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TMS570LS1224: 16MHz External Clock is generating on TMS570LS1224. What could be the possible reasons?

Part Number: TMS570LS1224


We are using a Crystal "ECS-160-18-33Q-DS-TR" as an oscillator input  on MCU "TMS570LS1224" & We are flashing the MCU but it seems like clock signal is not generating. 

So, Please confirm if the clock needs to be enable internally or it should be externally? Please refer the attached image of Crystal connected through it. Also, Confirm if Crystal tuning is required for this?

Anyhow Temporarily We are able to flash our boards using TrimLPO function which is in system.c and Still while probing we are unable to see the clock signal. 

Please help here to resolve this issue.