MIC2590B Micrel Semiconductor, MIC2590B Datasheet - Page 17

• Manufacturer Part Number: MIC2590B
• Description: Dual-Slot PCI Hot Plug Controller
• Manufacturer: Micrel Semiconductor

Power-Up Default Value: 0000 0000
Command Byte (R/W):
To reset the OT_INT and UV_INT fault bits a logical 1
must be written back to these bits.
August 2002
MIC2590B
read-only read-only read-only read-only read-write read-write read-write read-only
Reserved Reserved
INTMSK
UV_INT
OT_INT
D[7]
Bit(s)
GPIB
GPIA
D[7]
D[6]
D[0]
Common Status Register, (STAT), 8-Bits Read/Write
D[6]
Reserved
Reserved
General Purpose Input, State of GPIB pin
Slot B
General Purpose Input, State of GPIA pin
Slot A
Interrupt Mask
Undervoltage
Interrupt
Overtemperature
Interrupt
Reserved
GPIB
D[5]
Function
D[4]
GPIA
0000 0110
INTMSK UV_INT
D[3]
enabled; 1 = /INT
generation is disabled.
The MIC2590B does not
participate in the SMBus
Alert Response Address
(ARA) Protocol.
Set whenever a circuit
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.
Set whenever a circuit
result of an over-
temperature condition
exceeding 160°C shutting
both channels off.
Always read as zero
Always read as zero
0 = /INT generation is
breaker fault condition
breaker fault occurs as a
Read Undefined
D[2]
b
b
Operation
= 00
= 06
OT_INT Reserved
h
h
D[1]
D[0]
17
MIC2590B
Micrel