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TMS320F28069: Flash reads out all 0

user4932132
Prodigy 80 points

Part Number: TMS320F28069
Other Parts Discussed in Thread: UNIFLASH

Hi，

Using below 2 ways to read the FLASH content

after unlock the device

1、Uniflash "Read Target Device" in the Memory view

or

2、CCS memory save

Flash（start：0x3D8000，length：0x20000） reads out all 0

2022/9/11 下午3:16:49] [INFO] C28xx: GEL Output: Device Calibration not complete, check if device is unlocked and recalibrate.

[2022/9/11 下午3:16:49] [INFO] C28xx: Starting device unlocking...
[2022/9/11 下午3:16:49] [INFO] C28xx: Device unlocked. To clear the programmed password, please erase Sector A of Flash memory.
[2022/9/11 下午3:16:56] [INFO] C28xx: GEL Output: Device Calibration not complete, check if device is unlocked and recalibrate.
[2022/9/11 下午3:17:23] [INFO] C28xx: GEL Output: Device Calibration not complete, check if device is unlocked and recalibrate.
[2022/9/11 下午3:17:37] [SUCCESS] Memory exported to: C:\Users\user123\AppData\Local\Temp\ti_cloud_storage\export_memory.bin

But flash should not all zeros, the led will shrink after power on.

Why can not correctly read the flash?

Regards，

Monica