MIC2590B-5BTQ Micrel Inc, MIC2590B-5BTQ Datasheet - Page 16

• Manufacturer Part Number: MIC2590B-5BTQ
• Description: IC PCI HOT PLUG CTLR DUAL 48TQFP
• Manufacturer: Micrel Inc
• Type: Hot-Swap Controllerr

Specifications of MIC2590B-5BTQ

• 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

Power-Up Default Value:
Read Command Byte (R/W): 0000 0100
The power-up default value is 00h. The slot is disabled
upon power-up, i.e., all supply outputs are off. In response
to an 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 /FAULTA pin is not affected
by reading the Status Register.
Note 1.
Note 2.
read-only
FAULTA
Micrel, Inc.
D[7]
September 2008
VAUXFA
FALUTA
12MVFA
VAUXA
MAINA
12VFA
Bit(s)
5VFA
3VFA
Status Register, Slot A (STATA), 8-Bits Read Only
read-only
D[6]
MAINA
1 = /FAULT[A/B] pin asserted, indicating a fault condition (/FAULT is LOW).
0 = /FAULT[A/B] pin is de-asserted (/FAULT is HIGH).
If FAULT[A/B] has been set by an overcurrent condition on one (or more) of the main outputs, the corresponding ON[A/B] must go LOW
to reset FAULT. If FAULT[A/B] has been set by an overcurrent on a VAUX output, the corresponding AUXEN[A/B] must go LOW to reset
FAULT. If an overcurrent has occurred on both a main output and VAUX output of a slot, both ON[A/B] and AUXEN[A/B] of the
corresponding slot must go LOW to reset FAULT.
The FAULT bits, and the /FAULT pins, are not active when the MIC2590B power paths are controlled by the System Management
Interface (SMBus). When using SMI power path control for a slot, the AUXEN and ON pins for that slot must be tied to ground.
FAULT Pin Status, Slot
A
MAIN Enable Status,
Slot A
VAUX Enable Status,
Slot A
Overcurrent Fault
VAUX Supply
Overcurrent Fault
-12V Supply
Overcurrent Fault
12V Supply
Overcurrent Fault
5V Supply
Overcurrent Fault
3V Supply
read-only
VAUXA
D[5]
Function
VAUXAF
D[4]
read-
write
0000 0000
12MVAF
D[3]
read-
write
Notes 1 & 2
Represents actual
state (on/off) of the
four main power
outputs for Slot A.
(+12V, +5V, +3.3V
and -12V)
1 = MAIN Power On
0 = MAIN Power Off
Represents actual
state (on/off) of the
auxiliary power
outputs for Slot A.
1 = MAIN 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
D[2]
12VAF
read-
write
b
b
Operation
= 00
= 04
D[1]
read-
5VAF
write
h
h
D[0]
3VAF
read-
write
16
Power-Up Default Value:
Read Command Byte (R/W): 0000 0101
The power-up default value is 00h. The slot is disabled
upon power-up, i.e., all supply outputs are off. In response
to an 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.
read-only
FAULTB
D[7]
VAUXFB
FALUTB
12MVFB
VAUXB
MAINB
12VFB
Bit(s)
5VFB
3VFB
Status Register, Slot B (STATB), 8-Bits Read Only
read-only
D[6]
MAINB
FAULT Pin Status, Slot
B
MAIN Enable Status,
Slot B
VAUX Enable Status,
Slot B
Overcurrent Fault
VAUX Supply
Overcurrent Fault
-12V Supply
Overcurrent Fault
12V Supply
Overcurrent Fault
5V Supply
Overcurrent Fault
3V Supply
read-only
D[5]
VAUXB
Function
VAUXBF
D[4]
read-
write
0000 0000
12MVBF
D[3]
read-
write
Notes 1 & 2
Represents actual
state (on/off) of the
four main power
outputs for Slot B.
(+12V, +5V, +3.3V
and -12V)
1 = MAIN Power On
0 = MAIN Power Off
Represents actual
state (on/off) of the
auxiliary power
outputs for Slot B.
1 = MAIN 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
D[2]
12VBF
read-
write
b
b
Operation
M9999-091808
= 00
= 05
MIC2590B
D[1]
5VBF
read-
write
h
h
D[0]
3VBF
read-
write