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 ...
Description: This article lists the default drive strength for different IO_TYPE for Nexus products. Solution: For Nexus products, these are the default drive strength set in Radiant SW according to the IO_TYPE, and they are applicable for both Wide ...
The silicon default of a bulk-erased MachXO device is as follows: Inputs are enabled, and referenced to Vccio. Buskeepers default to pullup. Outputs are tri-stated and default to 8ma at Vccio=1.8V and slow slew.
The LatticeECP2/M does not have a way to configure pull-up resistors on the I/O prior to the device being programmed. The LatticeECP2/M and LatticeSC/SCM do support hot socketing (or hot-swap). During power-up and power-down sequences, the I/Os ...
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 ...