參數(shù)資料
型號(hào)： MIC2591B-5YTQ
廠商： MICREL INC
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQFP48
封裝： LEAD FREE, TQFP-48
文件頁(yè)數(shù)： 20/34頁(yè)
文件大?。?/td> 1920K
代理商： MIC2591B-5YTQ
MIC2591B
Micrel
March 2005
27
M9999-033105
Status Register Slot A (STATA)
8-Bits, Read-Only
Status Register, Slot A (STATA)
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
read-only
read/write
read-only
read/write
read-only
read/write
FAULTA
MAINA
VAUXA
VAUXAF
Reserved
12VAF
Reserved
3VAF
Bit(s)
Function
Operation
FAULTA
FAULT Status - Slot A
1 = Fault pin asserted
(/FAULTA pin is LOW)
0 = Fault pin deasserted
(/FAULTA pin is HIGH)
See Notes 1, 2, and 3.
MAINA
MAIN Enable Status - Slot A
Represents the actual state (on/off) of the
two Main Power outputs for Slot A
(+12V and +3.3V)
1 = Main Power ON
0 = Main Power OFF
VAUXA
VAUX Enable Status - Slot A
Represents the actual state (on/off) of the
Auxiliary Power output for Slot A
1 = AUX Power ON
0 = AUX Power OFF
VAUXAF
Overcurrent Fault: VAUXA supply
1 = Fault 0 = No fault
D[3]
Reserved
Always read as zero
12VAF
Overcurrent Fault: +12V supply
1 = Fault 0 = No fault
D[1]
Reserved
Always read as zero
3VAF
Overcurrent Fault: 3.3V supply
1 = Fault 0 = No fault
Power-Up Default Value:
0000 0000b = 00h
Command_Byte Value (R/W):
0000 0100b = 04h
The power-up default value is 00h. Both slots are 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 deassert /INT. The
status of the /FAULTA pin is not affected by reading the Status Register or by clearing active status bits.
Notes:
1. 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.
2.
Neither the FAULTA bits nor the /FAULTA pins are active when the MIC2591B 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.
3.
If /FORCE_ONA is asserted (low), the /FAULTA pin will be unconditionally forced to its open-drain state. Note, though, that the value in the FAULTA
register bit is not affected by /FORCE_ONA, but will instead continue to read as a high if no faults are present on Slot A, and as a low if any fault
conditions exist which would disable Slot A if /FORCE_ONA was not asserted.
read-only
read/write
read-only
read/write
read-only
read/write
FAULTA
MAINA
VAUXA
VAUXAF
Reserved
12VAF
Reserved
3VAF
Bit(s)
Function
Operation
FAULTA
FAULT Status - Slot A
1 = Fault pin asserted
(/FAULTA pin is LOW)
0 = Fault pin deasserted
(/FAULTA pin is HIGH)
See Notes 1, 2, and 3.
MAINA
MAIN Enable Status - Slot A
Represents the actual state (on/off) of the
two Main Power outputs for Slot A
(+12V and +3.3V)
1 = Main Power ON
0 = Main Power OFF
VAUXA
VAUX Enable Status - Slot A
Represents the actual state (on/off) of the
Auxiliary Power output for Slot A
1 = AUX Power ON
0 = AUX Power OFF
VAUXAF
Overcurrent Fault: VAUXA supply
1 = Fault 0 = No fault
D[3]
Reserved
Always read as zero
12VAF
Overcurrent Fault: +12V supply
1 = Fault 0 = No fault
D[1]
Reserved
Always read as zero
3VAF
Overcurrent Fault: 3.3V supply
1 = Fault 0 = No fault
Bit(s)
Function
Operation
FAULTA
FAULT Status - Slot A
1 = Fault pin asserted
(/FAULTA pin is LOW)
0 = Fault pin deasserted
(/FAULTA pin is HIGH)
See Notes 1, 2, and 3.
MAINA
MAIN Enable Status - Slot A
Represents the actual state (on/off) of the
(+12V and +3.3V)
1 = Main Power ON
0 = Main Power OFF
VAUXA
VAUX Enable Status - Slot A
Represents the actual state (on/off) of the
1 = AUX Power ON
0 = AUX Power OFF
VAUXAF
Overcurrent Fault: VAUXA supply
1 = Fault 0 = No fault
D[3]
Reserved
Always read as zero
12VAF
Overcurrent Fault: +12V supply
1 = Fault 0 = No fault
D[1]
Reserved
Always read as zero
3VAF
Overcurrent Fault: 3.3V supply
1 = Fault 0 = No fault
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
read-only
read/write
read-only
read/write
read-only
read/write
FAULTA
MAINA
VAUXA
VAUXAF
Reserved
12VAF
Reserved
3VAF
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
read-only
read/write
read-only
read/write
read-only
read/write
FAULTA
MAINA
VAUXA
VAUXAF
Reserved
12VAF
Reserved
3VAF
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
read-only
read/write
read-only
read/write
read-only
read/write
FAULTA
MAINA
VAUXA
VAUXAF
Reserved
12VAF
Reserved
3VAF
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
read-only
read/write
read-only
read/write
read-only
read/write
FAULTA
MAINA
VAUXA
VAUXAF
Reserved
12VAF
Reserved
3VAF
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
read-only
read/write
read-only
read/write
read-only
read/write
FAULTA
MAINA
VAUXA
VAUXAF
Reserved
12VAF
Reserved
3VAF
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
read-only
read/write
read-only
read/write
read-only
read/write
FAULTA
MAINA
VAUXA
VAUXAF
Reserved
12VAF
Reserved
3VAF
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
read-only
read/write
read-only
read/write
read-only
read/write
FAULTA
MAINA
VAUXA
VAUXAF
Reserved
12VAF
Reserved
3VAF
FAULTA
FAULT Status - Slot A
1 = Fault pin asserted
(/FAULTA pin is LOW)
0 = Fault pin deasserted
(/FAULTA pin is HIGH)
See Notes 1, 2, and 3.
MAINA
MAIN Enable Status - Slot A
Represents the actual state (on/off) of the
two Main Power outputs for Slot A
(+12V and +3.3V)
1 = Main Power ON
0 = Main Power OFF
VAUXA
VAUX Enable Status - Slot A
Represents the actual state (on/off) of the
Auxiliary Power output for Slot A
1 = AUX Power ON
0 = AUX Power OFF
VAUXAF
Overcurrent Fault: VAUXA supply
1 = Fault 0 = No fault
D[3]
Reserved
Always read as zero
12VAF
Overcurrent Fault: +12V supply
1 = Fault 0 = No fault
D[1]
Reserved
Always read as zero
3VAF
Overcurrent Fault: 3.3V supply
1 = Fault 0 = No fault
MAINA
MAIN Enable Status - Slot A
Represents the actual state (on/off) of the
VAUXA
VAUX Enable Status - Slot A
Represents the actual state (on/off) of the
Power-Up Default Value:
0000 0000
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