AR #33622 - Spartan-6 FPGA - How should I connect the RFUSE pin when eFUSE is not used?
Spartan-6 FPGA - How should I connect the RFUSE pin when eFUSE is not used?
| AR# | 33622 |
| Part | Config-SMAP/Parallel |
| Last Modified | 2009-10-28 00:00:00.0 |
| Status | Active |
| Keywords | XC6SLX75, XC6SLX75T, XC6SLX100, XC6SLX100T, XC6SLX150, XC6SLX150T, VFS, float, encryption, Decryptor Key |
Description
Keywords: XC6SLX75, XC6SLX75T, XC6SLX100, XC6SLX100T, XC6SLX150, XC6SLX150T, VFS, float, encryption, Decryptor Key
How should I connect the RFUSE input pin on the Spartan-6 device when eFUSE is not used?
Solution
If the Decryptor Key EFUSE is used, then connect VFS to a 3.3V supply (+/- 100 mV) that is capable of delivering 40 mA for fuse programming. RFUSE needs to be connected to ground via 1140 Ohm (1%) resistor.If the Decryptor Key EFUSE is not used, then connect VFS to VCCAUX. RFUSE can be left floating.
The following documentation is scheduled to be updated with this information:
- Spartan-6 FPGA Configuration, User Guide (UG380)
- Spartan-6 FPGA Packaging and Pinouts, Advance Product Specification (UG385)