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EP2C35A5Q324I6N 数据表(PDF) 83 Page - Altera Corporation |
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EP2C35A5Q324I6N 数据表(HTML) 83 Page - Altera Corporation |
83 / 168 page Altera Corporation 4–1 February 2007 4. Hot Socketing & Power-On Reset Introduction Cyclone® II devices offer hot socketing (also known as hot plug-in, hot insertion, or hot swap) and power sequencing support without the use of any external devices. You can insert or remove a Cyclone II board in a system during system operation without causing undesirable effects to the board or to the running system bus. The hot-socketing feature lessens the board design difficulty when using Cyclone II devices on printed circuit boards (PCBs) that also contain a mixture of 3.3-, 2.5-, 1.8-, and 1.5-V devices. With the Cyclone II hot-socketing feature, you no longer need to ensure a proper power-up sequence for each device on the board. The Cyclone II hot-socketing feature provides: ■ 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 This chapter also discusses the power-on reset (POR) circuitry in Cyclone II devices. The POR circuitry keeps the devices in the reset state until the VCC is within operating range. Cyclone II Hot-Socketing Specifications Cyclone II devices offer hot-socketing capability with all three features listed above without any external components or special design requirements. The hot-socketing feature in Cyclone II devices offers the following: ■ The device can be driven before power-up without any damage to the device itself. ■ I/O pins remain tri-stated during power-up. The device does not drive out before or during power-up, thereby affecting other buses in operation. CII51004-3.1 |
类似零件编号 - EP2C35A5Q324I6N |
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类似说明 - EP2C35A5Q324I6N |
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