Error (169058): I/O standard SSTL-135 on output I/O pin cannot have Termination logic option setting Off

Description

You might receive the error above when using general purpose I/O pins and dual-purpose pins (such as INIT_DONE and CRC_ERROR) in a bank where VCCIO is set to 1.35 V, which is the voltage for the SSTL-135 standard used with DDR3L DRAM devices.

This error is because the SSTL-135 I/O standard only supports 34. / 40. termination for outputs.

Resolution

To work around the problem, add the following assignments to each general-purpose pin:

set_instance_assignment -name OUTPUT_TERMINATION "SERIES 40 OHM WITHOUT CALIBRATION" -to <pin name>
set_instance_assignment -name IO_STANDARD "SSTL-135" -to <pin_name>

For INIT_DONE, <pin_name> should be set to ~ALTERA_INIT_DONE~.  For CRC_ERROR, the <pin_name> should be set to ~ALTERA_CRC_ERROR~.

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