Configuration Handbook - Kamami.pl

Configuration FeaturesV CCPGM PinsStratix III devices offer a new power supply, V CCPGM , for all the dedicatedconfiguration pins and dual function pins. Configuration voltagesupported is 1.8 V, 2.5 V, and 3.0 V. Stratix III devices do not support 1.5 Vconfiguration.Use this pin to power all dedicated configuration inputs, dedicatedconfiguration outputs, dedicated configuration bidirectional pins, andsome of the dual functional pins that you use for configuration. WithV CCPGM , configuration input buffers do not have to share power lineswith the regular I/O buffer in Stratix III devices.The operating voltage for the configuration input pin is independent ofthe I/O banks power supply V CCIO during the configuration. Therefore,no configuration voltage constraints on V CCIO are needed in Stratix IIIdevices.V CCPD PinsStratix III devices have a dedicated programming power supply, V CCPD ,which must be connected to 3.0 V /2.5 V in order to power the I/Opre-drivers, the JTAG input and output pins (TCK, TMS, TDI, TDO andTRST), and the design security circuitry.1 V CCPGM and V CCPD must ramp-up from 0 V to the desiredvoltage level within 100 ms. If these supplies are not ramped upwithin this specified time, your Stratix III device will notconfigure successfully. If your system does not allow ramp-uptime of 100 ms or less, you must hold nCONFIG low until allpower supplies are stable.fFor more information on the configuration pins power supply, refer to“Device Configuration Pins” on page 11–73.11–10 Altera CorporationStratix III Device Handbook, Volume 1 May 2007