[FRAM71] Pre-Production Batch
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06-09-2015, 01:32 PM
(This post was last modified: 06-09-2015 01:34 PM by Hans Brueggemann.)
Post: #129
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RE: [FRAM71] Pre-Production Batch
TL; DR: FlashPro4 needs special programming cable with VJTAG support, otherwise will give error.
I have just received a note from michael that the FlashPro4 programmer is not working on his FFRAM71 when using a programming cable that was made according to dave's suggestions. the reason is that dave's module, as well some others, but not all modules from the pre-production batch, still has R10, R11 installed (RTFM). the production batch has those resistors removed in order to conserve a couple of microamps in current consumption. With R10, R11 removed, there is no VJTAG supply to the programmer, and that's why the programmer throws a vjtag error. Until i have a solution for a programming cable, users who run into this issue can connect CN5:5 to CN3:2 during programming (yep, soldering required and again, RTFM). don't forget to remove the connection after programming is done, will save a bit on battery life. Hans |
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