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MIC2590B-2YTQ Datasheet(PDF) 5 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) 5 Page - Micrel Semiconductor

 
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Micrel, Inc.
MIC2590B
September 2008
5
M9999-091808
Pin Number
Pin Name
Pin Function
1, 36
/FAULTA, /FAULTB
Open Drain, Active-Low: Asserted whenever the circuit breaker trips due to a
fault condition.
/FAULT[A/B] is reset by bringing the faulted slot’s ON pin low if /FAULT was
asserted in response to a fault condition on one of the slot’s MAIN outputs(+12V,
+5V, +3.3V, or –12V).
/FAULT[A/B] is reset by bringing the faulted slot’s AUXEN pin low if /FAULT was
asserted in response to a fault condition on the slot’s VAUX output.
If a fault condition occurred on both the MAIN and AUX outputs of the same slot,
then both ON and AUXEN must be brought low to de-assert the /FAULT output.
2, 35
CFILTERA, CFILTERB
Filter Capacitor [A/B]: Capacitors connected between these pins and ground set
the duration of tFLT. tFLT is the amount of time for which a slot remains incurrent-
limit before its circuit breaker is tripped.
37
/INT
Interrupt Output: Open Drain, Active-low. Asserted whenever a power faulti s
detected. Cleared by writing a logic 1 to the respective active bit into the Status
Register.
48
SDA
SMBus Data: Bidirectional SMBus data line.
47
SCL
SMBus Clock: Input.
39, 40, 41
A2, A1, A0
SMBus Address Select pins: Connect to ground or leave open in order to
program device SMBus base address. There is an internal pull-up to VSTBY on
each of these inputs.
4, 38
GPIA, GPIB
General Purpose Inputs: The state of these inputs are available by reading the
Common Status Register.
46
GND
Ground


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