Mity CPU Platforms » MitySOM-AM62, MitySOM-AM62A, & MitySOM-AM62P

06/02/2023

MW 12:56 PM PCB Development: RE: JTAG TRSTn pulldown and other JTAG pullups

I corrected the last post. TDO is not pulled up or down on the SOM. Michael Williamson

MW 12:55 PM PCB Development: RE: JTAG TRSTn pulldown and other JTAG pullups

Hello,
The SOM includes the following on the JTAG related lines:
* 4.7K Pulldown on TRSTn
* 4.7k Pullup to VDDSHV_MCU on the following lines:
** TCK
** TDI
** TMS
** EMU0
** EMU1
This is a snippet of the schematic on the S... Michael Williamson

PS 12:03 PM PCB Development: JTAG TRSTn pulldown and other JTAG pullups

The AM62x datasheet states (in section 6.4) that an external pulldown is required on the TRSTn line. Is this implemented on the module (if so, it might not be publicly documented), or the host board needs to add this pulldown?
What ab... Pal Szabo