MIC2593-2YTQ Micrel Inc, MIC2593-2YTQ Datasheet - Page 19

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

Specifications of MIC2593-2YTQ

• 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: Lead free / RoHS Compliant
• Other names: 576-1100

Status Register, Slot B (STATB)
8-Bits, Read-Only
Power-Up Default Value:
Command_Byte Value (R/W):
The power-up default value is 00
overcurrent fault condition, writing a logical 1 back into the active (or set) bit position will clear the bit and de-assert /INT. The
status of the /FAULTB 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
VAUXBF
FAULTB
FAULTB
12MVBF
VAUXB
MAINB
12VBF
Bit(s)
5VBF
3VBF
D[7]
If FAULTB has been set by an overcurrent condition on one or more of the MAIN outputs, the ONB input must go LOW to reset FAULTB.
If FAULTB has been set by a VAUXB overcurrent event, the AUXENB input must go LOW to reset FAULTB.
If an overcurrent has occurred on both a MAIN output and the VAUX output of slot B, both ONB and AUXENB of the slot must go low to
reset FAULTB.
Neither the FAULTB bit nor the /FAULTB pin is active when the MIC2593 power paths are controlled by the System Management
Interface. When using SMI power path control, AUXENB and ONB pins for that slot must be tied to GND.
FAULT Status, Slot B
MAIN Enable Status, Slot B
VAUX Enable Status, Slot B
Overcurrent Fault: VAUXB supply B
Overcurrent Fault: –12V supply B
Overcurrent Fault: +12V supply B
Overcurrent Fault: 5V supply B
Overcurrent Fault: 3V supply B
read-only
MAINB
D[6]
0000 0000
0000 0101
h
. Both slots are disabled upon power-up, i.e., all supply outputs are off. In response to an
read-only
VAUXB
D[5]
Function
b
b
= 00
= 05
Status Register, Slot B (STATB)
h
h
read/write
VAUXBF
D[4]
19
read/write
12MVBF
D[3]
1 = /FAULTB pin asserted
(/FAULTB pin is LOW)
0 = /FAULTB pin de-asserted
(/FAULTB pin is HIGH)
See Notes 1 and 2
Represents the actual state (on/off) of the four Main
Power outputs for Slot B (+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 B
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
12VBF
D[2]
Operation
read/write
5VBF
D[1]
M9999-092208
read/write
MIC2593
3VBF
D[0]