Step 1: Turn off the ECR, and then open the ECR case. Short the ISP pin on the motherboard.

Step 2: Serial cable to connect computer and ECR.  Must RS232-I or miniUSB

 Step 3: Turn on the ECR with ISP shorted. (At this point, the ECR display is not lit)  Run the STM on PC immediately.

Press <NEXT>

Press <NEXT>

Select [STM32F2_512K]，and click [Next] button

Select the target file (e.g. Aer260.hex), click [Next] button to upload the target software to ER260.

Step 4: Turn off ECR, then remove ISP shorted.

End of the update process.