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Altera Corporation 1–27

December 2004 Nios Development Board Reference Manual, Cyclone Edition

Board Components

Figure 1–19. Safe Config Button

SW9 – Force Safe

Pressing Force Safe (SW9) commands the configuration controller to re-

configure the Cyclone device with the factory-programmed safe

configuration.

SW10 – Power-On Reset

Power-On Reset (SW10) is the power-on reset button (see Figure 1–20).

When SW10 is pressed, a logic 0 is driven to the power-on reset controller

(U18). See “Power-Supply Circuitry” on page 1–28 for more details. After

SW10 is pressed, the configuration controller will load the Cyclone device

from flash memory.

Figure 1–20. Power-On Reset Configuration Button

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Altera Nios Development Board Manual do Utilizador Página 35