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TMS320F28377S: Program abnormally

Part Number: TMS320F28377S
Other Parts Discussed in Thread: UNIFLASH

Hi experts,

My customers have multiple cases of 28377 (clearly identified as 28377) programing abnormally, They thought the issue is with the chip. We need your assistance in analyzing the cause. Thanks.

1, production line failure: .the production line can be programed successfully via C2Prog, but the DSP will not run after power up and failed to program the application code.

2: Put into the market for a period of time and found out that it failed, returning about 10PCS. If pull boot low with C2Prog, can burn successfully, but DSP will not run after power up, unable to burn application codes. .

They did following tests:

1. check crystal, reset and power are all OK.

2. ABA test.

Figure1: JTAG scan successfully

Figure2: programing through JTAG failed

Figure3:Programing through SCI and c2prog successfully