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Newbie yrli2019
Newbie
163 Views
Registered: ‎02-07-2019

Zyqn 7 ARM processor memory read error

1) Power cycled Zyqn board after program the flash(QSPI).


2) Got an memory read error message shown below


   "Memory read error at 0x********.  AP transaction timeout"


   "Memory read error at 0x*********. AHB AP Transaction error, DAP status f0000021"


  This memory read was just to read the FPGA firmware version register.   We were able to read this register successffully when it was done in Vivado 2015.4 environment.  Without any design changes or updated (simply ported/migrated from 2015.4 to 2018.2 environment), we got this memory read error in Vivado 2018.2 environment.


Any helps and ideas are appreciated.

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