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CCS/TM4C123GH6PM: CCS uart connection

Part Number: TM4C123GH6PM

Tool/software: Code Composer Studio

Hi.,

when i tried to read the microcontroller through UART interface i'm getting these errors:

Memory Map Initialization Complete
CORTEX_M4_0: Trouble Reading Memory Block at 0x400fe000 on Page 0 of Length 0x4: Read timed out
CORTEX_M4_0: Error occurred during flash operation: Target failed to read 0x400FE000
CORTEX_M4_0: Trouble Reading Memory Block at 0x400fe060 on Page 0 of Length 0x4: Read timed out
CORTEX_M4_0: Error occurred during flash operation: Target failed to read 0x400FE060
CORTEX_M4_0: Trouble Reading Memory Block at 0x400fe000 on Page 0 of Length 0x4: Read timed out
CORTEX_M4_0: Error occurred during flash operation: Target failed to read 0x400FE000
CORTEX_M4_0: Trouble Reading Memory Block at 0x400fe008 on Page 0 of Length 0x4: Read timed out
CORTEX_M4_0: Error occurred during flash operation: Target failed to read 0x400FE008
CORTEX_M4_0: Trouble Reading Memory Block at 0x400fe1a0 on Page 0 of Length 0x4: Read timed out
CORTEX_M4_0: Error occurred during flash operation: Target failed to read 0x400FE1A0
CORTEX_M4_0: Loader: One or more sections of your program falls into a memory region that is not writable. These regions will not actually be written to the target. Check your linker configuration and/or memory map.
CORTEX_M4_0: Trouble Reading Memory Block at 0x0 on Page 0 of Length 0x4: Read timed out
CORTEX_M4_0: File Loader: Verification failed: Target failed to read 0x00000000.

Please help me to debug the problem., 

Thanks.,

Sudharsan chinnaiyan.