MIC2593-2BTQ Micrel Inc, MIC2593-2BTQ Datasheet - Page 18

• Manufacturer Part Number: MIC2593-2BTQ
• Description: IC CTRLR HOTPLUG PCI DUAL 48TQFP
• Manufacturer: Micrel Inc
• Type: Hot-Swap Controllerr

Specifications of MIC2593-2BTQ

• Applications: PCI, PCI-X
• Internal Switch(s): No
• Voltage - Supply: 3.3V, 5V, ±12V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Status Register, Slot A (STATA)
8-Bits, Read-Only
Power-Up Default Value:
Command_Byte Value (R/W):
The power-up default value is 00
anovercurrent fault condition, writing a logical 1 back into the active (or set) bit position will clear the bit and de-assert /INT.
Thestatus of the /FAULTA pin is not affected by reading the Status Register or by clearing active status bits.
Note 1.
Note 2.
Micrel, Inc.
September 2008
read-only
VAUXAF
FAULTA
FAULTA
12MVAF
VAUXA
MAINA
12VAF
Bit(s)
5VAF
3VAF
D[7]
If FAULTA has been set by an overcurrent condition on one or more of the MAIN outputs, the ONA input must go LOW to reset FAULTA.
If FAULTA has been set by a VAUXA overcurrent event, the AUXENA input must go LOW to reset FAULTA.
If an overcurrent has occurred on both a MAIN output and the VAUX output of slot A, both ONA and AUXENA of the slot must go low to
reset FAULTA.
Neither the FAULTA bit nor the /FAULTA pin is active when the MIC2593 power paths are controlled by the System Management
Interface. When using SMI power path control, AUXENA and ONA pins for that slot must be tied to GND.
FAULT Status, Slot A
MAIN Enable Status, Slot A
VAUX Enable Status, Slot A
Overcurrent Fault: VAUXA supply A
Overcurrent Fault: –12V supply A
Overcurrent Fault: +12V supply A
Overcurrent Fault: 5V supply A
Overcurrent Fault: 3V supply A
read-only
MAINA
D[6]
0000 0000
0000 0100
h
read-only
. Both slots are disabled upon power-up, i.e., all supply outputs are off. In response to
VAUXA
D[5]
Function
b
b
= 00
= 04
Status Register, Slot A (STATA)
h
h
read/write
VAUXAF
D[4]
18
read/write
12MVAF
D[3]
1 = /FAULTA pin asserted
(/FAULTA pin is LOW)
0 = /FAULTA pin de-asserted
(/FAULTA pin is HIGH)
See Notes 1 and 2
Represents the actual state (on/off) of the four Main
Power outputs for Slot A (+12V, –12V, +5V and +3.3V)
1 = Main Power ON
0 = Main Power OFF
Represents the actual state (on/off) of the Auxiliary
Power output for Slot A
1 = AUX Power ON
0 = Main Power OFF
1 = Fault, 0 = No fault
1 = Fault, 0 = No fault
1 = Fault, 0 = No fault
1 = Fault, 0 = No fault
1 = Fault, 0 = No fault
read/write
12VAF
D[2]
Operation
read/write
5VAF
D[1]
M9999-092208
read/write
MIC2593
3VAF
D[0]