MPCBL5524A1D Intel, MPCBL5524A1D Datasheet - Page 84

• Manufacturer Part Number: MPCBL5524A1D
• Manufacturer: Intel

Specifications of MPCBL5524A1D

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Reset
Reset
C.1
C.1.1
C.1.2
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Intel NetStructure
This appendix discusses the various reset types and reset sources on the ZT 5524 / MPCBL5524.
Because many embedded systems have different requirements for board reset functions, the
incorporation of this sub-system on the ZT 5524 / MPCBL5524 has been designed to provide
maximum flexibility.
Reset Types and Sources
The three reset types of the ZT 5524 / MPCBL5524 are listed below. The sources for each reset
type are detailed in the following topics.
Backend Power Down Sources
Board Extraction
When a board is extracted from an enclosure (specifically, when the short, board select pin is
disengaged), the hot swap controller unconditionally removes backend power from the board and
holds the ZT 5524 / MPCBL5524 in reset.
Low Voltage
When the 3.3 V, 5 V, and 12 V supply voltages are detected as below an acceptable operating limit,
the Hot Swap controller unconditionally removes backend power and holds the ZT 5524 /
MPCBL5524 in reset.
Overcurrent Fault
If a power fault condition (overcurrent) is detected, the BMC removes backend power and turns the
Power/Reset LED indicator Amber. The ZT 5524 / MPCBL5524 is held in reset.
General Reset Sources
Push-Button Reset
When the System Reset button (SW1) on the faceplate is pressed, the ZT 5524 / MPCBL5524
resets itself and drives PCIRST on both CompactPCI buses. Sources for push-button reset include:
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Backend Power Down: The backend logic is powered off. All on-board devices are reset and
PCIRST# is driven on the system backplane.
General Reset: All on-board devices are reset and PCIRST# is driven on the system
backplane.
NMI: Non-maskable interrupt. Though not a reset in the strict sense, an NMI can have the
same effect as other resets.
Faceplate push-button Reset switch (SW1)
Programmable watchdog timer
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ZT 5524 / MPCBL5524 High-Performance System Master Processor Board TPS
C