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CPLD Device with designator U3: LCMX02-256HC

Feature Summary

  • Power Management
  • FPGA, USB Reset Managment
  • JTAG routing

Firmware Revision and supported PCB Revision

See Document Change History

Product Specification

Port Description

Name / opt. VHD NameDirectionPinDescription
3.3V / PG_SENSEin25Power Sense
DONE        in28FPGA Done Pin
EN1         in11Enable Pin From B2B
F_TCK       out17JTAG from/to FPGA
F_TDI       out23JTAG from/to FPGA
F_TDOin9JTAG from/to FPGA
F_TMS       out10JTAG from/to FPGA
FPGA_IO2     20/ currently_not_used
JTAGEN      in26Switch JTAG between CPLD and FPGA (logical one for CPLD, logical zero for FPGA)
MODE        in13/ currently_not_used
NOSEQ       inout14/ currently_not_used
PG_DDR_PWRin4Power Good from DDR
PGOOD       out12Power Good to B2B
PROG_B      out27FPGA PROG_B
RESIN       in16Reset Pin From B2B
SYSLED1out8LED (Green)
TCK    in30JTAG from/to B2B
TDIin32JTAG from/to B2B
TDO         out1JTAG from/to B2B
TMSin29JTAG from/to B2B


Functional Description


JTAG signals routed directly through the CPLD to FPGA. Access between CPLD and FPGA can be multiplexed via JTAGEN (logical one for CPLD, logical zero for FPGA).


Power Good Pin is zero, if RESIN, EN1, PG_SENSE or PG_DDR_PWR are low, else high impedance. EN1 is also used to enable 1V Power (connected directly outside of the CPLD).


PROG_B is set to one, if power is good.

FTDI_RESET_N is set to one, if power is good.


SYSLED1 (Green LED D1)ON when RESIN=0, else FGPIO1 when DONE=1 else Blinking

Appx. A: Change History

Revision Changes

Document Change History

To get content of older revision  got to "Change History"  of this page and select older document revision number.

DateDocument RevisionCPLD Firmware RevisionSupported PCB RevisionAuthorsDescription

REV01REV01document style update
2017-03-08v.7REV01REV01John HartfielRevision 01 finished


REV01REV01Initial release

Appx. B: Legal Notices

Data Privacy

Please also note our data protection declaration at

Document Warranty

The material contained in this document is provided “as is” and is subject to being changed at any time without notice. Trenz Electronic does not warrant the accuracy and completeness of the materials in this document. Further, to the maximum extent permitted by applicable law, Trenz Electronic disclaims all warranties, either express or implied, with regard to this document and any information contained herein, including but not limited to the implied warranties of merchantability, fitness for a particular purpose or non infringement of intellectual property. Trenz Electronic shall not be liable for errors or for incidental or consequential damages in connection with the furnishing, use, or performance of this document or of any information contained herein.

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Copyright Notice

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Technology Licenses

The hardware / firmware / software described in this document are furnished under a license and may be used /modified / copied only in accordance with the terms of such license.

Environmental Protection

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Trenz Electronic GmbH herewith declares that all its products are developed, manufactured and distributed RoHS compliant.


Information for users within the European Union in accordance with Directive 2002/96/EC of the European Parliament and of the Council of 27 January 2003 on waste electrical and electronic equipment (WEEE).

Users of electrical and electronic equipment in private households are required not to dispose of waste electrical and electronic equipment as unsorted municipal waste and to collect such waste electrical and electronic equipment separately. By the 13 August 2005, Member States shall have ensured that systems are set up allowing final holders and distributors to return waste electrical and electronic equipment at least free of charge. Member States shall ensure the availability and accessibility of the necessary collection facilities. Separate collection is the precondition to ensure specific treatment and recycling of waste electrical and electronic equipment and is necessary to achieve the chosen level of protection of human health and the environment in the European Union. Consumers have to actively contribute to the success of such collection and the return of waste electrical and electronic equipment. Presence of hazardous substances in electrical and electronic equipment results in potential effects on the environment and human health. The symbol consisting of the crossed-out wheeled bin indicates separate collection for waste electrical and electronic equipment.

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