6975 - MachXO3D: The VCCIO0 ( Bank 0 ) is tied to 1.8V making the JTAG interface 1.8 V. Can I pull the TDO output higher ( 2.5V, 3.3V )than the VCCIO?

• Related Articles

• 1997 - Power Manager II: What is the buffer type for the POWR1220AT8 JTAG TDO pin and what voltage should the pull-up resistor be tied to for this pin?

  The JTAG TDO pin is an LVCMOS output that is referenced to the voltage applied to the VCCJ pin. The voltage reference for this pin is shown in note 1 to the Digital Specifications table on page 1-11 of the ispPAC-POWR1220AT8 data sheet. There is no ...

• 6996 - iCE40: Does Bank 3 have any internal pull-up resistors for iCE40?

  Details: GPIOs found in Banks have no internal pull-ups, only Banks 0-2 have internal pull-ups. Since they do not have any internal pull-up in Bank 3, we recommend tying the unused PIO pins in Bank 3 to a known logic or driving them with disabled ...

• 1827 - LatticeECP3: Does it allow for a multiple I/Os be connected in parallel to have higher combined output current exceeding that of a single I/O?

  LatticeECP3 FPGA 3.3V or 2.5V LVCMOS output pin can support maximum 20mA source or sink current per I/O. In order to support higher current I/O, a user can connect multiple adjacent I/O pins together to produce combined higher source or sink current. ...

• 2118 - Lattice ECP3: Can I connect an external Low Voltage Differential Signal 2.5V (LVDS25) clock output to a Lattice ECP3 DDR3 bank which is a 1.5V VCCIO bank?

  Yes, the user can drive an external Low Voltage Differential Signal (LVDS) clock generator to an input pair of the LatticeECP3 1.5V VCCIO bank. Although the Lattice ECP3 LVDS25 is characterized in 2.5V and 3.3V, the user can safely use an external ...

• 1254 - How to define different VCCIO voltage in different IO bank for FPGA such as SC/ECP2/ECP2M/ECP3 devices? Why is it necessary?

  When running ispLEVER software tool, edit the project preference file *.lpf by following the example below to add these preference to set the BANK voltages to match the circuit board design and how the device is connected on board: BANK 0 VCCIO 3.3 ...