exit from debug mode (S110)

RE: exit from debug mode (S110)

Susheel Nuguru — Thu, 25 Jun 2015 06:40:38 GMT

That is an input pin to the nRF chip, so on devkits it is controlled by Segger ATMEL chip else if you use debugIN port then the debugger controls it. If you do not intend to use SWDCLK at all after programming, just connect it to ground GND (maybe temporarily). That should guarantee that it remains stable. And no you cannot disable that pin

RE: exit from debug mode (S110)

Jason — Thu, 25 Jun 2015 02:31:34 GMT

Hi Aryan, is there some way to avoid nRF51822 to enter the debug mode? from the reference manual "To guarantee that the device remains in normal mode, the SWDCLK line must be held low at all times ", but in my application, as the power is unstable in some times, the device could be reset, so it may enter the debug mode, can i disable the SWDCLK pin in some way?

RE: exit from debug mode (S110)

Jason — Thu, 25 Jun 2015 02:19:37 GMT

Hi, ting, what does the "hardware problem" mean ? a pull down register on the SWDCLK pin?

RE: exit from debug mode (S110)

ting² — Thu, 23 Apr 2015 12:54:53 GMT

Hello, Sorry for the late answer. We found out it is a hardware problem on our system. Thank you for all your answers.

RE: exit from debug mode (S110)

Susheel Nuguru — Thu, 23 Apr 2015 11:29:26 GMT

Hi ting, do you have more info on this thead?

RE: exit from debug mode (S110)

Susheel Nuguru — Mon, 23 Mar 2015 08:59:11 GMT

Try to perform the exit procedure assuming that the system is in Debug mode and see if the current consumption decreases, if not something else is drawing the current. With this we can atleast eliminate the the device is not in debug mode. below is the procedure to do it.

Normal mode can always be resumed by performing a "hard-reset" through the SWD interface:

Enable reset through the RESET register in the POWER peripheral.
Hold the SWDCLK and SWDIO/nRESET line low for a minimum of 100 μs.

RE: exit from debug mode (S110)

ta2 — Fri, 20 Mar 2015 23:07:53 GMT

What are you using as your programmer/debug device? Is it connected to your device when you are seeing the ~1mA current draw?

The little J-Link Lite boards that ship with some of the developer kits draw power from the nRF51 VDD. That confused me at one point since the Segger "black box" style J-Link devices don't do that.