參數(shù)資料
型號: MIC2592B-2BTQ
廠商: MICREL INC
元件分類: 電源管理
英文描述: Dual-Slot PCI Express Hot-Plug Controller
中文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQFP48
封裝: TQFP-48
文件頁數(shù): 24/31頁
文件大小: 1916K
代理商: MIC2592B-2BTQ
MIC2592B
Micrel
March 2005
24
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-only
read-only
read/write
read-only
read/write
read-only
read/write
FAULTA
MAINA
VAUXA
VAUXAF
Reserved
12VAF
Reserved
3VAF
Bit(s)
Function
Operation
See Notes 1, 2, and 3.
Represents the actual state (on/off) of the
0 = Main Power OFF
Represents the actual state (on/off) of the
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:
Command_Byte Value (R/W):
0000 0000b = 00h
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 MIC2592B 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.
(/FAULTA pin is HIGH)
1 = Main Power ON
1 = AUX Power ON
0 = Fault pin deasserted
two Main Power outputs for Slot A
(+12V and +3.3V)
Auxiliary Power output for Slot A
FAULTA
FAULT Status - Slot A
1 = Fault pin asserted
(/FAULTA pin is LOW)
MAINA
MAIN Enable Status - Slot A
VAUXA
VAUX Enable Status - Slot A
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