Configuration Handbook - Kamami.pl

JTAG ConfigurationFigure 7–35. JTAG Configuration of a Single Device Using a Download CableVCC (1)(1) VCC(1) VCC 10 kΩ10 kΩGND N.C.Stratix II DevicenCE (4)TCKnCE0TDO10 kΩVCC (1)10 kΩ(2)(2)nSTATUSCONF_DONEnCONFIGMSEL[3..0]TMSTDITRSTVCCDownload Cable10-Pin Male Header(JTAG Mode)(Top View)Pin 1VCCGNDVIO (3)10 kΩGNDGNDNotes to Figure 7–35:(1) The pull-up resistor should be connected to the same supply voltage as the USB Blaster, MasterBlaster (V IO pin),ByteBlaster II, or ByteBlasterMV cable.(2) The nCONFIG, MSEL[3..0] pins should be connected to support a non-JTAG configuration scheme. If only JTAGconfiguration is used, connect nCONFIG to V CC , and MSEL[3..0] to ground. Pull DCLK either high or low,whichever is convenient on your board.(3) Pin 6 of the header is a V IO reference voltage for the MasterBlaster output driver. V IO should match the device’sV CCIO . Refer to the MasterBlaster Serial/USB Communications Cable Data Sheet for this value. In the ByteBlasterMVcable, this pin is a no connect. In the USB Blaster and ByteBlaster II cables, this pin is connected to nCE when it isused for active serial programming, otherwise it is a no connect.(4) nCE must be connected to GND or driven low for successful JTAG configuration.To configure a single device in a JTAG chain, the programming softwareplaces all other devices in bypass mode. In bypass mode, devices passprogramming data from the TDI pin to the TDO pin through a singlebypass register without being affected internally. This scheme enables theprogramming software to program or verify the target device.Configuration data driven into the device appears on the TDO pin oneclock cycle later.The Quartus II software verifies successful JTAG configuration uponcompletion. At the end of configuration, the software checks the state ofCONF_DONE through the JTAG port. When Quartus II generates a (.jam)file for a multi-device chain, it contains instructions so that all the devicesin the chain will be initialized at the same time. If CONF_DONE is not high,the Quartus II software indicates that configuration has failed. If7–86 Altera CorporationStratix II Device Handbook, Volume 2 May 2007