stmec001qtr STMicroelectronics, stmec001qtr Datasheet - Page 8

• Manufacturer Part Number: stmec001qtr
• Description: Power Interface Switch For Expresscardtm
• Manufacturer: STMicroelectronics

Pin configuration
3.2
Table 4.
3.3
8/18
3.3V
OFF
ON
ON
ON
ON
ON
AUX
Voltage inputs
Power states
The STMEC001 operates in a number of states, as described in the following table
Power states description
●
●
●
●
●
●
3.3V
States
ON
ON
ON
X
X
X
VIN_3.3V, VIN_3.3V
a card being inserted; power to the card will be based on the state of /CPUSB and /CPPE
(see table).
The card is present and VIN_1.5V or/and VIN_3.3V is removed from the input of the power
switch; VIN_3.3V
disabled (see table). If power to VIN_1.5V and VIN_3.3V is restored, output to the card will
be restored.
Prior to the insertion of a card, VIN_3.3V
available; no power will be made available to the card. If VIN_1.5V and VIN_3.3V are
made available at the input of the power switch after the card is inserted, both VO_3.3V
and VO_1.5Vout will be made available to the card.
VIN_3.3V
In "No Card" and "Shut Down" mode, discharge FETs are turned ON
When VIN_3.3V
1.5V
ON
ON
ON
X
X
X
AUX
NOT present; the STMEC001 is in completely OFF mode.
/SHDN
AUX
AUX
X
1
0
1
1
1
AUX
is NOT present, VIN_1.5V or/and VIN_3.3V must not be present.
will still be provided to the card, VIN_1.5 and VIN_3.3V will be
/CPUSB
and VIN_1.5V are present at the input of the power switch prior to
Logic
X
X
X
1
0
1
s
tates
/CPPE
X
X
0
X
1
1
AUX
/STBY
is available, VIN_3.3V and VIN_1.5V are not
X
X
X
1
1
0
3.3V
GND
GND
OFF
ON
ON
ON
AUX
Outputs
GND
GND
3.3V
OFF
OFF
ON
ON
GND
GND
1.5V
OFF
OFF
ON
ON
STMEC001
USB Enable
PE Enable
Shutdown
No Card
Standby
Mode
OFF