ADuC 7061 JLink "Cannot stop ARM device"

Question

Keil mVision V15.4.0.0. J-Link is default, not Chinese.. 
 Something happened to the software and ADuC 7061 doesn't respond. Message JLink: "Cannot stop ARM device". Оn 6 chips. How can I erase the chips?

Karl.O · Accepted Answer

There should be some confirmation when the device enters the Serial Download Mode. 
 Have you initiated the sequence to enter serial download mode? 
 To enter serial download mode: 
 Pull down and Hold Pin 29 (NTRST) to GND 
 Pull down and Hold Pin 1 (RESET) to GND 
 Pull up Pin 1 to DVDD 
 Pull up Pin 29 to DVDD)