SDU Registers not writeable in BF60x Emulation mode

Hi !

We have Troubles to disable Watchdog in Emulation mode - therefore we want to set the EMEEN in SDU_CTL reg.

but within the emualtor we are not able to set/reset any of this bits in SDU_CTL. ???

So the watchdog never stops in Emulator and trigger a System reset 

how could we ctrl. this emeen bit ? HR-Manual explain that

"register may be reset only by asserting the JTG_TRST pin." 

Is this also valid for Manipulation some Content in this reg? or what is the correct way to set/reset SDU_CTL ?

Kind regards chris