PC Card.
Bit 4 — VCC Power
Depending on the value of bit 5 below, setting this bit to ‘1’ will cause power to be applied to the
card. The VCC 3.3V bit (see bit 1, “Misc Control 1” on page 70) determines whether 3.3V or 5V
power is applied.
Bit 5 — Auto-Power
When this bit is set to ‘1’, the PD67XX causes power to the card to be turned on and off
automatically with the insertion and removal of a PC card from the socket.
Bit 7 — Card Enable
When this bit is ‘1’, the outputs to the PC Card are enabled if a card is present and card power is
being supplied. The pins affected include: -CE2, -CE1, -IORD, -IOWR, -OE, -REG, RESET,
A[25:0], D[15:0], and -WE (see Table 2).
VPP1 Power
Bit 1
Bit 0
VPP_PGM
VPP_VCC
PC Card Intended Socket Function
0
0
Inactive low
Inactive low
Zero volts to PC Card socket VPP1 pin
0
1
Inactive low
Active high1
Selected card VCC to PC Card socket VPP1
pin
1
0
Active high a
Inactive low
+12V to PC Card socket VPP1 pin
1
1
Inactive low
Inactive low
Zero volts to PC Card socket VPP1 pin
1. Under conditions where VPP1 power is activated. See “Power Control” on page 48.
0
Power is not applied to the card: the -VCC_3 and -VCC_5 socket power control pins are
inactive high.
1
Power is applied to the card: if bit 5 is ‘0’, or bit 5 is ‘1’ and -CD2 and -CD1 are active low,
then the selected -VCC_3 or -VCC_5 socket power control pin is active low.
0
VCC and VPP1 power control signals are activated independent of the socket’s -CD2 and -
CD1 input levels.
1
VCC and VPP1 power control signals are only activated if the socket’s -CD2 and -CD1 inputs
are active low.
0
Outputs to card socket are not enabled and are floating.
1
Outputs to card socket are enabled if -CD1 and -CD2 are active low and bit 4 is ‘1’.


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