7197 - All Nexus: What is the default drive strength for I/O pins?

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• 565 - Does reducing drive strength save power?

  Reducing drive strength can be used to save dynamic power. The savings will be in the uA range. Reducing drive strength will improve Simultaneous Switching Output (SSO).

• 4045 - iCE40 : What is the default status of I/O pins before the configuration of an <em>iCE40 </em>device?

  The default status of I/O pins before the configuration of an iCE40 device is tri-stated with a weak pull-up to VCCIO.

• 6738 - All Nexus: What is the function of the PCLKDIVTESTINPX pins of the PCLKDIV primitive and what values should these pins be driven?

  The PCLKDIVTESTINPX pins, together with the TESTEN_PCLKDIV and TESTMODE_PCLKDIV on the parameter lists, are signals and parameters used for test modes to test the PCLKDIV primitive in the factory. To enable normal operation, you need to set the ...

• 1066 - What are the hardware default settings of the ECP2/M sysCONFIG ports?

  Basically, all the sysCONFIG pins have hardware default settings as standard LVCMOS IO configuration after power-up. When sysCONFIG pins act as driver, they are 8ma drivers when VCCIO8 @3.3V/2.5V/1.8V. They become 4ma pull up when VCCIO8 @1.5V/1.2V ...

• 1033 - Do the unused I/O pins need to be grounded in a device?

  Lattice devices have weak internal pull-ups on all I/Os. So the I/O pins which are not used in the design do not need to be grounded or connected anywhere. Some of Lattice devices have global setting for pull-ups on IOs like On, Off or Bus Hold, and ...