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Configuration Handbook - Kamami.pl

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Device <strong>Configuration</strong> OptionsTable 6–1. <strong>Configuration</strong> Options (Part 3 of 5)Device OptionEnable devicewidereset(DEV_CLRn)Option UsageEnables a single pin,DEV_CLRn, to reset alldevice registers.Default <strong>Configuration</strong>(Option Off)Chip-wide reset is notenabled. The DEV_CLRn pinis available as a user I/O pin.Modified <strong>Configuration</strong>(Option On)Chip-wide reset is enabledfor all registers in the device.All registers are clearedwhen the DEV_CLRn pin isdriven low.Enable devicewideoutput enable(DEV_OE)Enables a single pin,DEV_OE, to control all devicetri-states.Chip-wide output enable isnot enabled. The DEV_OE pinis available as a user I/O pin.The DEV_CLRn pin cannotbe used to clear only some ofthe registers; every deviceregister is affected by thisglobal signal.Chip-wide output enable isenabled for all device tristates.After configuration, alluser I/O pins are tri-statedwhen DEV_OE is low.The DEV_OE pin cannot beused to tri-state only some ofthe output pins; every outputpin is affected by this globalsignal.Altera Corporation 6–7April 2007 <strong>Configuration</strong> <strong>Handbook</strong>, Volume 2

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