EP3SE50F780I3N Altera, EP3SE50F780I3N Datasheet - Page 353

• Manufacturer Part Number: EP3SE50F780I3N
• Description: Stratix III
• Manufacturer: Altera

Introduction
Stratix III
Hot-Socketing
Specifications
Altera Corporation
October 2007
SIII51010-1.2
This document contains information on hot socketing specifications,
power-on reset requirements, and their implementation in Stratix
devices.
Stratix III devices offer hot socketing, which is also known as hot plug-in
or hot swap, and power sequencing support without the use of any
external devices. You can insert or remove a Stratix III device or a board
in a system during system operation without causing undesirable effects
to the running system bus or the board that was inserted into the system.
The hot socketing feature also removes some of the difficulty when you
use Stratix III devices on printed circuit boards (PCBs) that contain a
mixture of 3.3, 3.0, 2.5, 1.8, 1.5 and 1.2 V devices. With the Stratix III hot
socketing feature, you no longer need to ensure a proper power-up
sequence for each device on the board.
The Stratix III hot socketing feature provides:
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This section also discusses the power-on reset (POR) circuitry in Stratix III
devices. The POR circuitry keeps the devices in the reset state until the
power supplies are within operating range.
Stratix III devices are hot-socketing compliant without the need for any
external components or special design requirements. Hot socketing
support in Stratix III devices has the following advantages:
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Board or device insertion and removal without external components
or board manipulation.
Support for any power-up sequence.
Non-intrusive I/O buffers to system buses during hot insertion.
You can drive the device before power-up without damaging it.
I/O pins remain tri-stated during power-up. The device does not
drive out before or during power-up, thereby not affecting other
buses in operation.
You can insert or remove a Stratix III device from a powered-up
system board without damaging or interfering with normal
system/board operation.
Power-On Reset in Stratix III
10. Hot Socketing and
Devices
®
III
10–1