Configuration Handbook - Kamami.pl

JTAG ConfigurationTable 11–13. Dedicated Configuration Pin Connections During JTAGConfiguration (Part 2 of 2)SignalnCONFIGnSTATUSCONF_DONEDCLKDescriptionDriven high by connecting to V CC , pulling up via a resistor, ordriven high by some control circuitry.Pull to V CC via a 10-kΩ resistor. When configuring multipledevices in the same JTAG chain, each nSTATUS pin should bepulled up to V CC individually.Pull to V CC via a 10-kΩ resistor. When configuring multipledevices in the same JTAG chain, each CONF_DONE pin should bepulled up to V CC individually. CONF_DONE going high at the end ofJTAG configuration indicates successful configuration.Should not be left floating. Drive low or high, whichever is moreconvenient on your board.When programming a JTAG device chain, one JTAG-compatible header isconnected to several devices. The number of devices in the JTAG chain islimited only by the drive capability of the download cable. When four ormore devices are connected in a JTAG chain, Altera recommendsbuffering the TCK, TDI, and TMS pins with an on-board buffer.JTAG-chain device programming is ideal when the system containsmultiple devices, or when testing your system using JTAG BST circuitry.Figure 11–30 shows multi-device JTAG configuration.11–70 Altera CorporationStratix III Device Handbook, Volume 1 May 2007