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CompanyTrenz Electronic GmbH
DN NumberDN-20210519
TitleDesign Note TE0710-02 CPLD Firmware
SubjectCPLD Firmware
Issue Date

2021-05-20

Products Affected

This Design Note affects all SoMs TE0710 revision 02:

Product

TE0710-02-*

Description

TE0710-02 does not have any hardware pullup on the reset signal. In combination with baseboards (e.g. TE0706-03 or other custom baseboards) without pullup on this signal, reset will never be released. this can be overcome by changing the CPLD Firmware on TE0710-02.  Therefore a CPLD software is available at the Download Area of the module (SC-PGM-TE0710-02_SC0710-02_preliminary_20210520.zip).

Following changes compared to the standard firmware are included:

  • added pullup on RESET

  • PGOOD tristate is now with high impedance and pullup

  • pullup/downs on JTAG (some pulldown instead of pullup because CPLD JTAG to FPGA JTAG has different 3.3V power domain, pulldown is used to archive correct power sequencing)

A description of how to update the firmware is availabe in the wiki documentation. The checksum for the new firmware is 0x0141, visible in Diamond Programmer. The standard firmware has the checksum 0xEC44.

Contact Information

If you have any questions related to this Design Note, please contact Trenz Electronics Technical Support at

Disclaimer

Any statment in this DN is based on the most current product information at the time this DN is being issued. For any further information, please contact your local Trenz Electronic sales office, technical support.


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