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AM3358: No "CCC..." output on debug UART

Part Number: AM3358
Other Parts Discussed in Thread: TPS65910

Hi.

I made designed PCB with AM3358 and TPS65910.

But in booting sequence, there is no 'C' characters output in UART.

I checked the voltages of each power rail and power sequence. And it looks like there is no problem.

24MHz clock did oscilate(well, it was distorted a little...), and 32.768kHz clock didn't oscilate.(RTC clock disabled by default at reset release time, right?)

So I checked with JTAG and I got messege as below.

-----[An error has occurred and this utility has aborted]--------------------

This error is generated by TI's USCIF driver or utilities.

The value is '-233' (0xffffff17).
The title is 'SC_ERR_PATH_BROKEN'.

The explanation is:
The JTAG IR and DR scan-paths cannot circulate bits, they may be broken.
An attempt to scan the JTAG scan-path has failed.
The target's JTAG scan-path appears to be broken
with a stuck-at-ones or stuck-at-zero fault.

 

Anyone help me what should I check more?