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VT83C469 Datasheet(PDF) 11 Page - List of Unclassifed Manufacturers

Part # VT83C469
Description  PCMCIA Socket Controller
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Manufacturer  ETC [List of Unclassifed Manufacturers]
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VIA Technologies, Inc.
Preliminary VT83C469
11
Power Control Register ( Read/Write )
Address : Index ( Base + 02h )
BIT
FUNCTION
D7
Output Enable.
If this bit set to zero, the PC Card outputs listed below are tri-stated.
CADR<25:0>, D<15:0>, CE2#, CE1#, IORD#, IOWR#, OE#, WE#, REG#, RESET.
This bit should not be set until after this register has been written setting PC Card Power Enable
previously.
D6
Reserved.
D5
Auto Power Switch Enable.
0: automatic socket power switching based on card detects is disable.
1: automatic socket power switching based on card detects is enable.
D4
PC Card Power Enable.
0: power to the socket is disabled.
(Vcc and Vpp1 are all no connection)
1: power to the socket is enabled.
(Vcc is set according to bit 1 in Miscellaneous Control 1 register and DET_5 pin, and Vpp1 is
set according to bit 1:0 in this register)
D[3:2]
Reserved
D[1:0]
Vpp1 Power Control
00: no connection.
01: Vcc.
10: 12V.
11: reserved.(this setting then Vpp1 will be a no connection)
The following table describes the slot power control function.
OUTPUT
PC
CARD
POWER
ENABLE
AUTO
POWER
SWITCH
ENABLE
CD1#
CD2#
TRI-STATE
OUTPUTS
PC
CARD
POWER
ACTIVE
x0
x
x
x
OFF
0
01
0
0
0
OFF
1
11
0
0
0
ON
1
x1
0
x
1
OFF
1
x1
0
1
x
OFF
1
01
1
0
0
OFF
1
11
1
0
0
ON
1
x1
1
x
1
OFF
0
x1
1
1
x
OFF
0


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