MIC2593 Micrel Semiconductor, MIC2593 Datasheet - Page 20

• Manufacturer Part Number: MIC2593
• Description: Dual-Slot PCI Hot Plug Controller
• Manufacturer: Micrel Semiconductor

MIC2593
Common Status Register (CS)
8-Bits, Read/Write
To reset the OT_INT and UV_INT fault bits, a logical 1 must be written back to these bits.
M9999-042204
read-write
Reserved
INTMSK
UV_INT
OT_INT
GPI_B
GPI_A
Bit(s)
D[7]
D[7]
D[6]
D[0]
Power-Up Default Value: 00000000
Command_Byte Value (R/W): 00000110
Reserved
Reserved
General Purpose Input 0, Slot B
General Purpose Input 0, Slot A
Interrupt Mask
Undervoltage Interrupt
Overtemperature Interrupt
Reserved
read-write
Reserved
D[6]
read-only
GPI_B
Function
D[5]
Common Status Register (CS)
b
= 00
b
h
= 06
read-only
GPI_A
D[4]
h
20
read-write
INTMSK
D[3]
Always read as zero
Always read as zero
State of GPIB pin
State of GPIA pin
0 = /INT generation is enabled.
1 = /INT generation is disabled. The
MIC2593 does not participate in the SMBus
Alert Response Address (ARA) protocol.
0 = No UVLO fault
1 = UVLO fault
Set whenever a circuit 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 the ON[A/B] pin is asserted or the
MAIN[A/B] control bits are set.
0 = Die Temp < 160 C.
1 = Fault: Die Temp > 160 C.
Set if a fault occurs as a result of the
MIC2593’s die temperature exceeding
160 C.
Undefined.
read-write
UV_INT
D[2]
Operation
read-write
OT_INT
D[1]
Reserved
read-only
April 2004
D[0]
Micrel