參數(shù)資料
型號： 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
文件頁數(shù)： 21/34頁
文件大小： 1920K
代理商： MIC2591B-5YTQ
March 2005
28
M9999-033105
MIC2591B
Micrel
Status Register Slot B (STATB)
8-Bits, Read-Only
Status Register, Slot B (STATB)
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
FAULTB
MAINB
VAUXB
VAUXBF
Reserved
12VBF
Reserved
3VBF
Bit(s)
Function
Operation
FAULTB
FAULT Pin Status - Slot B
1 = Fault pin asserted
(/FAULTB pin is LOW)
0 = Fault pin deasserted
(/FAULTB pin is HIGH)
See Notes 1, 2, and 3.
MAINB
MAIN Enable Status - Slot B
Represents the actual state (on/off) of the
four Main Power outputs for Slot B
(+12V and +3.3V)
1 = MAIN Power ON
0 = MAIN Power OFF
VAUXB
VAUX Enable Status - Slot B
Represents the actual state (on/off) of the
Auxiliary Power output for Slot B
1 = AUX Power ON
0 = AUX Power OFF
VAUXBF
Overcurrent Fault: VAUXB supply
1 = Fault 0 = No fault
D[3]
Reserved
Always read as zero
12VBF
Overcurrent Fault: +12V supply
1 = Fault 0 = No fault
D[1]
Reserved
Always read as zero
3VBF
Overcurrent Fault: 3.3V supply
1 = Fault 0 = No fault
Power-Up Default Value:
0000 0000b = 00h
Command_Byte Value (R/W):
0000 0101b = 05h
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 /FAULTB pin is not affected by reading the Status Register or by clearing active status bits.
Notes:
1.
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.
2.
Neither the FAULTB bits nor the /FAULTB pins are active when the MIC2591B power paths are controlled by the System Management Interface.
When using SMI power path control, the AUXENB and ONB pins for that slot must be tied to GND.
3:. If /FORCE_ONB is asserted (low), the /FAULTB pin will be unconditionally forced to its open-drain state. Note, though, that the value in the FAULTB
register bit is not affected by /FORCE_ONB, but will instead continue to read as a high if no faults are present on Slot B, and as a low if any fault
conditions exist which would disable Slot B if /FORCE_ONB was not asserted.
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
FAULTB
MAINB
VAUXB
VAUXBF
Reserved
12VBF
Reserved
3VBF
FAULTB
FAULT Pin Status - Slot B
1 = Fault pin asserted
(/FAULTB pin is LOW)
0 = Fault pin deasserted
(/FAULTB pin is HIGH)
See Notes 1, 2, and 3.
MAINB
MAIN Enable Status - Slot B
Represents the actual state (on/off) of the
four Main Power outputs for Slot B
(+12V and +3.3V)
1 = MAIN Power ON
0 = MAIN Power OFF
VAUXB
VAUX Enable Status - Slot B
Represents the actual state (on/off) of the
Auxiliary Power output for Slot B
1 = AUX Power ON
0 = AUX Power OFF
VAUXBF
Overcurrent Fault: VAUXB supply
1 = Fault 0 = No fault
D[3]
Reserved
Always read as zero
12VBF
Overcurrent Fault: +12V supply
1 = Fault 0 = No fault
D[1]
Reserved
Always read as zero
3VBF
Overcurrent Fault: 3.3V supply
1 = Fault 0 = No fault
Bit(s)
Function
Operation
FAULTB
FAULT Pin Status - Slot B
1 = Fault pin asserted
(/FAULTB pin is LOW)
0 = Fault pin deasserted
(/FAULTB pin is HIGH)
See Notes 1, 2, and 3.
MAINB
MAIN Enable Status - Slot B
Represents the actual state (on/off) of the
four Main Power outputs for Slot B
(+12V and +3.3V)
1 = MAIN Power ON
0 = MAIN Power OFF
VAUXB
VAUX Enable Status - Slot B
Represents the actual state (on/off) of the
Auxiliary Power output for Slot B
1 = AUX Power ON
0 = AUX Power OFF
VAUXBF
Overcurrent Fault: VAUXB supply
1 = Fault 0 = No fault
D[3]
Reserved
Always read as zero
12VBF
Overcurrent Fault: +12V supply
1 = Fault 0 = No fault
D[1]
Reserved
Always read as zero
3VBF
Overcurrent Fault: 3.3V supply
1 = Fault 0 = No fault
Bit(s)
Function
Operation
FAULTB
FAULT Pin Status - Slot B
1 = Fault pin asserted
(/FAULTB pin is LOW)
0 = Fault pin deasserted
(/FAULTB pin is HIGH)
See Notes 1, 2, and 3.
MAINB
MAIN Enable Status - Slot B
Represents the actual state (on/off) of the
four Main Power outputs for Slot B
(+12V and +3.3V)
1 = MAIN Power ON
0 = MAIN Power OFF
VAUXB
VAUX Enable Status - Slot B
Represents the actual state (on/off) of the
Auxiliary Power output for Slot B
1 = AUX Power ON
0 = AUX Power OFF
VAUXBF
Overcurrent Fault: VAUXB supply
1 = Fault 0 = No fault
D[3]
Reserved
Always read as zero
12VBF
Overcurrent Fault: +12V supply
1 = Fault 0 = No fault
D[1]
Reserved
Always read as zero
3VBF
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
FAULTB
MAINB
VAUXB
VAUXBF
Reserved
12VBF
Reserved
3VBF
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
FAULTB
MAINB
VAUXB
VAUXBF
Reserved
12VBF
Reserved
3VBF
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
FAULTB
MAINB
VAUXB
VAUXBF
Reserved
12VBF
Reserved
3VBF
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
FAULTB
MAINB
VAUXB
VAUXBF
Reserved
12VBF
Reserved
3VBF
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
FAULTB
MAINB
VAUXB
VAUXBF
Reserved
12VBF
Reserved
3VBF
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
FAULTB
MAINB
VAUXB
VAUXBF
Reserved
12VBF
Reserved
3VBF
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
FAULTB
MAINB
VAUXB
VAUXBF
Reserved
12VBF
Reserved
3VBF
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