Still retained in debug mode nrf51822

[Satheeshkumar]

hi all

I am facing the issue that the chip still retains in debug mode. SWDCLK pin has connected to GND directly.

steps:

1. after flashed hex file, removed debugger from the chip and made a hard reset.

2. now my customized application has communicated with another device via UART(note: this is half-duplex communication and multiplexing UART line and power line to another device).

3.it again resuming debug mode and retain( ~1mA).

4.oftenly resetting the chip automatically.

NOTE:

1.SWDIO has connected to VDD with 10K resistor.

2.SWDCLK has connected to GND directly. I made strong GND on SWDCLK pin.

please help anyone.

thanks in advance

[Turbo J]

The "debug mode" can only be switched OFF by a power cycle or the debugger itself.

For the JLink commander, I use the following commands to switch debug mode off:

if swd
speed 2000
connect

readDP 1
writeDP 1 0
q

First 3 lines are to connect to the chip. After executing these commands you should see a drop in current consumtion.

Note that enabling the UART would also cause about 1mA current consumtion, as this requires the HFINT or HFCLK to be up and running.

[Satheeshkumar]

thanks for the response. after UART communication, the chip successfully executes sleep function. but it still retains 1 mA, even though I had disabled UART function before sleep there is no any HFCLK module running. And also the chip has reset sometimes automatically. this is purely debugging mode issue.