Appendix C. Known Issues - Lattice Semiconductor ispMACH 4256ZE User Manual

Appendix C. Known Issues

1. The ispMACH 4000ZE 1532 interface signals TCK, TMS, TDI and TDO are referenced to VCC=1.8V (logic
core). The ispMACH 4256ZE Breakout Board has an issue where the JTAG signals are connected to the FTDI
which has a 3.3V interface. This circuit should not be replicated in a production board. As a work-around
another FTDI device could be selected or a level translator could be used between the FTDI device and the
ispMACH 4000ZE.
ispMACH 4256ZE Breakout Board
Evaluation Kit User's Guide
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