TI E2E Community
Sitara Processors Forum
XAM3359 Boot up problem
We have prototypes built based on the XAM3359ZCZ and we have problem booting our boards.
Full part number displayed on the device is,
When the device is JTAGed the program is placed in an uexpected memory location
My customer has successfully booted the AM3359ZCZ on beaglebones and the CONTROL_MODULE control_status Register (0x44e10040) reads 0x00400317. but how ever on the prototype boards the CONTROL_MODULE control_status Register (0x44e10040) reads 0x00400017.
we note that according to the datasheet bits 8-10 of this register are read only and represent the ‘Device Type’, on the Beaglebone these are set to 011 which according to the datasheet indicates a ‘General Purpose (GP) Device’ whilst on our prototype boards these bits are set to 000 which is a ‘Reserved’ value.
Looking forward to hearing from you
A device type of 0 means the part is defective - it was shipped without the e-fuses being blown correctly. The boot ROM will not boot it.
Hi, a bit of a late response to the forum, but we have a batch of AM3359 ZCZ with identical codes to the original poster and are having problems getting the device to boot from SD card. We do not have access at the moment to JTAG, but can compare the 3359 EVM to our design.
My question is, can we be certain that devices with this batch code are all defective, or do we have to use JTAG to read registers to determine the state of the devices.
I do not want to waste time debugging defective silicon, nor do I want to waste time reworking boards if the silicon is OK.
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