Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Mixing Multi-device FPP configuration with JTAG

Hi, could someone clear this up for me: from SIII configuration manual: " On all Stratix III devices in the chain, nCE should be driven low by connecting it to ground, pulling it low vi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

The Configuration Handbook mentions this point more than once: nCE must be held low during JTAG configuration. You have two options to achieve this: 1. Connect the pin to ground. 2, If it's connected to preceeding devices nCEO in multi device chain (may be AS, AP, PS or PP), this device must be configured before, cause nCEO will go low only after succesful configuration. configured in the same order means the actual sequence in time. If you want to program all devices in a single action, then this would be identical to the order in JTAG chain which is also the order in the programming window.