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MIC2590B-2YTQ Datasheet(PDF) 17 Page - Micrel Semiconductor

Part No. MIC2590B-2YTQ
Description  Dual-Slot PCI Hot Plug Controller
Download  23 Pages
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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MIC2590B-2YTQ Datasheet(HTML) 17 Page - Micrel Semiconductor

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Micrel, Inc.
MIC2590B
September 2008
17
M9999-091808
Common Status Register, (STAT), 8-Bits Read/Write
D[7]
read-only
D[6]
read-only
D[5]
read-only
D[4]
read-only
D[3]
read-
write
D[2]
read-
write
D[1]
read-
write
D[0]
read-only
Reserved
Reserved
GPIB
GPIA
INTMSK
UV_INT
OT_INT
Reserved
Bit(s)
Function
Operation
D[7]
Reserved
Always read as zero
D[6]
Reserved
Always read as zero
GPIB
General Purpose
Input, Slot B
State of GPIB pin
GPIA
General Purpose
Input, Slot A
State of GPIA pin
INTMSK
Interrupt Mask
0 = /INT generation is
enabled
1 = /INT generation is
disabled.
The MIC2590B does
not participate in the
SMBus Alert
Response Address
(ARA) Protocol.
UV_INT
Undervoltage Interrupt
Set whenever a
circuit Interrupt
breaker fault
condition occurs as a
result of an
undervoltage lockout
condition on one of
the main supply
inputs. This bit is only
set if a UVLO
condition occurs
while one or both of
the ON[A/B] pins are
asserted or the
MAIN[A/B] enable
control bits are set.
OT_INT
Overtemperature
Interrupt
Set whenever a
circuit breaker fault
occurs as a result of
an overtemperature
condition exceeding
160°C shutting both
channels off.
D[0]
Reserved
Read Undefined
Power-Up Default Value:
0000 0000b = 00h
Command Byte (R/W):
0000 0110b = 06h
To reset the OT_INT and UV_INT fault bits a logical
1must be written back to these bits.


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