[CoreSight] Select ETB/ETF

Hi everyone,

Could you help me to find a document that shows how to select between ETB/ETR. I already referred to http://infocenter.arm.com/help/topic/com.arm.doc.ddi0461b/DDI0461B_tmc_r0p1_trm.pdf

But it only mentions about the "ATBM_AXIM_CFG" parameter and no where shows more information and how to use about this parameter.

My concern is how to switch from ETF to ETB  while we are in ETF configuration ?

Thank you very much.